Structure and photoluminescence properties of carbon nanotip-vertical graphene nanohybrids

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 si...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2016-01, Vol.119 (2)
Main Authors: Wang, B. B., Zhu, K., Ostrikov, K., Shao, R. W., Zheng, K.
Format: Article
Language:English
Subjects:
Applied physics
Carbon
Chemical synthesis
CHEMICAL VAPOR DEPOSITION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Emitters
Emitters (electron)
EXCITATION
FIELD EMISSION
Field emission microscopy
FILAMENTS
GRAPHENE
HYDROGEN
METHANE
Nitrogen plasma
OPTOELECTRONIC DEVICES
Organic chemistry
PHOTOLUMINESCENCE
Properties (attributes)
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
Silicon substrates
Spectrum analysis
SUBSTRATES
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
TUNING
X-RAY PHOTOELECTRON SPECTROSCOPY
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 CH4-H2-N2 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.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4939645