title: Sensitive detection of esculetin based on a CdSe nanoparticles-decorated poly(diallyldimethylammonium chloride)-functionalized graphene nanocomposite film.
abstract: An electrochemical sensor based on a CdSe nanoparticles (NPs)-decorated poly(diallyldimethylammonium chloride) (PDDA)-functionalized graphene (CdSe-PDDA-G) nanocomposite was fabricated for the sensitive detection of esculetin. The nanocomposite was characterized by X-ray diffraction (XRD), ultraviolet/visible spectra (UV-vis) and transmission electron microscopy (TEM). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to investigate the electrochemical behaviors of esculetin on the CdSe-PDDA-G composite film-modified glassy carbon electrode (GCE). The experimental results indicated that the incorporation of CdSe NPs with PDDA-G greatly enhanced the electrochemical response of esculetin. This electrochemical sensor displayed satisfactory analytical performance for esculetin detection over a range from 1.0 × 10(-8) to 5.0 × 10(-5) mol L(-1) with a detection limit of 4.0 × 10(-9) mol L(-1) (S/N = 3). Moreover, the sensor also exhibited good reproducibility and stability, and could be used for the detection of esculetin in real samples with satisfactory results.
authors: Department of Chemistry, Lanzhou University, Lanzhou 730000, P. R.China.
authors: Daban
authors: D
authors: Lu
authors: Yan
authors: Y
authors: Zhang
authors: Shaoxiong
authors: S
authors: Lin
authors: Letao
authors: L
authors: Wang
authors: Chunming
authors: C
authors: Wang
mesh_terms: D000498:Allyl Compounds; D019187:Cadmium Compounds; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006108:Graphite; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053761:Nanocomposites / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds; D018036:Selenium Compounds; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis / Q000379:methods; D014468:Umbelliferones / Q000032:analysis*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D000498:Allyl Compounds; D019187:Cadmium Compounds; D000644:Quaternary Ammonium Compounds; D018036:Selenium Compounds; D014468:Umbelliferones; D006108:Graphite; C508190:diallyldimethylammonium chloride; C058667:cadmium selenide; C007628:esculetin