A wavelength-resolved ratiometric photoelectrochemical technique: design and sensing applications.

ABSTRACT: In this work, a wavelength-resolved ratiometric photoelectrochemical (WR-PEC) technique was investigated and employed to construct a new type of PEC sensor with good sensitivity and anti-interference ability. The WR-PEC hybrid photoelectrodes were stepwise assembled using semiconductor quantum dots (QDs) and photoactive dyes. Under continuous irradiation, the photocurrent-wavelength (I-λ) curves reveal the dependence of the photocurrent on the wavelength. By monitoring the ratios of the two different PEC peak values, a wavelength-resolved ratiometric strategy was realized. Using CdS QDs and methylene blue (MB) as photoactive models, a dual-anodic WR-PEC sensor was established for sensitive detection of Cu²⁺. This ratiometric strategy was identified to be based on the quen

SUBMITTER: Hao Q 

PROVIDER: S-EPMC5580031 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature