Syntheses of carbon nanomaterials by radio frequency plasma enhanced chemical vapor deposition

Qi, Jingyao; Wang, X.; Tian, Hongwei; Peng, Yujia; Liu, C.; Zheng, Weitao

doi:10.1016/j.jallcom.2009.06.122

Cited by 11 publications

(7 citation statements)

References 52 publications

(69 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, a high concentration of H radicals is unfavorable for carbon nanomaterial formation and growth, likely because sp 2 C is readily attacked by H radicals to form sp 3 structures. 22,23 In our previous study, 24 as the Ar content of the reaction atmosphere increased, the degree of graphitization increased and the content of crystal defects decreased in carbon nanomaterials. This is because Ar ions can remove the amorphous carbon on the surface of carbon nanomaterials during PECVD.…”

Section: Resultsmentioning

confidence: 83%

A high-performance supercapacitor of vertically-oriented few-layered graphene with high-density defects

Wang

Lin

et al. 2015

Nanoscale

View full text Add to dashboard Cite

Pristine graphene with a 3D structure is desired for use in graphene-based supercapacitors, yet the very poor wettability of such graphene in water has limited its practical application. Here we report a way to simultaneously realize the 3D structure and good wettability in vertically-oriented few-layered graphene (VFG) grown by plasma-enhanced chemical vapor deposition. Based on scanning and transmission electron microscopic, Raman spectroscopic, contact angle (CA) and electrochemical analyses, a mechanism to explain the improved performance of VFG-based supercapacitors by defect-stimulated increases in wettability is proposed. The CA of our VFG samples notably reduces from 131° to 73° as the content of surface defects increases, which confirms that the wettability of VFG is markedly improved with an increased density of surface defects. Electrochemical results indicate that the VFG samples with a high density of defects exhibit high specific capacities of up to 704 μF cm(-2) and a good cycling stability with about 91.2% capacitance retention after 3000 cycles. The excellent supercapacitor performance of the VFG samples with a high density of defects makes them attractive candidates for ultrathin high-performance supercapacitor electrodes.

show abstract

Section: Resultsmentioning

confidence: 83%

A high-performance supercapacitor of vertically-oriented few-layered graphene with high-density defects

Wang

Lin

et al. 2015

Nanoscale

View full text Add to dashboard Cite

show abstract

“…exhibit good field emission properties. The PECVD technique has been widely utilized for synthesizing CNTs, carbon nanowalls and FLGSs [4,[6][7][8][9]. The reported FLGSs grow vertically aligned to the substrate surface in the absence of any metallic catalyst.…”

Section: Introductionmentioning

confidence: 99%

Ar plasma treatment on few layer graphene sheets for enhancing their field emission properties

Qi¹,

Wang²,

Zheng³

et al. 2010

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Plasma treatment in Ar gas on few layer graphene sheets (FLGSs), synthesized by plasma enhanced chemical vapour deposition, has been performed for enhancing their field emission properties. The plasma etching treatment for 3 min on the FLGSs, forming an extremely sharp edge, decreases the turn-on electric field from 3.91 to 2.23 V µm−1, and increases the maximum emission current density, drawn at a field of 4.4 V µm−1, from 33 to 1330 µA cm−2. It is expected that plasma treatment provides an efficient way to improve the field emission properties of FLGSs.

show abstract

“…Recently, the commonly used thermal CVD tends to be replaced or increased the effect of hydrocarbon decomposition by hot-filament (HF-CVD), plasma-enhanced (PE-CVD), microwave-plasma (MP-CVD) or radiofrequency CVD technique [ 126 , 127 ]. Figure 17 shows some schematic apparatus of below mentioned CVD techiques.…”

Section: Chemical Vapour Deposition Methodsmentioning

confidence: 99%

Synthesis Methods of Carbon Nanotubes and Related Materials

et al. 2010

View full text Add to dashboard Cite

The challenge on carbon nanotubes is still the subject of many research groups. While in the first years the focus was on the new synthesis methods, new carbon sources and support materials, recently, the application possibilities are the principal arguments of the studies. The three main synthesis methods discussed in this review are the arc discharge, the laser ablation and the chemical vapour deposition (CVD) with a special regard to the latter one. In the early stage of the nanotube production the first two methods were utilized mainly for the production of SWNTs while the third one produced mainly MWNTs. The principle of CVD is the decomposition of various hydrocarbons over transition metal supported catalyst. Single-walled (SWNT), multi-walled (MWNT) and coiled carbon nanotubes are produced. In some case, interesting carbonaceous materials are formed during the synthesis process, such as bamboo-like tubes, onions, horn-like structures. In this paper, we refer to the progresses made in the field of the synthesis techniques of carbon nanotubes in the last decade.

show abstract

Syntheses of carbon nanomaterials by radio frequency plasma enhanced chemical vapor deposition

Cited by 11 publications

References 52 publications

A high-performance supercapacitor of vertically-oriented few-layered graphene with high-density defects

A high-performance supercapacitor of vertically-oriented few-layered graphene with high-density defects

Ar plasma treatment on few layer graphene sheets for enhancing their field emission properties

Synthesis Methods of Carbon Nanotubes and Related Materials

Contact Info

Product

Resources

About