Synthesis and characterization of Ag–Pd alloy nanoparticles/carboxylated cellulose nanocrystals nanocomposites

• Published in: Carbohydrate polymers 2011, Vol.83 (1), p.38-43
• Main Authors: Liu, He, Wang, Dan, Shang, Shibin, Song, Zhanqian
• Format: Article
• Language: English
• Subjects: Ag–Pd alloy; alloys; Applied sciences; Biological and medical sciences; Biosensors; Biotechnology; cations; cellulose; Cellulose nanocrystal; Composites; DNA hybridization; Exact sciences and technology; Forms of application and semi-finished materials; Fundamental and applied biological sciences. Psychology; Methods. Procedures. Technologies; Nanocomposite; nanocomposites; nanocrystals; Nanoparticle; nanoparticles; nucleic acid hybridization; Polymer industry, paints, wood; Technology of polymers; Various methods and equipments
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2010.07.019

Synthesis of Ag–Pd alloy nanoparticles was carried out with carboxylated cellulose nanocrystals as the scaffolds by reducing metallic cations using NaBH 4. Alloy particles with a size less than 10 nm were readily prepared and dispersed well. The average size of alloy nanoparticles decreased as the increasing molar ratio of Ag/Pd. The carboxyl and hydroxyl groups of carboxylated cellulose nanocrystals supplied a coordination effect to adsorb metallic cations and alloy nanoparticles to prevent the aggregation of nanoparticles. The carboxylated cellulose nanocrystals as platforms carrying Ag–Pd alloy nanoparticles were used as labels for electrical detection of DNA hybridization.