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Morphology, luminescence, and electrical resistance response to H2 and CO gas exposure of porous InP membranes prepared by electrochemistry in a neutral electrolyte |
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| Authors: | O. Volciuc M. Enachi D. Pavlidis I.M. Tiginyanu |
| Affiliation: | a National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, Chisinau 2004, Moldavia b Institute of Applied Physics, Academy of Sciences of Moldova, Academy str. 5, Chisinau 2028, Moldavia c Fachgebiet für Höchstfrequenzelektronik, Technische Universität Darmstadt, Merckstraße 25, Darmstadt 64283, Germany d Institute of Electronic Engineering and Nanotechnologies, Academy of Sciences of Moldova, Academy str. 3/3, Chisinau 2028, Moldavia |
| Abstract: | Porous InP membranes have been prepared by anodization of InP wafers with electron concentration of 1 × 1017 cm−3 and 1 × 1018 cm−3 in a neutral NaCl electrolyte. The internal surfaces of pores in some membranes were modified by electrochemical deposition of gold in a pulsed voltage regime. Photoluminescence and photosensitivity measurements indicate efficient light trapping and porous surface passivation. The photoluminescence and electrical resistivity of the membranes are sensitive to the adsorption of H2 and CO gas molecules. These properties are also influenced by the deposition of Au nanoparticles inside the pores. |
| Keywords: | Porous InP Au nanoparticles Anodization Electroplating Photoluminescence Gas adsorption |
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