A photoelectrochemical sensor based on CdS-polyamidoamine nano-composite film for cell capture and detection

Photoelectrochemical sensing of glucose based on quantum dot and enzyme nanocomposites

“…The photocurrent is generated by the electron transfer from the conduction band of QDs to the electrodes (or the electron transfer from electrodes to valence band of QDs) [32]. So, coupling of the biomolecule/QDs hybrids to electrodes could lead to photoelectrochemical phenomena that follow biological transformations, which might be used as photoelectrochemical labels for biosensing events [13,14,[33][34][35][36][37]. It has been reported that the QDs/acetylcholine esterase (AChE) conjugates were covalently linked to a cysteic acid monolayer-functionalized Au electrode and can be used for the photoelectrochemical sensing of the AChE inhibitors [13].…”

Photoelectrochemical biosensing platform for microRNA detection based on in situ producing electron donor from apoferritin-encapsulated ascorbic acid

“…In EIS measurements, the electron-transfer resistance (R et ) which was equal to the semicircle diameter reflected the restricted diffusion of the redox probe through the multilayer system related directly to the film permeability (Qian et al, 2010). Fig.…”

Aptamer based photoelectrochemical cytosensor with layer-by-layer assembly of CdSe semiconductor nanoparticles as photoelectrochemically active species

“…Among various cytosensors developed so far, many of them focus on the recognition of antibodies (Jayasena et al, 1999) and mannosyl groups Qian et al, 2010) on the cell surface. The former method suffered from the drawback of expensive, time-consuming and immunogenicity, while the latter one which depended on the recognition ability of lectin concanavalin A suffered from poor specificity and could not distinguish between cancer cells and healthy cells.…”