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Surfactant‐Free Sub‐2 nm Ultrathin Triangular Gold Nanoframes
Author(s) -
Shahjamali Mohammad Mehdi,
Bosman Michel,
Cao Shaowen,
Huang Xiao,
Cao Xiehong,
Zhang Hua,
Pramana Stevin Snellius,
Xue Can
Publication year - 2013
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.201300200
Subject(s) - materials science , nanotechnology , surface plasmon resonance , etching (microfabrication) , galvanic cell , deposition (geology) , plasmon , pulmonary surfactant , chemical engineering , layer (electronics) , nanoparticle , optoelectronics , metallurgy , paleontology , sediment , engineering , biology
Ultrathin triangular gold nanoframes are synthesized in high yield through selective gold deposition on the edges of triangular silver nanoprisms and subsequent silver etching with mild wet etchants. These ultrathin gold nanoframes are surfactant‐free with tailorable ridge thickness from 1.8 to 6 nm and exhibit adjustable and distinct surface plasmon resonance bands in the visible and near‐IR region. In comparison, etching of the nanoprism template by galvanic replacement can only create frame structures with much thicker ridges, which have much lower catalytic activity for 4‐nitrophenol reduction than the ultrathin gold nanoframes.