A tunable Au core–Ag shell nanoparticle tip for tip-enhanced spectroscopy. Issue 17 (29th February 2016)

• Record Type: Journal Article
• Authors: Kim, Woong; Kim, Nara; Lee, Eunbyoul; Kim, Duckhoe; Hwan Kim, Zee; Won Park, Joon
• Is Part Of: Analyst. Volume 141:Issue 17(2016)
• Page Start: 5066
• Page End: 5070
• Publication Date: 2016-02-29
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c6an00035e
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : A single Au nanoparticle (NP) with a diameter of 5 nm was transferred to the end of a Si-tip through a picking process, and an Ag shell with a controlled thickness was formed on the Au core. Abstract : A single Au nanoparticle (NP) with a diameter of 5 nm was transferred to the end of a Si-tip through a picking process, and an Ag shell with a controlled thickness was formed on the Au core. By carrying out tip-enhanced Raman scattering (TERS) measurements on biphenyl-4-thiol (BPT) with the Au@Ag NP–tip (overall diameter of 22–60 nm), we confirm that such tips show a plasmonic local-field enhancement which is sufficient for tip-enhanced spectro-microscopy.