TITLE

The role of stoichiometry of indium and oxygen on gas sensing properties of indium oxide nanostructures

AUTHOR(S)
Kumar, Mukesh; Mehta, B. R.; Singh, V. N.; Chatterjee, R.; Milikisiyants, S.; Lakshmi, K. V.; Singh, J. P.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/22/2010, Vol. 96 Issue 12, p123114
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report direct evidence of the role of stoichiometry of one-dimensional indium oxide (IO) nanostructures grown by vapor-phase evaporation method on the ethanol gas sensing properties. The stoichiometric crystalline In2O3 nanowires grown under oxidizing (water) ambient exhibit about two orders of magnitude higher sensor response value of 281 in comparison to nonstoichiometric (In/O ∼0.75) nanotubes grown under reducing (ethanol) ambient in presence of 1000 ppm ethanol gas at 300 °C. We propose that for a stoichiometric IO nanowire, Debye region completely depletes the nanowire from free charge carriers which results in a significant increase in the sensor response.
ACCESSION #
48837210

 

Related Articles

  • Chemists make a molecular junction box. Emsley, John // New Scientist;9/8/90, Vol. 127 Issue 1733, p38 

    Reports on University of South Carolina-Columbia scientists' creation of a connection between two molecular wires, each a short chain of polythiophene rings. Potential use of molecular wires in creating microscopic devices for storing information, chemical sensors and organic computers; Use of...

  • Size-dependent recombination dynamics in ZnO nanowires. Reparaz, J. S.; Güell, F.; Wagner, M. R.; Hoffmann, A.; Cornet, A.; Morante, J. R. // Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p053105 

    A deep understanding of the recombination dynamics of ZnO nanowires (NWs) is a natural step for a precise design of on-demand nanostructures based on this material system. In this work we investigate the influence of finite-size on the recombination dynamics of the neutral bound exciton around...

  • Three-dimensional nanofabrication by electron-beam-induced deposition using 200-keV electrons in scanning transmission electron microscope. Liu, Z.Q.; Mitsuishi, K.; Furuya, K. // Applied Physics A: Materials Science & Processing;Apr2005, Vol. 80 Issue 7, p1437 

    Attempts were made to fabricate three-dimensional nanostructures on and out of a substrate by electron-beam-induced deposition in a 200-kV scanning transmission electron microscope. Structures with parallel wires over the substrate surface were difficult to fabricate due to the direct deposition...

  • Hydrothermal synthesis and microstructure investigation of nanostructured bismuth telluride powder. Zhao, X.B.; Ji, X.H.; Zhang, Y.H.; Cao, G.S.; Tu, J.P. // Applied Physics A: Materials Science & Processing;Apr2005, Vol. 80 Issue 7, p1567 

    Nanostructured thermoelectric Bi2Te3 powders with various morphologies were hydrothermally synthesized using different precursors and routes to give an experimental comprehension on the formation of the nanopowders. It was found that the polyhedral Bi2Te3 particles are formed by surface...

  • Self-assembly: Nanowires find their place. Gates, Byron D. // Nature Nanotechnology;Jul2010, Vol. 5 Issue 7, p484 

    The article discusses research on the potential uses of nanowires through the methods of synthetic chemistry. It references a study by Erik Freer et al that was published in "Nature Nanotechnology" on the refined method of nanowire assembly to achieve precision of combination and area of...

  • Mo6S6 nanowires: structural, mechanical and electronic properties. Vilfan, I. // European Physical Journal B -- Condensed Matter;May2006, Vol. 51 Issue 2, p277 

    The properties of $\ensuremath{\mathrm{ Mo_6S_6 }}$ nanowires were investigated with ab initio calculations based on the density-functional theory. The molecules build weakly coupled one-dimensional chains, like $\ensuremath{\mathrm{ Mo_6Se_6 }}$ and Mo6S9-xIx, and the crystals are strongly...

  • Nanostructures: a platform for brain repair and augmentation. Vidu, Ruxandra; Rahman, Masoud; Mahmoudi, Morteza; Enachescu, Marius; Poteca, Teodor D.; Opris, Ioan // Frontiers in Systems Neuroscience;Jun2014, Vol. 8, p1 

    Nanoscale structures have been at the core of research efforts dealing with integration of nanotechnology into novel electronic devices for the last decade. Because the size of nanomaterials is of the same order of magnitude as biomolecules, these materials are valuable tools for nanoscale...

  • Nanometer scale marker for fluorescent microscopy. Hiraga, Takashi; Iketaki, Yoshinori; Watanabe, Takeshi; Ohyi, Hideyuki; Kobayashi, Kazumasa; Yamamoto, Noritaka; Mizokuro, Toshiko; Fujii, Masaaki // Review of Scientific Instruments;Jul2005, Vol. 76 Issue 7, p073701 

    To establish a calibration method of optical performance in fluorescence microscopy, we fabricated a fluorescent nanometer-scale marker by combining a dry dye method for polymer film and fine lithography. The marker has a 50 nm line-and-space fluorescent pattern, finer than the optical...

  • Germanium nanowire synthesis using a localized heat source and a comparison to synthesis in a uniform temperature environment. Redcay, Christopher J.; Englander, Ongi // Journal of Materials Research;9/14/2011, Vol. 26 Issue 17, p2215 

    In this work, we compare the synthesis of germanium nanowires (GeNWs) using a highly localized heat source with GeNWs synthesized in a uniform temperature environment. With the exception of thermal environment, identical synthesis parameters were maintained in all experiments. The localized heat...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics