Chemical Interactions of Nano Islandic Graphene Grown on Titanium Dioxide Substrates by Chemical Vapor Deposition

Date

2022-03-01

Author

Karamat, S.
Khalique, U.
Usman, Arslan
Javaid, Asad
Oral, Ahmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

137
views

0
downloads

In this work, direct growth of graphene is carried out on TiO2 (110) substrates by chemical vapor deposition. For few device applications, it is convenient to grow graphene directly on the dielectric substrates rather than metal foil to minimize transfer and surface interface defects. Raman spectrum support graphene growth on TiO2 substrate by exhibiting D and G peaks. Graphene covered the whole TiO2 substrate with few areas where higher growth of carbon atoms occurs. The contrast of SEM images clearly showed the non-homogeneous growth at some places on substrate. EDX showed the presence of carbon % for the graphene grown TiO2 (graphene-TiO2) substrate which is further supported by the atomic percentage of carbon obtained by XPS. XPS shows a shift of 0.36 eV in Fermi edge for the graphene-TiO2 as compared to bare heated TiO2 substrate which supports carbon interaction with TiO2. Atomic force microscope further provides the 3D view of graphene layers obtained on TiO2. The average height of graphene layers lies in 5-10 nm range and the size of uniform patches of same height lies in 200-600 nm range. The wide coverage of graphene obtained on TiO2 supports direct growth method for dielectrics, however, to obtain the uniform thickness over the whole substrate is still challenging.

Subject Keywords

Chemical vapor deposition, X-ray photoelectron spectroscopy, Raman spectroscopy, Graphene, Fermi edge, FEW-LAYER GRAPHENE, PHASE EXFOLIATION, BILAYER GRAPHENE, AREA SYNTHESIS, HIGH-QUALITY, CARBON, GRAPHITE, INTERFACE, SURFACE, FILMS

URI

https://hdl.handle.net/11511/96853

Journal

ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING

DOI

https://doi.org/10.1007/s13369-022-06674-z

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Kinetic investigation of chemical vapor deposition of B4C on tungsten substrate Karaman, Mustafa; Sezgi, Naime Aslı; Doğu, Timur; Ozbelge, H. Onder (2006-12-01) Production of beta-rhombohedral boron carbide (B4C) on a tungsten substrate by the chemical vapor deposition from a BCl3-H-2-CH4 gas mixture was achieved. An impinging-jet reactor was used to minimize the mass-transfer limitations on the reaction kinetics, which made a detailed kinetic investigation possible. Results of the XRD and XPS analyses showed that the solid product formed on the substrate is a rhombohedral B4C phase. Both dichloroborane and boron carbide formation rates were found to increase with ...
Catalytic partial oxidation of propylene on metal surfaces by means of quantum chemical methods Kızılkaya, Ali Can; Önal, Işık; Department of Chemical Engineering (2010) Direct, gas phase propylene epoxidation reactions are carried out on model slabs representing Ru-Cu(111) bimetallic and Cu(111) metallic catalyst surfaces with periodic Density Functional Theory (DFT) calculations. Ru-Cu(111) surface is modelled as a Cu(111) monolayer totally covering the surface of Ru(0001) surface underneath. The catalytic activity is evaluated following the generally accepted oxametallacycle mechanism. It is shown that the Ru-Cu(111) surface has a lower energy barrier (0.48 eV) for the s...
Germanium nanowire synthesis using solid precursors AKSOY, Burcu; Kalay, Yunus Eren; Ünalan, Hüsnü Emrah (2014-04-15) We report on the synthesis of single crystalline, high aspect ratio germanium (Ge) nanowires (NWs) by vapor transport method using three different solid powder precursors. Investigated precursors were either powder like germanium or powder mixtures like germanium dioxide with carbon and germanium iodide with germanium. As-grown NWs were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-Ray diffraction (XRD) and X-Ray photoelectron spectroscopy (XPS) to obtain struc...
Thermal characterization of composites of polyamide-6 and polypropylene involving boron compounds via direct pyrolysis mass spectrometry İşbaşar Afacan, Güllü Ceyda; Hacaloğlu, Jale; Yılmazer, Ülkü; Department of Polymer Science and Technology (2013) In this work, the effects of addition of boron compounds, boron phosphate (BPO4), zinc borate (ZnB), borosilicate (BSi) and lanthanum borate (LaB), on thermal degradation characteristics of composites of polyamide 6 (PA6) and polypropylene (PP) are analyzed via Direct Pyrolysis Mass Spectrometry (DP-MS) technique. The composites of PA6 involve nitrogen containing flame retardants, melamine (Me) or melamine cyanurate (MC); or phosphorus containing flame retardant, aluminum diethylphosphinate (AlPi), with or ...
Chemical vapor deposition of boron carbide Karaman, Mustafa; Özbelge, Önder; Department of Chemical Engineering (2007) Boron carbide was produced on tungsten substrate in a dual impinging-jet CVD reactor from a gas mixture of BCl3, CH4, and H2. The experimental setup was designed to minimise the effect of mass transfer on reaction kinetics, which, together with the on-line analysis of the reactor effluent by FTIR, allowed a detailed kinetic investigation possible. The phase and morphology studies of the products were made by XPS, XRD,micro hardness and SEM methods. XPS analysis showed the existence of chemical states attrib...

Citation Formats

S. Karamat, U. Khalique, A. Usman, A. Javaid, and A. Oral, “Chemical Interactions of Nano Islandic Graphene Grown on Titanium Dioxide Substrates by Chemical Vapor Deposition,” ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96853.