resumo
Thermal sensing at the nanoscale is an attracted research field with potential applications in disparate areas from micro/nanoelectronics to nanomedicine. One of the driving forces of the research in the area is the design and fabrication of ratiometric thermometers combining materials with distinct thermometric properties. In this work, we provide an example of the combination of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin (TPFPP) and colloidal ZnS/AOT quantum dots (QDs) as luminescent ratiometric thermal sensors acting within the physiological temperature range. Taking advantage of the overlap of the absorption band of the porphyrin with the emission band of the prepared colloidal ZnS/AOT QDs, the non-covalent nanoassemblies prepared presented ratiometric temperature sensing based on the so-called inner filter effect (or radiative energy transfer). In fact, the emission band of ZnS/AOT QDs at 411 nm is more pronounced by the absorbance of TPFPP. As an optical temperature sensor the TPFPP-ZnS/AOT QDs nanoassemblies showed good temperature reversibility, with a maximum relative thermal sensitivity of 0.95% & DEG;C-1 at 50 & DEG;C.
palavras-chave
SENSITIVE DETECTION; NANOPARTICLES; NANOCRYSTALS; FLUORESCENCE; THERMOMETRY; COMPLEXES; ALDER; CO
categoria
Engineering; Instruments & Instrumentation
autores
Conceicao, P; Barata, JFB; Hernandez-Rodriguez, MA; Lacerda, PSS; Neves, MGPMS; Carlos, LD; Trindade, T
nossos autores
Joana Filipa Brites Barata
Bolseiro de pós-Doutoramento
Luís Carlos
Professor Catedrático
Miguel Andrés Hernández Rodríguez
Investigador Júnior
Paula Sofia Sarrico Lacerda
Investigador
Tito Trindade
Professor CatedráticoGrupos
G1 - Materiais Porosos e Nanossistemas
G2 - Materiais Fotónicos, Eletrónicos e Magnéticos
G4 - Materiais Renováveis e Economia Circular
Projectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Corrole based systems for luminescent thermometry at nanoscale (CORLUTNA)
agradecimentos
Thanks are due to University of Aveiro and FCT/MCTES for the financial support to CESAM (UIDP/50017/2020 + UIDB/50017/2020 + LA/P/0094/2020) , CICECO-Aveiro Institute of Materials (UIDB/50011/2020 & UIDP/50011/2020) and LAQV-REQUIMTE (UIDB/50006/2020) through national funds and, where applicable, co-financed by the FEDER, within the PT2020 Partnership Agreement, and to the Portuguese NMR Network, which partially supports the NMR spectrometers by Infrastructure Project No 022161 (co-financed by FEDER through COMPETE 2020, POCI and PORL and FCT through PIDDAC) . This work was also financially supported by the project Corlutna (POCI-01-0145-FEDER-031523 and PTDC/QUI-ORG/031523/2017) funded by FEDER, through COMPETE2020-Programa Operacional Competitividade e Internacionalizacao (POCI) , and by national funds (OE) , through FCT/MCTES. Pedro Conceicao and Paula S. S. Lacerda also thank project Corlutna for his grant BI/UI88/9085/2020 and her research contract, respectively.