Ordered Gold Nanostructure Assemblies Formed By Droplet Evaporation

Abstract

The order of gold: Ordered assemblies of gold nanostructures are produced by droplet evaporation from single‐ and two‐component systems. The ordering of the assemblies is highly dependent on the shape and size of gold nanostructures and includes nanorods, nanocubes, polyhedra, and bipyramids. The two‐photon‐excited luminescence of ordered gold nanorod assemblies is larger than that of disordered nanorod assemblies.

Colloidal Assembly: The Road from Particles to Colloidal Molecules and Crystals

“…Different geometries of gold nanoparticles were assembled by solvent drop evaporation using concentrated aqueous dispersions of particles ( Figure 3). [29] The particles were stabilized by A. Stein et al…”

A Directional Entropic Force Approach to Assemble Anisotropic Nanoparticles into Superlattices

“…The DEFA presented herein complements several assembly strategies that have been developed to create superlattices of anisotropic nanostructures including evaporationinduced [19,20] and sedimentation-based methods, [8] as well as ones based upon the manipulation of electrostatic, [21,22] entropic, [13,[23][24][25][26][27][28] block copolymer, [29,30] and biological recognition interactions. [31] However, unlike the majority of these methods, our approach yields reversible crystals with tunable lattice constants in situ.…”

Self-Assembly of Shaped Nanoparticles into Free-Standing 2D and 3D Superlattices

“…Synthesis of Au Nanocubes : Au nanocubes were prepared according to the previously reported procedure. [ 55 ] The seeds were prepared by the addition of a freshly prepared, ice-cold aqueous NaBH 4 solution (0.01 M , 0.6 mL) into an aqueous mixture solution composed of HAuCl 4 (0.01 M , 0.25 mL) and CTAB (0.1 M , 7.5 mL), followed by vigorously string for 2 min. The resulting seed solution was kept at room temperature for 1 h before use.…”

“…[ 1,2 ] These NP superlattices have shown a variety of applications in biosensing, [ 3 ] catalysis, [ 4 ] photonic crystals, [ 5 ] nanoelectronics, [ 6,7 ] and energy conversion and storage. [ 8 ] Typical strategies for the fabrication of superlattices include such as drying mediated method, [ 9 ] assembly under external fi eld (e.g., electric and magnetic fi elds), [ 10 ] and ligand directed assembly. [11][12][13][14] The spatial arrangement (i.e., symmetry, interparticle space, small 2016, 12, No.…”