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Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles

We discover an unexpected enhancement of the absorption of near-infrared light by aromatic amine overtones on photonic microfibers sculptured with gold nanoparticles. The adsorbed nanoparticles make the near-infrared spectroscopy of aromatic amines on microfibers feasible despite the small absorptio...

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Main Authors: Karabchevsky, Alina, Katiyi, Aviad, Abdul Khudus, Muhammad Imran Mustafa, Kavokin, Alexey V.
Format: Article
Published: American Chemical Society 2018
Subjects:
Q Science (General)
QC Physics
Online Access:http://eprints.um.edu.my/21694/
https://doi.org/10.1021/acsphotonics.8b00025
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spelling my.um.eprints.216942019-07-22T06:44:24Z http://eprints.um.edu.my/21694/ Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles Karabchevsky, Alina Katiyi, Aviad Abdul Khudus, Muhammad Imran Mustafa Kavokin, Alexey V. Q Science (General) QC Physics We discover an unexpected enhancement of the absorption of near-infrared light by aromatic amine overtones on photonic microfibers sculptured with gold nanoparticles. The adsorbed nanoparticles make the near-infrared spectroscopy of aromatic amines on microfibers feasible despite the small absorption cross-section of the molecular vibration overtones. We demonstrate that in the presence of gold nanomediators, the absorption of light by weak overtone transitions in N-methylaniline as a model analyte is dramatically enhanced. We attribute this effect to the increase of the mean trajectory of light in a microfiber due to its resonant scattering on metallic nanoparticles. The spectrally integrated transmittance scales with the concentration of nanoparticles to the power 1/6 - the phenomenon of diffusive propagation of light. Practical applications of the discovered effect will include the detection of aromatic amines for efficient treatment of metabolic disorders resulting from the amino acids deficiency, research in biomedicine, and a number of bedside applications. American Chemical Society 2018 Article PeerReviewed Karabchevsky, Alina and Katiyi, Aviad and Abdul Khudus, Muhammad Imran Mustafa and Kavokin, Alexey V. (2018) Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles. ACS Photonics, 5 (6). pp. 2200-2207. ISSN 2330-4022 https://doi.org/10.1021/acsphotonics.8b00025 doi:10.1021/acsphotonics.8b00025
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Karabchevsky, Alina
Katiyi, Aviad
Abdul Khudus, Muhammad Imran Mustafa
Kavokin, Alexey V.
Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
description We discover an unexpected enhancement of the absorption of near-infrared light by aromatic amine overtones on photonic microfibers sculptured with gold nanoparticles. The adsorbed nanoparticles make the near-infrared spectroscopy of aromatic amines on microfibers feasible despite the small absorption cross-section of the molecular vibration overtones. We demonstrate that in the presence of gold nanomediators, the absorption of light by weak overtone transitions in N-methylaniline as a model analyte is dramatically enhanced. We attribute this effect to the increase of the mean trajectory of light in a microfiber due to its resonant scattering on metallic nanoparticles. The spectrally integrated transmittance scales with the concentration of nanoparticles to the power 1/6 - the phenomenon of diffusive propagation of light. Practical applications of the discovered effect will include the detection of aromatic amines for efficient treatment of metabolic disorders resulting from the amino acids deficiency, research in biomedicine, and a number of bedside applications.
format Article
author Karabchevsky, Alina
Katiyi, Aviad
Abdul Khudus, Muhammad Imran Mustafa
Kavokin, Alexey V.
author_facet Karabchevsky, Alina
Katiyi, Aviad
Abdul Khudus, Muhammad Imran Mustafa
Kavokin, Alexey V.
author_sort Karabchevsky, Alina
title Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
title_short Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
title_full Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
title_fullStr Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
title_full_unstemmed Tuning the Near-Infrared Absorption of Aromatic Amines on Tapered Fibers Sculptured with Gold Nanoparticles
title_sort tuning the near-infrared absorption of aromatic amines on tapered fibers sculptured with gold nanoparticles
publisher American Chemical Society
publishDate 2018
url http://eprints.um.edu.my/21694/
https://doi.org/10.1021/acsphotonics.8b00025
_version_ 1643691633470865408
score 13.211869

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