Magnetic Quantum Dots:  Synthesis, Spectroscopy, and Magnetism of Co2+- and Ni2+-Doped ZnO Nanocrystals

• Published in: Journal of the American Chemical Society Vol. 125; no. 43; pp. 13205 - 13218
• Main Authors: Schwartz, Dana A, Norberg, Nick S, Nguyen, Quyen P, Parker, Jason M, Gamelin, Daniel R
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 29.10.2003
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Physics; Cobalt ions; Doped materials; Transition elements Compounds; Magnetic hysteresis; Electronegativity; Experimental study; Magnetic transitions; Zinc oxides; Semiconductor quantum dots; Transmission electron microscopy; Remanent magnetization; Nickel ions; Magnetic circular dichroism; Magnetic materials; Charge transfer; Transition elements Ions; Magnetic properties

We report a method for the preparation of colloidal ZnO-diluted magnetic semiconductor quantum dots (DMS-QDs) by alkaline-activated hydrolysis and condensation of zinc acetate solutions in dimethyl sulfoxide (DMSO). Mechanistic studies reveal that Co2+ and Ni2+ dopants inhibit nucleation and growth...