Poly(diallyldimethylammonium chloride)–cellulose nanocrystals supported Au nanoparticles for nonenzymatic glucose sensing. Issue 8 (15th January 2016)

• Record Type: Journal Article
• Authors: Dong, Lili; Zhang, Xiuqiang; Ren, Suxia; Lei, Tingzhou; Sun, Xiuxuan; Qi, Yadong; Wu, Qinglin
• Is Part Of: RSC advances. Volume 6:Issue 8(2016)
• Page Start: 6436
• Page End: 6442
• Publication Date: 2016-01-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23935d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : PDDA–CNCs supported Au nanohybrids, which were prepared by in-situ deposition of Au NPs, via the self-assembly between negative Au precursor and positively charged PDDA–CNCs, exhibited excellent electrochemical glucose sensing ability. Abstract : Poly(diallyldimethylammonium chloride)–cellulose nanocrystal (PDDA–CNC) supported Au nanohybrids were prepared by in situ deposition, via the self-assembly between negative Au precursor and positively charged functional groups of PDDA–CNC. The Au/PDDA–CNC nanohybrids were characterized for their structural properties and for glucose sensing. Characterization studies show that the synthesis protocol led to well distribution of Au nanoparticles with a mean particle size varying from 3.5 to 8.4 nm on the PDDA–CNC support matrix depending on the Au concentration. The 5Au/PDDA–CNCs ( i.e., Au loading level of 5 wt%) exhibited the best glucose sensing ability with a low detection limit of 2.4 μM (S/N = 3), high sensitivity of 62.8 μA mM −1 cm −2, a linear detection range from 0.004 mM to 6.5 mM, which was ascribed to the moderate size and dispersity of the Au nanoparticles. Further investigation revealed that the 5Au/PDDA–CNC nanohybrids also showed high selectivity and stability. These results suggest a new utilization route of CNCs decorated with metal nanoparticles in electrochemical biosensing.