Core–shell nanoheterodimers: laser-assisted deposition of single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots on TiO<sub>2</sub> nanoparticles - Archive ouverte HAL Access content directly
Journal Articles Materials Advances Year : 2023

Core–shell nanoheterodimers: laser-assisted deposition of single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots on TiO2 nanoparticles

Abstract

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
Fichier principal
Vignette du fichier
2023-014.pdf (5.67 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-03952671 , version 1 (23-01-2023)

Identifiers

Cite

Fenghuan Zhao, Qingguo Bai, Chenghui Xia, Junjie Hao, Marion Gayot, et al.. Core–shell nanoheterodimers: laser-assisted deposition of single bimetallic Au@M (M = Au, Ag, Pd, Pt) nanodots on TiO2 nanoparticles. Materials Advances, 2023, 4 (2), pp.694-708. ⟨10.1039/d2ma01018f⟩. ⟨hal-03952671⟩
27 View
3 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More