Graphene oxide/Au nanoparticles: Synthesis, properties, and application: A mini‐review

Abstract

There has been rapid growth in research activities on the potential of graphene oxide/Au (GO:Au) composite for different applications. The GO:Au composite has been widely explored in applications such as biomedicine, electrochemical biosensors, optical limiters, and organic dye degradation. The increased interest in GO:Au for these applications is the consequence of harvesting the electronic bonding structure that is due to the formation of sp 3 C C clusters from defected sp 2 C═C and attachment of Au atoms onto the C═C carbon matrix.The defection of the sp 2 cluster of GO can be achieved by the method of improved synthesis and functionalization with Au surfactants. The current review explores an overview of the different synthesis techniques for producing GO:Au composites, which is an important factor in controlling the particle and size distribution of the composites. The electronic, electrical, and magnetic properties of GO:Au composites are covered as it relates to photochemical, memristive, and biomedical imaging applications. The low coercivity and remanence are consistent with superparamagnetic behavior. Although, GO:Aunanocomposite (NC) are widely explored for biomedicine and drug delivery applications, future applications of the composite can be useful for magnetic resonance imaging owing to the superparamagnetic behavior. The future possibilities of GO:Au-NP are promising in the field of bioimaging and electronic devices. The electrical property of GO:Au-NC can be fused with its electrochemical property for supercapacitor applications. In some cases, GO:Au-NC is used as an anchor material with conducting polymers to enhance the supercapacitor properties. Furthermore, the synthesis of mono-disperse few-layer graphene is still challenging owing to economic cost and the graphite exfoliation process. The review of GO:Au composite from a material physics perspective aims to elucidate the current trends as well the future possibilities offered by the composite for various promising applications. Novelty Statement• This review focused on the graphene oxide-gold nanocomposite which is an outstanding composite material for different applications.

On Antimicrobial Polymers: Development, Mechanism of Action, International Testing Procedures, and Applications

“…GO NPs are made of graphene oxide. GO agents are primarily used in cellular imaging, drug delivery, and cancer treatment [ 163 ]. Despite having a nanoscale size, the oxide induces oxidative stress and interacts with the cell membrane, making it toxic [ 164 ].…”

Intrinsically Conducting Polymer Composites as Active Masses in Supercapacitors

“…Graphene oxide/gold and reduced graphene oxide/gold nanoparticles have been coated/capped with ICPs with rather fuzzy conclusions regarding the role of the constituents and the obtained improvement (not talking about costs!) [ 289 ]. The advantages of nitrogen as part of an electrode material, in particular of carbonaceous materials in terms of improved performance, electronic conductance, etc., has been reviewed with a focus on polymeric carbon nitride in [ 290 ].…”

Charge transport properties of interstitially doped graphene: a first-principles study

“…Li, Ca, K, Al, Ga, In, Na, Ti, Sn, Pd [33], Fe [34], Au [33,35], Ag, Cu [35], Mn [36]), in which its transport properties can be tuned in to n-type or to p-type graphene. In particular Au and Ag doping of graphene is broadly used as an electronic device [37][38][39] while Ca doping of graphene can exhibit superconductivity [40] and is widely developed as sensors [41], as well as Algraphene used for plasmonic device [42]. However, the dopant concentration that is used for those application is either at very low concentration or becomes as a substrate.…”