Effects of PACVD parameters including pulsed direct current and deposition time on nanostructured carbon coating deposited on carbon fiber fabrics

Kariminejad, Arash; Taheri-Nassaj, E.; Ghanbarian, Morteza; Hassanzadeh-Tabrizi, S.A.

doi:10.1016/j.matdes.2016.05.072

Cited by 13 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The generation of residual stress during growth can be attributed to: (i) thermal stress, which occurs because of the difference in thermal expansion coefficient between the substrate and the VGNs; (ii) ion-bombardment generated defects; and (iii) lattice mismatch between the substrate and the nanographitic layer [ 54 ]. More importantly, it is noticed that the crystallite size is inversely proportional to the intrinsic residual stress.…”

Section: Resultsmentioning

confidence: 99%

Process-specific mechanisms of vertically oriented graphene growth in plasmas

Ghosh¹,

Polaki²,

Kumar³

et al. 2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

Applications of plasma-produced vertically oriented graphene nanosheets (VGNs) rely on their unique structure and morphology, which can be tuned by the process parameters to understand the growth mechanism. Here, we report on the effect of the key process parameters such as deposition temperature, discharge power and distance from plasma source to substrate on the catalyst-free growth of VGNs in microwave plasmas. A direct evidence for the initiation of vertical growth through nanoscale graphitic islands is obtained from the temperature-dependent growth rates where the activation energy is found to be as low as 0.57 eV. It is shown that the growth rate and the structural quality of the films could be enhanced by (a) increasing the substrate temperature, (b) decreasing the distance between the microwave plasma source and the substrate, and (c) increasing the discharge power. The correlation between the wetting characteristics, morphology and structural quality is established. It is also demonstrated that morphology, crystallinity, wettability and sheet resistance of the VGNs can be varied while maintaining the same sp3 content in the film. The effects of the substrate temperature and the electric field in vertical alignment of the graphene sheets are reported. These findings help to develop and optimize the process conditions to produce VGNs tailored for applications including sensing, field emission, catalysis and energy storage.

show abstract

Section: Resultsmentioning

confidence: 99%

Process-specific mechanisms of vertically oriented graphene growth in plasmas

Ghosh¹,

Polaki²,

Kumar³

et al. 2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…These features are clearly evident from the morphological analysis (figures 1(f), 2(a) and (b)] [51]. To validate these conclusions, the sp 3 content is estimated from the following equation [7,53]:…”

Section: Raman Spectra Analysismentioning

confidence: 69%

Plasma-electric field controlled growth of oriented graphene for energy storage applications

Ghosh

Polaki

Kamruddin

et al. 2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Graphene is well known to grow as flat sheets aligned with the growth substrate. Oriented graphene structures typically normal to the substrate have recently gained major attention. Most often, normal orientation is achieved in plasma-assisted growth and is believed to be due to plasma induced in-built electric field, which is usually oriented normal to the substrate. This work focuses on the effect of in-built electric field on growth direction, morphology, interconnectedness, and physical properties of various configurations of graphene structures and reveals the unique dependence of these features on electric field orientation. It is shown that tilting of growth substrates from parallel to normal direction with respect to the direction of inbuilt plasma electric field leads to the morphological transitions from flat graphene structure, to oriented individual graphene sheets and then interconnected three-dimensional networks of oriented graphene sheets. The revealed transition of the growth orientation leads to change in wetting nature, types of defect in graphitic structures as well as affects their charge storage capacity when used as supercapacitor electrodes. This simple and versatile approach opens new opportunities for the production of potentially large batches of differently oriented and structured graphene sheets in one production run.

show abstract

“…Various modification methods have been reported for improving the surface properties of carbon fabric including thermal treatment [6], electrochemical oxidation [7], plasma treatment [8], gas-phase oxidation [9], coating treatment [10] and irradiation treatment [11]. Modification of fibers by radiation induced grafting (RIG) with high-energy is a fascinating method for imparting various functional polymeric materials for various range of applications [12].…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Teflonated Carbon Fabric by Ultrasound-Assisted Radiation Induced Grafting Copolymerization

Zubair

Nasef

Ting

et al. 2019

JEST

View full text Add to dashboard Cite

A simple and effective modification method was carried out to improve the surface properties of teflon-impregnated carbon fabric (TICF) by radiation induced grafting (RIG) of glycidyl methacrylate (GMA). The grafting reaction was carried out using an ultrasound-assisted technique in comparison with a conventional grafting technique. The degree of grafting was investigated at various reaction times for both systems. The grafting efficiency for ultrasonic-aided technique reached 85% compared to 53% in conventional grafting technique. This significant improvement is probably due to the emergence of monomers diffusion on the grafting sites caused by ultrasonically assisted grafting reaction. Scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy have provided evidences for incorporation of poly(GMA) grafts. The grafting under ultrasonic condition was proven to be more efficient and economical as indicated by the increase in DG and reduction in the homopolymer contamination accompanied by homogenous grafting and smoother surfaces in TICF.

show abstract

Effects of PACVD parameters including pulsed direct current and deposition time on nanostructured carbon coating deposited on carbon fiber fabrics

Cited by 13 publications

References 28 publications

Process-specific mechanisms of vertically oriented graphene growth in plasmas

Process-specific mechanisms of vertically oriented graphene growth in plasmas

Plasma-electric field controlled growth of oriented graphene for energy storage applications

Surface Modification of Teflonated Carbon Fabric by Ultrasound-Assisted Radiation Induced Grafting Copolymerization

Contact Info

Product

Resources

About