resumo
The remarkable advances in molecular logic reported in the last decade demonstrate the potential of luminescent molecules for logical operations, a paradigm-changing concerning silicon-based electronics. Trivalent lanthanide (Ln(3+)) ions, with their characteristic narrow line emissions, long-lived excited states, and photostability under illumination, may improve the state-of-the-art molecular logical devices. Here, the use of monolithic silicon-based structures incorporating Ln(3+)complexes for performing logical functions is reported. Elementary logic gates (AND, INH, and DEMUX), sequential logic (KEYPAD LOCK), and arithmetic operations (HALF ADDER and HALF SUBTRACTOR) exhibiting a switching ratio >60% are demonstrated for the first time using nonwet conditions. Additionally, this is the first report showing sequential logic and arithmetic operations combining molecular Ln(3+)complexes and physical inputs. Contrary to chemical inputs, physical inputs may enable the future concatenation of distinct logical functions and reuse of the logical devices, a clear step forward toward input-output homogeneity that is precluding the integration of nowadays molecular logic devices.
palavras-chave
CYCLEN COMPLEXES; GATES; FLUORESCENCE; THERMOMETER; MEMORY; NANOPARTICLES; ELECTRONICS; OPERATIONS; DESIGN; SENSE
categoria
Materials Science; Optics
autores
Hernandez-Rodriguez, MA; Brites, CDS; Antorrena, G; Pinol, R; Cases, R; Perez-Garcia, L; Rodrigues, M; Plaza, JA; Torras, N; Diez, I; Millan, A; Carlos, LD
nossos autores
Carlos António Delgado Sousa Brites
Professor Auxiliar
Luís António Ferreira Martins Dias Carlos
Professor Catedrático