NANOSENSORS
PRESENTED BY:- SAKSHI DAVE
PRK18BT3010
PRESENTED TODR.T. JESSE JOEL
WHAT ARE SENSORS??
• A sensor is a transducer that
converts a measurement (a quantity
or parameter) into a signal that
carries information.
• Nanosensors are tiny Sensors in the
size of a few nanometers 10 TO
100 nanometer.
• They can detect the presence of
nanomaterial or molecules in that
size and even smaller.
HISTORY OF NANOSENSORS
•
In 1990 Dr. Wolter founded his own company called NANOPROBE. After further path breaking
developments NANOPROBE became the first company worldwide to satisfy the emerging need for high
quality AFM sensors.
•
1995 "Dr.-Rudolf-Eberle Award", innovation award of the German State of Baden-Wurttemberg (one of
the high-tech centres in Germany) for exemplary achievements
•
1995 Innovation prize awarded by the Germany Industry
•
1999 "Georg Waeber innovation prize" awarded by the society for the promotion of microelectronics
•
October 2002 NANOSENSORS integrated into the Swiss-based NanoWorld AG.
•
2003 NANOSENSORS™ introduces the AdvancedTEC™, a revolutionary new AFM probe type that
allows precise positioning
•
2007 NANOSENSORS™ launches new Silicon MFM Probe Serie
NanoSensor
s
Optical
Nanosensor
s
Proximity
Nanosensor
s
Ambient
Light
Nanosensor
s
Biological
Nanosensor
s
Chemical
Nanosensor
s
Antibody/A
ntigen
Interaction
Chemical
Compositio
n
DNA
Interaction
Molecular
Concentrati
on
Enzymatic
Interaction
Physical
Nanosensor
Pressure
Force
Mass
Displaceme
nt
BIONANOSENSORS
WORKING OF BIOSENSOR
• A biosensor is a measurement system for the detection of an analyte that
combines a biological component with a physicochemical detector and a
nanobiosensor is a biosensor that measures the signal on the nanoscale size.
• The interaction of the analyte with the bioreceptor is designed to
produce an
effect measured by the transducer, which converts the information into a
measurable effect, such as an electrical / electronic signal.
(e)
(d)
(a)
(b
(c)
(
f)
APPLICATIONS OF NANOBIOSENSORS
•
Medicinal uses of nanosensors mainly revolve around the potential of nanosensors
to accurately identify particular cells or places in the body in need. By measuring
changes in volume, concentration, displacement, velocity, gravitational, electrical
and magnetic forces, pressure or temperature of cells in a body, nanosensors may be
able to distinguish between and recognize certain cells, most notably those of
cancer, at the molecular level in order to deliver medicine or monitor development
to specific places in the body. In addition, they may be able to detect macroscopic
variations from outside the body and communicate these changes to other
nanoproducts working within the body.
APPLICATIONS OF NANOSENSORS
https://youtu.be/YhPnPjv
bGLI
APPLICATIONS
• To detect various chemicals in gases for pollution monitoring
• For medical diagnostic purposes either as bloodborne sensors or in lab-on-achip type devices
• To monitor physical parameters such as temperature, displacement and flow
• To monitor plant signaling and metabolism to understand plant biology
• To study neurotransmitters in brain for understanding neurophysiology.
Nanowire Nanosensor
http://cyclotron.aps.org/weblectures/biology-physics/lieber/real/sld023.htm
Future Nanosensors
15
http://cyclotron.aps.org/weblectures/biology-physics/lieber/real/sld025.htm
Applications of Nanosensors
Porous silicon gas sensor.
Novel Gas Sensors Based on Porous Silicon Offer Potential for LowVoltage, Low-Cost Sensor Arrays Integrated with Electronics
Developed by researchers at the Georgia Institute of Technology
16
Conclusions
Existing nanosensors have realistic applications
Current envisioned nanosensors are still based on macrosensing
techniques that are enhanced or miniaturized
Enabling nanotechnology and future nanosensors will be possible
with the development of nanoelectronics, and integratable
nanodevices
Nanosensors will ultimately have an enormous impact on our
ability to enhance energy conversion, control pollution, produce
food, and improve human health and longevity.
