Izvorni znanstveni članak

Synthesis, Characterization and Ethanol Sensing Properties of Tin Oxide Nanostructures

Anima Johari ; Physics Department, Indian Institute of Technology Delhi, Indi
Vikas Rana ; Physics Department, Indian Institute of Technology Delhi, Indi
Mukesh Chander Bhatnagar ; Physics Department, Indian Institute of Technology Delhi, Indi

Sažetak

One‐dimensional nanostructures of Tin oxide
(SnO2) have been synthesized by thermal evaporation
method with and with out a catalyst on silicon substrate.
The nanostructure growth was carried out by using a
mixture of SnO2 and graphite powders at a temperature
of 1050C in nitrogen (N2) ambience. The synthesized
SnO2 nanostructures show polycrystalline nature with
tetragonal rutile structure. SEM investigation reveals
wire‐like and rod‐shaped nanostructures on silicon
substrate, with and without the gold catalyst layer
respectively. EDX and TEM observation concludes that
the uniform SnO2 nanowires (diameter ~ 25 nm and
length ~ 50  μm) grow with vapor‐liquid‐solid (VLS)
mechanism whereas, the SnO2 nanorods with varying
diameter grow with vapor‐solid (VS) mechanism. UV‐
Vis spectra estimates that the optical band gaps of the
SnO2 nanowires and nanorods were 3.92 eV and 3.67 eV
respectively. As synthesized single SnO2 nanowire
based gas sensor exhibit relatively good performance to
ethanol gas. This sensing behaviour offers a suitable
application of the SnO2 nanowire sensor for detection of
ethanol gas.  

Ključne riječi

Tin oxide; nanostructures; thermal evaporation; and atmospheric pressure growth

Hrčak ID:

76917

URI

https://hrcak.srce.hr/76917

Datum izdavanja:

15.9.2011.

Posjeta: 1.843 *