Xu, Yan; Wang, Zhenbo; Ding, Caifeng; Luo, Xiliang published the artcile< Ratiometric antifouling electrochemiluminescence biosensor based on bi-functional peptides and low toxic quantum dots>, Recommanded Product: Indium(III) chloride tetrahydrate, the main research area is quantum dot peptide antifouling electrochemiluminescence biosensor.
It is a great challenge to detect the target selectively and accurately in complex biol. samples. A ratiometric signal amplification strategy based on antifouling peptide is proposed to detect thrombin (TB) in this work. The electrode is modified with conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) and Au@Luminol. Then the bi-functional peptide anchors to the modified electrode and captures the low toxic electrochemiluminescence (ECL) probe. The bi-functional peptide includes a new antifouling sequence (DRDRDRDR) and a TB recognizable sequence (SGRPVLG), while the former can greatly reduce the non-specific adsorption in complex samples and the latter can be cleaved by TB. The new self-enhanced luminescence probe labeled as PAMAM-QDs is composed of low toxic and water-soluble CuInZnS/ZnS quantum dots (CIZS/ZnS QDs) and polyamidoamine (PAMAM) via amide bonds. Concentration of TB can be obtained via the ratio of the signals of ECLQDs/ECLAu@Luminol accurately and sensitively. The ECL biosensor with the detection line 1.82 fM can work from 10 fM to 1 nM. Thanks to the antifouling property of the designed peptide and the amplification of the new ECL probe, the biosensor can be used for quantifying TB in practical complex samples with high selectivity and sensitivity.
Sensors and Actuators, B: Chemical published new progress about Bioelectric current, current-potential relationship. 22519-64-8 belongs to class chlorides-buliding-blocks, and the molecular formula is Cl3H8InO4, Recommanded Product: Indium(III) chloride tetrahydrate.
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