Biotemplated Synthesis of Gold Nanoparticle-Bacteria Cellulose Nanofiber Nanocomposites and Their Application in Biosensing

被引:294
|
作者
Zhang, Taiji [1 ]
Wang, Wei [1 ]
Zhang, Dayong [1 ]
Zhang, Xinxiang [1 ]
Ma, Yurong [1 ]
Zhou, Yinglin [1 ]
Qi, Limin [1 ]
机构
[1] Peking Univ, Key Lab Biochem & Mol Engn, BNLMS,Coll Chem, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
关键词
HORSERADISH-PEROXIDASE; METAL NANOPARTICLES; CARBON NANOTUBES; HYBRID MATERIAL; COLLOIDAL GOLD; NANOWIRES; ASSEMBLIES; VIRUS; ELECTROCHEMISTRY; IMMOBILIZATION;
D O I
10.1002/adfm.200902104
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Bacteria cellulose (BC) nanofibers are used as robust biotemplates for the facile fabrication of novel gold nanoparticle (NP)-bacteria cellulose nanofiber (Au-BC) nanocomposites via a one-step method. The BC nanofibers are uniformly coated with Au NPs in aqueous suspension using poly(ethyleneimine) (PEI) as the reducing and linking agent. With the addition of different halides, Au-BC nanocomposites with different Au shell thicknesses are formed, and a possible formation mechanism is proposed by taking into account the special role played by PEI. A novel H2O2 biosensor is constructed using the obtained Au BC nanocomposites as excellent support for horseradish peroxidase (HRP) immobilization, which allows the detection of H2O2 with a detection limit lower than 1 mu M. The Au-BC nanocomposites could be further used for the immobilization of many other enzymes, and thus, may find potential applications in bioelectroanalysis and bioelectrocatalysis.
引用
收藏
页码:1152 / 1160
页数:9
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