Investigation of the Hydrogen Etching Effect of the SiC Surface on the Formation of Graphene Films

2019 ◽  
Vol 64 (12) ◽  
pp. 1843-1849
Author(s):  
S. P. Lebedev ◽  
I. S. Barash ◽  
I. A. Eliseyev ◽  
P. A. Dementev ◽  
A. A. Lebedev ◽  
...  
Keyword(s):  
Hydrogen Etching ◽  
Graphene Films ◽  
Etching Effect

Growth and characterization of porous sp2-BN films with hollow spheres under hydrogen etching effect via borazane thermal CVD

2018 ◽  
Vol 452 ◽  
pp. 314-321 ◽  
Author(s):  
Yuanpeng Chen ◽  
Hongwei Liang ◽  
Qasim Abbas ◽  
Jun Liu ◽  
Jianjun Shi ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Hydrogen Etching ◽  
Thermal Cvd ◽  
Etching Effect

Raman Studies of Graphene Films Grown on 4H-SiC Subjected to Deposition of Ni

2020 ◽  
Vol 54 (12) ◽  
pp. 1674-1677
Author(s):  
I. A. Eliseyev ◽  
V. Yu. Davydov ◽  
A. N. Smirnov ◽  
S. V. Belov ◽  
A. V. Zubov ◽  
...  
Keyword(s):  
Graphene Films

scholarly journals Study of properties and development of sensors based on graphene films grown on SiC (0001) by thermal destruction method

2018 ◽  
Vol 951 ◽  
pp. 012007 ◽  
Author(s):  
A A Lebedev ◽  
V Y Davydov ◽  
D Y Usachov ◽  
S P Lebedev ◽  
A N Smirnov ◽  
...  
Keyword(s):  
Thermal Destruction ◽  
Graphene Films

scholarly journals Vertical monolithic integration of wide- and narrow-bandgap semiconductor nanostructures on graphene films

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Youngbin Tchoe ◽  
Janghyun Jo ◽  
HoSung Kim ◽  
Heehun Kim ◽  
Hyeonjun Baek ◽  
...  
Keyword(s):  
Graphene Film ◽  
Monolithic Integration ◽  
Hybrid Nanostructures ◽  
Dual Wavelength ◽  
Multilayer Graphene ◽  
Graphene Films ◽  
Transmission Electron ◽  
Zno Nanotubes ◽  
Metal Organic ◽  
Hybrid Configuration

AbstractWe report monolithic integration of indium arsenide (InAs) nanorods and zinc oxide (ZnO) nanotubes using a multilayer graphene film as a suspended substrate, and the fabrication of dual-wavelength photodetectors with the hybrid configuration of these materials. For the hybrid nanostructures, ZnO nanotubes and InAs nanorods were grown vertically on the top and bottom surfaces of the graphene films by metal-organic vapor-phase epitaxy and molecular beam epitaxy, respectively. The structural, optical, and electrical characteristics of the hybrid nanostructures were investigated using transmission electron microscopy, spectral photoresponse analysis, and current–voltage measurements. Furthermore, the hybrid nanostructures were used to fabricate dual-wavelength photodetectors sensitive to both ultraviolet and mid-infrared wavelengths.

scholarly journals Self-Photoluminescence of Unzipped Multi-Walled Carbon Nanotubes

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1632
Author(s):  
Mengyao Chen ◽  
Xiaohua Qi ◽  
Wenna Zhang ◽  
Na Yang ◽  
Di Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Hummers Method ◽  
Light Region ◽  
Munk Function ◽  
Pristine Cnts ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Modified Hummers Method ◽  
Etching Effect

Unzipping of carbon nanotubes (CNTs) has been widely explored to obtain new nanocarbon structures with promising properties. In this work, we report that unzipping of CNTs according to the well-established modified Hummers method produces unzipped CNTs (uCNTs) that exhibit self-photoluminescence that depends on the diameter of pristine CNTs. The uCNTs were characterized using FTIR spectroscopy, XRD, XPS, and Raman spectroscopy indicating that unzipping is accompanied by the introduction of defects and oxygen-containing functional groups. The morphology of CNTs and uCNTs was determined by TEM showing longitude unzipping of CNTs. Our study shows that increasing the diameter of pristine CNTs results in decreasing the edge etching effect and decreasing the functionality of uCNTs. Based on the UV-Vis spectra, the band gap of uCNTs was calculated using the Kubelka–Munk function. The band gap of uCNTs increased with decreasing diameter of pristine CNTs. The uCNTs exhibited photoluminescence with a good emission in the visible light region. The uCNTs with the largest band gap and the highest oxygen content had the strongest fluorescence intensity. Moreover, different metal ions produced different degrees of fluorescence quenching for uCNT-15, which verified the self-photoluminescence of uCNTs.

Controllable Synthesis of Wafer‐Scale Graphene Films: Challenges, Status, and Perspectives

Small ◽  
2021 ◽  
pp. 2008017
Author(s):  
Bei Jiang ◽  
Shiwei Wang ◽  
Jingyu Sun ◽  
Zhongfan Liu
Keyword(s):  
Controllable Synthesis ◽  
Wafer Scale ◽  
Graphene Films
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