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dc.contributor.author
Romero, Juan José
dc.contributor.author
Llansola Portolés, Manuel Jose
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Dell'Arciprete, Maria Laura
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Rodriguez, Hernan Bernardo
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Moore, Ana L.
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Gonzalez, Monica Cristina
dc.date.available
2016-04-18T13:52:29Z
dc.date.issued
2013-08
dc.identifier.citation
Romero, Juan José; Llansola Portolés, Manuel Jose; Dell'Arciprete, Maria Laura; Rodriguez, Hernan Bernardo; Moore, Ana L. ; et al.; Photoluminescent 1-2 nm size silicon nanoparticles: A surface-dependent system; American Chemical Society; Chemistry Of Materials; 25; 17; 8-2013; 3488-3498
dc.identifier.issn
0897-4756
dc.identifier.uri
http://hdl.handle.net/11336/5254
dc.description.abstract
The effect of derivatization and temperature on the photoluminescence of 1–2 nm size silicon particles of different origin is investigated in an attempt to understand the effect of surface on the particles’ photoluminescence. To this purpose, silicon nanoparticles were synthesized by electrochemical (top-down) and wet chemical (bottom-up) procedures. Further derivatization by silylation or sylanization yielded particles with ≡Si—C≡, ≡Si—O—Si≡, and ≡Si—O—C≡ groups at the interface. A detailed analysis of the corresponding excitation–emission matrices strongly indicates that different surface atomic arrangements contribute to the energy gap. In particular, particles with ≡Si—O—Si≡ groups at the interface show photoluminescence independent of the crystalline structure and on their further surface derivatization with different organic molecules. The lifetime and spectrum shape of all synthesized particles are invariable to changes in temperature in the range 270–330 K despite a significant reduction in the photoluminescence intensity being observed with increasing temperature; such behavior supports a thermal equilibrium between dark and bright conformations of the particles. The observed results are of importance for optimizing the use of silicon nanoparticles as optical sensors and therapeutic agents in biological systems.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Surface States
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Thermal Quenching
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Si/Sio2 Interface
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Optical Properties
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Surface Chemistry
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Físico-Química, Ciencia de los Polímeros, Electroquímica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Photoluminescent 1-2 nm size silicon nanoparticles: A surface-dependent system
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-06 15:52:43.262787-03
dc.journal.volume
25
dc.journal.number
17
dc.journal.pagination
3488-3498
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington
dc.description.fil
Fil: Romero, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Llansola Portolés, Manuel Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Dell'Arciprete, Maria Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Rodriguez, Hernan Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
dc.description.fil
Fil: Moore, Ana L. . Arizona State University; Estados Unidos
dc.description.fil
Fil: Gonzalez, Monica Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
dc.journal.title
Chemistry Of Materials
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/cm401666a
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1021/cm401666a
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/cm401666a


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