An ultrasensitive photoelectrochemical immunosensor for insulin detection based on BiOBr/Ag 2 S composite by in-situ growth method with high visible-light activity

Polydopamine with Tailorable Photoelectrochemical Activities for the Highly Sensitive Immunoassay of Tumor Markers

“…Besides, a shoulder peak at 450 nm is also observed. The enhanced light absorbance corresponds to the formation of a dopamine and TiO 2 complex, which can directly transfer a photoelectron to the TiO 2 /FTO and enhance the photo-to-electron conversion efficiency . An obvious yellow color is observed on the PDA/TiO 2 /FTO; however, a very tiny change can be observed in the SEM images of TiO 2 /FTO before and after the PDA film coating.…”

Recent developments in bismuth oxyhalide-based functional nanomaterials for biomedical applications

“…BiOX nanomaterials can be roughly divided into four categories based on the effect of different modifications, including the addition of nanocarbon materials to promote electron–hole separation, 93,95–99 polymers to benefit biocompatibility, 40,51,100–106 biomolecules to improve targeting, 107,108 and photosensitizers to enhance light absorption. 109–114…”

“…BiOX nanomaterials can be roughly divided into four categories based on the effect of different modifications, including the addition of nanocarbon materials to promote electron-hole separation, 93,[95][96][97][98][99] polymers to benefit biocompatibility, 40,51,[100][101][102][103][104][105][106] biomolecules to improve targeting, 107,108 and photosensitizers to enhance light absorption. [109][110][111][112][113][114] 2.3.1 The modification of BiOX with carbon-based materials. Modified carbon nanomaterials on the surface of BiOX to form composites not only have low cost and high chemical stability but also the synergistic effect between the two materials can substantially stimulate the catalytic activity of semiconductors.…”

Preparation of Bi/BiOBr sensitized titania nanorod arrays via a one-pot solvothermal method and construction of kanamycin photoelectrochemical aptasensors

“…12 Due to the lack of selectivity in photocatalysis, it is necessary to introduce biometric elements to construct PEC sensors. 13 At present, PEC technology is combined with biomolecular recognition elements such as enzymes, 14 aptamers, 15 antigens/antibodies, 16 etc . Among them, aptamers (oligonucleotides with a specific sequence) have excellent stability, good selectivity, and high affinity with the target.…”