A High-Yield Synthesis of Chalcopyrite CuIn S 2 Nanoparticles with Exceptional Size Control

• Published in: Journal of nanomaterials 2009, Vol.2009, p.1-7
• Main Authors: Sun, Chivin, Gardner, Joseph S., Shurdha, Endrit, Margulieux, Kelsey R., Westover, Richard D., Lau, Lisa, Long, Gary, Bajracharya, Cyril, Wang, Chongmin, Thurber, Aaron, Punnoose, Alex, Rodriguez, Rene G., Pak, Joshua J.
• Format: Article
• Language: English
• ISSN: 1687-4110; 1687-4129
• DOI: 10.1155/2009/748567

We report high-yield and efficient size-controlled syntheses of Chalcopyrite CuIn S 2 nanoparticles by decomposing molecular single source precursors (SSPs) via microwave irradiation in the presence of 1,2-ethanedithiol at reaction temperatures as low as 100 ° C and times as short as 30 minutes. The nanoparticles sizes were 1.8 nm to 10.8 nm as reaction temperatures were varied from 100 ° C to 200 ° C with the bandgaps from 2.71 eV to 1.28 eV with good size control and high yields (64%–95%). The resulting nanoparticles were analyzed by XRD, UV-Vis, ICP-OES, XPS, SEM, EDS, and HRTEM. Titration studies by 1 H NMR using SSP 1 with 1,2-ethanedithiol and benzyl mercaptan were conducted to elucidate the formation of Chalcopyrite CuIn S 2 nanoparticles.