کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
600389 1454301 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micrococcus luteus mediated dual mode synthesis of gold nanoparticles: Involvement of extracellular α-amylase and cell wall teichuronic acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Micrococcus luteus mediated dual mode synthesis of gold nanoparticles: Involvement of extracellular α-amylase and cell wall teichuronic acid
چکیده انگلیسی

In the present study we have utilized the bioreductive potential of Micrococcus luteus for the synthesis of gold nanoparticles. Biochemical and physiological analysis indicate that the biosynthesized GNPs were achieved by dual mode, involving extracellular α-amylase and cell wall teichuronic acid (TUA) of M. luteus. The biosynthetic potential of both α-amylase and TUA, after isolation from bacterium, was examined. Under optimum conditions, these biomolecules reduces Au3+ into Au0 and the resulting GNPs were found to be stable for 1 month. The synthesized GNPs were characterized by UV–VIS spectrometry, transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS). Results demonstrated that the synthesized GNPs were found to be monodispersive and spherical in shape with an average size of ∼6 nm and ∼50 nm for α-amylase and teichuronic acid, respectively. These findings suggest that M. luteus can be exploited as a potential biosource for the eco-friendly synthesis of gold nanoparticles.

Figure optionsDownload as PowerPoint slideHighlights
► Bioreductive potential of the bacterium Micrococcus luteus (NCIM: 2379) was revealed.
► Microbial α-amylase mediated synthesis of gold nanoparticles.
► Bacterial cell wall, acid mucopolysaccharide mediated synthesis of gold nanoparticles.
► Biosynthesized GNPs were characterized in high throughput techniques include TEM, DLS and FTIR.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces B: Biointerfaces - Volume 103, 1 March 2013, Pages 517–522
نویسندگان
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