Nonenzymatic glucose sensor based on flower-shaped Au@Pd core-shell nanoparticles-ionic liquids composite film modified glassy carbon electrodes

被引:106
作者
Chen, Xianlan [1 ,3 ,4 ]
Pan, Hiabo [1 ,2 ,3 ,4 ]
Liu, Hongfang [1 ,4 ]
Du, Min [1 ]
机构
[1] Fuzhou Univ, Fujian Key Lab Med Instrument & Pharmaceut Techno, Fuzhou 350002, Fujian, Peoples R China
[2] Fuzhou Univ, State Key Lab Breeding Base Photocatalysis, Fuzhou 350002, Fujian, Peoples R China
[3] Fuzhou Univ, Inst Res Funct Mat, Fuzhou 350108, Fujian, Peoples R China
[4] Fuzhou Univ, Coll Chem & Chem Engn, Fuzhou 350108, Fujian, Peoples R China
关键词
Nonenzymatic glucose sensor; Flower-shaped Au@Pd core-shell nanoparticles; ILs; Seed-mediated growth method; BIMETALLIC NANOPARTICLES; TEMPERATURE; OXIDATION; WATER; FABRICATION; CATALYSTS; GROWTH;
D O I
10.1016/j.electacta.2010.10.001
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A novel nonenzymatic glucose sensor based on flower-shaped (FS) Au@Pd core-shell nanoparticles-ionic liquids (ILs i.e., trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl) imide, [P(C-6)(3)C-14][Tf2N]) composite film modified glassy carbon electrodes (GCE) was reported. The Au@Pd nanocatalysts were prepared by seed-mediated growth method, forming the three-dimensional FS nanoparticles, where tens of small Pd nanoparticles (similar to 3 nm) aggregated on gold seeds (similar to 20 nm). The FS Au@Pd nanoparticle was a good candidate for the catalytic efficiency of nanometallic surfaces because of its flower-shaped nature, which has greater adsorption capacity. XPS analysis and zeta potential indicated that the surface of Pd atoms is positively charged, profiting the oxidation process of glucose. And ILs acted as bridge connecting Au@Pd one another and bucky gel as platform within the whole nanocomposite. So the modified electrode has higher sensitivity and selectivity owing to intrinsic synergistic effects of this nanocomposite. Amperometric measurements allow observation of the electrochemical oxidation of glucose at 0.0 V (vs. Ag/AgCl), the glucose oxidation current is linear to its concentration in the range of 5 nM-0.5 mu M, and the detection limit was found to be 1.0 nM (S/N = 3). The as-prepared nonenzyme glucose sensor exhibited excellent stability, repeatability, and selectivity. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:636 / 643
页数:8
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