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White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids

[Image: see text] We demonstrate the use of white-light spectral interferometry as an effective technique involving only linear optical interactions and a partially coherent light source to measure the complex transmission response function of optical resonance and to determine the corresponding var...

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Autores principales: Praturi, Aparna, Schrod, Stefan, Singh, Bhanu Pratap, Vasa, Parinda
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10125346/
https://www.ncbi.nlm.nih.gov/pubmed/37101849
http://dx.doi.org/10.1021/acsnanoscienceau.2c00014
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author Praturi, Aparna
Schrod, Stefan
Singh, Bhanu Pratap
Vasa, Parinda
author_facet Praturi, Aparna
Schrod, Stefan
Singh, Bhanu Pratap
Vasa, Parinda
author_sort Praturi, Aparna
collection PubMed
description [Image: see text] We demonstrate the use of white-light spectral interferometry as an effective technique involving only linear optical interactions and a partially coherent light source to measure the complex transmission response function of optical resonance and to determine the corresponding variation in the refractive index relative to a reference. We also discuss experimental arrangements to increase the accuracy and sensitivity of the technique. The superiority of the technique over single-beam absorption measurements is demonstrated by the accurate determination of the response function of the chlorophyll-a solution. The technique is then applied to chlorophyll-a solutions of varying concentrations and gold nanocolloids to characterize inhomogeneous broadening. Results on the inhomogeneity of gold nanocolloids are also supported by transmission electron micrographs, showing distributions of the size and shape of the constituent gold nanorods.
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spelling pubmed-101253462023-04-25 White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids Praturi, Aparna Schrod, Stefan Singh, Bhanu Pratap Vasa, Parinda ACS Nanosci Au [Image: see text] We demonstrate the use of white-light spectral interferometry as an effective technique involving only linear optical interactions and a partially coherent light source to measure the complex transmission response function of optical resonance and to determine the corresponding variation in the refractive index relative to a reference. We also discuss experimental arrangements to increase the accuracy and sensitivity of the technique. The superiority of the technique over single-beam absorption measurements is demonstrated by the accurate determination of the response function of the chlorophyll-a solution. The technique is then applied to chlorophyll-a solutions of varying concentrations and gold nanocolloids to characterize inhomogeneous broadening. Results on the inhomogeneity of gold nanocolloids are also supported by transmission electron micrographs, showing distributions of the size and shape of the constituent gold nanorods. American Chemical Society 2022-07-18 /pmc/articles/PMC10125346/ /pubmed/37101849 http://dx.doi.org/10.1021/acsnanoscienceau.2c00014 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Praturi, Aparna
Schrod, Stefan
Singh, Bhanu Pratap
Vasa, Parinda
White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title_full White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title_fullStr White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title_full_unstemmed White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title_short White-Light Spectral Interferometry for Characterizing Inhomogeneity in Solutions and Nanocolloids
title_sort white-light spectral interferometry for characterizing inhomogeneity in solutions and nanocolloids
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10125346/
https://www.ncbi.nlm.nih.gov/pubmed/37101849
http://dx.doi.org/10.1021/acsnanoscienceau.2c00014
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