Optical and electrical properties of hydrogenated yttrium nanoparticles |
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| Authors: | G Bour A Reinholdt A Stepanov C Keutgen U Kreibig |
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| Institution: | (1) I. Physikalisches Institut 1A der RWTH Aachen, D-52056 Aachen, Germany, DE |
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| Abstract: | We studied the effect of hydrogen in yttrium nanoparticles on a quartz substrate, using optical spectroscopy and electrical
resistance measurements. Pulsed laser deposition is used to obtain the Y clusters in an UHV environment. We show, that these
clusters are highly sensitive to monoatomic H1 produced from ambient hydrogen gas pressures, ranging from 10-5 to 50 mbar with our experimental arrangement. The changes of optical and electrical properties due to the chemical reaction
within the particles are sufficient to consider this material as a possible sensor for low concentrations of hydrogen.
Received 29 November 2000 |
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| Keywords: | PACS 71 30 +h Metal-insulator transitions and other electronic transitions – 73 63 Bd Nanocrystalline materials – 78 66 -w Optical properties of specific thin films |
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