Having components smaller than 1-100 nm, nanostructures are often classified based on their geometrical dimensions. Frankly speaking, nanostructures are divided into four distinct types:
(i) Zero dimensional structures (0D): In these nanomaterials, all three dimensions are in the range of 1 to 100 nm; One example is quantum dots.
(ii) One dimensional nanostructures (1D): In these nanomaterials, one of dimensions is limited to nanometer scale. One interesting example is nanofibers.
(iii) Two dimensional structures (2D): These nanomaterials benefit from two dimensions larger than 100 nm. Nano-coatings are the most significant example.
(iv) Three dimensional nanostructures (3D): These materials have three dimensions larger than 100 nm, but components of their microstructures are at nanoscale. Nanocrystalline or nanoporous materials are useful examples.
Each of these materials have some specific properties originating from their geometrical specifications, morphology, and aspect ratio.
Nanostructures and Nanomaterials: Synthesis, Properties, and Applications by Guozhong Cao and Ying Wang
Synthesis and Applications of Inorganic Nanostructures by Huaqiang Cao
Nanostructures: Synthesis, Functional Properties and Application edited by Thomas Tsakalakos, Ilya A. Ovid'ko and Asuri K. Vasudevan
Nanoscale Materials in Chemistry edited by Kenneth J. Klabunde
Introduction to Nanoscience and Nanotechnology by Chris Binns
Size Effects in Nanostructures, Basics and Applications edited by Victor Kuncser and Lucica Miu
Low-Dimensional Solids edited by Duncan W. Bruce, Dermot O'Hare and Richard I. Walton
Nanostructures: 0-D and 1-D
Nanostructures: 2-D and 3-D
Introduction to Nanomaterials 01
Introduction to Nanomaterials 02