The Morphological Change of Silver Nanoparticles in Water

The solvent-induced morphological change of silver nanoparticles is studied with a combination of optical spectroscopy and atomic force microscopy (AFM). By using the local surface piasmon resonance (LSPB) spectroscopy arising from Ag nanoparticles, an in-situ investigation of the spectral changes i...

Full description

Saved in:
Bibliographic Details
Published in:Chinese physics letters 2012-01, Vol.29 (1), p.17805-1-017805-3
Main Authors: Wang, Peng, Wang, Rong-Yao, Jin, Jing-Yang, Xu, Le, Shi, Qing-Fan
Format: Article
Language:English
Subjects:
Atomic force microscopy
Contact
Dielectrics
Islands
Nanoparticles
Silver
Spectra
Spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The solvent-induced morphological change of silver nanoparticles is studied with a combination of optical spectroscopy and atomic force microscopy (AFM). By using the local surface piasmon resonance (LSPB) spectroscopy arising from Ag nanoparticles, an in-situ investigation of the spectral changes is carried out before, during and after exposure of Ag island films to water. Combining with the morphological observations by AFM, we sort out the morphological and dielectric contributions to the water-induced LSPB changes. Our results demonstrate that a slight morphological change induced by water contact can result in an apparent blue shift of the LSPB spectral maximum. Furthermore, it is found that this structural change leads to a higher sensitivity of the Ag island films in response to the change in the external dielectric environment. This solvent-induced morphological change, and consequently the modification of the LSPR of the metal nanoparticles, may have significant impact in the applications of solvent-involved piasmon sensors, such as chemicai/hioiogicai sensing and singie-molecule spectroscopy.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/29/1/017805