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Recent Findings from Tohoku University Has Provided New Information about Clinical Trials and Studies (Comparative study of Schottky diode type...

July 21, 2014



Recent Findings from Tohoku University Has Provided New Information about Clinical Trials and Studies (Comparative study of Schottky diode type hydrogen sensors based on a honeycomb GaN nanonetwork and on a planar GaN film)

By a News Reporter-Staff News Editor at Clinical Trials Week -- A new study on Clinical Research is now available. According to news reporting from Miyagi, Japan, by NewsRx journalists, research stated, "We demonstrate Schottky diode type hydrogen (H-2) sensors both on a planar GaN film grown by Metal Organic Chemical Vapor Deposition and on a honeycomb GaN nanonet-work grown by Molecular Beam Epitaxy. The metal-semiconductor Pt/planar GaN film Schottky diode was fabricated and used as a H-2 sensor element with response time tau of 80s (10,000 ppm) and 2000 ppm limit of detection for hydrogen gas (LODH2) at 373 K. A significant improvement in H-2 detection is observed for the honeycomb GaN nanonetwork."

The news correspondents obtained a quote from the research from Tohoku University, "The characteristics of the H-2 sensor on the honeycomb GaN nanonetwork are quantitatively studied in comparison with that on the planar GaN film. The response time tau is shortened by a factor of 27 (3 s versus 80 s) and the LODH2 is lowered by two orders of magnitude, from 2000 to 50 ppm. Moreover, the operating temperature could be reduced to room temperature. Through analyzing the transient-state, we observed a reduction of activation energy E-a from 6.22 to 2.4 kcal/mol."

According to the news reporters, the research concluded: "The reduced activation energyE(a) is regarded as the reason that leads to a superior H-2 detection of the honeycomb GaN nanonetwork in terms of response time tau and operating temperature."

For more information on this research see: Comparative study of Schottky diode type hydrogen sensors based on a honeycomb GaN nanonetwork and on a planar GaN film. International Journal of Hydrogen Energy, 2014;39(16):8564-8575. International Journal of Hydrogen Energy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; International Journal of Hydrogen Energy - www.elsevier.com/wps/product/cws_home/485)

Our news journalists report that additional information may be obtained by contacting A.H. Zhong, Tohoku University, Dept. of Nanomech, Sendai, Miyagi 9808579, Japan. Additional authors for this research include T. Sasaki and K. Hane (see also Clinical Research).

Keywords for this news article include: Asia, Japan, Gases, Miyagi, Elements, Hydrogen, Clinical Research, Inorganic Chemicals, Clinical Trials and Studies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Clinical Trials Week


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