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首页> 外文期刊>Bioprocess and Biosystems Engineering >Biosynthesis of fluorescent gold nanoparticles using an edible freshwater red alga, Lemanea fluviatilis (L.) C.Ag. and antioxidant activity of biomatrix loaded nanoparticles
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Biosynthesis of fluorescent gold nanoparticles using an edible freshwater red alga, Lemanea fluviatilis (L.) C.Ag. and antioxidant activity of biomatrix loaded nanoparticles

机译:使用食用淡水红藻Lemanea fluviatilis(L.)C.Ag进行荧光金纳米颗粒的生物合成。基质的纳米颗粒的合成及抗氧化活性

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摘要

Biosynthesis of gold nanoparticles has been accomplished via reduction of an aqueous chloroauric acid solution with the dried biomass of an edible freshwater epilithic red alga, Lemanea fluviatilis (L.) C.Ag., as both reductant and stabilizer. The synthesized nanoparticles were characterized by UV-visible, powder X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), and dynamic light scattering (DLS) studies. The UV-visible spectrum of the synthesized gold nanoparticles showed the surface plasmon resonance (SPR) at around 530 nm. The powder XRD pattern furnished evidence for the formation of face-centered cubic structure of gold having average crystallite size 5.9 nm. The TEM images showed the nanoparticles to be polydispersed, nearly spherical in shape and have sizes in the range 5-15 nm. The photoluminescence spectrum of the gold nanoparticles excited at 300 nm showed blue emission at around 440 nm. Gold nanoparticles loaded within the biomatrix studied using a modified 2,2-diphenyl-1-picrylhydrazyl (DPPH) method exhibited pronounced antioxidant activity.
机译:金纳米颗粒的生物合成已通过用食用淡水表石红藻Lemanea fluviatilis(L.)C.Ag.的干燥生物质作为还原剂和稳定剂还原氯金酸水溶液来完成。通过紫外可见光,粉末X射线衍射(XRD),透射电子显微镜(TEM),傅立叶变换红外(FT-IR)和动态光散射(DLS)研究来表征合成的纳米颗粒。合成金纳米粒子的紫外-可见光谱显示在约530 nm处的表面等离振子共振(SPR)。粉末XRD图样提供了形成具有平均微晶尺寸为5.9nm的金的面心立方结构的证据。 TEM图像显示纳米颗粒是多分散的,形状接近球形,尺寸在5-15nm范围内。在300 nm处激发的金纳米颗粒的光致发光光谱在440 nm处显示蓝色发射。使用改良的2,2-二苯基-1-吡啶并肼(DPPH)方法研究的生物基质中负载的金纳米颗粒表现出明显的抗氧化活性。

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