Carbon nanowalls deposited by inductively coupled plasma enhanced chemical vapor deposition using aluminum acetylacetonate as precursor

Morphology, Microstructure, and Hydrogen Content of Carbon Nanostructures Obtained by PECVD at Various Temperatures

“…We exemplified the first report of Naab et al [22] of hydrogen content on commercially available single-, double-, and multiwalled nanotubes and carbon nanofibers and the report of Gohier et al [23] which found values between 4 and 8 at.% of hydrogen in multiwall carbon nanotubes by using high energy of 35 MeV Cl 7+ ion beam. The hydrogen content in CNW was reported before by Jain et al [24] in percentage of 3%-5% by SIMS and Nuclear Table 1 show values ranging from 4.5 to 10%, values obtained by integrating upon depth (areal density) the spectra shown in Figure 3. They reveal that hydrogen is found in the highest amount in CNPs at 673 K with 9.7 at.%.…”

Flipping growth orientation of nanographitic structures by plasma enhanced chemical vapor deposition

“…9,24,25 However, as the growth progresses, the atomic hydrogen ( H * ) generated from the dissociation of CH4 by microwave energy also start etching the growing film. The concurrent growth and etching processes make the VGNs to gain height and decrease the number density.…”

“…Since then, several groups have explored the growth of VGNs on catalytic as well as non-catalytic metal / dielectric surfaces using various plasma based techniques such as microwave PECVD, dc plasma discharge, ICP-plasma and thermal plasma jet systems. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] In an excellent review, Bo et al 11 summarized the influence of various key process parameters on the synthesis and growth model for NGSs on various types of substrates. In spite of several existing reports, herein we note that, still there is no unique theory that could unveil the atomistic growth mechanism and give a prescription to optimize the process parameters for a given plasma source.…”

“…In short, while some of the groups have used Ar for the dilution of hydrocarbon, [23][24][25] the others employed H2 to grow VGNs. 7-10, 13, 26 A few groups had also used combination of Ar and H2 for the growth of VGNs.…”

SnO2 Nanoparticles Decorated 2D Wavy Hierarchical Carbon Nanowalls with Enhanced Photoelectrochemical Performance

“…Such intriguing free standing vertically oriented wall structures offer greater active surface area for materials functionalization, which can provide effective electron pathways and thus can be good candidates as ideal photoelectrode for PEC application. Journal of Nanomaterials One may see that the individual layers of the 2D-CNW structures are interconnected to each other to form the wavylike 2D-CNW with thickness ∼10 nm while the measured lattice fringes are about 0.36 nm, which correspond to typical lattice spacing of graphitic materials [10]. Raman spectroscopy was used to characterize the structural properties of the 2D-CNW films prepared at different P rf .…”