title: Massively Screening the Temporal Spectra of Single Nanoparticles to Uncover the Mechanism of Nanosynthesis.
abstract: Nanosynthesis is the basis of nanotechnology and its applications. It is necessary to understand the growth mechanism of nanoparticles and the functions of growth factors. An effective way to study the synthesis is at the single nanoparticle level. This study reports a single nanoparticle spectrometer, which is based on a commercial dark-field microscopy and a group of narrowband filters. This spectrometer has many advantages, such as high light transparency (35%-75%), low cost (<$1500), massive screening (≈200 nanoplates at a time), and a high time resolution (<5 s). By using this spectrometer, the galvanic replacement reaction (GRR) is studied on single Ag nanoplates in situ and in real time. The research reveals that GRR on single Ag nanoplates has three different types according to the change of peak wavelength during reaction. Such diverse reaction types can be attributed to the different relative reaction rates of GRR on the faces and edges of Ag nanoplate with different facets. Further research shows that the relative reaction rates of different facets vary a lot under different concentrations of tri-sodium citrate. This research successfully demonstrates that the new single nanoparticle spectrometer can study the growth of single nanoparticles and the effect of growth factors.
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, 200444, China.|Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.
authors.forename: Ting
authors.initials: T
authors.lastname: He
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, 200444, China.|Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Du
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, 200444, China.|i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.
authors.forename: Pengyu
authors.initials: P
authors.lastname: Xu
authors.affiliation: Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.
authors.forename: Shaobo
authors.initials: S
authors.lastname: Xi
authors.affiliation: Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Yangbin
authors.initials: Y
authors.lastname: Shen
authors.affiliation: i-Lab, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China.
authors.forename: Weihai
authors.initials: W
authors.lastname: Ni
authors.affiliation: Department of Chemistry, Shanghai University, Shanghai, 200444, China.
authors.forename: Baohua
authors.initials: B
authors.lastname: Yue
authors.affiliation: Division of Advanced Nanomaterials, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215125, China. xczhou2013@sinano.ac.cn.|Key Laboratory of Nanodevices and Applications, Chinese Academy of Sciences, Suzhou, 215125, China. xczhou2013@sinano.ac.cn.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Zhou
keywords: galvanic replacement; massively screen; nanosynthesis; real time; single nanoparticles