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Easy deposition of Ag onto polystyrene beads for developing surface-enhanced-Raman-scattering-based molecular sensors.
J Colloid Interface Sci. 2008 Feb 15; 318(2):195-201.JC

Abstract

We describe a very simple electroless plating method that can be used to prepare Ag-coated polystyrene beads. Robust Ag nanostructures are reproducibly fabricated by soaking polystyrene beads in ethanolic solutions of AgNO(3) and butylamine. When the molar ratio of butylamine to AgNO(3) is far below 1.0, distinct nanosized Ag particles are formed on the polystyrene beads, but by increasing the amount of butylamine, network-like Ag nanostructures are formed that possess very broad UV/vis absorption characteristics extending from the near-UV to near-infrared regions. In conformity with the UV/vis absorption characteristics, the Ag-deposited polystyrene beads were highly efficient surface-enhanced Raman scattering (SERS) substrates, with an enhancement factor estimated using 4-aminobenzenethiol (4-ABT) as a model adsorbate to be larger than 1.1x10(6). On the basis of the nature of the SERS peaks of 4-ABT, those Ag-deposited polystyrene beads were confirmed, after attaching biotin groups over 4-ABT, to selectively recognize streptavidin molecules down to concentrations of 10(-11) g mL(-1) (i.e., approximately 0.2 pM). Since a number of different molecules can be used as SERS-marker molecules (such as 4-ABT), multiple bioassays are readily accomplished via SERS after attaching appropriate host or guest molecules onto them.

Authors+Show Affiliations

Department of Chemistry, Seoul National University, Seoul 151-742, Republic of Korea. kwankim@snu.ac.krNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18001760

Citation

Kim, Kwan, et al. "Easy Deposition of Ag Onto Polystyrene Beads for Developing surface-enhanced-Raman-scattering-based Molecular Sensors." Journal of Colloid and Interface Science, vol. 318, no. 2, 2008, pp. 195-201.
Kim K, Lee HB, Park HK, et al. Easy deposition of Ag onto polystyrene beads for developing surface-enhanced-Raman-scattering-based molecular sensors. J Colloid Interface Sci. 2008;318(2):195-201.
Kim, K., Lee, H. B., Park, H. K., & Shin, K. S. (2008). Easy deposition of Ag onto polystyrene beads for developing surface-enhanced-Raman-scattering-based molecular sensors. Journal of Colloid and Interface Science, 318(2), 195-201.
Kim K, et al. Easy Deposition of Ag Onto Polystyrene Beads for Developing surface-enhanced-Raman-scattering-based Molecular Sensors. J Colloid Interface Sci. 2008 Feb 15;318(2):195-201. PubMed PMID: 18001760.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Easy deposition of Ag onto polystyrene beads for developing surface-enhanced-Raman-scattering-based molecular sensors. AU - Kim,Kwan, AU - Lee,Hyang Bong, AU - Park,Hyoung Kun, AU - Shin,Kuan Soo, Y1 - 2007/11/14/ PY - 2007/07/28/received PY - 2007/09/11/revised PY - 2007/09/12/accepted PY - 2007/11/16/pubmed PY - 2008/3/21/medline PY - 2007/11/16/entrez SP - 195 EP - 201 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 318 IS - 2 N2 - We describe a very simple electroless plating method that can be used to prepare Ag-coated polystyrene beads. Robust Ag nanostructures are reproducibly fabricated by soaking polystyrene beads in ethanolic solutions of AgNO(3) and butylamine. When the molar ratio of butylamine to AgNO(3) is far below 1.0, distinct nanosized Ag particles are formed on the polystyrene beads, but by increasing the amount of butylamine, network-like Ag nanostructures are formed that possess very broad UV/vis absorption characteristics extending from the near-UV to near-infrared regions. In conformity with the UV/vis absorption characteristics, the Ag-deposited polystyrene beads were highly efficient surface-enhanced Raman scattering (SERS) substrates, with an enhancement factor estimated using 4-aminobenzenethiol (4-ABT) as a model adsorbate to be larger than 1.1x10(6). On the basis of the nature of the SERS peaks of 4-ABT, those Ag-deposited polystyrene beads were confirmed, after attaching biotin groups over 4-ABT, to selectively recognize streptavidin molecules down to concentrations of 10(-11) g mL(-1) (i.e., approximately 0.2 pM). Since a number of different molecules can be used as SERS-marker molecules (such as 4-ABT), multiple bioassays are readily accomplished via SERS after attaching appropriate host or guest molecules onto them. SN - 0021-9797 UR - https://www.unboundmedicine.com/medline/citation/18001760/Easy_deposition_of_Ag_onto_polystyrene_beads_for_developing_surface_enhanced_Raman_scattering_based_molecular_sensors_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(07)01334-3 DB - PRIME DP - Unbound Medicine ER -