title: Digenite Nanosheets Synthesized by Thermolysis of Layered Copper-Alkanethiolate Frameworks.
abstract: Copper sulfide nanocrystals support localized surface plasmon resonances in the near-infrared wavelengths and have significant potential as active plasmonic nanomaterials due to the tunability of this optical response. While numerous strategies exist for synthesizing copper sulfide nanocrystals, few methods result in nanocrystals with both controlled morphological shapes and crystallinity. Here, we synthesize and characterize ultrathin (<5 nm) Cu9S5nanosheets that are formed by solventless thermolysis, utilizing Cu alkanethiolates as single-source precursors. Layered Cu alkanethiolate precursors adopt a highly ordered structure which can be further stabilized in the presence of Cl-and also serve to template the formation of nanosheets. We show that, in the absence of Cl-, only isotropic and disk-like Cu2-xS nanocrystals form. These findings offer further insight into the use of layered metal-organic single-source precursors as templates for anisotropic nanocrystal growth.
authors.affiliation: Department of NanoEngineering, University of California, San Diego , 9500 Gilman Drive MC 0448, La Jolla, California 92039-0448, United States.
authors.forename: Whitney
authors.initials: W
authors.lastname: Bryks
authors.affiliation: Department of NanoEngineering, University of California, San Diego , 9500 Gilman Drive MC 0448, La Jolla, California 92039-0448, United States.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Lupi
authors.affiliation: Department of NanoEngineering, University of California, San Diego , 9500 Gilman Drive MC 0448, La Jolla, California 92039-0448, United States.
authors.forename: Charles
authors.initials: C
authors.lastname: Ngo
authors.affiliation: Department of NanoEngineering, University of California, San Diego , 9500 Gilman Drive MC 0448, La Jolla, California 92039-0448, United States.
authors.forename: Andrea R
authors.initials: AR
authors.lastname: Tao