Optimization of high-yield biological synthesis of single-crystalline gold nanoplates
Optimization of high-yield biological synthesis of single-crystalline gold nanoplates
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DOI：
10.1021/jp051449n
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发表时间：
2005-08-18
影响因子：
3.3
通讯作者：
Chen, JP
中科院分区：
文献类型：
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作者：
Liu, B;Xie, J;Chen, JP
在这项工作中，单晶金纳米片是通过在室温下用马尾藻提取物还原氯金酸水溶液获得的。通过紫外可见光谱、X射线衍射、原子力显微镜和透射电子显微镜对所得金纳米片进行了表征。发现金纳米片的形成取决于许多环境因素，例如老化海藻提取物所花费的时间、反应介质的pH、反应温度、反应时间和初始反应物浓度。通过控制反应物的初始浓度，可以将金纳米片的尺寸控制在200至800 nm之间。相对于形成的纳米颗粒的总数，扁平金纳米晶体的产率高达80- 90%。
In this work, single-crystalline gold nanoplates were obtained by reducing aqueous chloroauric acid solution with the extract of Sargassum sp. (brown seaweed) at room temperature. The gold nanoplates so obtained were characterized by UV-vis spectroscopy, X-ray diffraction, atomic force microscopy, and transmission electron microscopy. The formation of gold nanoplates was found to depend on a number of environmental factors, such as the time taken to age the seaweed extract, pH of the reaction medium, reaction temperature, reaction time, and initial reactant concentrations. The size of the gold nanoplates could be controlled to between 200 and 800 nm by manipulating the initial reactant concentrations. The yield of the flat gold nanocrystals relative to the total number of nanoparticles formed was as high as similar to 80-90%.