کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7791165 1500646 2014 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Green synthesis of silver and copper nanoparticles using ascorbic acid and chitosan for antimicrobial applications
ترجمه فارسی عنوان
سنتز سبز نانوذرات نقره و مس با استفاده از اسید آسکوربیک و کیتوزان برای کاربرد های ضد میکروبی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Silver and copper nanoparticles were produced by chemical reduction of their respective nitrates by ascorbic acid in the presence of chitosan using microwave heating. Particle size was shown to increase by increasing the concentration of nitrate and reducing the chitosan concentration. Surface zeta potentials were positive for all nanoparticles produced and these varied from 27.8 to 33.8 mV. Antibacterial activities of Ag, Cu, mixtures of Ag and Cu, and Ag/Cu bimetallic nanoparticles were tested using Bacillus subtilis and Escherichia coli. Of the two, B. subtilis proved more susceptible under all conditions investigated. Silver nanoparticles displayed higher activity than copper nanoparticles and mixtures of nanoparticles of the same mean particle size. However when compared on an equal concentration basis Cu nanoparticles proved more lethal to the bacteria due to a higher surface area. The highest antibacterial activity was obtained with bimetallic Ag/Cu nanoparticles with minimum inhibitory concentrations (MIC) of 0.054 and 0.076 mg/L against B. subtilis and E. coli, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 112, 4 November 2014, Pages 195-202
نویسندگان
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