OICC Press International Nano Letters 2228-5326 12 1 (March 2022) 2021 11 22 A review on the plant extract mediated green syntheses of gold nanoparticles and its anti-microbial, anti-cancer and catalytic applications 10.1007/s40089-021-00358-6 EN Shib Shankar Dash Department of Chemistry, Govt. General Degree College, Salboni, Bhimpur, Paschim Medinipur, West Bengal, 721516, IN Ipsita Kumar Sen Department of Chemistry, Govt. General Degree College, Salboni, Bhimpur, Paschim Medinipur, West Bengal, 721516, IN Sandeep Kumar Dash Department of Physiology, University of Gour Banga, Malda, West Bengal, 732103, IN Journal Article 2021 11 22 Abstract Plant extracts mediated syntheses of gold nanoparticles (AuNPs) have earned renewed significance in recent times because it is bio-compatible, environmentally benign, simple and cost effective. The biomolecules present in the plant extract plays vital role to reduce chloroaurate ions (AuCl 4 − ) to metallic gold (Au 0 ) and also stabilize them in nanometric dimension. The biomolecules especially polyphenolic compounds with o - dihydroxy chelating site are highly proficient for the reduction where no additional capping agents are necessary. Plant extract mediated AuNPs also promising for their broad range of applications in the field of science and technology. In this review, we have critically discussed the green synthesis of gold nanoparticles utilizing different parts of medicinally important plants and chloroaurate ion. Phytochemicals screening of the plant extract, morphological analysis and size of the gold nanoparticles has been discussed. A possible mechanism towards the synthesis of nanoparticles, growth and their stabilization in nanoscale dimension has also explained. The catalytic, anti-microbial and anti-cancer applications of gold nanoparticles have also been described.