TY - JOUR
T1 - Asymmetric Dimers Can Be Formed by Dewetting Half-Shells of Gold Deposited on the Surfaces of Spherical Oxide Colloids
AU - Lu, Yu
AU - Xiong, Hui
AU - Jiang, Xuchuan
AU - Xia, Younan
AU - Prentiss, Mara
AU - Whitesides, George M.
PY - 2003/10/22
Y1 - 2003/10/22
N2 - Asymmetric dimers consisting of gold microcrystals and spherical silica colloids have been fabricated by depositing thin films of gold onto the spherical colloids to form half-shells, followed by annealing at elevated temperatures. The capability and feasibility of this procedure have been demonstrated with silica and titania beads of 0.2-2 μm in diameter and γ-Fe2O3/polystyrene@SiO2 core-shell particles 0.5 μm in size. The dimensions of gold microcrystals could be conveniently varied in the range of 100-650 nm by controlling the thickness of gold films and/or the diameter of the spherical colloids. This method provides another route to asymmetric dimers made of colloidal particles that could be different in size, chemical composition, surface functionality, density or sign of surface charge, bulk property, or a combination of these properties.
AB - Asymmetric dimers consisting of gold microcrystals and spherical silica colloids have been fabricated by depositing thin films of gold onto the spherical colloids to form half-shells, followed by annealing at elevated temperatures. The capability and feasibility of this procedure have been demonstrated with silica and titania beads of 0.2-2 μm in diameter and γ-Fe2O3/polystyrene@SiO2 core-shell particles 0.5 μm in size. The dimensions of gold microcrystals could be conveniently varied in the range of 100-650 nm by controlling the thickness of gold films and/or the diameter of the spherical colloids. This method provides another route to asymmetric dimers made of colloidal particles that could be different in size, chemical composition, surface functionality, density or sign of surface charge, bulk property, or a combination of these properties.
UR - http://www.scopus.com/inward/record.url?scp=0142072613&partnerID=8YFLogxK
U2 - 10.1021/ja0373014
DO - 10.1021/ja0373014
M3 - Article
AN - SCOPUS:0142072613
SN - 0002-7863
VL - 125
SP - 12724
EP - 12725
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 42
ER -