Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 29: Nanostructures at Surfaces III: Dots, Particles, and Clusters

O 29.7: Vortrag

Dienstag, 2. April 2019, 12:00–12:15, H25

Template-Guided Programmable Janus Heteronanostructure Arrays for Efficient Plasmonic Photocatalysis — •Zhiqiang Zeng, Rui Xu, and Yong Lei — Institut für Physik & IMN MacroNano* (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, Germany

Abstract: Janus heteronanostructures (HNs) could facilitate synergistic coupling of diverse functions inherited by their comprised nanocomponents. Nowadays, synthesizing deterministically targeted Janus HNs remains a challenge. Here, a general yet scalable technique is utilized to fabricate an array of programmable Janus HNs based on binary-pore anodic aluminum oxide templates. The binary-pore anodic aluminum oxide templates provide high degrees of design freedom for both nanocomponents of the Janus HNs, including morphologies, compositions, dimensions, and interfacial junctions. Arrays of TiO2-Au and TiO2/Pt NPs-Au Janus HNs are prepared and demonstrated about 2.2 times photocurrent density and 4.6 times hydrogen evolution rate of that obtained from their TiO2 counterparts. The enhancement was mainly due to localized surface plasmon resonance induced direct hot electron injection and strong plasmon resonance energy transfer near the interfaces of TiO2 nanotubes and Au nanorods. This study may represent a promising step forward to pursue customized Janus HNs, leading to novel physicochemical effects and device applications.