Nanotechnology Department, Agricultural Biotechnology Research Institute of Iran, Karaj, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Aug;94:84-8. doi: 10.1016/j.saa.2012.03.041. Epub 2012 Mar 17.
In the present study, green synthesis of gold nanoparticles was reported using the aqueous extract of cypress leaves. The reduction of gold salt with the extract of cypress leaves resulted in the formation of gold nanoparticles. Effects of extract concentration and extract pH were investigated on the size of the nanoparticles. It was found that the average particle size of synthesized gold nanoparticles depends strongly on extract concentration and extract pH. FT-IR spectroscopy showed that bioorganic capping molecules were bound to the surface of particles. X-ray techniques confirmed the formation of gold nanoparticles and their crystalline structure. The inductively coupled plasma atomic emission spectroscopy analysis displayed that the reaction progress is higher than 90% at room temperature. Gold nanoparticles were mostly spherical in shape along with some irregular shapes. Cypress is an evergreen plant and its leaves are easily available in all four seasons. Also, the rate of the reaction was high and it was completed in only 10min. For these reasons, this method is cost-effective and environmentally friendly. Thus, it can be used in the synthesis of gold nanoparticles instead of chemical methods and other biosynthesis approaches.
在本研究中，我们使用柏树叶的水提物报告了金纳米粒子的绿色合成。柏树叶提取物还原金盐导致金纳米粒子的形成。考察了提取物浓度和提取物 pH 值对纳米粒子尺寸的影响。结果发现，合成的金纳米粒子的平均粒径强烈依赖于提取物浓度和提取物 pH 值。傅里叶变换红外光谱（FT-IR）表明，生物有机封端分子结合到粒子表面。X 射线技术证实了金纳米粒子的形成及其晶体结构。电感耦合等离子体原子发射光谱（ICP-AES）分析显示，在室温下反应进度高于 90%。金纳米粒子大多呈球形，还有一些不规则形状。柏木是一种常绿植物，其叶子在四季都很容易获得。此外，反应速率很高，仅需 10 分钟即可完成。由于这些原因，该方法具有成本效益且环保。因此，它可以用于金纳米粒子的合成，替代化学方法和其他生物合成方法。
