Three-dimensional graphene nanosheet encrusted carbon micropillar arrays for electrochemical sensing

Abstract

Integrating graphene onto three-dimensional (3D) microelectrodes is a plausible technique to significantly improve the sensitivity of electrochemical devices. However, the construction of graphene coated 3D microstructures has been a considerable challenge. In this paper, we present a simple methodology using electrostatic spray deposition (ESD) to conformally coat graphene onto 3D carbon micropillars that are fabricated by pyrolyzing finely patterned photoresist. During the ESD, changes in the critical parameters such as substrate temperature, deposition time, and nozzle to substrate distance have shown a significant effect on the morphology of the deposited graphene film. The amperometric response of graphene/carbon micropillar electrode arrays exhibited higher electrochemical activity, improved charge transfer and a linear response towards H(2)O(2) detection between 250 μM and 5.5 mM. The ESD technique, with the flexibility of integrating a wide variety of functional nanomaterials onto complex 3D microstructures, is attractive in the field of electrochemistry and biotechnology.

Nanostructured Electrodes Via Electrostatic Spray Deposition for Energy Storage System

“…In this part, we will briefly review some of its applications. C-MEMS based 3D graphene nanosheets encrusted carbon micropillars by combining top-down (photo-lithography) and bottom-up processes (ESD) [28]. Graphene was successfully coated onto 3D carbon micropillars shown in Figure 6 (a).…”

C-MEMS for bio-sensing applications

“…We have focused on developing various 3D micro/nanostructures using C-MEMS technique for the last decade [7][8][9][10][11][12][13][14][15][16][17][18][19]. In this study, different functionalization methods on C-MEMS based carbon microstructure have been investigated to form a highly selective, sensitive and reproducible miniaturized bio-sensing platform.…”

Modeling and Simulation of Enzymatic Biofuel Cells with Three-Dimensional Microelectrodes

“…Our group has been focusing on developing C-MEMS-based micro/nanostructures [15][16][17][18][19][20][21][22][23], and building C-MEMS-based electrodes for EBFCs [24][25][26][27][28][29][30][31]. One of the most important concerns is to achieve direct electron transfer (DET) between the enzyme reaction site and the electrode.…”