Synthesis and Bio-Compatibility Study of Thermal-CVD Grown Graphene

2016 ◽  
Vol 15 (05n06) ◽  
pp. 1660016
Author(s):  
Mayukh Chakravarty ◽  
Rishi Sharma ◽  
Kumar Amit ◽  
Neelima Sharma ◽  
S. K. Pradhan
Keyword(s):  
Chemical Vapor ◽  
Compatibility Study ◽  
Thermal Cvd ◽  
Cvd Method ◽  
Atomic Force ◽  
Number Of Layers ◽  
Potential Applications ◽  
Grown Graphene ◽  
Sbf Solution ◽  
Bio Compatibility

Graphene based nanomaterials have attracted tremendous attention for their potential applications in various fields. In the present investigation, the growth of graphene on silicon substrate using thermal chemical vapor deposition (Thermal-CVD) method has been reported and the biocompatibility of obtained yield has been critically assessed. Raman spectra confirm the formation of graphene which was found to be the best to obtain minimal number of layers of graphene. Three prominent peaks have been observed at approximately 1360[Formula: see text]cm[Formula: see text] (D Peak), 1595[Formula: see text]cm[Formula: see text] (G Peak) and 2700[Formula: see text]cm[Formula: see text] (2D Peak). Haemolysis test and simulated body fluid (SBF) test are performed to check the biocompatibility of the synthesized graphene samples. Atomic force micrographs of the samples are taken prior and after soaking them in SBF solution to study their interaction with the fluid. Haemolysis percentage is determined using UV-Vis to determine the hemocompatible nature of the samples. The results of haemolysis and SBF test demonstrated that Thermal-CVD grown graphene samples are biocompatible.

scholarly journals Controlled Fabrication of Quality ZnO NWs/CNTs and ZnO NWs/Gr Heterostructures via Direct Two-Step CVD Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1836
Author(s):  
Nicholas Schaper ◽  
Dheyaa Alameri ◽  
Yoosuk Kim ◽  
Brian Thomas ◽  
Keith McCormack ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Materials Synthesis ◽  
Oxide Nanowires ◽  
Cvd Method ◽  
Thermal Actuators ◽  
Potential Applications ◽  
Walled Carbon Nanotubes ◽  
Scalable Production

A novel and advanced approach of growing zinc oxide nanowires (ZnO NWs) directly on single-walled carbon nanotubes (SWCNTs) and graphene (Gr) surfaces has been demonstrated through the successful formation of 1D–1D and 1D–2D heterostructure interfaces. The direct two-step chemical vapor deposition (CVD) method was utilized to ensure high-quality materials’ synthesis and scalable production of different architectures. Iron-based universal compound molecular ink was used as a catalyst in both processes (a) to form a monolayer of horizontally defined networks of SWCNTs interfaced with vertically oriented ZnO NWs and (b) to grow densely packed ZnO NWs directly on a graphene surface. We show here that our universal compound molecular ink is efficient and selective in the direct synthesis of ZnO NWs/CNTs and ZnO NWs/Gr heterostructures. Heterostructures were also selectively patterned through different fabrication techniques and grown in predefined locations, demonstrating an ability to control materials’ placement and morphology. Several characterization tools were employed to interrogate the prepared heterostructures. ZnO NWs were shown to grow uniformly over the network of SWCNTs, and much denser packed vertically oriented ZnO NWs were produced on graphene thin films. Such heterostructures can be used widely in many potential applications, such as photocatalysts, supercapacitors, solar cells, piezoelectric or thermal actuators, as well as chemical or biological sensors.

The Effects of Hydrogen Flowrate during Pre-Annealing on Graphene Growth by Chemical Vapor Deposition Using Methanol as a Liquid Carbon Precursor

2019 ◽  
Vol 290 ◽  
pp. 107-112
Author(s):  
Raed Abdalrheem ◽  
Fong Kwong Yam ◽  
Abdul Razak Ibrahim ◽  
Khi Poay Beh ◽  
Hwee San Lim ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Light Transmittance ◽  
High Hydrogen ◽  
Flow Rates ◽  
Hydrogen Flow ◽  
Number Of Layers ◽  
Crystallite Sizes ◽  
Grown Graphene

Studying an influence of several parameters on Chemical Vapor Deposition (CVD) used for graphene synthesis is crucial to optimizing the graphene quality to be Compatible with advanced devices. The effect of different hydrogen (H2) flow-rates (0, 50, 100, 150, 200, 250, and 300 sccm) during the pre-annealing process on CVD grown graphene have been reported. This study revealed that hydrogen flow rates during annealing changed the surface roughness/smoothness of the copper substrates. For high hydrogen flow rates, the smoothing effect was increased. Furthermore, the annealed graphene samples emerged a deferent number of layers because of morphological surface changes. According to Raman D- to G-band intensity ratios (ID/IG), the graphene quality was influenced by the annealing hydrogen flowrate. The visible light transmittance values of the grown graphene samples confirmed a few number of layers (mono to seven-layer). Mostly, the samples which annealed under moderate hydrogen flow rates showed less defects intensities and higher crystallite sizes.

