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This paper described a disposable overoxidized polypyrrole/graphene/gold (OPPy/GE/Au) microelectrode by two-step electrooxidation at a three-electrode-integrated electrochemical sensor, and its application for selective determination of dopamine (DA) without the interference of ascorbic acid (AA). Compared with the bare Au electrode, OPPy/GE/Au electrode exhibits much stronger electroactivity for...
In this paper, graphene oxide (GO) was modified in-situ on an electrochemical electrode array for attachment of protein. GO suspension made from natural graphite flakes was directly dip-coated onto the Au working electrodes. Detected by cyclic voltammetry, the peak current of GO on Au electrode increased by 1µA as compared with bare gold electrode. Modified graphgene oxide (MGO) with stable active...
A specific and high-sensitive immunosensor for detecting pulmonary tuberculosis (TB) markers in human serum is presented by miniaturizing array of microelectrodes via micro electro-mechanical system (MEMS) for multi-channel electrochemical measurement. The immunosensor is consisted of six Au disk working electrodes, one Au counter electrode and one Ag/AgCl reference electrode. Semi-insulating poly(o-phenylenediamine)(PoPD)...
Surface plasmon photonic crystals can couple the incident light with surface plasmons by the periodic array of holes on the metal film. In this paper, surface plasmon photonic crystals with periodic square array of hexagon holes were fabricated. The infrared optical properties in transmittance and reflectance of the devices were tested. A sharp peak of surface plasmon resonance was observed at the...
In this study, basing on electrochemistry and MEMS technology we develop a novel biosensor with multi channels to detect three markers (hyaluronic acid (HA), Laminin (LN), type IV collagen (IV-C) ) so as to evaluate the liver disease. With MEMS technology, a chip including a CE, a RE and 6 gold electrodes is fabricated for detection of at most 6 markers simultaneously. Different antibodies of serum...
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