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 Brites
Professor associado
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.