scholarly journals Chemical Vapour Deposition of Hexagonal Boron Nitride for Two Dimensional Electronics

2018 ◽  
Vol 3 (3) ◽  
pp. 27-34 ◽  
Author(s):  
Balaji Sompalle ◽  
Jérôme Borme ◽  
Fátima Cerqueira ◽  
Tangyou Sun ◽  
Rui Campos ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Protective Coatings ◽  
Chemical Vapour ◽  
Chemical Vapor ◽  
Chamber Pressure ◽  
Single Photon Emitters ◽  
Potential Applications ◽  
Grown Graphene

Hexagonal boron nitride (h-BN) has potential applications in protective coatings, single photon emitters and as substrate for graphene electronics. In this paper, we report on the growth of h-BN by chemical vapor deposition (CVD) using ammonia borane as the precursor. Use of CVD allows controlled synthesis over large areas defined by process parameters, e.g. temperature, time, process chamber pressure and gas partial pressures. Furthermore, independently grown graphene and h-BN layers are put together to realize enhancement in electronic properties of graphene.

scholarly journals A review of microwave devices based on CVD-grown graphene with experimental demonstration

2019 ◽  
Vol 6 ◽  
pp. 8 ◽  
Author(s):  
Wei-Bing Lu ◽  
Hui Chen ◽  
Zhen-Guo Liu
Keyword(s):  
Electromagnetic Interference ◽  
Large Scale ◽  
Chemical Vapor ◽  
Microwave Frequency ◽  
Microwave Devices ◽  
Experimental Demonstration ◽  
Emi Shielding ◽  
The Past ◽  
Cvd Method ◽  
Grown Graphene

As a two-dimension planar material with zero-gap structure, graphene has a lot of outstanding properties in microwave frequency band, and the chemical vapor deposition (CVD) method can produce the large-scale graphene sheets with high quality for applications. Thus, the study about the microwave devices based on CVD-grown graphene has been aroused wide interests in the past few years. In this paper, mainly concentrating on the research by Chinese scientific groups, we review the development of microwave devices based on the CVD-grown graphene which are all validated by experiments, including attenuators, absorbers, antennas, electromagnetic interference (EMI) shielding and beam reconfiguration.

scholarly journals Direct chemical vapor deposition of graphene on plasma-etched quartz glass combined with Pt nanoparticles as an independent transparent electrode for non-enzymatic sensing of hydrogen peroxide

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20438-20444
Author(s):  
Ning Li ◽  
Yawen Yuan ◽  
Jinglei Liu ◽  
Shifeng Hou
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Vapor Deposition ◽  
Quartz Glass ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Pt Nanoparticles ◽  
Transparent Electrode ◽  
Cvd Method ◽  
Supported Platinum ◽  
Grown Graphene

In this work, chemical vapor deposition (CVD) method-grown graphene on plasma-etched quartz glass supported platinum nanoparticles (PtNPs/eQG) was constructed as an independent transparent electrode for non-enzymatic hydrogen peroxide (H2O2) detection.

Scanning probe analysis of twisted graphene grown on a graphene/silicon carbide template

2021 ◽  
Author(s):  
Yao Yao ◽  
Ryota Negishi ◽  
Daisuke Takajo ◽  
Makoto Takamura ◽  
Yoshitaka Taniyasu ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Growth Temperature ◽  
Chemical Vapor ◽  
Epitaxial Graphene ◽  
Scanning Tunneling ◽  
Atomic Force ◽  
Graphene Island ◽  
Grown Graphene ◽  
Few Layer Graphene ◽  
Twisted Graphene

Abstract Overlayer growth of graphene on an epitaxial graphene/silicon carbide (SiC) as a solid template by ethanol chemical vapor deposition is performed over a wide growth temperature range from 900 ºC to 1450 ºC. Structural analysis using atomic force and scanning tunneling microscopies reveal that graphene islands grown at 1300 ºC form hexagonal twisted bilayer graphene as a single crystal. When the growth temperature exceeds 1400 ºC, the grown graphene islands show a circular shape. Moreover, moiré patterns with different periods are observed in a single graphene island. This means that the graphene islands grown at high temperature are composed of several graphene domains with different twist angles. From these results, we conclude that graphene overlayer growth on the epitaxial graphene/SiC solid at 1300 ºC effectively synthesizes the twisted few-layer graphene with a high crystallinity.

