کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
600945 1454314 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization and comparison of antimicrobial activity of PEG/TritonX-100 capped silver nanoparticles on collagen scaffold
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Synthesis, characterization and comparison of antimicrobial activity of PEG/TritonX-100 capped silver nanoparticles on collagen scaffold
چکیده انگلیسی

Silver nanoparticles have received attention as novel antimicrobial agents. In order to study the effects of silver nanoparticles on both Gram positive and negative bacteria, the nanoparticles were synthesized via chemical reduction method using different concentrations (0.3, 0.6 and 0.9 mM) of poly(ethylene) glycol (PEG) and TritonX-100 (TX). Also, mixed PEG/TX systems with equimolar concentrations capped silver nanoparticles were synthesized and confirmed by UV–vis, fluorescence spectroscopy and particle size analysis. These coated silver nanoparticles were incorporated into collagen, lyophilized to form scaffolds and characterized by SEM, XRD, ATR-FTIR, DSC, TGA and zeta potential. Results on mechanical property of all the scaffolds displayed no significant difference in the percentage elongation at break. However, the maximum percentage of 46.67% was observed with the combinations (0.9 mM PEG + 0.9 mM TX). This implies that the combinations of surfactants increase the elasticity, which is useful for biomedical applications, e.g., heart-valve preparations. Furthermore, the antimicrobial activities of these capped silver nanoparticles homogenized with collagen were tested against both Gram positive and negative bacteria. Minimum inhibitory concentration values obtained for the combination (0.9 mM PEG + 0.9 mM TX) were found to be better than others and thus provide strong antibacterial property to the collagen scaffolds prepared for tissue regeneration applications.

Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of silver nanoparticles coated with PEG, TritonX-100 and their mixed systems.
► Physical characterization of the collagen scaffolds containing these prepared coated nanoparticles.
► Mechanical properties of these scaffolds were determined.
► Comparative antimicrobial activity against Gram positive and Gram negative bacteria.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 90, 1 February 2012, Pages 191–196
نویسندگان
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