Self-supported films of poly(methyl methacrylate) (PMMA) containing Tm-III-doped upconverting core@shell nanoparticles as high sensitivity temperature optical probe

Autor(es)

Rodrigues, Emille M. ^{[1, 2]} ; Galico, Diogo A. ^{[1, 2]} ; Mazali, Italo O. ^[1] ; Sigoli, Fernando A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Chem, Lab Funct Mat, POB 6154, BR-13083970 Campinas, SP - Brazil

^[2] Univ Ottawa, Fac Sci, Dept Chem & Biomol Sci, Ottawa, ON - Canada

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS A-PHYSICAL; v. 291, p. 1-6, JUN 1 2019.
• Citações Web of Science: 0

Resumo

In this work, we describe the synthesis, and thermal sensitivity of a composite material containing NaYbF4:Gd:Tm:Ho@NaYF4:Yb Ln-UCNP dispersed in PMMA matrix. The LIR between Tm3+ upconversion emissions at 450 and 475 nm resulted in a high relative thermal sensitivity of 2.8% K-1 at 313 K and an operational range higher than 100 K (from 200 to 313 K) which is not very explored in the literature. The upconversion emission intensity variation as a function of the pump power, provided a suggestion for the emission mechanism of Tm3+, which corroborates with the high obtained thermal sensitivity. The easy manipulation as well as its high sensitivity and large operational range shows the potential of this material to be used as thermal sensor into a temperature range of interest in aerospacial research. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/50906-9 - INCT 2014: em Materiais Complexos Funcionais (INOMAT)
• Beneficiário: Fernando Galembeck
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados
• Beneficiário: Lauro Tatsuo Kubota
• Modalidade de apoio: Auxílio à Pesquisa - Temático