Synthesis of Coil-Like Shape CNTs by Thermal CVD Method

2008 ◽  
Vol 55-57 ◽  
pp. 541-544
Author(s):  
U. Pakdee ◽  
N. Suttisiri ◽  
Ekachai Hoonnivathana ◽  
S. Chiangga
Keyword(s):  
Vapor Deposition ◽  
Chemical Vapor ◽  
Thermal Chemical Vapor Deposition ◽  
Sem Image ◽  
Thermal Cvd ◽  
Cvd Method ◽  
Catalytic Nanoparticles ◽  
Coil Diameter ◽  
Steel Substrates ◽  
Scanning Electron

The coil-like shape carbon nanotubes (CNTs) were synthesized on stainless steel substrates using acetylene gas (C2H2) at 750oC under pressure of 4110−× bar by thermal chemical vapor deposition (CVD) method. The formation of catalytic nanoparticles used hydrogen (H2) as the environment gas. The scanning electron microscope (SEM) image shown the average coil diameter of CNTs is 0.8µm and 0.1 nm for the average coil pitch of CNTs. The Raman spectrum shown the defect of CNTs and indicate that the carbon samples were tubes.

scholarly journals Establishment of a reliable transfer process for fabricating chemical vapor deposition-grown graphene films with advanced and repeatable electrical properties

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19846-19851 ◽  
Author(s):  
Dongyun Sun ◽  
Wei Wang ◽  
Zhaoping Liu
Keyword(s):  
Chemical Vapor Deposition ◽  
Electrical Properties ◽  
Transfer Process ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
High Quality ◽  
Cvd Method ◽  
Graphene Films ◽  
Grown Graphene ◽  
Commercial Applications

Graphene films grown by the chemical vapor deposition (CVD) method have attracted intensive attention due to their native advantages of both high quality and large quantity for commercial applications.

scholarly journals Controlled Growth of an Mo2C—Graphene Hybrid Film as an Electrode in Self-Powered Two-Sided Mo2C—Graphene/Sb2S0.42Se2.58/TiO2 Photodetectors

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1099 ◽  
Author(s):  
Zhe Kang ◽  
Zhi Zheng ◽  
Helin Wei ◽  
Zhi Zhang ◽  
Xinyu Tan ◽  
...  
Keyword(s):  
Work Function ◽  
Hybrid Film ◽  
Optoelectronic Devices ◽  
Chemical Vapor ◽  
Transparent Electrode ◽  
Metal Carbides ◽  
Cvd Method ◽  
Hole Transporting ◽  
Potential Applications ◽  
Self Powered

The monotonic work function of graphene makes it difficult to meet the electrode requirements of every device with different band structures. Two-dimensional (2D) transition metal carbides (TMCs), such as carbides in MXene, are considered good candidates for electrodes as a complement to graphene. Carbides in MXene have been used to make electrodes for use in devices such as lithium batteries. However, the small lateral size and thermal instability of carbides in MXene, synthesized by the chemically etching method, limit its application in optoelectronic devices. The chemical vapor deposition (CVD) method provides a new way to obtain high-quality ultrathin TMCs without functional groups. However, the TMCs film prepared by the CVD method tends to grow vertically during the growth process, which is disadvantageous for its application in the transparent electrode. Herein, we prepared an ultrathin Mo2C—graphene (Mo2C—Gr) hybrid film by CVD to solve the above problem. The work function of Mo2C—Gr is between that of graphene and a pure Mo2C film. The Mo2C—Gr hybrid film was selected as a transparent hole-transporting layer to fabricate novel Mo2C—Gr/Sb2S0.42Se2.58/TiO2 two-sided photodetectors. The Mo2C—Gr/Sb2S0.42Se2.58/TiO2/fluorine-doped tin oxide (FTO) device could detect light from both the FTO side and the Mo2C—Gr side. The device could realize a short response time (0.084 ms) and recovery time (0.100 ms). This work is believed to provide a powerful method for preparing Mo2C—graphene hybrid films and reveals its potential applications in optoelectronic devices.

scholarly journals Thermal decomposition and chemical vapor deposition: a comparative study of multi-layer growth of graphene on SiC(000-1)

MRS Advances ◽  
2016 ◽  
Vol 1 (55) ◽  
pp. 3667-3672 ◽  
Author(s):  
D. Convertino ◽  
A. Rossi ◽  
V. Miseikis ◽  
V. Piazza ◽  
C. Coletti
Keyword(s):  
Thermal Decomposition ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Layer Growth ◽  
Force Microscopy ◽  
Layer Graphene ◽  
Atomic Force ◽  
Grown Graphene

ABSTRACTThis work presents a comparison of the structural, chemical and electronic properties of multi-layer graphene grown on SiC(000-1) by using two different growth approaches: thermal decomposition and chemical vapor deposition (CVD). The topography of the samples was investigated by using atomic force microscopy (AFM), and scanning electron microscopy (SEM) was performed to examine the sample on a large scale. Raman spectroscopy was used to assess the crystallinity and electronic behavior of the multi-layer graphene and to estimate its thickness in a non-invasive way. While the crystallinity of the samples obtained with the two different approaches is comparable, our results indicate that the CVD method allows for a better thickness control of the grown graphene.

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