Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Silver nanoparticle films for metal enhanced luminescence: Toward development of plasmonic radiation detectors for medical applications

Texto completo
Autor(es):
Guidelli, Eder Jose [1] ; Ramos, Ana Paula [2] ; Baffa, Oswaldo [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Fis, BR-14040901 Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 224, p. 248-255, MAR 1 2016.
Citações Web of Science: 11
Resumo

Research on new materials and devices for medical applications is of utmost importance. Here, we report on the growth of self-assembled Layer-by-Layer (LbL) silver nanoparticles (AgNP) films that were utilized to enhance the optically stimulated luminescence (OSL) emission, and increase the sensitivity of the radiation detectors. Multilayered chitosan/AgNP films were deposited over glass and aluminum substrates, with a top deposition of crystals with radiation-induced luminescence. Samples were irradiated with X-rays and the OSL intensities were recorded. The OSL intensity increases upon increasing the number of AgNP layers, so the detection sensitivity can be tuned accordingly. There is a remarkable OSL enhancement for films deposited over glass substrates, which is attributed to a plasmonic coupling of the X-ray induced luminescent centers and the plasmons at the nanoparticle film surface. However, AgNP films deposited on aluminum substrates led to insignificant OSL enhancement. Detection sensitivity can be tuned by controlling the number of deposited AgNP layers on the glass substrates, or by controlling the distance between the nanoparticle film and the aluminum substrates. These results indicate the potential application of silver nanoparticles films for development of more sensitive and miniaturized radiation detectors for medical applications. (C) 2015 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 11/09521-8 - Luminescência opticamente estimulada em condições de ressonância plasmônica
Beneficiário:Éder José Guidelli
Linha de fomento: Bolsas no Brasil - Doutorado