Session C6 Paper 2356 A SMALL FUTURE: NANOTECHNOLOGY IN FABRICS Peter Lunsford (pcl5@pitt.edu), Yash Palawat (yap4@pitt.edu) Abstract – There is no question that technology is advancing faster than it ever has before. Even though many people associate advancement with an increase in size, the exact opposite is true for nanotechnology. It deals with materials, structures, and other devices ranging in size from 1 to 100 nanometers. This paper will discuss the usage of nanotechnology, specifically nanofabrics, and the engineering processes behind it. It will cover the benefits and drawbacks of this technology, what can be achieved, what ethical quandaries need to be considered, and offer ideas for future innovations. The main focus for this paper will be nanotechnology in fabrics, and the various aspects of it. Some clothes are water repellent and stain resistant, while others generate electricity. In addition, there are many other private uses for nanofiber technology, including medical and military applications. This paper will be introduced by first discussing nanotechnology as a whole. Next, the paper will continue on to discuss nanofibers, and the engineering processes behind them. The last section of the paper will propose possible future advancements and applications in the field. Nanotechnology is a science that holds much room for innovation. By writing about this topic, we hope to not only enlighten our readers to the wonders of this unseen world, but also paint a realistic portrait of the future. Key Words – Fabrics, Nanofibers, Nanotubes, Textiles, nanotechnology treated clothing is both liquid and stain resistant. The coffee slides right off. You leave the elevator, not a mark in sight. Stain resistance is just one small application of this technology. Others include waterproofing, generation of electricity, bacterial detection and resistance, and heightened strength [1]. These functions have a plethora of future uses in commerce, medicine, and the military, but there is still much research that needs to be done. However, nanofibers are already becoming a part of society. AHEAD OF THE NANOTECH CURVE Without a doubt, nanofabrics are going to be used for commercial products. There are numerous companies today that integrate this technology into their designs to provide added benefits to their consumers. Located in Oakland, California, Nano-Tex is one of the leading businesses that work with nanotechnology. To enhance their apparel with nanomaterials, Nano-Tex uses a fabric coating – “tiny molecules that permanently attach to fibers without clogging the weave” [2]. One application is speed drying, which reduces water absorption and maintains breathability of clothing. This is primarily used in swimwear, so board shorts and swimsuits dry fast. Another application is odor resistance, most commonly used in athletic wear. The nanofibers attract, isolate, and neutralize the odors immediately. Other applications include stain resistance, moisture management, static elimination, and wrinkle reduction. Not only does this get applied to clothing, but also to home goods, including pillows, sofa cushions, and sheets. By implementing nanotechnology in its products, Nano-Tex is defining itself as an innovator in the field. However, when it comes to incorporating nanotechnology in merchandising, America isn’t the only advocate. Schoeller Technologies, a company based in Switzerland, is working on a new technology called NanoSphere. NanoSphere is a “finishing treatment of fabrics, which provides a self-cleaning feature and resists stains” [3]. This technology is capable of producing garments that can block UV radiation, repel rain and snow, and prevent abrasions and tears. Currently, it is being applied in many different products, including ski pants, cliff jackets, and a little closer to home, Levi’s skinny jeans. What has already been produced using this technology is remarkable; what is going to be made in the future is extraordinary. Before getting to the future however, the production process will be described in detail. Nanotechnology, TAKING THINGS DOWN TO SIZE Imagine machines that could clean dishes, manufacture consumer products, or decompose garbage. Naturally, one might think of washing machines, assembly lines, or trash compactors. Well, imagine a world in which these machines are so small, that they are invisible to the naked eye. This is the future of nanotechnology. Dealing with materials and devices ranging from 1 to 100 nanometers in length, it is a science that is becoming increasingly prevalent in society. As research and development advances, new uses of this technology continue to be discovered. Though there are hundreds of applications, this paper will focus specifically on fabrics and textiles. With nanotechnology on the rise, the possibilities for the future of fabrics are limitless. FUNCTIONAL FABRICS Five minutes before