Selective deposition of nanocrystalline carbon films on GaN diodes in photocatalytic reactions

• DOI: 10.1039/c4ce01431f
• Publication Date: 2014-09-09T11:49:30Z
• Authors: G. D. Yang; F. Liu; L. Wang; W. T. Wang; D. Wang; C.-S. Jiang; M. M. Al-Jassim
• Keywords: Carbon fibers; Nanocrystalline material; Deposition

Crystalline carbon films are promising in many applications. However, traditional film deposition methods limited by involving ultra-high voltage or complicated equipment. In this study, we demonstrate a simple photocatalytic approach to crystalline fabrication. The is selectively deposited on the anode side of GaN diode chip immersed mixture CH3OH and H2O2 with sunlight as only energy source. Diamond flat hexagonal crystallites observed scanning electron microscopy (SEM). Energy-dispersive X-ray (EDX), Raman Fourier transform infrared (FTIR) spectra further confirm that diamond graphite were successfully prepared. Detailed theoretical analysis shows both photon-generated holes play important roles formation. Compared approaches, new easy realize at low cost, has selectivity side, requires no strong electric fields. Thus, our novel for preparing carbon.