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Growth and Optical Properties of Nanocrystalline/Microcrystalline DiamondMultilayer Films
Jin-Long Luo,Xuan-Tong Ying,Liang-Yao Chen,Pei-Nan Wang 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
Nanocrystalline/microcrystalline diamond (NCD/MCD) multilayer film with high sp3 bonded carbon concentration and smooth surface has been successfully deposited on silicon substrate. Optimized deposition parameters based on substrate temperature modulation were adopted to grow the NCD/MCD film. The nanocrystallinity, purity and the multilayer structure were characterized by Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The smoothness of the film surface was shown by surface profile measurements and further verified by its high optical transmittance from visible to infrared band. Therefore, this newly proposed NCD/MCD multilayer film would have a variety of optical applications.
Field Emission Properties of -C:N Films Deposited on Diamond Substrates
Zong-Yi Qin,Pei-Nan Wang,Hong hen,Xuan-Tong Ying 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.2
Amorphous carbon-nitride films were grown on the nitridated diamond substrates by pulsed discharge of nitrogen gas by using graphite rods as the electrodes. The deposition parameters were optimized by monitoring the discharge plasma by optical-emission spectroscopy. It is demonstrated that the films were mainly a mixture of sp2 C-N, sp3 C-N and graphite nanocrystallites. Preliminary results show that deposited films have a cold-cathode-emission property. The threshold field for field emission is about 4.0 V/μm. The linear Fowler-Nordheim characteristic reveals that the fieldemission process is based on the tunneling mechanism.