Nanostructure Transfer in Semiconductors by Ion Exchange

Abstract

We report a simple procedure for the transfer of a given nanostructure from a binary oxide semiconductor to binary chalcogenide compounds. The procedure involves two consecutive ion exchange steps performed in the gas phase and in solution. While there is a complete exchange of substance, a change in stoichiometry, and a change in crystal structure, the morphology is nearly perfectly maintained. Applying a partial exchange also allows a well-controlled manipulation of the nanostructure. Basic chemical guidelines for the ion exchange are discussed. The procedure is compatible with thin film applications.

Cation Exchange: A Versatile Tool for Nanomaterials Synthesis

“…77 These surface exchanges also provide a simple route for the creation of buffer layers to minimize lattice mismatch during overcoating procedures, preventing the formation of misfit dislocations that lead to deleterious effects on optical quality. 78 The 14 and Zn 2+ . 25,26 Furthermore, the mild reaction conditions attendant to most exchanges make it a particularly powerful strategy for accessing many nonequilibrium morphologies, crystal phases, and materials that are difficult to prepare by direct hot-injection methods.…”

Hetero-Epitaxial Anion Exchange Yields Single-Crystalline Hollow Nanoparticles

“…Schaak et al have recently examined the case as well as Dloczik and Konenkamp. 10,14 We study the anion exchange of ZnO nanoparticles with molecular sulfur precursors to form high quality ZnS nanoparticles.…”

Synthesis of Mesostructured Copper Sulfide by Cation Exchange and Liquid‐Crystal Templating

“…[2][3][4] Templating of supramolecular assemblies of surfactants and amphiphilic polymers has already proven to be a powerful technique in synthesizing various inorganic structures. Namely, numerous examples of mesostructured metal oxides (SiO 2 , TiO 2 , WO 3 , etc.)…”

“…[11][12][13][14][15][16][17] The recent developments of ion exchange within nanoparticles offer a promising approach to generating novel nanostructured inorganic materials with unique chemical compositions. Konenkamp et al [2] and Alivisatos et al [4] have successfully utilized the ion exchange methods to fully transform the chemical composition of simple nanostructured inorganic materials while retaining their shapes. Although the exact mechanism by which the ions exchange while retaining the overall structure is still shown to possess interesting optical properties, [3] therefore, successful synthesis of mesostructured Cu x S shows a broad band with λ max at 375 nm, which, according to previously published results, [20,21] is indicative of Cu 2 S nanoparticle formation.…”