期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 251, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2020.119408
关键词
surface-enhanced Raman scattering (SERS); gold nanoparticles; cetyltrimethylammonium bromide (CTAB); hydroxyanthraquinones; 1,2-dihydroxyanthraquinone (alizarin)
类别
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2018R1A2B6001699, 2020R1A5A1019141, 2020R1F1A1048450]
- GIST Research Institute (GRI) - GIST
- National Research Foundation of Korea [2020R1F1A1048450, 2018R1A2B6001699] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Gold nanosurfaces are widely used for surface-enhanced Raman spectroscopy (SERS) detection in biological systems. By introducing CTAB-aggregated AuNPs, efficient surface adsorption and strong SERS enhancement for a variety of HAQs, especially alizarin, were achieved. The CTAB-modified AuNPs are considered efficient SERS substrates for many biological molecules with weak surface adsorption.
Gold nanosurfaces are widely applied to the surface-enhanced Raman spectroscopy (SERS) detection of the biological systems. The surface modification of gold nanoparticles (AuNPs) is often required when the analytes do not efficiently adsorb on the surface. In this paper, an aggregation of AuNPs with cetyltrimethylammonium bromide (CTAB) was introduced for the efficient surface adsorption and strong SERS enhancement for a number of hydroxyanthraquinones (HAQs). The SERS of HAQs including 1,2-dihydroxyanthraquinone (alizarin) were strongly enhanced with CTAB-modified AuNPs and deprotonation of alizarin was clearly observed upon the pH change. The CTAB-modified AuNPs are regarded as efficient SERS substrates for many biological molecules with weak surface adsorption. (C) 2020 Elsevier B.V. All rights reserved.
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