Naked Gold Nanoparticles and hot Electrons in Water

Abstract The ionizing radiation in aqueous solutions of gold nanoparticles, stabilized by electrostatic non-covalent intermolecular forces and steric interactions, with antimicrobial compounds, are investigated with picosecond pulse radiolysis techniques. Upon pulse radiolysis of an aqueous solution...

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Autores principales:	Khashayar Ghandi, Furong Wang, Cody Landry, Mehran Mostafavi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/41ac8718978947a9baeb92534e567d8c
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spelling	oai:doaj.org-article:41ac8718978947a9baeb92534e567d8c2021-12-02T12:33:01ZNaked Gold Nanoparticles and hot Electrons in Water10.1038/s41598-018-25711-22045-2322https://doaj.org/article/41ac8718978947a9baeb92534e567d8c2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25711-2https://doaj.org/toc/2045-2322Abstract The ionizing radiation in aqueous solutions of gold nanoparticles, stabilized by electrostatic non-covalent intermolecular forces and steric interactions, with antimicrobial compounds, are investigated with picosecond pulse radiolysis techniques. Upon pulse radiolysis of an aqueous solution containing very low concentrations of gold nanoparticles with naked surfaces available in water (not obstructed by chemical bonds), a change to Cerenkov spectrum over a large range of wavelengths are observed and pre-solvated electrons are captured by gold nanoparticles exclusively (not by ionic liquid surfactants used to stabilize the nanoparticles). The solvated electrons are also found to decay rapidly compared with the decay kinetics in water. These very fast reactions with electrons in water could provide an enhanced oxidizing zone around gold nanoparticles and this could be the reason for radio sensitizing behavior of gold nanoparticles in radiation therapy.Khashayar GhandiFurong WangCody LandryMehran MostafaviNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-6 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Khashayar Ghandi Furong Wang Cody Landry Mehran Mostafavi Naked Gold Nanoparticles and hot Electrons in Water
description	Abstract The ionizing radiation in aqueous solutions of gold nanoparticles, stabilized by electrostatic non-covalent intermolecular forces and steric interactions, with antimicrobial compounds, are investigated with picosecond pulse radiolysis techniques. Upon pulse radiolysis of an aqueous solution containing very low concentrations of gold nanoparticles with naked surfaces available in water (not obstructed by chemical bonds), a change to Cerenkov spectrum over a large range of wavelengths are observed and pre-solvated electrons are captured by gold nanoparticles exclusively (not by ionic liquid surfactants used to stabilize the nanoparticles). The solvated electrons are also found to decay rapidly compared with the decay kinetics in water. These very fast reactions with electrons in water could provide an enhanced oxidizing zone around gold nanoparticles and this could be the reason for radio sensitizing behavior of gold nanoparticles in radiation therapy.
format	article
author	Khashayar Ghandi Furong Wang Cody Landry Mehran Mostafavi
author_facet	Khashayar Ghandi Furong Wang Cody Landry Mehran Mostafavi
author_sort	Khashayar Ghandi
title	Naked Gold Nanoparticles and hot Electrons in Water
title_short	Naked Gold Nanoparticles and hot Electrons in Water
title_full	Naked Gold Nanoparticles and hot Electrons in Water
title_fullStr	Naked Gold Nanoparticles and hot Electrons in Water
title_full_unstemmed	Naked Gold Nanoparticles and hot Electrons in Water
title_sort	naked gold nanoparticles and hot electrons in water
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/41ac8718978947a9baeb92534e567d8c
work_keys_str_mv	AT khashayarghandi nakedgoldnanoparticlesandhotelectronsinwater AT furongwang nakedgoldnanoparticlesandhotelectronsinwater AT codylandry nakedgoldnanoparticlesandhotelectronsinwater AT mehranmostafavi nakedgoldnanoparticlesandhotelectronsinwater
_version_	1718393855159566336

Naked Gold Nanoparticles and hot Electrons in Water

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