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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todo:paper_14639076_v6_n2_p424_Bellino2023-10-03T16:17:01Z Adsorption kinetics of charged thiols on gold nanoparticles Bellino, M.G. Calvo, E.J. Gordillo, G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, M.G. Calvo, E.J. Gordillo, G. 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. |
format |
JOUR |
author |
Bellino, M.G. Calvo, E.J. Gordillo, G. |
author_facet |
Bellino, M.G. Calvo, E.J. Gordillo, G. |
author_sort |
Bellino, M.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 |
url |
http://hdl.handle.net/20.500.12110/paper_14639076_v6_n2_p424_Bellino |
work_keys_str_mv |
AT bellinomg adsorptionkineticsofchargedthiolsongoldnanoparticles AT calvoej adsorptionkineticsofchargedthiolsongoldnanoparticles AT gordillog adsorptionkineticsofchargedthiolsongoldnanoparticles |
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1782027730395594752 |