a big meeting, you’re heading up a crowded elevator, large coffee in hand. After an exchange of elbows, your double latte becomes a single, and the rest ends up on your shirt. Fortunately, your new Twelfth Annual Freshman Conference February 10, 2012 1 Lunsford, Palawat As a whole, nanotechnology in fabrics can be split up into two main sections – improved fabric finishing and new nanofibers and yarns [1]. These two methods are very different and produce different results when applied to fabrics, but both are equally useful. Once the process is completed, the cotton sustains several enhanced properties, including UV protection, autonomous cleaning, and superior strength and durability. This method of surface treatment of cotton fabrics yields many benefits, but in order to harness the full capability of nanoparticle treated textiles, nanofibers and yarns must also be taken into consideration. Improved Fabric Finishing New Nanofibers and Yarns This process deals with treatment of pre-existing fabrics, as opposed to creating entirely new materials. The most relevant method involves coating the surfaces of textiles with a polyelectrolyte solution. This is also called the “dipping technique”. At its most basic, the dipping treatment is effective due to electrostatic attraction between oppositely charged molecules. These molecules “provide an excellent basis for creation of nanolayer films” [4]. The most used polyelectrolyte solution is titanium dioxide, TiO 2 [4]. To coat a fabric, two solutions of polyelectrolytes need to be made, each with opposite charge. To make these solutions at relatively high temperatures, deposition methods are used. For fabrics that cannot withstand high temperatures, low temperature photocatalytic titanium films are used. In one specific experiment, cotton fabrics were first given a positive charge using a “chemical modification technique named cationization” [4]. Secondly, an anionic TiO2 colloid solution and a cationic TiO2 colloid solution were prepared. The positively charged fabrics were then submerged for five minutes in the anionic solution, then deionized water, then the cationic solution, and then deionized water again [4]. The fabrics were then “dried at 60 °C and cured at 130 °C for 3 minutes” [4]. The below figure shows scanning electron microscope (SEM) photos of cotton fibers after 10 layers and 16 layers of TiO 2 films were deposited respectively. Altering and enhancing the structure of fabric fibers by introducing nanotube networks characterize this method of treating textiles. Developments in this area have led to one of the most functional approaches, carbon nanotubes (CNTs). Applying CNTs involves entwining nanotube networks around typical cotton fibers, as shown below. THE PROCESS FIGURE II [5] STRUCTURES OF COTTON FIBERS Typically, CNTs are prepared and modified using a surface grafting technique, and then the “poly-butylacrylategrafted CNTs are applied to cotton fabrics using a common dipping–drying–curing finishing procedure” [5]. This process is very similar to the previously mentioned surface treatment. However, it focuses on a much smaller scale by altering the fibers themselves. Before beginning this process, the cotton substrates are rinsed with a nonionic detergent in order to remove finishing chemicals that might interfere with the treatment, such as wax and grease [5]. After the clean cotton samples are placed in the CNT emulsion and padded with a constant pressure, they are rinsed with water several times to ensure the even and thorough distribution of the nanotube networking. The goal of this method is to effectively form a network of armor around the cotton fibers. In order to accomplish this, the CNTs are first treated with soft polymers so they are malleable enough to attach to the fibers. An artificial lotus leaf structure is then created and wrapped around the individual cotton fibers [5]. The below figure shows SEM photos of pristine cotton fibers (a and b) as compared to FIGURE I [4] SEM IMAGES OF COTTON FABRIC COATED WITH 10 AND 16 LAYER NANOTIO2 2 Lunsford, Palawat CNT networked cotton fibers (c, d, e, and f). INTEGRATING NANOTECHNOLOGY IN CLOTHING Implementing nanotechnology in fabrics is a complicated process. Researchers are constantly trying to expand its functionalities in order to advance the field of science. In addition to having many scientific uses, there are many consumer applications. The two most prevalent benefits of nanotechnology in clothing are increasing water resistance and generating electricity. So far, not much has been done in the latter field, but as demonstrated previously in the paper, there has been some headway into waterproofing. Keeping Water at Bay Finding the perfect wave might take all day, but waiting for your swimsuit to dry shouldn’t. Many clothing manufacturers have tried their hand in creating water resistant apparel, but that can