Premium
Gold Microplates with Well‐Defined Shapes
Author(s) -
Kan Caixia,
Wang Changshun,
Li Hongchen,
Qi Jingshan,
Zhu Jiejun,
Li Zhaosheng,
Shi Daning
Publication year - 2010
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201000600
Subject(s) - materials science , nanometre , nanostructure , nanotechnology , crystal growth , noble metal , anisotropy , crystal (programming language) , surface energy , crystallography , metal , chemical physics , chemistry , optics , composite material , physics , metallurgy , programming language , computer science
The synthesis and growth mechanism of well‐defined nanostructures are still challenging. In this study, gold microplates with starlike, shieldlike, and other polygonal shapes are successfully achieved in high yields on the basis of the polyol process. Structural studies demonstrate that these newly shaped Au plates are single‐crystalline, several micrometers in lateral size, and tens of nanometers in thickness. It is believed that the introduction of temperature variation in the early stage of crystal growth is important for these products. The newly discovered Au microplates result from the growth of the {111} plane along the 〈211〉 and other high‐index directions, in addition to the {111}‐close‐packed 〈110〉 directions. Simulations on the multiple‐twin‐induced crystal growth and surface energy are also carried out to explain the experimental observations. This work is valuable for anisotropic growth of newly shaped noble‐metal nanostructures.