Superhydrophilic edge-rich graphene for the simultaneous and disposable sensing of dopamine, ascorbic acid, and uric acid

Abstract

A simple and rapid simultaneous sensing strategy of multiple biomarkers is of great importance but challenging in health diagnosis. In this study, a novel free-standing edge-rich graphene film (fs-ERG) was...

Superhydrophilicity Regulation of Carbon Nanotubes Boosting Electrochemical Biosensing for Real-time Monitoring of H2O2 Released from Living Cells

“…Hydrophilicity/hydrophobicity, as a typical surface characteristic of material, has shown great superiority in electrochemical fields. , For one thing, the surface wettability directly affects the electrochemical activities of materials as well as the microenvironment of reactive interfaces . For example, our group has reported that the hydrophilicity/hydrophobicity surfaces of metal and carbon showed enhanced electrocatalysis and electrochemical biosensing. , And for another, the hydrophobicity or hydrophilicity induces a cascade activation of intracellular proteins and genes expression, and determines cells biological behaviors, like adhesion, migration, proliferation, and differentiation in vitro. , For instance, an amphiphilic peptide including a hydrophobic region for self-assembly, a flexible linker, and a hydrophilic region served as a ligand to specifically bind integrin on the cells was used for sensitive analysis of tumor cells . Therefore, the surface hydrophilicity/hydrophobicity regulation of the electrode material would pave a noteworthy avenue for real-time monitoring of electroactive cells secretion.…”

A nonenzymatic uric acid sensor based on electrophoretically deposited Graphene/ITO electrode

“…Various types of materials have been applied for sensing development, including metallic origin materials such as Pt, [4] Al2O3, [5] MgO, [6,7] TiO2, [8] Au-SiO2 nanocomposites; [9] carbon derivative materials like carbon powder, [10] graphene, [11][12][13] carbon nanotubes, [14][15][16] and combination of them. [17][18][19] Because of its inherent properties, such as its nano-2D structure and excellent mechanical and electrical properties, graphene is one of the most promising candidates.…”

“…[17][18][19] Because of its inherent properties, such as its nano-2D structure and excellent mechanical and electrical properties, graphene is one of the most promising candidates. [11][12][13] Besides fabricating graphene material for the sensor, the electrode fabrication process plays a very important role in creating a stable electrode with high sensitivity and repeatability. However, the large 2D size is challenging, especially when using expensive chemical vapour deposition (CVD) and molecular beam epitaxy (MBE) methods.…”

“…However, the large 2D size is challenging, especially when using expensive chemical vapour deposition (CVD) and molecular beam epitaxy (MBE) methods. [11][12][13]20] Thus, finding a graphene-based nonenzymatic uric acid sensor with high sensitivity, low detection limit, and cost-effective preparation is necessary. The quantitative methods of uric acid sensors commonly used are CV and DPV.…”

“…[ 17‐19 ] Because of its inherent properties, such as its nano‐2D structure and excellent mechanical and electrical properties, graphene is one of the most promising candidates. [ 11‐13 ]…”