Photocatalytic growth of hierarchical au needle clusters on highly active TiO2 thin film

Salih Veziroglu, Muhammad Zubair Ghori, Marius Kamp, Lorenz Kienle, Horst-Günter Rubahn, Thomas Strunskus, Jacek Fiutowski, Jost Adam, Franz Faupel , Oral Cenk Aktas

Research output: Contribution to journalJournal articleResearchpeer-review


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 (TiO2) 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 TiO2 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 TiO2 target, UV light intensity, and irradiation time.
Original languageEnglish
Article number1800465
JournalAdvanced Materials Interfaces
Issue number15
Number of pages7
Publication statusPublished - 2018


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