【Langmuir】Synthesis and Self-Assembly of Highly Monodispersed Quasispherical Gold Nanoparticles
writer：Huang Youju; Kim Dong-Hwan*
keywords：Monodispersed Quasispherical Gold Nanoparticles
source：期刊
specific source：Langmuir 2011, 27, 13861–13867
Issue time：2011年
We report the synthesis of cetyltrimethylammonium bromide (CTAB) assisted seed mediated growth of highly pure and monodispersed quasispherical gold nanoparticles (QAuNPs) and their self-assembly on the silica/glass substrates. The seed-mediated growth approach was modified to prepare sizetunable monodispersed QAuNPs with sizes ranging from 20 to 150 nm. The larger, more uniform seeds and lower CTAB concentration resulted in the formation of relatively large QAuNPs with improved monodispersity (relative standard deviation (RSD) of ～58%) and high purity in their shapes. In addition, CATB-capped QAuNPs can be spontaneously assembled into closely packed and highly aligned superstructures with well-defined mutillayers (two to six layers) on silica substrates. Furthermore, CATB-capped QAuNPs can easily construct density-controllable QAuNP chips by electrostatic self-assembly, showing their promising applications for singlenanoparticle plasmonic sensors.