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Author

Shin, Hyeon Suk
Lab for Nanomaterials and Nanoanalysis(LNN)
Research Interests
  • Two-dimensional materials, graphene, transition metal dichalcogenides, h-BN, heterostructure

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Surface-Enhanced Raman Scattering of Single- and Few-Layer Graphene by the Deposition of Gold Nanoparticles

Cited 56 times inthomson ciCited 48 times inthomson ci
Title
Surface-Enhanced Raman Scattering of Single- and Few-Layer Graphene by the Deposition of Gold Nanoparticles
Author
Lee, JisookShim, SangdeokKim, BongsooShin, Hyeon Suk
Keywords
Au nanoparticle; Average SER; Gold Nanoparticles; Induced defects; Multiple reflections; Raman Spectrum; Scan images; SERS enhancement; SERS spectrum; Si substrates; Single layer; Surface-enhanced Raman scattering; Transparent glass
Issue Date
201102
Publisher
WILEY-BLACKWELL
Citation
CHEMISTRY-A EUROPEAN JOURNAL, v.17, no.8, pp.2381 - 2387
Abstract
Surface-enhanced Raman scattering (SERS) of graphene on a SiO(2)(300 nm)/Si substrate was investigated by depositing Au nanoparticles using thermal evaporation. This provided a maximum enhancement of 120 times for single-layer graphene at 633 nm excitation. SERS spectra and scan images of single-layer and few-layer graphene were acquired. Single-layer graphene provides much larger SERS enhancement compared to few-layer graphene, while in single-layer graphene the enhancement of the G band was larger than that of the 2D band. Furthermore, the D bands were identified in the SERS spectra; these bands were not observed in a normal Raman spectrum without Au deposition. Appearance of the D band is ascribed to the considerable SERS enhancement and not to an Au deposition-induced defect. Lastly, SERS enhancement of graphene on a transparent glass substrate was compared with that on the SiO(2)(300 nm)/Si substrate to exclude enhancement by multiple reflections between the Si substrate and deposited Au nanoparticles. The contribution of multiple reflections to total enhancement on the SiO(2)(300 nm)/Si substrate was 1.6 times out of average SERS enhancement factor, 71 times.
URI
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DOI
http://dx.doi.org/10.1002/chem.201002027
ISSN
0947-6539
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