only go so far. Nanotechnology infused clothing presents a method of making fabric exponentially more waterproof. The applications of nanotechnology inspired waterproof clothing are practically limitless. If liquid were to bead up and roll off of fabric, the swim apparel industry would drastically change. Every swimsuit would be perfectly dry immediately upon leaving the water, allowing for other activities to be performed. Olympic swimmers could make use of this technology by creating speed suits that produce minimum amounts of friction when traveling through the water, making them dramatically faster and more agile. In a similar manner, wetsuits could use the same properties to enhance the movement capabilities of scuba divers. However, this is not only useful in swimwear. Sports apparel is under constant development, introducing new technologies and materials every day. After prolonged vigorous physical activity, heavy, sweat soaked gear can slow athletes down. Clothing that completely wicks sweat can keep an athlete dry, which will improve performance. Camping, fishing, hiking, skiing, and other apparel that is forced to brave the elements would be greatly enhanced. These amazing articles of clothing are closer to becoming a reality than one might think. Using the previously mentioned techniques of applying nanotechnology to fabrics, especially carbon nanotubes, water repellency is super enriched. With the introduction of the artificial lotus leaf structure, the cotton fibers become extremely hydrophobic [5]. The nanotubes interact with each other as well as the cotton to create a small amount of surface roughness, allowing water to group together and rest on the top of the fabric as demonstrated in the figure below. FIGURE III [5] SEM IMAGES OF PRISTINE COTTON FIBERS AND CNT TREATED COTTON FIBERS The pristine fibers are smooth and have veins, as shown in images (a) and (b). In the other four images, however, an intertwined network of nanofibers can be seen. A “unique aspect of nanotechnology is the vastly increased ratio of surface area to volume that is present in many nanoscale materials which opens new possibilities in surface-based science” [5]. The process of manipulating fabric fibers to include carbon nanotube networking takes full advantage of this phenomenon and is perhaps the most effective method of incorporating nanotechnology with fabrics. The main challenge in engineering this technology to achieve its maximum potential is to make sure that the CNT network is not only evenly dispersed among the fibers, but also dense enough to shield the cotton. Harnessing this process of applying nanotechnology to cotton substrates provides some remarkable enhancements, namely flame retardancy, UV-blocking, and extreme water repellency. As research has shown, “this CNT coated textile will have numerous applications in the development of textiles for healthcare, sports, military, and fashion” [5]. 3 Lunsford, Palawat fabric, and then submerged in a reactant solution for twelve hours. At a temperature of 80°C, nanowires uniformly grow from the seed layer with several hundred nanometers between each fiber. As of now, researchers have measured a current of about four nanoamperes, and a voltage of four millivolts from one layer. By combining more layers, the current and voltage can be increased. As a comparison, a standard household light bulb produces .54 amperes at 110 volts. This technology has implications in nearly every aspect of life. When the day comes that there is substantial electric output from clothing, it will be immensely useful. We would no longer need car chargers, or iPod chargers, or any chargers for that matter. You could keep a laptop on your lap and a cellphone in your pocket and charge them both at the same time. The only problem regarding this technology is that the zinc oxide is sensitive to moisture, so it would be difficult to wash. However, if the fabrics are water repellent, odor resistant, stain resistant, and bacteria resistant, then what is the need to ever clean them? FIGURE IV [5] SEM IMAGE OF A WATER BEAD ON A CNT FIBER Give a slight angle, the water beads would simply roll off of the fibers. By replacing the carbon nanotubes with silicon, the result would be an even more chemically hydrophobic surface [6]. With this technology, clothing could theoretically be submerged for any period of time and come out completely dry. However, this is not the only instance of useful, efficient clothing. TREATMENT OF THE FUTURE Electric Feel The fields of science and medicine exist in a symbiotic relationship; advancement in one is always accompanied by advancement in the other. Naturally, developments in nanoscience will bring about new technology to be used in medicine. Ranging from first degree burns, to broken bones, to fatal diseases, ailments around the world can be treated using applications of nanotechnology