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RESEARCH PRODUCT
Gold nanoparticles/electrochemically expanded graphite composite: A bifunctional platform toward glucose sensing and SERS applications
Yongming RuanJingru ChenJiu-ju FengShishi FengShishi FengGesmi MilcovichXiang XueqingYongbo HouXuexiang Wengsubject
Expanded graphiteGeneral Chemical EngineeringNanotechnology02 engineering and technology010402 general chemistryElectrochemistry01 natural sciencesAnalytical ChemistryElectron transfersymbols.namesakechemistry.chemical_compoundElectrochemistryGold nanoparticlesGraphiteBifunctionalDetection limitChemistryGlucose sensorSERS021001 nanoscience & nanotechnology0104 chemical sciencesColloidal goldSettore CHIM/09 - Farmaceutico Tecnologico ApplicativoElectrodesymbols0210 nano-technologyRaman scatteringdescription
Abstract An integrated nanogold/expanded graphite based sensor was fabricated by a former electrochemical etching of the pencil lead electrode (PLE) and a later in-situ deposition of gold nanoparticles (AuNPs). The electrochemical pretreatment of PLE (EPLE) created a 3D graphene-like surface, enhanced the electrode surface area and facilitated the electron transfer ability within 5 min without any hazardous chemicals added. The obtained AuNPs/EPLE sensor had an excellent electrochemical response to glucose with a wide linear concentration range, from 0.05 to 38 mM and 38 to 60 mM, and a low detection limit of 5 μM (S/N = 3). Furthermore, the AuNPs/EPLE sensor was successfully employed to detect the glucose in human serum samples, and the results agreed well with those measured in hospital. Finally, the sensor exhibited efficient and reproducible surface-enhanced Raman scattering activities for the probe molecules.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 |