Synthesis of the Gold Nanocubes by Electrochemical Technique

Abstract

This investigation demonstrates the rapid synthesis of a large quantity of uniform-sized gold nanocubes by an electrochemical method, using a surfactant solution and acetone. A redshift is observed in ultraviolet-visible absorption spectra as the shape of gold nanoparticles changes from spherical to cubic. The selected area electron diffraction patterns reveal that the gold nanocubes are single crystalline with lattice constant a = 4.068 Å. The nanocube edge is about 30 nm long. The gold nanocubes are truncated structures, as revealed by high-resolution transmission electron microscopy analysis. The effect of acetone addition on the shape of particles is also discussed.

Monodisperse Gold–Copper Bimetallic Nanocubes: Facile One‐Step Synthesis with Controllable Size and Composition

“…[2][3][4][5][6][7] In general, monodisperse cubic NCs are of great interest as building blocks for self-assembly, a significant step towards the controlled design of novel nanostructured materials and devices. [8][9][10] Gold nanocubes have been produced using a variety of techniques, such as seed-mediated methods, [11][12][13] electrochemical techniques, [14] and polyol methods, [15,16] whilst gold-containing alloy NCs with cubic morphologies have been produced only by galvanic replacement reactions. [17] To make greater progress with the above applications, a facile, reliable synthetic procedure in terms of better productivity, monodispersity, and cube shape and size control is still highly desirable.…”

Synthesis of Trisoctahedral Gold Nanocrystals with Exposed High‐Index Facets by a Facile Chemical Method

“…In the past decade, control of the shape of metallic nanostructures has attracted intensive interest, because it may provide an effective route for tuning the electronic, magnetic, optical, or catalytic properties of metals. [1][2][3][4][5][6][7][8][9][10][11][12][13] In addition, fundamental studies of single-crystal surfaces of bulk metals have indicated that high-index facets having a high density of atomic steps, ledges, kinks, and dangling bonds usually exhibit much higher chemical-reaction activities, including catalytic activities.[14] However, crystalgrowth rates in directions perpendicular to high-index planes are usually much higher than those in directions perpendicular to low-index planes because of the high surface energy of high-index planes. As a consequence, high-index planes rapidly disappear during crystal growth, and crystals are usually enclosed by low-index facets such as {100} and {111} surfaces.…”

Enhancement and Reduction of Nonradiative Decay Process in Organic Light-Emitting Diodes by Gold Nanoparticles

“…Afterwards, nitrogen gas (Kaohsiung, Taiwan) was used to dry it. As reported earlier [19,20], the GNPs were prepared via the electrochemical method. GNPs were dispersed into the aqueous solution of PEDOT:PSS in an optimized ration as a HTL.…”