Preparation and modification of vanadium-oxidenanowires
Maria Szabo1,BalazsBuchholtz2, Zoltan Konya1,2, AkosKukovecz1,3
1
Department of Appliedand EnvironmentalChemistry, University of Szeged, Szeged,
Hungary
2
MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, H-6720 Szeged,
Rerrichter
1,
Hungary
3
“Lendület” Porous nanocomposites Research Group, H-6720 Szeged, Rerrichter 1, Hungary
Nanotechnology and nanostructured materials have been in the center of the attention in
the past few decades. Nanotechnology is „the design, characterization, production, and
application of structures, devices, and systems by controlled manipulation of size and shape at
the nanometer scale (atomic, molecular, and macromolecular scale) that produces structures,
devices, and systems with at least one novel/superior characteristic or property”1. The
properties of these new materials are different from the properties of the bulk matter and that
is the reason why they can be used widely
As a result ofthe multiple valence state of vanadium, vanadium pentoxidehas versatile
redox-dependent propertythus these materialscan be applied in many field, such as in
catalysis, electrochromism, and electrochemistry. The nanostructured form of this material
hasbeen employed in FETs,sensors,spintronic devices,and nanolithography templates.2
In our case ammonium- metavanadate was used as precursor. The pH of the reaction
mixture was set using nitric acid and in some cases P123 surfactant was also added. The
hydrothermal route was chosen to synthesize the micron-long VOx nanowires.The effect of
other metal-salts on the synthesis and on the
morphology of
the
nanowires
was
also
examined. The thermal stability of the structure
was investigated as well.Self-supporting films
were filtered. These films were irradiated by an
excimer/dye laser (248 nm) to see if selfassembly of the nanowire occurred. The asprepared samples were characterized by XRD,
SEM, TEM, EDX.
1
Nanomedicine: nanotechnology, Biology, and Medicine1 (2005) p. 150
2
Chem. Mater. 2006, 18, 2787-2804