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

Autor:	A. W. Castleman, Zhixun Luo, James H. Adair, Jordan C. Smith, Trevor M. Goff
Rok vydání:	2013
Předmět:	symbols.namesake Gold cluster Interference (communication) Inkwell Impurity Chemistry Metastability symbols General Physics and Astronomy Nanotechnology Physical and Theoretical Chemistry Surface plasmon resonance Raman scattering
Zdroj:	Chemical Physics. 423:73-78
ISSN:	0301-0104
DOI:	10.1016/j.chemphys.2013.06.021
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0053d2914f07361b5c7d956d609237b9 https://doi.org/10.1016/j.chemphys.2013.06.021 Zobrazit plný text záznamu Full Text from ScienceDirect