Temperature and pH influences on the structural and the emission properties of electrodeposited CdSe nanowires

Abstract

Cadmium selenite (CdSe) nanowires have been electrodeposited by potentiostatic method using polycarbonate membranes as template. For the same potential value, the pH modification of the solution or the temperature variation of the substrate leads to drastic differences of the CdSe composition. A meticulous study of the influence of both temperature and pH value on the stoichiometry of electrodeposited CdSe nanowires has been done and several combinations of temperature/pH leading to the 50-50 CdSe composition have been found. The as-electrodeposited CdSe nanowires under these specific conditions reveal a good crystallinity with a <111> preferred growth orientation exhibiting a luminescence band in the visible range corresponding to the CdSe gap.

Synthesis, Characterizations and Applications of Cadmium Chalcogenide Nanowires: A Review

“…For example, CdS nanowires have been fabricated by hexagonal liquid crystal templates [41] , micelle-template [42] , and polymer ion track template [43,44] . CdSe nanowires have been synthesized by using DNA [45] and polycarbonate membranes [46] . And CdTe nanowires have been obtained by electrodepositing in polycarbonate membranes [47] .…”

Nucleation and Growth of Extremely Thin CdSe Films Electrodeposited from Near-Neutral Electrolytes

“…Most CdSe thin films have been electrodeposited from acidic aqueous baths with pH < 3. [11][12][13][14] However, these thin films are often contaminated by codeposition of elemental selenium arising from the reaction of selenous acid with hydrogen or CdSe. 15,16 Acidic solutions are also undesirable because they etch materials commonly used in conjunction with CdSe.…”