Highly sensitive ZnO nanowire CO sensors with the adsorption of Au nanoparticles

In this study, the growth of high density single-crystalline ZnO nanowires on patterned ZnO:Ga/SiO(2)/Si templates was reported. We also adsorbed Au nanoparticles onto nanowire surfaces and fabricated ZnO nanowire CO sensors. With 50 ppm CO gas, it was found that we could enhance the device sensitivities at 350 °C from 4.2% to 46.5% by the adsorption of Au nanoparticles. It was also found that measured sensitivities were around 30%, 37%, 46.5% and 53% when concentration of the injected CO gas was 5, 20, 50 and 100 ppm, respectively.

[1]  Nitin Kumar,et al.  Fabrication of optically enhanced ZnO nanorods and microrods using novel biocatalysts. , 2005, Journal of Nanoscience and Nanotechnology.

[2]  S. Seal,et al.  Nanocrystalline SnO gas sensors in view of surface reactions and modifications , 2002 .

[3]  Norio Miura,et al.  Development of gas sensors for environmental protection , 1995 .

[4]  V. Varadarajan,et al.  Site-specific growth of Zno nanorods using catalysis-driven molecular-beam epitaxy , 2002 .

[5]  G. Ramanath,et al.  ZnO nanowires by pulsed laser vaporization: synthesis and properties. , 2005, Journal of nanoscience and nanotechnology.

[6]  I-Cherng Chen,et al.  ZnO nanowire-based CO sensors prepared on patterned ZnO:Ga/SiO2/Si templates , 2007 .

[7]  D. Kohl.  The role of noble metals in the chemistry of solid-state gas sensors , 1990 .

[8]  K. Hwang,et al.  Effect of annealing titanium on in vitro bioactivity , 2003, Journal of materials science. Materials in medicine.

[9]  J. Morante,et al.  Gas-Sensing Properties of Sprayed Films of (CdO) (ZnO) Mixed Oxide , 2005 .

[10]  Min-Hsiung Hon,et al.  The effects of thickness and operation temperature on ZnO:Al thin film CO gas sensor , 2002 .

[11]  Chien-Tsung Wang,et al.  ZnO nanoparticle-modified infrared internal reflection elements for selective detection of volatile organic compounds. , 2006, Analytical chemistry.

[12]  Eicke R. Weber,et al.  Catalytic Growth of Zinc Oxide Nanowires by Vapor Transport , 2001 .

[13]  Yongxiang Li,et al.  Fabrication of highly ordered ZnO nanowire arrays in anodic alumina membranes , 2000 .

[14]  P. P. Sahay,et al.  Zinc oxide thin film gas sensor for detection of acetone , 2005 .

[15]  Yicheng Lu,et al.  Selective MOCVD growth of ZnO nanotips , 2003 .

[16]  Gian Carlo Cardinali,et al.  Gas sensors for air quality monitoring: realisation and characterisation of undoped and noble metal-doped SnO2 thin sensing films deposited by the pulsed laser ablation , 1999 .

[17]  A. Cirera,et al.  Gas-sensing properties of sprayed films of (CdO)/sub x/(ZnO)/sub 1-x/ mixed oxide , 2005, IEEE Sensors Journal.

[18]  S. Phanichphant,et al.  Effects of Palladium Loading on the Response of a Thick Film Flame-made ZnO Gas Sensor for Detection of Ethanol Vapor , 2007, Sensors (Basel, Switzerland).

[19]  Xinghui Wu,et al.  Preparation and gas-sensing properties of perovskite-type SrFeO3 oxide , 2001 .

[20]  S. K. Hazra,et al.  Hydrogen sensitivity of ZnO p-n homojunctions , 2006 .

[21]  J. Morante,et al.  Micromachined twin gas sensor for CO and O2 quantification based on catalytically modified nano-SnO2 , 2006 .

[22]  Claude Lucat,et al.  Critical review of nitrogen monoxide sensors for exhaust gases of lean burn engines , 2000 .

[23]  C. Xie,et al.  Synthesis and gas sensitivity of In-doped ZnO nanoparticles , 2003 .

[24]  Carles Cané,et al.  A novel single chip thin film metal oxide array , 2003 .

[25]  G. Meng,et al.  Ordered semiconductor ZnO nanowire arrays and their photoluminescence properties , 2000 .

[26]  S. A. Patil,et al.  Modified zinc oxide thick film resistors as NH3 gas sensor , 2006 .

[27]  L. Vayssieres.  Growth of Arrayed Nanorods and Nanowires of ZnO from Aqueous Solutions , 2003 .

[28]  Partha Mitra,et al.  ZnO thin film sensor , 1998 .

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

[30]  Philippe Menini,et al.  CO response of a nanostructured SnO2 gas sensor doped with palladium and platinum , 2004 .

[31]  S. Chang,et al.  A novel method for the formation of ladder-like ZnO nanowires , 2006 .

[32]  S. Chang,et al.  ZnO Nanowire-Based CO Sensors Prepared at Various Temperatures , 2007 .