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Photocatalytic Growth of Hierarchical Au Needle Clusters on Highly Active TiO 2 Thin Film
Author(s) -
Veziroglu Salih,
Ghori Muhammad Zubair,
Kamp Marius,
Kienle Lorenz,
Rubahn HorstGünter,
Strunskus Thomas,
Fiutowski Jacek,
Adam Jost,
Faupel Franz,
Aktas Oral Cenk
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800465
Subject(s) - photocatalysis , materials science , nanotechnology , pulmonary surfactant , thin film , deposition (geology) , titanium oxide , titanium , irradiation , nanoelectronics , chemical engineering , oxide , catalysis , organic chemistry , metallurgy , chemistry , engineering , paleontology , physics , sediment , nuclear physics , biology
Hierarchical gold (Au) structures with sharp edges garner a strong interest for nanoelectronics, nanoenergy harvesting devices, and nano‐biomedical applications due the exceptional strong electric field (hot spot) enhancement at their tips. Herein, a facile method to synthesize hierarchical Au needle clusters (HAuNCs) on highly active titanium oxide (TiO 2 ) thin film is reported. Different from surfactant‐directed photochemical‐assisted synthesis methods, a photocatalytic deposition approach is demonstrated, which allows positioning and patterning of HAuNCs on TiO 2 target without using any surfactant or stabilizer. This green synthesis approach enables to control the size and the geometry of deposited HAuNCs by simply altering the photocatalytic activity of TiO 2 target, UV light intensity, and irradiation time.