Gold cluster coatings enhancing Raman scattering from surfaces: Ink analysis and document identification

Zhixun Luo, Jordan C. Smith, Trevor M. Goff, James H. Adair, A. W. Castleman

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Based on the method of laser-ablation in liquids (LAL) with a strategy of bubbling nitrogen through a custom-made chamber, we prepared chemically-pure gold clusters which were found to be metastable for an extensive period of time beyond months. A practical use of discrimination among different surfaces is demonstrated here by applying the gold clusters as surface coatings which result in surface-enhanced Raman scattering (SERS) due to the surface plasmon resonance (SPR). This technique identifies various documents from different printers/copiers and written with different pen-inks. The stable and additive-free gold clusters enable repetitive examinations without impurity interference.

Original languageEnglish (US)
Pages (from-to)73-78
Number of pages6
JournalChemical Physics
Volume423
DOIs
StatePublished - Jan 1 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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