Visible light photoelectrochemical sensor for ultrasensitive determination of dopamine based on synergistic effect of graphene quantum dots and TiO 2 nanoparticles

Solar-induced photoelectrochemical sensing for dopamine based on TiO2 nanoparticles on g-C3N4 decorated graphene nanosheets

“…The detection limit was 0.02 μM (S/N = 3). This is comparable to that of the previous DA PEC biosensor based on graphene quantum dot decorated TiO 2 nanoparticles [10] and CdTe [11], and more excellent than those of the ECL sensors based on Au nanoclusters [32] and Ag 2 Se quantum dots [33], as well as electrochemical biosensing method based on multi-walled carbon nanotube supported cobalt nanoparticles [34]. Obviously, the proposed G-C 3 N 4 /TiO 2 based PEC biosensor shows promise for the applications in the detection of DA with high sensitivity and relatively wide linear range.…”

“…Over the past decades, a number of strategies have been documented for the quantification of DA, such as high-performance liquid chromatography [5], capillary electrophoresis [6], fluorescence [7] and electrochemical method [8,9]. In contrast, as a newly developed sensing technique, photoelectrochemical (PEC) has not been taken enough attention to the determination of DA [10,11]. Essentially, PEC technique is an evolutionary generation of the electrochemical method.…”

Ag nanoclusters could efficiently quench the photoresponse of CdS quantum dots for novel energy transfer-based photoelectrochemical bioanalysis

“…Photoelectrochemical (PEC) bioanalysis has recently gained substantial momentum for its potential in future bioanalysis (Zhao et al, 2014;Gill et al, 2008;Shu et al, 2016;Yan et al, 2015;Zhang et al, 2013c;Li et al, 2016;Tang et al, 2015). Analysts in this field are now infatuated with exploiting exquisite signaling mechanisms for innovative applications (Zhang et al, 2012b;Zhuang et al, 2015;Wang et al, 2015;Long et al, 2011;Wang et al, 2014a, Sun et al, 2015.…”

A multilayer gold nanoparticle-polydopamine hybrid membrane-modified indium tin oxide electrode for selective sensing of dopamine in the present of ascorbic acid

“…Detecting and monitoring trace level of DA are not only essential for biomedical chemistry and neurochemistry research but also for diagnostic and pathological purpose [3]. Different methods have been reported for the determination of DA such as spectrophotometry [4], fluorescence method [5,6], electrochemiluminescence [7,8], high-performance liquid chromatography (HPLC) [9,10], capillary electrophoresis [11], molecular imprinting polymer [12][13][14], complementary metal oxide semiconductor (CMOS) capacitive sensors [15,16], photoelectrochemical sensors [17,18], and electrochemical method [19][20][21]. However, traditional spectrophotometry and fluorescence methods are at ease of being interfered by related compounds.…”