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Estimation of dielectric function of biotin-capped gold nanoparticles via signal enhancement on surface plasmon resonance.
J Phys Chem B. 2006 Aug 17; 110(32):15755-62.JP

Abstract

Biotin-capped gold nanoparticles assembled on flat gold with volume fraction f are studied by surface plasmon resonance (SPR) spectroscopy and atomic force microscopy (AFM) in order to estimate the dielectric function of the gold nanoparticles based on the Maxwell-Garnett (MG) theory. The complex dielectric function (epsilon',epsilon'') of the spherical nanoparticles at three representative wavelengths in the vis-near-IR region, i.e., lambda = 543, 632.8, and 1152 nm, is estimated for a surface homogeneously covered with nanoparticles in order to discuss the wavelength dependence of the dielectric function. The SPR response of a surface covered with particles in 2D aggregates is also analyzed. The experimental SPR curve of the particle aggregates deviates from the theoretical predictions, suggesting dipole interactions between particles.

Authors+Show Affiliations

Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta-cho, Yokohama, Kanagawa 226-8502, Japan.No affiliation info availableNo 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

16898722

Citation

Li, Xinheng, et al. "Estimation of Dielectric Function of Biotin-capped Gold Nanoparticles Via Signal Enhancement On Surface Plasmon Resonance." The Journal of Physical Chemistry. B, vol. 110, no. 32, 2006, pp. 15755-62.
Li X, Tamada K, Baba A, et al. Estimation of dielectric function of biotin-capped gold nanoparticles via signal enhancement on surface plasmon resonance. J Phys Chem B. 2006;110(32):15755-62.
Li, X., Tamada, K., Baba, A., Knoll, W., & Hara, M. (2006). Estimation of dielectric function of biotin-capped gold nanoparticles via signal enhancement on surface plasmon resonance. The Journal of Physical Chemistry. B, 110(32), 15755-62.
Li X, et al. Estimation of Dielectric Function of Biotin-capped Gold Nanoparticles Via Signal Enhancement On Surface Plasmon Resonance. J Phys Chem B. 2006 Aug 17;110(32):15755-62. PubMed PMID: 16898722.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Estimation of dielectric function of biotin-capped gold nanoparticles via signal enhancement on surface plasmon resonance. AU - Li,Xinheng, AU - Tamada,Kaoru, AU - Baba,Akira, AU - Knoll,Wolfgang, AU - Hara,Masahiko, PY - 2006/8/11/pubmed PY - 2007/8/29/medline PY - 2006/8/11/entrez SP - 15755 EP - 62 JF - The journal of physical chemistry. B JO - J Phys Chem B VL - 110 IS - 32 N2 - Biotin-capped gold nanoparticles assembled on flat gold with volume fraction f are studied by surface plasmon resonance (SPR) spectroscopy and atomic force microscopy (AFM) in order to estimate the dielectric function of the gold nanoparticles based on the Maxwell-Garnett (MG) theory. The complex dielectric function (epsilon',epsilon'') of the spherical nanoparticles at three representative wavelengths in the vis-near-IR region, i.e., lambda = 543, 632.8, and 1152 nm, is estimated for a surface homogeneously covered with nanoparticles in order to discuss the wavelength dependence of the dielectric function. The SPR response of a surface covered with particles in 2D aggregates is also analyzed. The experimental SPR curve of the particle aggregates deviates from the theoretical predictions, suggesting dipole interactions between particles. SN - 1520-6106 UR - https://www.unboundmedicine.com/medline/citation/16898722/Estimation_of_dielectric_function_of_biotin_capped_gold_nanoparticles_via_signal_enhancement_on_surface_plasmon_resonance_ L2 - https://doi.org/10.1021/jp062004h DB - PRIME DP - Unbound Medicine ER -