Density Gradient Selection of Colloidal Silver Nanotriangles for Assembling Dye-Particle Plasmophores
authors Oliveira-Silva, R; Sousa-Jeronimo, M; Botequim, D; Silva, NJO; Prazeres, DMF; Paulo, PMR
nationality International
journal NANOMATERIALS
author keywords colloidal metal nanoparticles; density gradient centrifugation; plasmonics; fluorescence correlation spectroscopy; plasmophores
keywords SINGLE-MOLECULE FLUORESCENCE; PLASMON-CONTROLLED FLUORESCENCE; GOLD NANOPARTICLES; ENHANCEMENT; EMISSION; PHOTOLUMINESCENCE; SEPARATION; PROTEIN; LIGHT
abstract A simple method based on sucrose density gradient centrifugation is proposed here for the fractionation of colloidal silver nanotriangles. This method afforded particle fractions with surface plasmon resonances, spanning from red to infrared spectral ranges that could be used to tune optical properties for plasmonic applications. This feature was exemplified by selecting silver nanotriangle samples with spectral overlap with Atto-655 dye's absorption and emission in order to assemble dye-particle plasmophores. The emission brightness of an individual plasmophore, as characterized by fluorescence correlation spectroscopy, is at least 1000-fold more intense than that of a single Atto-655 dye label, which renders them as promising platforms for the development of fluorescence-based nanosensors.
publisher MDPI
issn 2079-4991
year published 2019
volume 9
issue 6
digital object identifier (doi) 10.3390/nano9060893
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000475352900087
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  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.324
5 year journal impact factor 4.514
category normalized journal impact factor percentile 65.762
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