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Materials Processing for ZnO Stephen J. Pearton, University of Florida, DMR-0400416

Materials Processing for ZnO Stephen J. Pearton, University of Florida, DMR-0400416.

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Materials Processing for ZnO Stephen J. Pearton, University of Florida, DMR-0400416

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  1. Materials Processing for ZnOStephen J. Pearton, University of Florida, DMR-0400416 We are developing methods of processing ZnO, a very promising material for UV light emission and chemical sensing. ZnO is readily synthesized as nanorods, with lengths of a few microns and diameters of 30-100nm. The resistance of these nanorods is very sensitive to the presence of hydrogen in air and can be made more sensitive by coating them with a catalyst (Pd or Pt). We demonstrated a sensor that can detect a few ppm of hydrogen in air at room temperature. Applications include detecting leaks from hydrogen-fueled vehicles Appl.Phys.Lett. 86, 243503 (2005); 87 222106 (2005) SEM of ZnO nanorods (left) and completed sensor (right) Change in resistance of nanorods as different small amounts of hydrogen are leaked into the measuring ambient. The addition of a catalyst greatly increases the detection sensitivity.

  2. Materials Processing for ZnOStephen J.Pearton, University of Florida, DMR-0400416 Education: Two new graduate students (Rohit Khanna and Jon Wright) are involved in this project that started March 1, 2004. Another student, Kelly Ip, recently graduated with a Ph.D. and has accepted a position with Raytheon Corporation. Outreach: The PI presented several talks on “Gas and Chemical Sensors ” and designed some simple hands-on experiments for participants in which they could measure resistance of ZnO films with different stimuli Participants in the 2006 MSE Teach Program for High School Science Teachers and aides

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