in medicine. Nanotechnology in textiles comes into play with medicine in many ways, involving fabrics that are water resistant, breathable, self-healing, antibacterial, and insect repellent. Imagine the implications of having clothing that was able to generate electricity. You could put an iPod or cellphone in your pocket, and while walking, it would automatically charge. No more worrying about a dead iPod or scrambling to find a cellphone charger before bed. Researchers at the Georgia Institute of Technology have shown that “pairs of textile fibers covered with zinc oxide nanowires can generate electrical current using the piezoelectric effect” [7]. This effect is essentially the generation of electricity through mechanical stress. The nanowires are grown in pairs, with one wire coated in gold to serve as the electrode, shown below. Changing Bandages Anyone that’s ever had a casted ligament knows that going for a swim or taking a shower is a pain. The method of casting broken limbs has been the same for years, and is due for an upgrade. It has the possibility of becoming completely revolutionized if fused with nanotechnology. Waterproof nanofiber casts sanction more freedom, allowing patients to not be held back by their bandages. Because these casts would stay dry and clean, they would in turn be more comfortable and promote a faster healing process. This is advantageous not only for the patient but also for the doctor. The patient would spend less time in a cast, and be more comfortable during that time; the doctor would treat and check up on the patient less frequently, allowing them to efficiently handle more cases. As far as bandaging goes, casts are the extreme case. Benefits of nanotechnology in fabrics extend much farther into the medical field with simple, everyday wounds. A simple adhesive bandage that accelerates the healing process sounds like something out of a science fiction movie, but is actually a true possibility. University of Akron FIGURE V [7] FIBERS ALTERNATE, ONE COATED IN GOLD AND THE OTHER NOT COATED The gold wires scrub the other wires, and generate the mechanical stress required for piezoelectricity. To physically create these nanowires, a “100 nanometer seed layer of zinc oxide” [7] is coated on top of the desired 4 Lunsford, Palawat researchers have delved into this concept and emerged with surprising results. The two scientists “used electricity to spin ultrafine polymer fibers while infusing them with chemicals that [expose] a wound to oxygen” [8]. These bandages take advantage of nanofiber properties to combine the protection of a standard wound dressing with the healing benefits of medication and open air. The special bandages release small amounts of a natural chemical, nitric oxide gas, to hasten the body’s recovery process [8]. This is also extremely valuable to diabetics, because their bodies do not naturally produce enough nitric oxide gas to aid in curing injuries. Possibly the best part about these advanced bandages is that they are “inexpensive, lightweight and elastic, and conform to any wound without sticking” [8]. Additionally, researchers at the University of Bath are looking into using nanotechnology in fabric bandages that could aid in healing abrasions and burns. The way they attacked this concept is by infusing bandages with nanocapsules containing antibiotics [9]. These tiny pods are activated when the presence of pathogenic bacteria is detected, and thus can deliver treatment to the wound before infection sets in [9]. An added bonus of this dressing is that it changes color when the nanocapsules are triggered, alerting the patient as well as the healthcare professional that the wound might be in danger of infection, and the necessary measures can be taken. This significantly cuts down hospital time for burn victims and sufferers of flesh wounds. European scientists are conducting further research on this technology in order to determine appropriate materials to be used and a cost-efficient method of production. The most radical example of nanotechnology being implemented in bandages is currently being developed at the University of Illinois. Regarding the early stages of their new product, scientists say that “Rather than depending on the use of simple fabrics to keep wounds shut and sterile, these new bandages actually introduce living tissue in the wound to a specific pattern, effectively closing and shortening the healing time” [10]. A future application of this innovation may let scientists gain further insight into the healing process by programming blood vessels on the nanoscale into a bandage and seeing how they interact when applied to damaged skin [10]. The extent of benefits contributed to the medical field from these nanotech bandages is incalculable, as it services both patients and healthcare professionals. What could be even more beneficial, however, is if nanotechnology