Adsorption kinetics of charged thiols on gold nanoparticles

Colloidal Au nanoparticles have been functionalized with mercaptopropane sulfonate (MPS) and mercaptoethylamine (MEA) short alkanethiols in aqueous solutions. Adsorption kinetics of these charged thiols onto gold nanoparticles has been followed by the decrease in the surface plasmon band at 530 nm d...

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Autores principales: Bellino, Martín G., Calvo, Ernesto Julio
Publicado: 2004
Materias:
gold
mercaptopropane
propane
thiol derivative
unclassified drug
addition reaction
adsorption kinetics
aqueous solution
article
colloid
complex formation
electric potential
electricity
molecular interaction
molecular mechanics
nanoparticle
reaction analysis
surface property
titrimetry
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v6_n2_p424_Bellino
http://hdl.handle.net/20.500.12110/paper_14639076_v6_n2_p424_Bellino
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14639076_v6_n2_p424_Bellino
record_format dspace
spelling paper:paper_14639076_v6_n2_p424_Bellino2023-06-08T16:16:36Z Adsorption kinetics of charged thiols on gold nanoparticles Bellino, Martín G. Calvo, Ernesto Julio gold mercaptopropane propane thiol derivative unclassified drug addition reaction adsorption kinetics aqueous solution article colloid complex formation electric potential electricity molecular interaction molecular mechanics nanoparticle reaction analysis surface property titrimetry Colloidal Au nanoparticles have been functionalized with mercaptopropane sulfonate (MPS) and mercaptoethylamine (MEA) short alkanethiols in aqueous solutions. Adsorption kinetics of these charged thiols onto gold nanoparticles has been followed by the decrease in the surface plasmon band at 530 nm due to the red shift caused by particle-to-particle aggregation. Titration curves resulted from plotting the 530 and 800 nm-absorbance versus the added amount of thiol in solution, and yielded the mercaptane coverage on Au. While the adsorption of positively charged MEA on negatively charged Au colloid is very rapid, slower and more complex adsorption kinetics have been found for the negatively charged MPS. Fil:Bellino, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v6_n2_p424_Bellino http://hdl.handle.net/20.500.12110/paper_14639076_v6_n2_p424_Bellino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic gold
mercaptopropane
propane
thiol derivative
unclassified drug
addition reaction
adsorption kinetics
aqueous solution
article
colloid
complex formation
electric potential
electricity
molecular interaction
molecular mechanics
nanoparticle
reaction analysis
surface property
titrimetry
spellingShingle gold
mercaptopropane
propane
thiol derivative
unclassified drug
addition reaction
adsorption kinetics
aqueous solution
article
colloid
complex formation
electric potential
electricity
molecular interaction
molecular mechanics
nanoparticle
reaction analysis
surface property
titrimetry
Bellino, Martín G.
Calvo, Ernesto Julio
Adsorption kinetics of charged thiols on gold nanoparticles
topic_facet gold
mercaptopropane
propane
thiol derivative
unclassified drug
addition reaction
adsorption kinetics
aqueous solution
article
colloid
complex formation
electric potential
electricity
molecular interaction
molecular mechanics
nanoparticle
reaction analysis
surface property
titrimetry
description Colloidal Au nanoparticles have been functionalized with mercaptopropane sulfonate (MPS) and mercaptoethylamine (MEA) short alkanethiols in aqueous solutions. Adsorption kinetics of these charged thiols onto gold nanoparticles has been followed by the decrease in the surface plasmon band at 530 nm due to the red shift caused by particle-to-particle aggregation. Titration curves resulted from plotting the 530 and 800 nm-absorbance versus the added amount of thiol in solution, and yielded the mercaptane coverage on Au. While the adsorption of positively charged MEA on negatively charged Au colloid is very rapid, slower and more complex adsorption kinetics have been found for the negatively charged MPS.
author Bellino, Martín G.
Calvo, Ernesto Julio
author_facet Bellino, Martín G.
Calvo, Ernesto Julio
author_sort Bellino, Martín G.
title Adsorption kinetics of charged thiols on gold nanoparticles
title_short Adsorption kinetics of charged thiols on gold nanoparticles
title_full Adsorption kinetics of charged thiols on gold nanoparticles
title_fullStr Adsorption kinetics of charged thiols on gold nanoparticles
title_full_unstemmed Adsorption kinetics of charged thiols on gold nanoparticles
title_sort adsorption kinetics of charged thiols on gold nanoparticles
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v6_n2_p424_Bellino
http://hdl.handle.net/20.500.12110/paper_14639076_v6_n2_p424_Bellino
work_keys_str_mv AT bellinomarting adsorptionkineticsofchargedthiolsongoldnanoparticles
AT calvoernestojulio adsorptionkineticsofchargedthiolsongoldnanoparticles
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