期刊
ADVANCED FUNCTIONAL MATERIALS
卷 20, 期 7, 页码 1152-1160出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200902104
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资金
- NSFC [50902002, 20873002, 20673007, 20633010, 50821061, 20805002]
- MOST [2007CB936201]
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.
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