17
Read the sensor
• Consumers increasingly need to know what ingredients or components are in the product and how the product
should be stored, used, and discarded after use. Smart tags and stickers, for example, will be able to
communicate directly with the customer via thin film devices that provide visual information. Many companies
have deployed IP solutions on the market.
• RipeSense is the first intelligent sensor label that changes color to indicate the ripeness of the fruit. It works
through the reaction of the aromas released by the fruit as it ripens; initially it is red and then graduates to
orange and finally yellow, depending on the selection of the desired level of maturity when it comes to eating
the fruit.
Nanosensors to detect humidity or temperature changes due to moisture ; sensor
for detecting Escherichia coli in a food sample; biosensor for instantly
detecting Salmonella in foods. The IP incorporating nanosen- sors will have
great benefits for the food industry. These NM in the form of tiny chips
invisible to the human eye are embedded in food or in containers, for use as
electronic bar code, which allows for the monitoring of food in all its phases
(production, processing, distribution, and consump- tion).
Table 1 e Current status of nanotechnolog y-enabled food products.
Sector
Application
Nanomaterials
Food processing
Color additives
Manufacturer
TiO2
Exempt from
certification
Exempt from
certification
Synthetic iron oxide
Additive or polymer
production aid
Food contact packaging
ZnO
Iron oxide
Aluminium oxide
Silicon dioxide
Cobalt oxide
Manganese oxide (E530)
Titanium nitride
Authorized by EC 10/
2011
Carbon black
Authorized by EC 10/
2011; no longer
authorized by the
U.S. FDA as additives
FCS Inventory a
Preservatives
Silver-silica
Flavor carrier
Silicon dioxide (E551d)
Marking fruit and
vegetables
Anticaking agents
Nutritional dietary
supplement
Silicon dioxide (E551)
Pesticides detection
Pathogens detection
Toxins detection
Edible film/coating
Current status
Silicon dioxide (E551)
Copper oxide
Iron oxide
ZnO
Zinc Oxide QDs
Magnetic nanosensors
Plasmonic nanosensors
Fluorescent nanosensors
Fluorescent nanosensors
Plasmonic nanosensors
Phosphorescent QDs
Chitosan/Nano-Silica Coating
Poly-ε-caprolactone
Nanoemulsion/Quinoa Protein/
Chitosan
Bio-nano-hybrid pectins and LDHsalicylate
Nanoemulsion with lemongrass
essential oil
Nanox Intelligent
Materials
Authorized by EC
1334/2008
Exempt from
certification
REGb
Note
<1% by weight of the food
[41]
<0.25% (for dogs and cats) and 0.1
(for human) % by weight of the
finished food
Authorization based on
conventional particle size
[41,42]
[43]
No migration reported. Only to be
used in PET bottles up to 20 mg/kg
<2.5% w/w in the polymer
FCN No. 1235. <4 ppm by weight of
silver as an antimicrobial agent
blended into polymers
<10,000 mg/kg, excluding foods for
infants and young children
<2% of the ink solids
[44]
<2% by weight of the food
Approved for animal feed
[46]
[47]
GRASc
R&D
R&D
R&D
Tested on Longan fruit
Tested on fresh-cut “Red Delicious”
apples
Tested on fresh strawberries
R&D
Reference
[45]
[41]
[33]
[34,35]
[36]
[37]
[38]
[39]
[40]
[48]
[49]
[32]
Tested on fresh apricots
[30]
Tested on fresh-cut Fuji apples
[31]
•
References:-
1. Guillermo Fuertes et. al; Intellligent Packaging System: Sensors and Nanosensors To
Monitor Food Quality And Safety; Hindawi Publishing Corporation; Journal Of Sensors;
Volume 2016
2. Xiaojia He et al; The Current Application Of Nanotechnology In Food And
Agriculture; Sciencedirect; Journal Of Food And Drug Analysis; 3rd December 2018
url:- https://youtu.be/YhPnPjvbGLI