Aerosol Processing of Graphene and Its Application to Oil Absorbent and Glucose Biosensor

Abstract

Graphene (GR) is a flat monolayer of sp 2 -bonded single carbon atoms densely packed into a honeycomb crystal lattice. Due to its unique characteristics, GR is expected to contribute to enhanced nano-electronic, bio-electronic devices, etc. in the near future. However, the single-layered GR sheets have a tendency to form irreversible aggregates or even to restack easily due to strong attraction between sheets. Preventing of aggregation and restacking of GR is achieved by the dimensional transition from flat sheets to fractal-dimensional, nearly spherical crumpled balls using aerosol spray pyrolysis. This review first introduces the fabrication of crumpled GR and GR-composite by aerosol spray pyrolysis, and then discusses the material properties of GR: strain-hardening, compression and aggregation-resistant behavior. Finally, we introduce effective applications of hollow crumpled GR balls for oil absorbent and crumpled GR-composites for glucose biosensor, respectively.

Synergetic effect of graphene sheet and three‐dimensional crumpled graphene on the performance of dye‐sensitized solar cells

“…GO sheets in the colloidal solution were exfoliated by ultrasonic treatment for 1 h 20 min before the aerosol spray pyrolysis process. A description of the experimental procedure used for the aerosol process is available in the literature . The droplets of the colloidal solution generated by an ultrasonic atomizer were carried by argon 1.0 L/min into a pretreated tubular furnace (1073 K).…”

Perspective on Nanoparticle Technology for Biomedical Use

“…Materials being explored for non-enzymatic amperometric sensors include metals, metal oxides, complexes, and carbon nanomaterials [63]. Kim et al explored the role of graphene and reviewed its application as a glucose biosensor [64]. More recently, the same group synthesized silver-graphene-titanium dioxide nanocomposites used as a glucose biosensor [65].…”

Three-dimensional crumpled graphene-based platinum–gold alloy nanoparticle composites as superior electrocatalysts for direct methanol fuel cells

“…In our earlier works [22][23][24][25][26][27], it was demonstrated that GRbased composites with a three-dimensional (3D) morphology had a high free volume and compressive strength [22,24,27]. In addition, they could be tightly packed without significantly decreasing the accessible surface area, unlike the 2D GRbased sheets [25][26][27].…”

“…In addition, they could be tightly packed without significantly decreasing the accessible surface area, unlike the 2D GRbased sheets [25][26][27]. The fabricated 3D GR-based composites could also deliver significantly higher electron transfers and electrical conductivity in the electrocatalyst performance [24].…”

“…Synthesis of 3D GR decorated with Pt-Au alloy nanoparticles (3D-GR/PtAu) Graphene oxide (GO) colloid was prepared by the oxidation reaction of graphite powder (99.9% purity, Alfa Aesar, USA) using a modified Hummers' method [28][29][30]. Our previous studies investigated the characteristics of GO using XRD, UV, Raman, and XPS analyses to verify that the GO was successfully synthesized from graphite [26,27,31]. The colloidal mixture of GR and Pt-Au alloy nanoparticles was synthesized with H 2 PtCl 6 AE6H 2 O, HAuCl 4 AE3H 2 O, as-prepared GO colloid, and NaBH 4 as reducing agents.…”