Gold nanotriangles biologically synthesized using tamarind leaf extract and potential application in vapor sensing
Gold nanotriangles biologically synthesized using tamarind leaf extract and potential application in vapor sensing
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DOI：
10.1081/sim-200047527
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发表时间：
2005-01-01
影响因子：
--
通讯作者：
Sastry, M
中科院分区：
文献类型：
--
作者：
Ankamwar, B;Chaudhary, M;Sastry, M
金属纳米粒子的尺寸和形状依赖的电子和化学性质已经引起了化学家，物理学家，生物学家和工程师的注意，他们希望将其用于新一代纳米器件的开发。在这篇文章中，我们报告了使用罗望子叶提取物作为还原剂的金纳米三角形的合成。在用罗望子叶提取物处理氯金酸水溶液时，观察到氯金酸根离子的快速还原，导致形成平坦且薄的单晶金纳米三角形。对金纳米三角的原子力显微镜分析表明，它们的厚度范围为20至40 nm。这些具有独特和高度各向异性平面形状的金纳米三角形可能会在光子学，光电子学和光学传感中找到应用。我们研究了不同的有机溶剂蒸气，如甲醇，苯和丙酮对罗望子叶提取物还原金纳米三角形的电导率的影响。在这些有机溶剂蒸气的存在下进行这些纳米三角形的I-V特性测量。所观察到的特性表明金纳米三角形在未来化学传感器中的应用。
The size and shape dependent electronic and chemical properties of metal nanoparticles has drawn the attention of chemists, physicists, biologists, and engineers who wish to use them for the development of new generation nanodevices. In this article, we report the synthesis of gold nanotriangles using tamarind leaf extract as the reducing agent. On treating aqueous chloroauric acid solution with tamarind leaf extract, rapid reduction of the chloroaurate ions is observed leading to the formation of flat and thin single crystalline gold nanotriangles. Atomic force microscopy analysis of the gold nanotriangles indicated that they ranged in thickness from 20 to 40 nm. These gold nanotriangles with unique and highly anisotropic planer shapes might find application in photonics, optoelectronics, and optical sensing. We investigated the effect of different organic solvent vapors like methanol, benzene and acetone on the conductivity of tamarind leaf extract reduced gold nanotriangles. I-V characteristics measurement of these nanotriangles was done in presence of these organic solvent vapors. The observed characteristics suggest the application of gold nanotriangles to future chemical sensors.