4.8 Article

Optical and Electrochemical Applications of Silicon-Carbon Dots/Silicon Dioxide Nanocomposites

期刊

ACS NANO
卷 9, 期 1, 页码 312-319

出版社

AMER CHEMICAL SOC
DOI: 10.1021/nn504787y

关键词

SiC-dots/SiO2 nanocomposites; photoluminescent carbon dots; lithographic patterns; fuel cells; colorful glasses

资金

  1. Ministry of Science and Technology [101-2113-M-002-002-MY3]

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Various colors of photoluminescent SiC-dots/SiO2 prepared through a simple heating process have been employed for optical and electrochemical applications. Blue (B)-, green (G)-, and tan (T)-SiC-dots/SiO2 powders have been prepared from SiC-dots that had been prepared from 3-aminopropyl trimethoxysilane through a hydrothermal route by simply controlling heating at 60 degrees C for 60 min and 300 degrees C for 10 and 20 min, respectively. The B-, G-, and T-SiC-dots/SiO2 nanocomposites emit at 455, 534, and 574 nm, respectively, under excitation at 360 nm. B-, G-, and T-SiC-dots/SiO2 glass films show at least seven colors when excited at 360, 460, and 520 nm. Through a heat-induced photoluminescence (PL) change, a representative lithographic pattern of B-SiC-dots/SiO2 films has been fabricated using a near-infrared laser. The B-, G-, and T-SiC-dots/SiO2 also possess high electrocatalytic activity for the oxygen reduction reaction. Having such interesting PL and electrical properties, the stable, low-toxic, and cost-effective B-, G-, and T-SiC-dots/SiO2 nanocomposites show great economic potential in many applications such as light-emitting diodes, photoluminescent windows, and fuel cells.

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