Show simple item record

dc.contributor.author Romero, Juan José
dc.contributor.author Llansola Portolés, Manuel Jose
dc.contributor.author Dell'Arciprete, Maria Laura
dc.contributor.author Rodriguez, Hernan Bernardo
dc.contributor.author Moore, Ana L.
dc.contributor.author 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
dc.subject THERMAL QUENCHING
dc.subject Si/SiO2 INTERFACE
dc.subject OPTICAL PROPERTIES
dc.subject SURFACE CHEMISTRY
dc.subject.classification Físico-Química, Ciencia de los Polímeros, Electroquímica
dc.subject.classification Ciencias Químicas
dc.subject.classification 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/http://dx.doi.org/10.1021/cm401666a
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/10.1021/cm401666a


Archivos asociados

Icon
Blocked Acceso no disponible

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)