Structure and photoluminescence properties of carbon nanotip-vertical graphene nanohybrids

Journal Article · Thu Jan 14 00:00:00 EST 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4939645· OSTI ID:22494896

Wang, B. B. ^[1]; Zhu, K. ^[2]; Shao, R. W.; Zheng, K. ^[3]

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1. College of Chemistry and Chemical Engineering, Chongqing University of Technology, 69 Hongguang Rd., Lijiatuo, Banan District, Chongqing 400054 (China)
2. Division of Technical Support, Institute of Physics, Chinese Academy of Science, Beijing 10091 (China)
3. Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing 100124 (China)

We report on the effective enhancement and tuning of photoluminescence (PL) by combining vertical graphene nanoflakes (VGs) and carbon nanotips (CNTPs). The VGs are grown on the vertical CNTPs by hot filament chemical vapor deposition in the methane environment, where the CNTPs are synthesized on silicon substrates by CH{sub 4}-H{sub 2}-N{sub 2} plasma-enhanced hot filament chemical vapor deposition. The results of field emission scanning electron microscopy, transmission electron microscopy, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy indicate that the VGs can be grown on the CNTP and silicon substrate surfaces with the orientation perpendicular to the surfaces of CNTPs and silicon substrates. The PL properties of VG, CNTP, and CNTP-VG structures are studied using a 325 nm line of He-Cd laser as the excitation source. The PL results indicate that the PL of VGs is enhanced by the CNTPs due to the increasing density of PL emitters, while the PL properties of the nanohybrid system can be tuned. Furthermore, the potential applications of CNTP-VG structures in optoelectronic devices are analyzed. These results contribute to the design of functional graphene-based materials and the development of next-generation optoelectronic devices.

• OSTI ID: 22494896
• Journal Information: Journal of Applied Physics, Vol. 119, Issue 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMICAL VAPOR DEPOSITION
EXCITATION
FIELD EMISSION
FILAMENTS
GRAPHENE
HYDROGEN
METHANE
OPTOELECTRONIC DEVICES
PHOTOLUMINESCENCE
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
TUNING
X-RAY PHOTOELECTRON SPECTROSCOPY