Nanospheres of silver nanoparticles: agglomeration, surface morphology control and application as SERS substrates
- 30 June 2009
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 11 (34), 7450-7454
- https://doi.org/10.1039/b904712c
Abstract
This paper reports a high-yield synthesis of Ag nanospheres made up of primary nanoparticles. The size of the silver nanospheres can be controlled by changing the concentration of poly(vinylpyrrolidone) (PVP) which acts as a stabilizer. In addition, the surface morphology of the nanospheres can be well controlled through controlling the shape of primary Ag nanoparticles by introducing a small quantity of ionic capping agents in the solution. Different surface morphologies of Ag nanospheres lead to different surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS) properties. The SERS property of the nanospheres used as substrates is very sensitive to the nanoscale characteristics of the surfaces, and the nanospheres with sharp tips on their surface exhibit much better Raman scattering enhancement than non-agglomerated spherical Ag nanoparticles.Keywords
This publication has 31 references indexed in Scilit:
- Shape Control of Colloidal Metal NanocrystalsSmall, 2008
- High‐Yield Synthesis of Single‐Crystalline Gold Nano‐octahedraAngewandte Chemie, 2007
- Tuning plasmons on nano-structured substrates for NIR-SERSPhysical Chemistry Chemical Physics, 2006
- One-Dimensional Colloidal Gold and Silver NanostructuresInorganic Chemistry, 2006
- Polyhedral Silver Nanocrystals with Distinct Scattering SignaturesAngewandte Chemie, 2006
- Surface-enhanced Raman scattering from transition metals with special surface morphology and nanoparticle shapeFaraday Discussions, 2005
- Aspect ratio dependence on surface enhanced Raman scattering using silver and gold nanorod substratesPhysical Chemistry Chemical Physics, 2005
- Optical Properties of Metal Nanoparticles with Arbitrary ShapesThe Journal of Physical Chemistry B, 2003
- Shape-Controlled Synthesis of Gold and Silver NanoparticlesScience, 2002
- Some Interesting Properties of Metals Confined in Time and Nanometer Space of Different ShapesAccounts of Chemical Research, 2001