in fabrics helps to prevent wounds and infections before they even occur. bacteria, which makes them twice as dangerous. This is where nanotechnology comes into play. Researchers at the National Tsing Hua University in Taiwan are experimenting with the antibacterial properties of zinc oxide nanoparticles, and new forms of coating. They have discovered that ultrasound is a much cheaper way of applying the particles to fabrics and surfaces. Ultrasound “uses less materials, avoids waste, uses water as a solvent, and enables coating on only one side of the material, thereby reducing the amount of zinc oxide consumed” [11]. The zinc oxide particles were discovered to be extremely resistant to bacteria, “due to the fact they produce hydrogen peroxide, a major antibacterial chemical” [11]. The particles were even able to be applied to walls, while maintaining their anti-bacterial properties. Using this technology, zinc oxide particles can be used to cover the walls of nearly every building, ranging from hospitals to classrooms, greatly reducing the possibility of infections. It can also be applied to fabrics, creating clothing with antibacterial properties. However, though this could prevent bioterrorism or bacterial infections, it does not eliminate all health threats. Bacterial Resistance Of all the applications of nanotechnology in textiles, the most versatile and functional are in the military. Soldiers are constantly in danger and are always in dire need of lighter loads, greater comfort, and heightened security. All of the aforementioned uses of nanofibers and more would be extremely valuable when applied to the military. Adapting nanotechnology in fabrics for military use provides a multifunctional solution for many practical problems. Disease Prevention In Africa and South Asia, one of the most prevalent diseases is malaria. Killing almost one million people annually and infecting another 225 million, it currently has no cure. Malaria is a parasite which is transmitted from mosquitos to humans. The best defense people can hope for is insect repellant or hanging semi-effective nets to keep away the bugs. However, that is about to change. Researchers in Thailand are working on a new “nanofiber mosquito net that can kill malaria carrying mosquitos within six minutes of contact” [12]. These nets are laced with nanoparticles of the insecticide deltamethrin, a substance fatal to mosquitos and perfectly harmless to humans. The particles infiltrate the receptor cells on the feet of mosquitos when they come in contact with the net, rendering them unconscious, and then killing them a few minutes later. These nets last for two years, and can be washed over thirty times, as opposed to regular nets, which can only be washed three times before losing effectiveness. Though this technology is expensive, its efficiency makes it worthwhile. Hopefully these nets will begin to be produced on a large scale; this technology could save thousands of lives around the world. SMALL-SCALE WARFARE Bacteria are found in nearly every environment known to man. They are present in the air and on every surface. Most bacteria are not considered hazardous to human life, but there are many that are, including anthrax, dengue fever, SARS, E. coli and tuberculosis. There is currently nothing people can do to prevent coming in contact with these 5 Lunsford, Palawat The most far-reaching application of nanofibers in the military is to make “materials that can serve as building blocks for clothing and other gear to provide Soldier protection and survivability” [13]. Using nanolayer-treated fabric as a basis for soldier uniforms contributes virtually no extra weight while introducing controlled activity that can protect a soldier from threats, including the environment, explosives, as well as chemical and biological weapons [13]. A team of researchers at the MIT Institute for Soldier Nanotechnologies (ISN) is currently working on such a garment. They are using the previously discussed methods of chemical deposition and layer-by-layer structuring to create fabrics that will “enhance the battle suit in its purpose to serve and protect the Soldier” [13]. The most appealing form of this technology is called selective transport. Nanolayer-treated fabrics control which materials pass through them. This means that fabrics can be created that prevent specific airborne agents such as mustard and nerve gas, while keeping the cloth breathable and light by allowing air to easily permeate. One specific case of using this kind of selective transport textile has to do with military deployed submarines. When enlisted personnel operating a submarine are living in extremely close quarters, the spread of illness is a crippling threat. In cases such as this, bunks are often shared amongst two or more people. By employing selective transport textiles specialized to resist absorbance of pathogens in