Electroactive bacteria as whole-cell biosensor for sensitive detection of hydrogen peroxide

A “turn-off” photoluminescent sensor for H2O2 detection based on a zinc oxide–graphene quantum dot (ZnO–GQD) nanocomposite and the role of amine in the development of GQD

“…The H 2 O 2 is a molecule related to the degradation of some physiological functions which conduces to cardiovascular diseases, Alzheimer, atherosclerosis, cellular oxidative stress, cellular ageing and cancer. [15][16][17] For this reason, the early and precise H 2 O 2 detection is essential for an opportune diagnosis.…”

“…Numerous sensors have been developed for the H 2 O 2 detection and they are mainly based in analytic methods as electrochemical (enzymatic and non-enzymatic), high resolution chromatography, chromatography mass spectroscopy, colorimetry, capillary electrophoresis, infrared absorption spectroscopy and photoluminescence spectroscopy. 15,[18][19][20] The photoluminescent sensors offer a myriad of advantages as operative simplicity, high sensibility, high selectivity and fast response. 21,22 Recently nanomaterials (nanoclusters, nanorods, nanospheres) of noble metals as gold and silver, metal-ligand complexes, organic colourants, metals oxides nanoparticles and quantum dots of CdSe, carbon, ZnS and graphene, have been assessed as photoluminescent sensors.…”

“…Numerous sensors have been developed for the H 2 O 2 detection and they are mainly based in analytic methods as electrochemical (enzymatic and non-enzymatic), high resolution chromatography, chromatography mass spectroscopy, colorimetry, capillary electrophoresis, infrared absorption spectroscopy and photoluminescence spectroscopy. 15,18–20 The photoluminescent sensors offer a myriad of advantages as operative simplicity, high sensibility, high selectivity and fast response. 21,22…”

“…6240 spectroscopy and photoluminescence spectroscopy. 15,[18][19][20] The photoluminescent sensors offer a myriad of advantages as operative simplicity, high sensibility, high selectivity and fast response. 21,22 Recently nanomaterials (nanoclusters, nanorods, nanospheres) of noble metals as gold and silver, metal-ligand complexes, organic colourants, metals oxides nanoparticles and quantum dots of CdSe, carbon, ZnS and graphene, have been assessed as photoluminescent sensors.…”