Nanocrystal Superlattices

Abstract

Ordered arrays, or superlattices, of metallic, insulating, or semiconducting quantum dots, represent an exciting new class of materials. These superlattices are often referred to as artificial solids, in which the nanocrystals take the place of atoms in traditional solids, and the packing arrangement of the nanocrystals determines the unit cell parameters of the superstructure. In this review, we discuss various approaches toward assembling nanocrystal superlattices and we discuss their physical properties.

Dielectric relaxation behavior of colloidal suspensions of palladium nanoparticle chains dispersed in PVP/EG solution

“…Metallic or inorganic nanoparticle ͑NP͒ assemblies have been intensively investigated in recent years, not only because they can yield collective physicochemical properties that are evidently different from single NPs as a result of their specific particle size, spacing, and organized structure, [1][2][3] but also because of their potential applications in electronic and photonic devices, telecommunications, and sensors. 4 Tremendous efforts have thus been devoted to the preparation of a variety of NP assemblies with different size and well-defined morphologies, for instance, see Refs.…”

Temperature dependence of the electron diffusion coefficient in electrolyte-filledTiO2nanoparticle films: Evidence against multiple trapping in exponential conduction-band tails

“…Research on electronic properties of porous materials includes theoretical work on quantum percolation, [8][9][10] which applies when porosity has an atomic length scale, and studies of Coulomb-blockaded semiclassical transport on porous lattices that reveals analogies with phase transitions. [11][12][13] In the present paper, we study the diffusion of photogenerated electrons in mesoporous titania. The electrolyte, which fills the pores, is not only essential to the application of this material in solar cells, but also appears to passivate defects that greatly retard electron transport in "dry" mesoporous titania.…”

Template‐Free Supracolloidal Self‐Assembly of Atomically Precise Gold Nanoclusters: From 2D Colloidal Crystals to Spherical Capsids

“…[8] In the next larger length scale, colloids have allowed superlattices, superparticles, colloidosomes, protein-like assemblies, patchy particles, directional colloids with "valence", and colloidal chains. [9][10][11][12][13][14][15][16][17] However, achieving strictly defined colloidal building blocks for self-assemblies is highly challenging. [18] That a monodispersity of colloidal units and the underlying controlled interactions could lead to novel assemblies, is exemplified by co-assemblies of icosahedral viruses with small gold nanoparticles, where the monodispersity and the interactions of the viral capsids control the colloidal crystalline packing.…”