bunks, the path of bacteria would be significantly obstructed. A second area that the ISN is researching involves manipulating the electrical properties of carbon nanotube based fibers. CNT platforms are being used as a base to develop identification systems for possible threats, improved nighttime detection capabilities, and friend-or-foe recognition techniques [13]. Scientists at the ISN state “Carbon nanotubes are one of the most promising nanomaterials ever developed, lightweight and with exceptional mechanical and thermal resilience, electrical and heat conductance” [13]. In manipulating the flow of electric current through these nanowire grids, indicator systems can become smaller, lighter, and more effective. Finally, the ISN is looking into development in smart textile armor. Every day, soldiers on patrol are injured when improvised explosive devices, or road side bombs, detonate a few meters away. Now imagine that upon detecting the combination of temperature change and shockwave from the IED, the soldier’s battle suit immediately increases its rigidity and strength, effectively creating an instantaneous coat of armor. The soldier is knocked over, but arises unscathed. This is the initiative to develop functional and responsive elastomers using nanotechnology. The approach to this innovation “entails both a strong synthetic component for the creation of new functional materials with fieldresponsive side or main chains, as well as the generation of nanocomposite blends with these new materials and inorganic nanoparticles” [13]. Using nanotechnologyinfusing methods previously described, scientists have gained the ability to attach virtually any functional group to nanowire grids. They have explained that “This capability will be directed toward the development of responsive elastomers that are easily incorporated into fibers and fabrics, and which allow a 10 to 100% strain recovery and response” [13]. Further research into this idea can also yield fabrics with nano-sized membranes that open and close on command, due to an environmental trigger. This is another form of using the technology behind selective transport materials and nanofiber enrichments to enhance the survivability of military personnel. After discussing all of these benefits, however, the next logical step is discussing possible drawbacks. AN ETHICAL DILEMMA There is no question that there are numerous benefits to developing nanotechnology. A few have been detailed in this paper, and there are still countless more. However, all these advancements are only beneficial if used for the goal of improving society. In the wrong hands, this technology can bring about just as many problems for people as it can solutions. For this reason, the ethics of nanotechnology must be considered while the field is a relatively new subject. The positives of nanotechnology are immeasurable, but the concerns are also significant. At its most ideal, it can create a world where everyone has adequate food, safe water, and a clean environment. As detailed in this paper, it can improve the quality of life for people everywhere, enhance medical procedures, and provide better safety for the military. If all these are going to come to fruition, the process behind designing this technology needs to be completely safe. One large concern with nanofibers is their similarity to carcinogens. Studies are being done comparing carbon nanotubes to asbestos, and scientists have discovered that inhaling the CNTs are almost equally as lethal as inhaling the cancer causing substance. Asbestos and CNTs are dangerous due to their being small enough to inhale deep into one’s lungs and still being too long for the body to destroy. The fibers form scar-like tissue, and the body builds new cells over them, thickening the walls of the lungs. Asbestos can cause mesothelioma, a cancer of the membrane that lines vital organs. To test whether CNTs had a similar effect, mice were exposed to the nanotubes, and “the inside lining of the animals’ body cavities became inflamed and formed lesions” [14]. Of course, we have to take the bad with the good. This study was not meant to deter the development of nanofibers, but to caution against potential dangers. Hopefully researchers will be able to find a safer way to employ carbon nanotubes in fabrics. Though there are ethical dilemmas to be considered, with proper guidelines and regulations, nanotechnology can be extremely safe to use. Taking certain measures, such as 6 Lunsford, Palawat [11] Berger, Michael. “Antibacterial wallpaper through nanotechnology” Nanowerk 16 Nov. 2006 [Online]. http://www.nanowerk.com/spotlight/spotid=1036.php Accessed: 29 Feb. 2012 [12] Thipnampa, Jutharat. “Nanotechnology to net mosquitoes” The Nation 27 Aug. 2010 [Online]. http://www.nationmultimedia.com/home/2010/08/27/national/Nanotechnolo gy-to-net-mosquitoes-30136699.html Accessed: 29 Fed. 