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Title: Self-assembly of designed precursors: A route to crystallographically aligned new materials with controlled nanoarchitecture

Abstract

Modulated elemental reactants is a method by which new and complex intergrowth compounds can be synthesized by the self-assembly of designed precursors prepared by physical vapor deposition. Careful calibration of the composition and thickness of the precursors ensures the formation of the desired product by precise control of local composition and diffusion lengths. Superstructures of increasing complexity can be realized using binary and ternary systems as starting points. The synthesis of systems based on three different binary compounds, either alloyed together or separated into distinct layers, expands the number of possible superstructures that can be formed using this technique, but provides analytical challenges. The synthesis of [(SnSe){sub 1.15}]{sub 1}([Ta{sub x}V{sub 1−x}]Se{sub 2}){sub 1}[(SnSe){sub 1.15}]{sub 1}([V{sub y}Ta{sub 1−y}]Se{sub 2}){sub 1} compound is used to illustrate the preparation of precursors and the challenges in both measuring and limiting the interdiffusion of layers during self-assembly. Systematic changes in the electrical properties of (SnSe){sub 1+δ}(Ta{sub x}V{sub 1−x})Se{sub 2} alloys are observed as x is varied. The electrical resistivity of [(SnSe){sub 1.15}]{sub 1}([Ta{sub x}V{sub 1−x}]Se{sub 2}){sub 1}[(SnSe){sub 1.15}]{sub 1}([V{sub y}Ta{sub 1−y}]Se{sub 2}){sub 1} can be modeled as the two constituent layers in parallel.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22584039
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 236; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ALLOYS; CONTROL; DESIGN; DIFFUSION; DIFFUSION LENGTH; ELECTRIC CONDUCTIVITY; LAYERS; NANOSTRUCTURES; PHYSICAL VAPOR DEPOSITION; PRECURSOR; SYNTHESIS; THICKNESS; THIN FILMS; TIN SELENIDES

Citation Formats

Westover, Richard, Atkins, Ryan A., Falmbigl, Matthias, Ditto, Jeffrey J., and Johnson, David C. Self-assembly of designed precursors: A route to crystallographically aligned new materials with controlled nanoarchitecture. United States: N. p., 2016. Web. doi:10.1016/J.JSSC.2015.08.018.
Westover, Richard, Atkins, Ryan A., Falmbigl, Matthias, Ditto, Jeffrey J., & Johnson, David C. Self-assembly of designed precursors: A route to crystallographically aligned new materials with controlled nanoarchitecture. United States. doi:10.1016/J.JSSC.2015.08.018.
Westover, Richard, Atkins, Ryan A., Falmbigl, Matthias, Ditto, Jeffrey J., and Johnson, David C. Fri . "Self-assembly of designed precursors: A route to crystallographically aligned new materials with controlled nanoarchitecture". United States. doi:10.1016/J.JSSC.2015.08.018.
@article{osti_22584039,
title = {Self-assembly of designed precursors: A route to crystallographically aligned new materials with controlled nanoarchitecture},
author = {Westover, Richard and Atkins, Ryan A. and Falmbigl, Matthias and Ditto, Jeffrey J. and Johnson, David C.},
abstractNote = {Modulated elemental reactants is a method by which new and complex intergrowth compounds can be synthesized by the self-assembly of designed precursors prepared by physical vapor deposition. Careful calibration of the composition and thickness of the precursors ensures the formation of the desired product by precise control of local composition and diffusion lengths. Superstructures of increasing complexity can be realized using binary and ternary systems as starting points. The synthesis of systems based on three different binary compounds, either alloyed together or separated into distinct layers, expands the number of possible superstructures that can be formed using this technique, but provides analytical challenges. The synthesis of [(SnSe){sub 1.15}]{sub 1}([Ta{sub x}V{sub 1−x}]Se{sub 2}){sub 1}[(SnSe){sub 1.15}]{sub 1}([V{sub y}Ta{sub 1−y}]Se{sub 2}){sub 1} compound is used to illustrate the preparation of precursors and the challenges in both measuring and limiting the interdiffusion of layers during self-assembly. Systematic changes in the electrical properties of (SnSe){sub 1+δ}(Ta{sub x}V{sub 1−x})Se{sub 2} alloys are observed as x is varied. The electrical resistivity of [(SnSe){sub 1.15}]{sub 1}([Ta{sub x}V{sub 1−x}]Se{sub 2}){sub 1}[(SnSe){sub 1.15}]{sub 1}([V{sub y}Ta{sub 1−y}]Se{sub 2}){sub 1} can be modeled as the two constituent layers in parallel.},
doi = {10.1016/J.JSSC.2015.08.018},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 236,
place = {United States},
year = {2016},
month = {4}
}