Plasmonics

, Volume 7, Issue 1, pp 167–173

Seed-mediated Plasmon-driven Regrowth of Silver Nanodecahedrons (NDs)

  • Haifei Lu
  • Haixi Zhang
  • Xia Yu
  • Shuwen Zeng
  • Ken-Tye Yong
  • Ho-Pui Ho
Article

DOI: 10.1007/s11468-011-9290-8

Cite this article as:
Lu, H., Zhang, H., Yu, X. et al. Plasmonics (2012) 7: 167. doi:10.1007/s11468-011-9290-8

Abstract

We report the synthesis of silver nanodecahedrons (NDs) for extending the localized surface plasmon resonance (LSPR) of silver nanostructures from blue to green-orange (~590 nm), which will enable much wider application opportunities using common laser light sources. In our photo-assisted method, we use a light-emitting-diode (LED) to control regrowth of silver ND from precursor seeds. Highly uniform silver NDs are synthesized when the LED emission peak coincides with the LSPR peak of the seeds. A two-step process involving precursor self-transformation into silver nanoprisms and nanoplates, and subsequent photo-activated regrowth of silver NDs has been proposed. Surface-enhanced Raman scattering of silver NDs in different sizes has been studied, and the average enhancement factor for each size is estimated to be in the order of ~106.

Keywords

Localized surface plasmon resonance (LSPR)Silver nanodecahedron (AgND)Photochemical synthesisSurface-enhanced Raman scattering (SERS)

Supplementary material

11468_2011_9290_MOESM1_ESM.docx (1.6 mb)
ESM 1Extinction spectrum of white light source for the regrowth of silver NDs as well as the FESEM image of the final product, FDTD simulation results of silver ND, FESEM images for NDs in large scale and final product irradiated by 578 nm LED, and histograms showing the size distribution of silver nanodecahedrons that exhibit different extinction peaks. (DOCX 1.55 MB)

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Haifei Lu
    • 1
    • 2
  • Haixi Zhang
    • 1
    • 2
  • Xia Yu
    • 2
  • Shuwen Zeng
    • 2
    • 3
  • Ken-Tye Yong
    • 3
  • Ho-Pui Ho
    • 1
  1. 1.Department of Electronic and EngineeringThe Chinese University of Hong KongShatinPeople’s Republic of China
  2. 2.Singapore Institute of Manufacturing TechnologySingaporeSingapore
  3. 3.School of Electrical and Electronic EngineeringNanyang Technological UniversitySingaporeSingapore