Plasma Assisted Reduction of Graphene Oxide Films

Abstract

The past decade has seen enormous efforts in the investigation and development of reduced graphene oxide (GO) and its applications. Reduced graphene oxide (rGO) derived from GO is known to have relatively inferior electronic characteristics when compared to pristine graphene. Yet, it has its significance attributed to high-yield production from inexpensive graphite, ease of fabrication with solution processing, and thus a high potential for large-scale applications and commercialization. Amongst several available approaches for GO reduction, the mature use of plasma technologies is noteworthy. Plasma technologies credited with unique merits are well established in the field of nanotechnology and find applications across several fields. The use of plasma techniques for GO development could speed up the pathway to commercialization. In this report, we review the state-of-the-art status of plasma techniques used for the reduction of GO-films. The strength of various techniques is highlighted with a summary of the main findings in the literature. An analysis is included through the prism of chemistry and plasma physics.

A critical review on thermal conductivity enhancement of graphene-based nanofluids

“…By reducing them by a chemical or thermal method, an increase in electrical conductivity was then observed in the 1-2000 S/cm range depending on the structural quality of the studied rGO [85,87,88]. Moreover, an increase of thermal conductivity of composites and films when GO was reduced to rGO was widely reported [87,[89][90][91][92]. Such an enhancement is attributed to the increase in thermal conductivity of rGO compared to that of GO as evidenced in Table 1.…”

“…Graphene conductivity depends indeed on the extend of oxygen groups [86]. By reducing them by a chemical or thermal method, an increase in electrical conductivity was then observed in the 1-2000 S/cm range depending on the structural quality of the studied rGO [85,87,88]. Moreover, an increase of thermal conductivity of composites and films when GO was reduced to rGO was widely reported [87,[89][90][91][92].…”

Plasma treatment for enhanced functionalization of graphene nanosheets by octadecylamine

“…The graphene-like materials can be treated differently by plasma depending on the type of applied gaseous atmosphere. For instance, the plasma treatment of graphene oxide with methane can reduce the oxygen functional groups yielding reduced graphene oxide (rGO) (Hari et al, 2021). Tetrafluoromethane in plasma treatment of graphene sheets introduces more pdoping by altering the surface properties (Chen et al, 2012).…”

Applicability of Atmospheric Pressure Plasma Jet (APPJ) Discharge for the Reduction in Graphene Oxide Films and Synthesis of Carbon Nanomaterials

“…From these carbonallotropic forms, the growth and prospects of graphene have been compelling [25]. In our previous work, we highlighted the importance and scope of atmospheric plasma such as APPJ in the reduction in GO, which is one of the strategies to produce graphene films [26].…”