Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles

Silicon nanoparticles of 1–5 nm size (SiNPs) were synthesized by a bottom-up (BU) approach involving a chemical wet method. The contribution of different emitters to the overall excitation–emission matrix was analyzed on the assumption that pure substances existing in a unique form show an excitatio...

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Detalles Bibliográficos
Autores principales: Llansola Portolés, Manuel José, Pis Diez, Reinaldo, Dell'Arciprete, María Laura, Caregnato, Paula, Romero, Juan José, Mártire, Daniel Osvaldo, Azzaroni, Omar, Ceolín, Marcelo Raúl, González, Mónica Cristina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Química
Aromatic compounds
Nanoparticles
Semiconducting nanostructured materials
Silicon
Suspensions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/170195
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-170195
record_format dspace
spelling I19-R120-10915-1701952024-09-14T04:08:35Z http://sedici.unlp.edu.ar/handle/10915/170195 Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles Llansola Portolés, Manuel José Pis Diez, Reinaldo Dell'Arciprete, María Laura Caregnato, Paula Romero, Juan José Mártire, Daniel Osvaldo Azzaroni, Omar Ceolín, Marcelo Raúl González, Mónica Cristina 2012 2024-09-13T18:46:13Z en Química Aromatic compounds Nanoparticles Semiconducting nanostructured materials Silicon Suspensions Silicon nanoparticles of 1–5 nm size (SiNPs) were synthesized by a bottom-up (BU) approach involving a chemical wet method. The contribution of different emitters to the overall excitation–emission matrix was analyzed on the assumption that pure substances existing in a unique form show an excitation wavelength-invariant emission spectrum. The occurrence of emitters differing in size and aggregation was supported by transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), time-resolved single photon counting, and time-resolved anisotropy experiments. The effect on photoluminescence (PL) of the particle surface oxidation as a result of aging is studied and compared to that of surface oxidized particles obtained by a top-down (TD) approach following an electrochemical method with HF etching. Surface oxidation to SiOx seems to introduce two different effects on the SiNP PL. An emission originated in surface states associated to SiOx was identified and observed for SiNPs synthesized by both BU and TD approaches. Blue-shifted excitation–emission spectra associated to a silicon core in embedded SiOx nanostructures were also identified. Theoretical studies were carried out to help understand the observed results. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 11315-11325
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Aromatic compounds
Nanoparticles
Semiconducting nanostructured materials
Silicon
Suspensions
spellingShingle Química
Aromatic compounds
Nanoparticles
Semiconducting nanostructured materials
Silicon
Suspensions
Llansola Portolés, Manuel José
Pis Diez, Reinaldo
Dell'Arciprete, María Laura
Caregnato, Paula
Romero, Juan José
Mártire, Daniel Osvaldo
Azzaroni, Omar
Ceolín, Marcelo Raúl
González, Mónica Cristina
Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
topic_facet Química
Aromatic compounds
Nanoparticles
Semiconducting nanostructured materials
Silicon
Suspensions
description Silicon nanoparticles of 1–5 nm size (SiNPs) were synthesized by a bottom-up (BU) approach involving a chemical wet method. The contribution of different emitters to the overall excitation–emission matrix was analyzed on the assumption that pure substances existing in a unique form show an excitation wavelength-invariant emission spectrum. The occurrence of emitters differing in size and aggregation was supported by transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), time-resolved single photon counting, and time-resolved anisotropy experiments. The effect on photoluminescence (PL) of the particle surface oxidation as a result of aging is studied and compared to that of surface oxidized particles obtained by a top-down (TD) approach following an electrochemical method with HF etching. Surface oxidation to SiOx seems to introduce two different effects on the SiNP PL. An emission originated in surface states associated to SiOx was identified and observed for SiNPs synthesized by both BU and TD approaches. Blue-shifted excitation–emission spectra associated to a silicon core in embedded SiOx nanostructures were also identified. Theoretical studies were carried out to help understand the observed results.
format Articulo
Articulo
author Llansola Portolés, Manuel José
Pis Diez, Reinaldo
Dell'Arciprete, María Laura
Caregnato, Paula
Romero, Juan José
Mártire, Daniel Osvaldo
Azzaroni, Omar
Ceolín, Marcelo Raúl
González, Mónica Cristina
author_facet Llansola Portolés, Manuel José
Pis Diez, Reinaldo
Dell'Arciprete, María Laura
Caregnato, Paula
Romero, Juan José
Mártire, Daniel Osvaldo
Azzaroni, Omar
Ceolín, Marcelo Raúl
González, Mónica Cristina
author_sort Llansola Portolés, Manuel José
title Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
title_short Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
title_full Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
title_fullStr Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
title_full_unstemmed Understanding the Parameters Affecting the Photoluminescence of Silicon Nanoparticles
title_sort understanding the parameters affecting the photoluminescence of silicon nanoparticles
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/170195
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