resumo
The thermal gradients generated at submicrometer scale by the millions of transistors contained in integrated circuits are becoming the key limiting factor for device integration in micro- and nanoelectronics. Noncontact thermometric techniques with high-spatial resolution are, thus, essential for noninvasive off-chip characterization and heat management on Si surfaces. Here, the first ratiometric luminescent molecular thermometer implemented in a self-assembled polymer monolayer functionalized Si surface is reported. The functionalization of Si surfaces with luminescent thermometers constitutes a proof-of-concept that foretells a wide range of applications in Si-based micro- and nanostructures. The thermometric functionalization of the Si surface with Tb3+ and Eu3+ complexes leads to a thermal sensitivity up to 1.43% K-1, a cycle-recycle reliability of 98.6%, and a temperature uncertainty of less than 0.3 K. The functionalized surface presents reversible bistability that can be used as an optically active molecular demultiplexer.
palavras-chave
MOLECULAR LOGIC GATES; UPCONVERTING NANOPARTICLES; QUANTUM DOTS; TEMPERATURE; LUMINESCENCE; NANOSCALE; DEVICES; 3-AMINOPROPYLTRIETHOXYSILANE; NANOTHERMOMETRY; FLUORESCENCE
categoria
Chemistry; Science & Technology - Other Topics; Materials Science; Physics
autores
Rodrigues, M; Pinol, R; Antorrena, G; Brites, CDS; Silva, NJO; Murillo, JL; Cases, R; Diez, I; Palacio, F; Torras, N; Plaza, JA; Perez-Garcia, L; Carlos, LD; Millan, A
nossos autores
Carlos António Delgado Sousa Brites
Professor Auxiliar
Luís Carlos
Professor Catedrático
Nuno João Silva
Investigador Principalagradecimentos
Financial support from the Spanish Ministry of Science and Innovation research grants BFU2009-12763/BFI, MAT2011-259911, TEC2011-29140, and TEC2014-51940, and Project Consolider-Ingenio in Molecular Nanoscience CSD2007-00010 are gratefully acknowledged. Moreover, the work was partially developed in the scope of the project CICECO Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by Portuguese funds through the FCT/MEC and when applicable cofinanced by FEDER under the PT2020 Partnership Agreement. C.D.S.B. and N.J.O.S. thank the Portuguese Fundacao para a Ciencia e Tecnologia (FCT) for their grants (SFRH/BPD/89003/2012 and IF/01653/2013, respectively). The authors acknowledge Rosario Soares (Aveiro) and M. Tomas (Zaragoza) for support in the XRR and helpful discussions, respectively.