A TiO2-Au–polymer hybrid system for the photoelectrochemical immunoassay of SirT1

Application of CuS-functionalized ZnO nanoflakes for a paper-based photoelectrochemical immunoassay using an in situ electron donor producing strategy

“…EIS is usually regarded as an effective method to monitor the interfacial properties of surface-modified electrodes. 43 In EIS, the impedance spectrum includes a linear portion at low frequencies representing a diffusion-limited electrochemical process, and a semicircle portion at high frequencies corresponding to an electron transfer limited process. The semicircle diameter is equal to the electron-transfer resistance, which reflects the electron transfer kinetics of redox probes at the electrode interface.…”

Gold nanorods-paper electrode based enzyme-free electrochemical immunoassay for prostate specific antigen using porous zinc oxide spheres–silver nanoparticles nanocomposites as labels

“…13,14 Gold nanoparticles (AuNPs) have been widely used in immunoassays due to their unique physical and chemical properties such as biocompatibility, long-term stability and superior conductivity. [15][16][17] Recently, one-dimensional nanomaterials, especially metal nanorods, have attracted considerable attention because they show improved signal to noise ratios, fast electron-transfer rates and high faradaic current densities. 18,19 Among the various nanorods, Au nanorods (AuNRs) are confirmed to have high surface area with efficient mass transport characteristics and favorable biocompatibility.…”