Abstract
Ecofriendly synthesis of nanoparticles has been inspiring to nanotechnologists especially for biomedical applications. Moreover, anisotropic particle synthesis is an attractive option due to decreased symmetry of such particles often leads to new and unusual chemical and physical behaviour. This paper reports a single-step room-temperature synthesis of gold nanotriangles using a cheap bioresource of reducing and stabilizing agentPiper betleleaf extract. On treating aqueous chloroauric acid solution withPiper betleleaf extract, after 12 hr, complete reduction of the chloroaurate ions was observed leading to the formation of flat and single crystalline gold nanotriangles. These gold nanotriangles can be exploited in photonics, optical coating, optoelectronics, magnetism, catalysis, chemical sensing, and so forth, and are a potential candidate of SERS studies.
Highlights
The synthesis of metal and semiconductor nanoparticles has innumerable opportunities of research due to their present and future applications in biosensing [1], chemical sensing [2], recording media [3], optoelectronics [4], and catalysis [5]
We have reported on the synthesis of gold nanoparticles by the reduction of aqueous AuCl4− ions using Cymbopogon flexuosus [13], Tamarindus indica [2], Emblica officinalis [14], Terminalia catappa [15], Murraya koenigii and Citrus limonum leaf extracts [16]
In order to test whether this hypothesis is true, we have looked at the composition of other plants for possible presence of such molecules and have identified the Piper betle plant as a potential candidate for shape-controlled synthesis of gold nanoparticles
Summary
The synthesis of metal and semiconductor nanoparticles has innumerable opportunities of research due to their present and future applications in biosensing [1], chemical sensing [2], recording media [3], optoelectronics [4], and catalysis [5]. Anisotropic particles are interesting because the decreased symmetry of such particles often leads to new and unusual chemical and physical properties [7] In this context, ecofriendly biosynthesis protocols are better roadmap to avoid adverse effects of nanomaterials especially in medical applications. Use of plant extracts as a reducing and capping agent for the synthesis of nanoparticles could be advantageous over other environmentally benign biological processes by eliminating the elaborate process of maintaining cell cultures. It can be suitably scaled up for the large-scale synthesis of nanoparticles. We have reported on the synthesis of gold nanoparticles by the reduction of aqueous AuCl4− ions using Cymbopogon flexuosus [13], Tamarindus indica [2], Emblica officinalis [14], Terminalia catappa [15], Murraya koenigii and Citrus limonum leaf extracts [16]
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