Surface-plasmon-mediated programmable optical nanofabrication of an oriented silver nanoplate

Bin Bin Xu, Lei Wang, Zhuo Chen Ma, Ran Zhang, Qi Dai Chen, Chao Lv, Bing Han, Xin Ze Xiao, Xu Lin Zhang, Yong Lai Zhang, Kosei Ueno, Hiroaki Misawa, Hong Bo Sun*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

We report polarized femtosecond laser-light-mediated growth and programmable assembly of photoreduced silver nanoparticles into triply hierarchical micropatterns. Formation of erected arrays of nanoplates with a thickness as small as λ/27 (λ, the writing laser wavelength) level is demonstrated. The growth mechanism of nanoplates has been clarified: (i) the excited surface plasmons enhance the local electric field and lead to spatially selective growth of silver atoms at the opposite ends of dipoles induced on early created silver seeds; (ii) the optical attractive force overcomes electrostatic repulsion in the enhanced local electric field to assemble the silver nanoparticles directly. The triply hierarchical micropattern shape and location, the nanoplate orientation, and thickness are all attained in controlled fashion.

Original languageEnglish
Pages (from-to)6682-6692
Number of pages11
JournalACS Nano
Volume8
Issue number7
DOIs
Publication statusPublished - 22 Jul 2014
Externally publishedYes

Keywords

  • SERS
  • laser nanofabrication
  • nanoplate
  • silver
  • surface plasmons

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