Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties

Iron-containing silicon nanoparticles were synthesized in an attempt to understand the effect of iron on the silicon nanoparticle (SiNP) photoluminescence and singlet-oxygen generation capacity. A wet chemical oxidation procedure of the sodium silicide precursor, obtained from the thermal treatment...

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Autores principales: Romero, Juan José, Wegmann, Marc, Rodríguez, Hernán Bernardo, Lillo, Rolando Cristian Rodrigo, Rubert, Aldo Alberto, Klein, Stefanie, Kotler, Mónica Lidia, Kryschi, Carola, González, Mónica Cristina
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2015
Materias:
Química
Iron
Quenching
Optical
Properties
Surface
Chemistry
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102235
https://ri.conicet.gov.ar/11336/5465
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102235
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Iron
Quenching
Optical
Properties
Surface
Chemistry
spellingShingle Química
Iron
Quenching
Optical
Properties
Surface
Chemistry
Romero, Juan José
Wegmann, Marc
Rodríguez, Hernán Bernardo
Lillo, Rolando Cristian Rodrigo
Rubert, Aldo Alberto
Klein, Stefanie
Kotler, Mónica Lidia
Kryschi, Carola
González, Mónica Cristina
Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
topic_facet Química
Iron
Quenching
Optical
Properties
Surface
Chemistry
description Iron-containing silicon nanoparticles were synthesized in an attempt to understand the effect of iron on the silicon nanoparticle (SiNP) photoluminescence and singlet-oxygen generation capacity. A wet chemical oxidation procedure of the sodium silicide precursor, obtained from the thermal treatment of a mixture of sodium, silicon, and an iron(III) organic salt under anaerobic conditions, was employed. Surface-oxidized and propylamine-terminated SiNPs were characterized using high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, time-resolved and steady-state photoluminescence, and time-correlated fluorescence anisotropy. On the basis of differences in the morphology, crystal structure, density, and photoluminescence spectrum, two distinct types of SiNPs were identified in a given synthesis batch: iron-free and iron-containing SiNPs. The results show that iron is inhomogeneously incorporated in the SiNPs leading to an efficient photoluminescence quenching. Emission arrives mainly from 2 nm size iron-free SiNPs. The nanoparticles were shown to generate singlet oxygen (1O2) upon 355 nm irradiation, though they were able to quench 1O2. Analysis of cytotoxicity using MTT assay on rat glioma C6 cells showed a strong dependence on the nature of the surface groups, as 100 μg/mL of propylamine-terminated iron-containing SiNPs leads to 85% decrease in cell viability while equal amounts of surface oxidized particles induced a 35% of cell death.
format Articulo
Preprint
author Romero, Juan José
Wegmann, Marc
Rodríguez, Hernán Bernardo
Lillo, Rolando Cristian Rodrigo
Rubert, Aldo Alberto
Klein, Stefanie
Kotler, Mónica Lidia
Kryschi, Carola
González, Mónica Cristina
author_facet Romero, Juan José
Wegmann, Marc
Rodríguez, Hernán Bernardo
Lillo, Rolando Cristian Rodrigo
Rubert, Aldo Alberto
Klein, Stefanie
Kotler, Mónica Lidia
Kryschi, Carola
González, Mónica Cristina
author_sort Romero, Juan José
title Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
title_short Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
title_full Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
title_fullStr Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
title_full_unstemmed Impact of Iron Incorporation on 2-4 nm Size Silicon Nanoparticles Properties
title_sort impact of iron incorporation on 2-4 nm size silicon nanoparticles properties
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/102235
https://ri.conicet.gov.ar/11336/5465
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