An intense cathodic electrochemiluminescence from carbon-nanosheets in situ grown on glassy carbon electrode and application in immunoanalysis via biometallization strategy.

An intense cathodic electrochemiluminescence (ECL) is reported from a polarized glassy carbon electrode (GCE) in peroxydisulfate solution. After the polarization in 1 M NaSO at the potential of - 3.7 V for 3 s, carbon nanosheets (C-NSs) were in situ grown on the surface of the GCE.

Wavelength-dependent photoelectrochemical response demonstrated by the determination of acetaminophen and rutin in differential molecularly imprinted polymers strategy.

Herein, the excitation wavelength-dependent responses of the molecularly imprinted polymer (MIP) photoelectrochemical (PEC) sensors were investigated, using acetaminophen (AP), rutin (RT) and perfluorooctanoate (PFOA) as the model templates, pyrrole as functional monomer, CuInS@ZnS/TiO NTs as the basic photoelectrode. With wavelength λ > 240 nm, the photocurrent of MIP enhanced at higher concentrations of PFOA. With increasing AP concentration, the photocurrents of MIP could decline with λ < 271 nm, not change at λ = 270 nm, or increase with λ > 270 nm.

A novel differential ratiometric molecularly imprinted electrochemical sensor for determination of sulfadiazine in food samples.

Herein, we report a novel differential ratiometric molecularly imprinted polymer (MIP) electrochemical sensor for sulfadiazine (SDZ). An MIP membrane with double templates, SDZ and propyl gallate (PG), was fabricated on glassy carbon electrode (GCE) modified by CuInS/ZnS nanocomposites. After adding PG in the samples as the reference, the current differences between MIP@CuInS/ZnS/GCE and non-imprinted polymer@CuInS/ZnS/GCE at the potentials of 0.