10.1021/acs.chemmater.7b00459.s001
Whitney Bryks
Whitney
Bryks
Stephanie C. Smith
Stephanie C.
Smith
Andrea R. Tao
Andrea R.
Tao
Metallomesogen Templates for Shape Control of Metal
Selenide Nanocrystals
American Chemical Society
2017
Metal Selenide Nanocrystals Metal alkanethiolates
morphology-directing capability
Ag 2 Se nanorods
Such metallomesogen precursors
AgCuSe nanospheres
organometallic single-source precursors
AgSeC 12 H 25 mesophases
AgSeC 12 H 25
Shape Control
decomposition reactions
Metallomesogen Templates
mesogenic behavior
ultrathin Cu 2 Se nanoribbons
novel metallomesogen compounds
NC precursors
metal sulfide nanocrystals
lamellar bilayer structures
mesogenic regime
CuSeC 12 H 25
NC morphologies
metal selenide NCs
Cu alkanethiolates
anisotropic morphologies
novel class
mesogenic transitions
lamellar bilayer nanostructures
anisotropic NC morphologies
compounds exhibit
2017-03-31 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Metallomesogen_Templates_for_Shape_Control_of_Metal_Selenide_Nanocrystals/4869350
Metal
alkanethiolates are organometallic single-source precursors
that have been used to synthesize metal sulfide nanocrystals (NCs)
from thermal decomposition reactions. Ag and Cu alkanethiolates are
remarkable because they adopt lamellar bilayer nanostructures that
give rise to mesogenic behavior akin to that of thermotropic liquid
crystals. Such metallomesogen precursors have been demonstrated to
template the nucleation and growth of highly anisotropic NC morphologies.
In this work, we synthesize novel metallomesogen compounds, namely,
CuSeC<sub>12</sub>H<sub>25</sub> and AgSeC<sub>12</sub>H<sub>25</sub>, to target shaped metal selenide NCs. We show that these compounds
adopt lamellar bilayer structures and undergo mesogenic transitions
at elevated temperatures. We find that structural disparities between
the CuSeC<sub>12</sub>H<sub>25</sub> and AgSeC<sub>12</sub>H<sub>25</sub> mesophases lead to the formation of distinct two- and one-dimensional
NC morphologies, respectively. Moreover, both compounds exhibit an
isotropic phase that produces either nanospheres or irregularly shaped
particles. By exploiting the morphology-directing capability of the
mesogenic regime, we detail the synthesis of ultrathin Cu<sub>2</sub>Se nanoribbons, Ag<sub>2</sub>Se nanorods, and AgCuSe nanospheres.
This work demonstrates that metallomesogens can serve as a novel class
of NC precursors with the ability to access highly anisotropic morphologies
and tailored compositions.