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Versatile solution phase triangular silver nanoplates for highly sensitive plasmon resonance sensing.
ACS Nano. 2010 Jan 26; 4(1):55-64.AN

Abstract

Solution phase triangular silver nanoplates (TSNP) with versatile tunability throughout the visible-NIR wavelengths are presented as highly sensitive localized surface plasmon refractive index sensors. A range of 20 TSNP solutions with edge lengths ranging from 11 to 200 nm and aspect ratios from 2 to 13 have been studied comprehensively using AFM, TEM, and UV-vis-NIR spectroscopy. Studies of the localized surface plasmon resonance (LSPR) peak's sensitivity to refractive index changes are performed using a simple sucrose concentration method whereby the surrounding refractive index can solely be changed without variation in any other parameter. The dependence of the TSNP localized surface plasmon resonance (LSPR) peak wavelength lambda(max) and its bulk refractive index sensitivity on the nanoplate's structure is determined. LSPR sensitivities are observed to increase linearly with lambda(max) up to 800 nm, with the values lying within the upper limit theoretically predicted for optimal sensitivity, notwithstanding any diminution due to ensemble averaging. A nonlinear increase in sensitivity is apparent at wavelengths within the NIR region with values reaching 1096 nm.RIU(-1) at lambda(max) 1093 nm. Theoretical studies performed using a simple aspect ratio dependent approximation method and discrete dipole approximation methods confirm the dependence of the LSPR bulk refractive index sensitivity upon the TSNP aspect ratio measured experimentally. These studies highlight the importance of this key parameter in acquiring such high sensitivities and promote these TSNP sols for sensing applications at appropriate wavelengths for biological samples.

Authors+Show Affiliations

School of Physics, Trinity College Dublin, Ireland .No affiliation info availableNo affiliation info availableNo affiliation info availableNo 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

20030362

Citation

Charles, Denise E., et al. "Versatile Solution Phase Triangular Silver Nanoplates for Highly Sensitive Plasmon Resonance Sensing." ACS Nano, vol. 4, no. 1, 2010, pp. 55-64.
Charles DE, Aherne D, Gara M, et al. Versatile solution phase triangular silver nanoplates for highly sensitive plasmon resonance sensing. ACS Nano. 2010;4(1):55-64.
Charles, D. E., Aherne, D., Gara, M., Ledwith, D. M., Gun'ko, Y. K., Kelly, J. M., Blau, W. J., & Brennan-Fournet, M. E. (2010). Versatile solution phase triangular silver nanoplates for highly sensitive plasmon resonance sensing. ACS Nano, 4(1), 55-64. https://doi.org/10.1021/nn9016235
Charles DE, et al. Versatile Solution Phase Triangular Silver Nanoplates for Highly Sensitive Plasmon Resonance Sensing. ACS Nano. 2010 Jan 26;4(1):55-64. PubMed PMID: 20030362.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Versatile solution phase triangular silver nanoplates for highly sensitive plasmon resonance sensing. AU - Charles,Denise E, AU - Aherne,Damian, AU - Gara,Matthew, AU - Ledwith,Deirdre M, AU - Gun'ko,Yurii K, AU - Kelly,John M, AU - Blau,Werner J, AU - Brennan-Fournet,Margaret E, PY - 2009/12/25/entrez PY - 2009/12/25/pubmed PY - 2010/3/27/medline SP - 55 EP - 64 JF - ACS nano JO - ACS Nano VL - 4 IS - 1 N2 - Solution phase triangular silver nanoplates (TSNP) with versatile tunability throughout the visible-NIR wavelengths are presented as highly sensitive localized surface plasmon refractive index sensors. A range of 20 TSNP solutions with edge lengths ranging from 11 to 200 nm and aspect ratios from 2 to 13 have been studied comprehensively using AFM, TEM, and UV-vis-NIR spectroscopy. Studies of the localized surface plasmon resonance (LSPR) peak's sensitivity to refractive index changes are performed using a simple sucrose concentration method whereby the surrounding refractive index can solely be changed without variation in any other parameter. The dependence of the TSNP localized surface plasmon resonance (LSPR) peak wavelength lambda(max) and its bulk refractive index sensitivity on the nanoplate's structure is determined. LSPR sensitivities are observed to increase linearly with lambda(max) up to 800 nm, with the values lying within the upper limit theoretically predicted for optimal sensitivity, notwithstanding any diminution due to ensemble averaging. A nonlinear increase in sensitivity is apparent at wavelengths within the NIR region with values reaching 1096 nm.RIU(-1) at lambda(max) 1093 nm. Theoretical studies performed using a simple aspect ratio dependent approximation method and discrete dipole approximation methods confirm the dependence of the LSPR bulk refractive index sensitivity upon the TSNP aspect ratio measured experimentally. These studies highlight the importance of this key parameter in acquiring such high sensitivities and promote these TSNP sols for sensing applications at appropriate wavelengths for biological samples. SN - 1936-086X UR - https://www.unboundmedicine.com/medline/citation/20030362/Versatile_solution_phase_triangular_silver_nanoplates_for_highly_sensitive_plasmon_resonance_sensing_ L2 - https://doi.org/10.1021/nn9016235 DB - PRIME DP - Unbound Medicine ER -