TY - JOUR
T1 - Mono- and Multilayer Silicene-Type Honeycomb Lattices by Oriented Attachment of PbSe Nanocrystals
T2 - Synthesis, Structural Characterization, and Analysis of the Disorder
AU - Peters, Joep L.
AU - Altantzis, Thomas
AU - Lobato, Ivan
AU - Jazi, Maryam Alimoradi
AU - Van Overbeek, Carlo
AU - Bals, Sara
AU - Vanmaekelbergh, Daniel
AU - Sinai, Sophia Buhbut
PY - 2018/7/24
Y1 - 2018/7/24
N2 - Nanocrystal (NC) solids are commonly prepared from nonpolar organic NC suspensions. In many cases, the capping on the NC surface is preserved and forms a barrier between the NCs. More recently, superstructures with crystalline connections between the NCs, implying the removal of the capping, have been reported, too. Here, we present large-scale uniform superstructures of attached PbSe NCs with a silicene-type honeycomb geometry, resulting from solvent evaporation under nearly reversible conditions. We also prepared multilayered silicene honeycomb structures by using larger amounts of PbSe NCs. We show that the two-dimensional silicene superstructures can be seen as a crystallographic slice from a 3-D simple cubic structure. We describe the disorder in the silicene lattices in terms of the nanocrystals position and their atomic alignment. The silicene honeycomb sheets are large enough to be used in transistors and optoelectronic devices.
AB - Nanocrystal (NC) solids are commonly prepared from nonpolar organic NC suspensions. In many cases, the capping on the NC surface is preserved and forms a barrier between the NCs. More recently, superstructures with crystalline connections between the NCs, implying the removal of the capping, have been reported, too. Here, we present large-scale uniform superstructures of attached PbSe NCs with a silicene-type honeycomb geometry, resulting from solvent evaporation under nearly reversible conditions. We also prepared multilayered silicene honeycomb structures by using larger amounts of PbSe NCs. We show that the two-dimensional silicene superstructures can be seen as a crystallographic slice from a 3-D simple cubic structure. We describe the disorder in the silicene lattices in terms of the nanocrystals position and their atomic alignment. The silicene honeycomb sheets are large enough to be used in transistors and optoelectronic devices.
U2 - 10.1021/acs.chemmater.8b02178
DO - 10.1021/acs.chemmater.8b02178
M3 - Article
SN - 0897-4756
VL - 30
SP - 4831
EP - 4837
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 14
ER -