2012 [13] “Institute For Solidier Nanotechnologies”. Massachusetts Institute of Technology. http://web.mit.edu/isn/index.html; Accessed: 28 February 2012. [14] Greenemeir, Larry. “Study Says Carbon Nanotubes as Dangerous as Asbestos” Scientific American 20 May 2008 [Online]. http://www.scientificamerican.com/article.cfm?id=carbon-nanotube-danger Accessed: 29 Feb. 2012 establishing an advisory committee or tagging all nanomachines so they are traceable, will prevent the technology from falling into the wrong hands. CONCLUSION Nanotechnology isn’t just about making things smaller. Using various methods such as fabric finishing and new nanofibers, what was previously thought to be impossible is no longer unreachable. The future holds waterproof and electricity generating clothing. It holds bandages that detect and prevent infection. It holds fabrics that will be able to deflect bacteria and fight off disease. It holds smart battle suits that will protect and strengthen our soldiers. Nanotechnology will shape the world in ways we can’t even begin to imagine. When electricity was first discovered, people never thought they would be using it for anything other than replacing candles. Nobody expected washing machines, assembly lines, trash compactors, or countless other products. We have only begun to crack the surface of what can be achieved; the bounds of nanotechnology are limitless. ADDITIONAL SOURCES Chen Andrew “The Ethics of Nanotechnology”. Santa Clara University [Online]. Available: http://www.scu.edu/ethics/publications/submitted/chen/nanotechnology.htm l; Accessed: 25 Jan 2012 “Fashion is nano! (Nanotechnology in Clothing).” (11 May 2011). NanoBugle. http://www.nanobugle.org/2011/05/fashion-is-nanonanotechnology-in-clothing/; Accessed: 25 January 2012. Osman, Jheni. (25 Nov. 2011). “Perspective on Devolpment of Nanotechnology in Textiles”. The Guardian http://www.guardian.co.uk/nanotechnology-world/bring-on-the-benefits; Accessed: 25 January 2012 REFERENCES [1] Chen Jun, Gu Juanhong, and Liu Yan. (7 June 2010). “Perspective on Devolpment of Nanotechnology In Textiles”. Advanced Materials Research Vols. 113-114. http://www.scientific.net/AMR.113-116.670; Accessed: 25 January 2012. [2] “Nano-Tex: Performance fabrics for apparel, uniforms, and home furnishing” (2012). Nano-Tex. Available: http://www.nanotex.com/index.html# Accessed: 29 February 2012. [3] A.P.S. Sawhney and B. Condon, K.V. Singh, S.S. Pang and G. Li, David Hui. (2008). “Modern Applications of Nanotechnology in Textiles”. Textile Research Journal. http://trj.sagepub.com; Accessed: 25 January 2012. [4] Sule S Ugur, Merih Sarıısık and A Hakan Aktas. (7 June 2010). “The fabrication of nanocomposite thin films with TiO2 nanoparticles by the layer-by-layer deposition method for multifunctional cotton fabrics”. IOPscience. http://iopscience.iop.org/0957-4484/21/32/325603; Accessed: 25 January 2012. [5] Liu Yuyang, Wang Xiaowen, Qi Kaihong, Xin J.H. (06 May 2006). “Functionalization of cotton with carbon nanotubes”. Journal of Materials Chemistry. http://pubs.rsc.org/en/Content/ArticleLanding/2008/JM/b801849a; Accessed 25 January 2012. [6] Evans, Jon. “Nanotech clothing fabric ‘never gets wet’” NewScientist Tech 24 Nov. 2008: [Online] http://www.newscientist.com/article/dn16126nanotech-clothing-fabric-never-gets-wet.html. Accessed: 29 Feb. 2012. [7] Toon John (13 Feb 2008). “Fiber-based nanotechnology in clothing could harvest energy from physical movement”. Eurekalert. http://www.eurekalert.org/pub_releases/2008-02/giot-fni020908.php; Accessed: 25 January 2012. [8] Schleis, Paula. “Nanotechnology bandage speeds up healing” Nanowerk 15 Dec. 2006 [Online]. http://www.nanowerk.com/news/newsid=1156.php Accessed: 29 Feb. 2012 [9] “Nanotech bandage to detect and fight germs”. (10 July 2010). MumbaiMirror.com. http://www.mumbaimirror.com/index.aspx?page=article&sectid=7&content id=201007102010071003292532434dd5402; Accessed: 28 February 2012. [10] Chris Capps. (20 December 2012). “Nanotech Bandages will ‘Program’ Blood Vessels During Healing”. Unexplainable.net. http://www.unexplainable.net/Technology/New-Bandages-Program-Skinand-Blood-Vessels-During-Healing.shtml; Accessed: 28 February 2012. “The Ethics and Societal Impact of Nanotechnology” (2008). The Nanoethics Group. http://www.nanoethics.org/theissues.html; Accessed: 25 February 2012. Tung Wing Sze and Daoud Walid A. (14 June 2011) “Self-cleaning Fibers via Nanotechnology – A Virtual Reality”. Journal of Materials Chemistry http://pubs.rsc.org/en/Content/ArticleLanding/2011/JM/c0jm03856c; Accessed: 25 January 2012 ACKNOWLEDGMENTS We would like to thank the librarians at the Hillman Library for directing us towards online databases to find articles on nanotechnology. We would like to thank Deb Galle for reviewing our paper with us, and lastly, we would like to thank our co-chair Kenichi Agbim for being an excellent peer advisor. 7