Coverage and aggregation of gold nanoparticles on silanized glasses

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We study the dynamics of the coverage and aggregation of gold nanoparticles over organosilanized glass substrates for different sizes of nanoparticles. We present measurements of extinction spectra and nanoparticle counting statistics and demonstrate that both methods are equivalent describing those...

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Autores principales: Scarpettini, A.F., Bragas, A.V.
Formato: JOUR
Materias:
Characteristic time
Counting statistics
Different sizes
Electrostatic repulsion
Extinction spectra
Glass substrates
Gold Nanoparticles
Saturation values
Exponential functions
Glass
Oligomers
Substrates
Nanoparticles
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07437463_v26_n20_p15948_Scarpettini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07437463_v26_n20_p15948_Scarpettini
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spelling todo:paper_07437463_v26_n20_p15948_Scarpettini2023-10-03T15:38:42Z Coverage and aggregation of gold nanoparticles on silanized glasses Scarpettini, A.F. Bragas, A.V. Characteristic time Counting statistics Different sizes Electrostatic repulsion Extinction spectra Glass substrates Gold Nanoparticles Saturation values Exponential functions Glass Oligomers Substrates Nanoparticles We study the dynamics of the coverage and aggregation of gold nanoparticles over organosilanized glass substrates for different sizes of nanoparticles. We present measurements of extinction spectra and nanoparticle counting statistics and demonstrate that both methods are equivalent describing those processes. We introduce models that describe the mentioned dynamics, which are characterized by an exponential-like function with two relevant parameters: a saturation value and a characteristic time. The electrostatic repulsion plays a significant role in both processes. The aggregation is dominated by the mobility of the isolated nanoparticles, which first join in dimers and, further in time, in clusters of higher number of nanoparticles. © 2010 American Chemical Society. Fil:Scarpettini, A.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bragas, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07437463_v26_n20_p15948_Scarpettini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Characteristic time
Counting statistics
Different sizes
Electrostatic repulsion
Extinction spectra
Glass substrates
Gold Nanoparticles
Saturation values
Exponential functions
Glass
Oligomers
Substrates
Nanoparticles
spellingShingle Characteristic time
Counting statistics
Different sizes
Electrostatic repulsion
Extinction spectra
Glass substrates
Gold Nanoparticles
Saturation values
Exponential functions
Glass
Oligomers
Substrates
Nanoparticles
Scarpettini, A.F.
Bragas, A.V.
Coverage and aggregation of gold nanoparticles on silanized glasses
topic_facet Characteristic time
Counting statistics
Different sizes
Electrostatic repulsion
Extinction spectra
Glass substrates
Gold Nanoparticles
Saturation values
Exponential functions
Glass
Oligomers
Substrates
Nanoparticles
description We study the dynamics of the coverage and aggregation of gold nanoparticles over organosilanized glass substrates for different sizes of nanoparticles. We present measurements of extinction spectra and nanoparticle counting statistics and demonstrate that both methods are equivalent describing those processes. We introduce models that describe the mentioned dynamics, which are characterized by an exponential-like function with two relevant parameters: a saturation value and a characteristic time. The electrostatic repulsion plays a significant role in both processes. The aggregation is dominated by the mobility of the isolated nanoparticles, which first join in dimers and, further in time, in clusters of higher number of nanoparticles. © 2010 American Chemical Society.
format JOUR
author Scarpettini, A.F.
Bragas, A.V.
author_facet Scarpettini, A.F.
Bragas, A.V.
author_sort Scarpettini, A.F.
title Coverage and aggregation of gold nanoparticles on silanized glasses
title_short Coverage and aggregation of gold nanoparticles on silanized glasses
title_full Coverage and aggregation of gold nanoparticles on silanized glasses
title_fullStr Coverage and aggregation of gold nanoparticles on silanized glasses
title_full_unstemmed Coverage and aggregation of gold nanoparticles on silanized glasses
title_sort coverage and aggregation of gold nanoparticles on silanized glasses
url http://hdl.handle.net/20.500.12110/paper_07437463_v26_n20_p15948_Scarpettini
work_keys_str_mv AT scarpettiniaf coverageandaggregationofgoldnanoparticlesonsilanizedglasses
AT bragasav coverageandaggregationofgoldnanoparticlesonsilanizedglasses
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