In situnitrogen-doped graphene grown from polydimethylsiloxane by plasma enhanced chemical vapor deposition

Abstract

Due to its unique electronic properties and wide spectrum of promising applications, graphene has attracted much attention from scientists in various fields. Control and engineering of graphene's semiconducting properties is considered to be key to its applications in electronic devices. Here, we report a novel method to prepare in situ nitrogen-doped graphene by microwave plasma assisted chemical vapor deposition (CVD) using PDMS (polydimethylsiloxane) as a solid carbon source. Based on this approach, the concentration of nitrogen-doping can be easily controlled via the flow rate of nitrogen during the CVD process. X-ray photoelectron spectroscopy results indicated that the nitrogen atoms doped into the graphene lattice were mainly in the forms of pyridinic and pyrrolic structures. Moreover, first-principles calculations show that the incorporated nitrogen atoms can lead to p-type doping of graphene. This in situ approach provides a promising strategy to prepare graphene with controlled electronic properties.

Synthesis of SiC decorated carbonaceous nanorods and its hierarchical composites Si@SiC@C for high-performance lithium ion batteries

“…The Raman spectrum of S1 was depicted in Fig. 1(b), where the D band (electron decoherence in optics and transport phenomena in sp2 carbons) [24] and G band (E2g mode of graphite) [25] were observed at 1322 cm À1 and 1594 cm À1 , respectively. The two more peaks at 780 and 940 cm À1 could be assigned to the transverse optical (TO) and longitudinal optical (LO) of SiC [26e28].…”

Synthesis and electrochemical applications of nitrogen-doped carbon nanomaterials

“…Graphene is considered as an interesting, exciting, and eye-capturing two-dimensional (2-D) structure formed by the sp 2 hybridized carbon [145][146][147][148][149]. The nitrogenenriched graphene (NG) materials have been prepared by the various synthesis techniques and routes ( Figure 7) [151,152] in order to meet the desired requirements for the various electrochemical and biochemical applications [139,[153][154][155][156].…”

Sustainable process for all-carbon electrodes: Horticultural doping of natural-resource-derived nano-carbons for high-performance supercapacitors

“…The less commonly used electrochemical or plasma doping often involves dedicated equipment, high cost, and harsh conditions which can potentially damage the nanostructures and impede their mechanical, optical, electronic and electrochemical performance [12][13][14]. As a result, it is critical to develop both large-scale fabrication and doping methods for nano-carbons in a more sustainable and low cost manner.…”