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Self-assembled silver nanochains for surface-enhanced Raman scattering.
Langmuir. 2007 Nov 20; 23(24):12042-7.L

Abstract

Surface-enhanced Raman scattering (SERS) integrates high levels of sensitivity with spectroscopic precision and has tremendous potential for chemical and biomolecular sensing. The key to the wider application of Raman spectroscopy using roughened metallic surfaces is the development of highly enhancing substrates for analytical purposes. Here, we demonstrate a simple strategy for self-assembling silver nanochains on glass substrates for sensitive SERS substrates. The chain length of short Ag nanochains can be controlled by adjusting the concentration of cetyltrimethylammonium bromide (CTAB) and 11-mercaptoundecanoic acid (MUA). CTAB with appropriate concentration serves as the "glue" that can link the {100} facets of two neighboring Ag nanoparticles. MUA is found to be effective in "freezing up" the aggregation of Ag short chains and preventing them from further aggregating into a long chainlike network structure. The surface plasmon bands can be tuned over an extended wavelength range by controlling the length of the nanochains. The Ag monolayer, mainly composed of four-particle nanochains, exhibited the maximum SERS enhancement factor of around 2.6 x 108, indicating that a stronger SERS enhancement can be obtained in these interstitial sites of chainlike aggregated Ag nanoparticles.

Authors+Show Affiliations

Department of Materials Science and Engineering, Nagoya Institute of Technology, Showa, Nagoya, Japan. yang.yong@nitech.ac.jpNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17963408

Citation

Yang, Yong, et al. "Self-assembled Silver Nanochains for Surface-enhanced Raman Scattering." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 23, no. 24, 2007, pp. 12042-7.
Yang Y, Shi J, Tanaka T, et al. Self-assembled silver nanochains for surface-enhanced Raman scattering. Langmuir. 2007;23(24):12042-7.
Yang, Y., Shi, J., Tanaka, T., & Nogami, M. (2007). Self-assembled silver nanochains for surface-enhanced Raman scattering. Langmuir : the ACS Journal of Surfaces and Colloids, 23(24), 12042-7.
Yang Y, et al. Self-assembled Silver Nanochains for Surface-enhanced Raman Scattering. Langmuir. 2007 Nov 20;23(24):12042-7. PubMed PMID: 17963408.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-assembled silver nanochains for surface-enhanced Raman scattering. AU - Yang,Yong, AU - Shi,Jianlin, AU - Tanaka,Taiki, AU - Nogami,Masayuki, Y1 - 2007/10/27/ PY - 2007/10/30/pubmed PY - 2008/2/9/medline PY - 2007/10/30/entrez SP - 12042 EP - 7 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 23 IS - 24 N2 - Surface-enhanced Raman scattering (SERS) integrates high levels of sensitivity with spectroscopic precision and has tremendous potential for chemical and biomolecular sensing. The key to the wider application of Raman spectroscopy using roughened metallic surfaces is the development of highly enhancing substrates for analytical purposes. Here, we demonstrate a simple strategy for self-assembling silver nanochains on glass substrates for sensitive SERS substrates. The chain length of short Ag nanochains can be controlled by adjusting the concentration of cetyltrimethylammonium bromide (CTAB) and 11-mercaptoundecanoic acid (MUA). CTAB with appropriate concentration serves as the "glue" that can link the {100} facets of two neighboring Ag nanoparticles. MUA is found to be effective in "freezing up" the aggregation of Ag short chains and preventing them from further aggregating into a long chainlike network structure. The surface plasmon bands can be tuned over an extended wavelength range by controlling the length of the nanochains. The Ag monolayer, mainly composed of four-particle nanochains, exhibited the maximum SERS enhancement factor of around 2.6 x 108, indicating that a stronger SERS enhancement can be obtained in these interstitial sites of chainlike aggregated Ag nanoparticles. SN - 0743-7463 UR - https://www.unboundmedicine.com/medline/citation/17963408/Self_assembled_silver_nanochains_for_surface_enhanced_Raman_scattering_ L2 - https://doi.org/10.1021/la701610s DB - PRIME DP - Unbound Medicine ER -