Preparation of silver nanoparticles on cellulose nanocrystals and the application in electrochemical detection of DNA hybridization

Abstract

Synthesis of Ag nanopaticles was carried out with carboxylated cellulose nanocrystals as the scaffolds by reducing metallic cations using NaBH 4 . Ag particles with a size less than 10 nm were readily prepared and dispersed well. The carboxyl and hydroxyl groups of carboxylated cellulose nanocrystals supplied a coordination effect to adsorb metallic cations and Ag nanoparticles, which prevent the aggregation of nanoparticles. The carboxylated cellulose nanocrystals carrying Ag nanoparticles were used as labels for electrical detection of DNA hybridization.

Cellulose nanofibrils improve dispersibility and stability of silver nanoparticles and induce production of bacterial extracellular polysaccharides

“…Because of its large surface area to volume ratio, and ease of surface modication, cellulose nanostructures have been used to stabilize AgNPs for DNA detection, 18 to improve the mechanical and antimicrobial properties of polyurethane lms, 19 or as a template to attach metallic nanoparticles. 13,16,17,20 CNFs derived from 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) mediated oxidation of rice straw cellulose with the most surface C6 hydroxyls converted to carboxyls were selected for their maximal surface charge effect in this study.…”

Preparation, Characterization, and Antimicrobial Activities of ZnO Nanoparticles/Cellulose Nanocrystal Nanocomposites

“…Nano-sized cellulose shows such outstanding properties as large aspect ratio (De Souza Lima et al 2003), good dissolvability in water (Shin et al 2008), good mechanical properties (Sturcova et al 2005), minimal thermal degradation behavior (Nishino et al 2004), and a high capacity for absorption of metallic particles (He et al 2003). They can be used in bioenergy, and in chemical, catalytic, and biomedical applications (Liu et al 2011). In most studies, CNC has been applied as a reinforcing phase to improve chemical and physical properties of matrices.…”

Cellulose/silver nanoparticles composite microspheres: eco-friendly synthesis and catalytic application

“…In addition, cellulose is easily to form porous structure which is able to control the size and shape of Ag NPs in the case of in situ synthesis. In view of the superiority of cellulose as a carrier, plenty of Ag NPs hybrid materials with different styles of cellulose scaffold including fibers (Song et al 2012;Sureshkumar et al 2010), films (Maneerung et al 2008;Marques et al 2008;Yang et al 2012), hydrogels (Cai et al 2009), and nanocrystal (Liu et al 2011;Shin et al 2008) have been prepared. Ag NPs were synthesized by chemical reduction using of additional reducing reagents (Maneerung et al 2008;Shin et al 2008) or ''greener'' approach through hydrothermal method by using cellulose itself as reductant (Cai et al 2009).…”

“…Ag NPs were synthesized by chemical reduction using of additional reducing reagents (Maneerung et al 2008;Shin et al 2008) or ''greener'' approach through hydrothermal method by using cellulose itself as reductant (Cai et al 2009). The reported cellulose/Ag composites were applied as antimicrobial materials (Sureshkumar et al 2010;Yang et al 2012), SERS substrates (Marques et al 2008), and electrochemical sensor for DNA hybridization (Liu et al 2011). However, to the best of knowledge, the catalytic performance of cellulose/Ag composites has not been reported.…”