Design and performance of a simple, room-temperature Ga2O3 nanowire gas sensor

Arnold, S. P.; Prokes, S. M.; Perkins, F. K.; Zaghloul, M. E.
September 2009
Applied Physics Letters;9/7/2009, Vol. 95 Issue 10, p103102
Academic Journal
Ga2O3 nanowire gas sensors were fabricated using the vapor-liquid-solid method of nanowire growth over platinum interdigitated electrodes. While cheaply and easily fabricated, the sensors are capable of detecting various analytes at room temperature. As analyte is adsorbed onto the nanowire surfaces, a change in the device capacitance is measured. Fast recovery of the sensing devices, without the use of an external heat source, allows these devices to operate at low power. Capacitance is seen to increase following a Freundlich isotherm in response to increasing concentrations of analyte vapors.


Related Articles

  • Maskless electrodeposited contact for conducting polymer nanowires. Hangarter, Carlos M.; Bangar, Mangesh; Hernandez, Sandra C.; Chen, Wilfred; Deshusses, Marc A.; Mulchandani, Ashok; Myung, Nosang V. // Applied Physics Letters;2/18/2008, Vol. 92 Issue 7, p073104 

    This letter reports a simple and scalable method to create mechanical joints and electrical contacts of conducting polymer nanowires to electrodes by selective maskless metal electrodeposition on electrodes. This is an attractive route for contacting nanowires as it bypasses harsh processing...

  • A Compact Low Cost Wearable Sensor System for Quantitative Gait Measurement. Ming-GuiTan; Cheng-Boon Leong; Jee-Hou Ho; Hui-Ting Goh; Hoon-Kiat Ng // Applied Mechanics & Materials;2014, Issue 627, p212 

    The demand for quantitative gait analysis increases due to increasing number of neurological disorder patients. Conventional gait analysis tools such as 3D motion capture systemsare relatively expensive. Therefore, there is a need to develop a low cost sensor system to obtain the spatial...

  • Back-side illuminated Ga0.47In0.53As photoconductive detectors and associated dark zones. Chen, C. Y.; Cox, H. M.; Garbinski, P. A.; Hummel, S. G. // Applied Physics Letters;1984, Vol. 45 Issue 8, p867 

    We report the first back-side illuminated Ga0.47In0.53As photoconductive detector. The scheme of back-side illumination has led to an improvement of 1.5 dB in responsivity over front-side illumination. Furthermore, we observed dark zones where responsivities showed a minimum in the vicinity of...

  • Coordinate accuracy of mini-drift tubes in detection of an induced signal. Abazov, V. M.; Alexeev, G. D.; Davydov, Yu. I.; Malyshev, V. L.; Piskun, A. A.; Tokmenin, V. V. // Instruments & Experimental Techniques;Sep2010, Vol. 53 Issue 5, p648 

    The coordinate accuracy of mini-drift tubes was measured by detecting the signal induced on their external electrodes. The electrodes (1-cm-wide strips) located perpendicularly to the anode wires were used to determine the particle coordinate. The rms coordinate accuracy of ∼0.4 mm was...

  • Fabrication and Applications of Nanoparticle-Modified Electrodes in Stripping Analysis. Jones, Sarah E. Ward; Compton, Richard G. // Current Analytical Chemistry;Jul2008, Vol. 4 Issue 3, p177 

    In recent years significant work had been carried out on the fabrication and application of nanoparticle-modified electrodes for trace heavy metal detection with the view to producing sensitive and versatile sensors. Much has focused on the use of gold nanoparticles for the detection of arsenic...

  • OXYGEN SENSOR WITH ADVANCED OXIDE ELECTRODE MATERIALS. Shuk, P.; Jantz, R.; Guth, H.-U. // International Journal on Smart Sensing & Intelligent Systems;Mar2012, Vol. 5 Issue 1, p233 

    Calcium doped lanthanum and yttrium manganite electrode materials with oxygen deficiency and low polarization resistance (<30W*cm2 at 600°C) were tested in new advanced electrochemical sensor for the oxygen measurements. Oxygen sensor with oxide electrodes was showing fast response...

  • Field-emission-induced growth of nanowire between electrodes. Yeong, K. S.; Law, J. B. K.; Thong, J. T. L. // Applied Physics Letters;5/8/2006, Vol. 88 Issue 19, p193116 

    We demonstrate the growth of a tungsten nanowire between two microtip electrodes by the field-emission-induced growth process. A nanowire is grown from the cathode towards the opposing biased anode in a quasicontinuous manner. In order to study the nanowire growth process, the wire is grown in a...

  • Enhanced voltage-current characteristics of GaN nanowires treated by a selective reactive ion etching. Jeon, D. Y.; Kim, K. H.; Park, S. J.; Huh, J. H.; Kim, H. Y.; Yim, C. Y.; Kim, G. T. // Applied Physics Letters;7/10/2006, Vol. 89 Issue 2, p023108 

    In characterizing the electrical properties of individual NWs (nanowires), the amorphous oxide layer on the surface of NWs is known to limit the electrical conductivity owing to the contact barriers between metal electrodes and NWs. To remove the native oxide layer, a systematic reactive ion...

  • Fabrication of Ga2O3/SnO2 core-shell nanowires and their ethanol gas sensing properties. Yun-Guk Jang; Won-Sik Kim; Dai-Hong Kim; Seong-Hyeon Hong // Journal of Materials Research;9/14/2011, Vol. 26 Issue 17, p2322 

    Ga2O3/SnO2core-shell nanowires were synthesized by combining thermal evaporation and atomic layer deposition (ALD), and nanowire network sensors were fabricated by directly depositing them on the substrate with interdigitated Pt electrodes. Crystalline Ga2O3 nanowires of ~20 nm diameter were...


Read the Article


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

Try another library?
Sign out of this library

Other Topics