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Abstract:

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.

Registro:

Documento: Artículo
Título:Coverage and aggregation of gold nanoparticles on silanized glasses
Autor:Scarpettini, A.F.; Bragas, A.V.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
IFIBA, Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
Palabras clave:Characteristic time; Counting statistics; Different sizes; Electrostatic repulsion; Extinction spectra; Glass substrates; Gold Nanoparticles; Saturation values; Exponential functions; Glass; Oligomers; Substrates; Nanoparticles
Año:2010
Volumen:26
Número:20
Página de inicio:15948
Página de fin:15953
DOI: http://dx.doi.org/10.1021/la102937b
Título revista:Langmuir
Título revista abreviado:Langmuir
ISSN:07437463
CODEN:LANGD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v26_n20_p15948_Scarpettini

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Citas:

---------- APA ----------
Scarpettini, A.F. & Bragas, A.V. (2010) . Coverage and aggregation of gold nanoparticles on silanized glasses. Langmuir, 26(20), 15948-15953.
http://dx.doi.org/10.1021/la102937b
---------- CHICAGO ----------
Scarpettini, A.F., Bragas, A.V. "Coverage and aggregation of gold nanoparticles on silanized glasses" . Langmuir 26, no. 20 (2010) : 15948-15953.
http://dx.doi.org/10.1021/la102937b
---------- MLA ----------
Scarpettini, A.F., Bragas, A.V. "Coverage and aggregation of gold nanoparticles on silanized glasses" . Langmuir, vol. 26, no. 20, 2010, pp. 15948-15953.
http://dx.doi.org/10.1021/la102937b
---------- VANCOUVER ----------
Scarpettini, A.F., Bragas, A.V. Coverage and aggregation of gold nanoparticles on silanized glasses. Langmuir. 2010;26(20):15948-15953.
http://dx.doi.org/10.1021/la102937b