ZHAO, Fenghuan; BAI, Qingguo; XIA, Chenghui; HAO, Junjie; GAYOT, Marion; DELVILLE, Jean-Pierre; DELVILLE, Marie-Helene

doi:10.1039/d2ma01018f

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ZHAO, Fenghuan
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

BAI, Qingguo
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

XIA, Chenghui
Ocean University of China [OUC]

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Materials Advances. 2023, vol. 4, n° 2, p. 694-708

Royal Society of Chemistry

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We propose to synthesize well-controlled core-shell nanoheterodimers (NHDs) based on single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots (BNDs) grown on bare TiO 2 nanoparticles (NPs) by a two-step laser-assisted deposition. The high photon flux emitted by a focused UV laser triggers nucleation and growth of a single core nanodot (ND) and its size is quantitatively controlled by varying the time exposure and the concentration of gold ions in the solution in the first step. A second laser deposition is performed after adding a new metal precursor to the Au-TiO 2 NHDs thus prepared. Due to the vectorial nature of the first Au-TiO 2 NHDs when photo-excited, and thus the subsequent efficient carrier separation, the second photodeposition strictly takes place on the first gold NDs. Growth is epitaxial for both< Réduire

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Core–shell nanoheterodimers: laser-assisted deposition of single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots on TiO<sub>2</sub> nanoparticles

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