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Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species.
Anal Chim Acta. 2014 Jan 02; 806:188-96.AC

Abstract

Because Ag and Au nanoparticles (NPs) possess well-defined localized surface plasmon resonance (LSPR) they are popularly employed in the studies of surface-enhanced Raman scattering (SERS). As shown in the literature and in our previous studies, the advantage of SERS-active Ag NPs is their higher SERS enhancement over Au NPs. On the other hand, the disadvantage of SERS-active Ag NPs compared to Au NPs is their serious decay of SERS enhancement in ambient laboratory air. In this work, we develop a new strategy for preparing highly SERS-active Ag NPs deposited on a roughened Au substrate. This strategy is derived from the modification of electrochemical underpotential deposition (UPD) of metals. The coverage of Ag NPs on the roughened Au substrate can be as high as 0.95. Experimental results indicate that the SERS of Rhodamine 6G (R6G) observed on this developed substrate exhibits a higher intensity by ca. 50-fold of magnitude, as compared with that of R6G observed on the substrate without the deposition of Ag NPs. The limit of detection (LOD) for R6G measured on this substrate is markedly reduced to 2×10(-15)M. Moreover, aging of SERS effect observed on this developed substrate is significantly depressed, as compared with that observed on a generally prepared SERS-active Ag substrate. These aging tests were performed in an atmosphere of 50% relative humidity (RH) and 20% (v/v) O2 at 30°C for 60 day. Also, the developed SERS-active substrate enables it practically applicable in the trace detection of monosodium urate (MSU)-containing solution in gouty arthritis without a further purification process.

Authors+Show Affiliations

Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan; School of Dentistry, College of Oral Medicine, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan; Research Center for Biomedical Devices, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan.General Education Center, Vanung University, No. 1, Van Nung Road, Chung-Li City, Taiwan.Department of Biochemistry, School of Medicine, College of Medicine, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan; Biomedical Mass Imaging Research Center, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan. Electronic address: liuyc@tmu.edu.tw.Department of Materials Science and Engineering, Vanung University, No. 1, Van Nung Road, Chung-Li City, Taiwan.School of Dentistry, College of Oral Medicine, Taipei Medical University, No. 250, Wu-Hsing Street, Taipei 11031, Taiwan.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24331055

Citation

Ou, Keng-Liang, et al. "Silver Overlayer-modified Surface-enhanced Raman Scattering-active Gold Substrates for Potential Applications in Trace Detection of Biochemical Species." Analytica Chimica Acta, vol. 806, 2014, pp. 188-96.
Ou KL, Hsu TC, Liu YC, et al. Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species. Anal Chim Acta. 2014;806:188-96.
Ou, K. L., Hsu, T. C., Liu, Y. C., Yang, K. H., & Tsai, H. Y. (2014). Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species. Analytica Chimica Acta, 806, 188-96. https://doi.org/10.1016/j.aca.2013.11.034
Ou KL, et al. Silver Overlayer-modified Surface-enhanced Raman Scattering-active Gold Substrates for Potential Applications in Trace Detection of Biochemical Species. Anal Chim Acta. 2014 Jan 2;806:188-96. PubMed PMID: 24331055.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silver overlayer-modified surface-enhanced Raman scattering-active gold substrates for potential applications in trace detection of biochemical species. AU - Ou,Keng-Liang, AU - Hsu,Ting-Chu, AU - Liu,Yu-Chuan, AU - Yang,Kuang-Hsuan, AU - Tsai,Hui-Yen, Y1 - 2013/11/22/ PY - 2013/09/02/received PY - 2013/11/07/revised PY - 2013/11/14/accepted PY - 2013/12/17/entrez PY - 2013/12/18/pubmed PY - 2014/8/1/medline KW - Coverage KW - Monosodium urate KW - Stability KW - Surface-enhanced Raman scattering KW - Underpotential deposition SP - 188 EP - 96 JF - Analytica chimica acta JO - Anal Chim Acta VL - 806 N2 - Because Ag and Au nanoparticles (NPs) possess well-defined localized surface plasmon resonance (LSPR) they are popularly employed in the studies of surface-enhanced Raman scattering (SERS). As shown in the literature and in our previous studies, the advantage of SERS-active Ag NPs is their higher SERS enhancement over Au NPs. On the other hand, the disadvantage of SERS-active Ag NPs compared to Au NPs is their serious decay of SERS enhancement in ambient laboratory air. In this work, we develop a new strategy for preparing highly SERS-active Ag NPs deposited on a roughened Au substrate. This strategy is derived from the modification of electrochemical underpotential deposition (UPD) of metals. The coverage of Ag NPs on the roughened Au substrate can be as high as 0.95. Experimental results indicate that the SERS of Rhodamine 6G (R6G) observed on this developed substrate exhibits a higher intensity by ca. 50-fold of magnitude, as compared with that of R6G observed on the substrate without the deposition of Ag NPs. The limit of detection (LOD) for R6G measured on this substrate is markedly reduced to 2×10(-15)M. Moreover, aging of SERS effect observed on this developed substrate is significantly depressed, as compared with that observed on a generally prepared SERS-active Ag substrate. These aging tests were performed in an atmosphere of 50% relative humidity (RH) and 20% (v/v) O2 at 30°C for 60 day. Also, the developed SERS-active substrate enables it practically applicable in the trace detection of monosodium urate (MSU)-containing solution in gouty arthritis without a further purification process. SN - 1873-4324 UR - https://www.unboundmedicine.com/medline/citation/24331055/Silver_overlayer_modified_surface_enhanced_Raman_scattering_active_gold_substrates_for_potential_applications_in_trace_detection_of_biochemical_species_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0003-2670(13)01453-0 DB - PRIME DP - Unbound Medicine ER -