Thermal and Optical Activation Mechanisms of Nanospring-Based Chemiresistors

Chemiresistors (conductometric sensor) were fabricated on the basis of novel nanomaterials—silica nanosprings ALD coated with ZnO. The effects of high temperature and UV illumination on the electronic and gas sensing properties of chemiresistors are reported. For the thermally activated chemiresistors, a discrimination mechanism was developed and an integrated sensor-array for simultaneous real-time resistance scans was built. The integrated sensor response was tested using linear discriminant analysis (LDA). The distinguished electronic signatures of various chemical vapors were obtained at ppm level. It was found that the recovery rate at high temperature drastically increases upon UV illumination. The feasibility study of the activation method by UV illumination at room temperature was conducted.

[1]  Landon Oakes,et al.  ZnO coated nanospring-based chemiresistors , 2012 .

[2]  Udo Weimar,et al.  An n- to p-type conductivity transition induced by oxygen adsorption on α-Fe2O3 , 2004 .

[3]  Vinayak P. Dravid,et al.  UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO , 2009 .

[4]  U. Weimar,et al.  Understanding the fundamental principles of metal oxide based gas sensors; the example of CO sensing with SnO2 sensors in the presence of humidity , 2003 .

[5]  Victor V. Sysoev,et al.  Temperature Gradient Effect on Gas Discrimination Power of a Metal-Oxide Thin-Film Sensor Microarray , 2004, Sensors (Basel, Switzerland).

[6]  J T L Thong,et al.  Improving the NH3 gas sensitivity of ZnO nanowire sensors by reducing the carrier concentration , 2008, Nanotechnology.

[7]  Hui Che,et al.  ZnO and MgZnO nanocrystalline flexible films: optical and material properties , 2011 .

[8]  R. Khan,et al.  The effect of grain boundaries inside the individual ZnO nanowires in gas sensing , 2010, Nanotechnology.

[9]  Xiao Wei Sun,et al.  Hydrothermally grown oriented ZnO nanorod arrays for gas sensing applications , 2006 .

[10]  B. Cuenya.  Synthesis and catalytic properties of metal nanoparticles: Size, shape, support, composition, and oxidation state effects , 2010 .

[11]  J. Yinon,et al.  Peer Reviewed: Detection of Explosives by Electronic Noses , 2003 .

[12]  Steven M. George,et al.  Surface Chemistry for Atomic Layer Growth , 1996 .

[13]  Partha Mitra,et al.  Chemically deposited zinc oxide thin film gas sensor , 1999 .

[14]  Łukasz Wachnicki,et al.  Characterization of ZnO Films Grown at Low Temperature , 2008 .

[15]  J. Yinon,et al.  Detection of explosives by electronic noses , 2003 .

[16]  A. M. Gas'kov,et al.  Nature of Gas Sensitivity in Nanocrystalline Metal Oxides , 2001 .

[17]  A. Kolmakov,et al.  Toward the nanoscopic "electronic nose": hydrogen vs carbon monoxide discrimination with an array of individual metal oxide nano- and mesowire sensors. , 2006, Nano letters.

[18]  Qing Wang,et al.  Gas Sensors Based on Semiconducting Metal Oxide One-Dimensional Nanostructures , 2009, Sensors.

[19]  Steven M. George,et al.  Viscous flow reactor with quartz crystal microbalance for thin film growth by atomic layer deposition , 2002 .

[20]  Stephen R. Forrest,et al.  Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes , 2008 .

[21]  Hailong Lu,et al.  Size Dependence of Gas Sensitivity of ZnO Nanorods , 2007 .

[22]  M G Norton,et al.  Transport properties of hybrid nanoparticle–nanowire systems and their application to gas sensing , 2006, Nanotechnology.

[23]  Daqing Zhang,et al.  High yield synthesis and lithography of silica-based nanospring mats , 2006 .

[24]  Dmitri O. Klenov,et al.  Enhanced gas sensing by individual SnO2 nanowires and nanobelts functionalized with Pd catalyst particles. , 2005, Nano letters.

