Abstract

Nanostructures (or also known as nanomaterials) basically are the structures which have at least one dimension of the size of nanometre range (typically 1nm to 100nm). Nano-objects are frequently classified based on how many of their dimensions are on the nanoscale. Nanoscale materials frequently have distinctive optical, mechanical, thermophysical, or optical properties. This review paper briefly describes the various synthesis procedures ranging from top-down approach to bottom-up approach, adopted to synthesize nanostructures. Also, various types of nanostructures that can be formed like metal-based nanoparticle, nano porous structures, zero dimensional nanostructures, one dimensional nanostructures, two dimensional nanostructures & Bulk nanostructures are also discussed.