Charge transfer accelerated by internal electric field of MoS2 QDs-BiOI p-n heterojunction for high performance cathodic PEC aptasensing

Redox-induced electricity for energy scavenging and self-powered sensors

“…Thereby, many photoelectrochemical redox reactions are initiated by solar irradiance. Many sensors based on redox-based photoelectrochemical energy scavenging devices have been fabricated such as glucose sensors, 136,137 aptasensors, [138][139][140][141] immunusensors, 142 and photodetectors. 143 A hematite (Fe 2 O 3 ) nanorod-based self-powered photoelectrochemical glucose sensor was fabricated, showing excellent sensitivity and selectivity with extended stable operation.…”

“…144 A cathodic photoelectrochemical and self-powered biosensor based on a CuO-Cu 2 O nanowire array on copper (Cu) mesh (CuO-Cu 2 O NWA/CM) electrodes was fabricated for sensing PSA (prostate-specic antigen) with good sensor performances. 138 The construction and the working mechanism of the aptasensor are illustrated in Fig. 14b.…”

“…Due to the steric hindrance, in the absence of PSA, the contact area surface between the photoelectrode and dissolved oxygen (O 2 ) in the electrolyte is hampered, and consequently, the electrode active surface area is reduced, providing a degraded photocurrent response. 138 However, the aptamer-modied electrode in the presence of PSA can easily attract the PSA molecules from the analyte and build the PSA-aptamer complex to release them from the detection interface. 145 Thereby, the reduced steric hindrance signicantly increases the photocurrent intensity and by quantitative analysis, the PSA level can be detected.…”

Crystal-reconstructed BiVO4 semiconductor photoelectrochemical sensor for ultra-sensitive tumor biomarker detection

“…Recently, semiconductor photoelectrochemical (PEC) biosensors have attracted extensive attention in the fields of biomedicine and environment monitoring. [26][27][28][29][30][31][32] In semiconductor PEC biosensor systems, a specific probe is fixed on the surface of a semiconductor to capture a specific target. After light illumination, the photoelectrode will induce free electron and hole pairs.…”

“Dual Signal-On” Split-Type Aptasensor for TNF-α: Integrating MQDs/ZIF-8@ZnO NR Arrays with MB-Liposome-Mediated Signal Amplification

“…1−3 As one of the most noteworthy proinflammatory cytokines released by macrophages during acute inflammation or infection, tumor necrosis factor-α (TNF-α) mediates a wide range of biological effects including antitumor activity, infection resistance, immune regulation, and viral replication. 4,5 The normal level of TNF-α in healthy human blood is about 1.3 pg/mL. 3 Overproduction of TNF-α is found to closely correlate with numerous pathological conditions such as heart disease, autoimmune diseases, cancer, and diabetes.…”