| Autor: |
Roberts DM; Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Bardgett D; Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Gorman BP; Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401, United States.; Microelectronics Technology Department, The Aerospace Corporation, El Segundo, California 90245, United States., Perkins JD; Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Zakutayev A; Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Bauers SR; Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States. |
| Abstrakt: |
Nanoscale superlattices represent a compelling platform for designed materials as the specific identity and spatial arrangement of constituent layers can lead to tunable properties. A number of kinetically stabilized, nonepitaxial superlattices with almost limitless structural tunability have been reported in telluride and selenide chemistries but have not yet been extended to sulfides. Here, we present SnS-TaS 2 nanoscale superlattices with tunable layer architecture. Layered amorphous precursors are prepared as thin films programmed to mimic the targeted superlattice; subsequent low temperature annealing activates self-assembly into crystalline nanocomposites. We investigate structure and composition of superlattices comprised of monolayers of TaS 2 and 3-7 monolayers of SnS per repeating unit. Furthermore, a graded precursor preparation approach is introduced, allowing stabilization of superlattices with multiple stacking sequences in a single preparation. Controlled synthesis of the architecture of nanoscale superlattices is a critical path toward tuning their exotic properties and enabling integration with electronic, optical, or quantum devices. |
