title: Green synthesis of biocompatible carboxylic curdlan-capped gold nanoparticles and its interaction with protein.
abstract: This study demonstrates a facile, green strategy for the preparation of gold nanoparticles (AuNPs) from chloroauric acid (HAuCl4) using carboxylic curdlan (Cc) as both reducing and stabilizing agent. The as-prepared AuNPs are characterized by UV-vis spectroscopy, high resolution transmission electron microscopy, X-ray diffraction, energy dispersive X-ray spectrometry and Fourier transform infrared spectroscopy. The results indicated that the particle size of the AuNPs changes with variations in the reaction time and concentrations of Cc and HAuCl4. The spherical AuNPs are well dispersed, exhibiting high stability even after six months storage. The carboxylic groups (COO(-)) in the Cc molecules tend to adsorb and stabilize the surface of the AuNPs. The interaction between BSA and the Cc-capped AuNPs was investigated using fluorescence and circular dichroism spectroscopies. The results indicated that the BSA molecules adsorb on the surface of the AuNPs, without significant change in its helical structure even after conjugation with the AuNPs.
authors.affiliation: School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address: jkyan_27@163.com.
authors.forename: Jing-Kun
authors.initials: JK
authors.lastname: Yan
authors.affiliation: School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Jin-Lin
authors.initials: JL
authors.lastname: Liu
authors.affiliation: School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Yu-Jia
authors.initials: YJ
authors.lastname: Sun
authors.affiliation: School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Tang
authors.affiliation: School of Food & Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Zheng-Ying
authors.initials: ZY
authors.lastname: Mo
authors.affiliation: Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. Electronic address: keysliu@ust.hk.
authors.forename: Yuan-Shuai
authors.initials: YS
authors.lastname: Liu
mesh_terms: D000818:Animals; D002264:Carboxylic Acids / Q000737:chemistry*; D002417:Cattle; D060326:Chemistry Techniques, Synthetic; D002712:Chlorides / Q000737:chemistry; D006046:Gold / Q000737:chemistry* / Q000378:metabolism*; D017612:Gold Compounds / Q000737:chemistry; D055772:Green Chemistry Technology; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000378:metabolism*; D047071:beta-Glucans / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D002712:Chlorides; D017612:Gold Compounds; D047071:beta-Glucans; D012710:Serum Albumin, Bovine; C038459:curdlan; D006046:Gold; C024568:gold tetrachloride, acid
keywords: Carboxylic curdlan; Gold nanoparticles; Green synthesis; Protein-nanoparticle interaction; Structure