Berlin 2012 – scientific programme
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AKE: Arbeitskreis Energie
AKE 13: Erneuerbare Energie: Solarenergie und Integration
AKE 13.3: Talk
Wednesday, March 28, 2012, 17:30–17:45, EW 201
Research of photocatalytic mechanism using tunable metal/semiconductor nanosized heterostructures — Zhibing Zhan1,2, Ranjith Vellacheri1,2, Liaoyong Wen1,2, Huaping Zhao1,2, and •Yong Lei1,2 — 1Fachgebiet 3D-Nanostrukturierung, Institut für Physik & Zentrum für Mikro- und Nanotechnologien (ZIK MacroNano), Technische Universität Ilmenau, 98693 Ilmenau, Germany. — 2Institut für MaterialPhysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
Highly ordered metal nanodots were synthesized on semiconductor ZnO single crystals using ultrathin alumina membranes (UTAMs) as masks. The dimensions of the metal nanodots have been precisely tuned by the diameters of the pores in UTAMs. Electrical measurements illuminated the types of the nanosized heterostructures between the metal nanodots and ZnO single crystal substrates. Photocatalytic researches further indicated that the kinds and dimensions of the metal nanodots determined the light conversion efficiency of the heterostructures. By optimizing the parameters of the metal nanodots, light conversion efficiency could be enhanced significantly. This work clarified some crucial issues of improving the light conversion efficiency using nanosized heterostructures, which provide guidance for future design of novel metal/semiconductor heterostructures.