[25]  U. Weimar,et al.  Understanding the fundamental principles of metal oxide based gas sensors; the example of CO sensing with SnO2 sensors in the presence of humidity , 2003 .

[26]  Joachim Goschnick,et al.  A gradient microarray electronic nose based on percolating SnO(2) nanowire sensing elements. , 2007, Nano letters.

[27]  Lai‐Sheng Wang,et al.  Chemisorption sites of CO on small gold clusters and transitions from chemisorption to physisorption. , 2005, The Journal of chemical physics.

[28]  M. Grant Norton,et al.  Optical properties of ZnO and MgZnO nanocrystals below and at the phase separation range , 2008 .

[29]  Liwei Lin,et al.  Local vapor transport synthesis of zinc oxide nanowires for ultraviolet-enhanced gas sensing , 2010, Nanotechnology.

[30]  M. G. Norton,et al.  Interaction of hybrid nanowire–nanoparticle structures with carbon monoxide , 2009, Nanotechnology.

[31]  노튼 그랜트,et al.  Method for manufacture and coating of nanostructured components , 2006 .

[32]  Zulfiqur Ali,et al.  Data analysis for electronic nose systems , 2006 .

[33]  Donald J. Hayes,et al.  Portable vapor generator for the calibration and test of explosive detectors , 2009, 2009 IEEE Conference on Technologies for Homeland Security.

[34]  Joseph Almog,et al.  Decomposition of triacetone triperoxide is an entropic explosion. , 2005, Journal of the American Chemical Society.

[35]  Y. G. Wang,et al.  Adsorption and desorption of oxygen probed from ZnO nanowire films by photocurrent measurements , 2005 .

[36]  Vladimir Dobrokhotov,et al.  Towards practicable sensors using one-dimensional nanostructures , 2008 .

[37]  H. Troy Nagle,et al.  Handbook of Machine Olfaction: Electronic Nose Technology , 2003 .

[38]  Sang Sub Kim,et al.  An approach to fabricating chemical sensors based on ZnO nanorod arrays , 2008, Nanotechnology.

[39]  Martin Feneberg,et al.  Stacking fault related 3.31-eV luminescence at 130-meV acceptors in zinc oxide , 2008 .

[40]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[41]  Shoou-Jinn Chang,et al.  Highly sensitive ZnO nanowire ethanol sensor with Pd adsorption , 2007 .

[42]  Ian H. Stevenson,et al.  Principles and mechanisms of gas sensing by GaN nanowires functionalized with gold nanoparticles , 2006 .

[43]  David N. McIlroy,et al.  Nanospring formation—unexpected catalyst mediated growth , 2004 .

[44]  Steven M. George,et al.  Growth of ZnO/Al2O3 Alloy Films Using Atomic Layer Deposition Techniques , 2003 .

[45]  V. Simakov,et al.  Variation of the conductivity of a thin film of tin dioxide in response to stepwise gas sampling , 2006 .

[46]  Ho Won Jang,et al.  One-Dimensional Oxide Nanostructures as Gas-Sensing Materials: Review and Issues , 2010, Sensors.

[47]  M. Rumyantseva,et al.  Materials for solid-state gas sensors , 2000 .

[48]  W. Paszkowicz,et al.  ZnO by ALD — Advantages of the Material Grown at Low Temperature , 2009 .

[49]  N. Bârsan,et al.  Conduction Model of Metal Oxide Gas Sensors , 2001 .

[50]  N. Yamazoe,et al.  Oxide Semiconductor Gas Sensors , 2003 .

[51]  P. K. Basu,et al.  Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals , 2009, J. Sensors.

[52]  Luca Francioso,et al.  SOLID STATE GAS SENSORS: STATE OF THE ART AND FUTURE ACTIVITIES , 2003 .

[53]  S. Basu,et al.  Improved zinc oxide film for gas sensor applications , 2002 .