Controlled synthesis of new compounds using modulated elemental reactants

Current Opinion in Solid State and Materials Science

Volumn 3, Issue 2, 1998, Pages 159-167

  Johnson, David C ^a  

^a UNIVERSITY OF OREGON   (United States)

Author keywords

DSC differential scanning calorimetry

Indexed keywords

EID: 0000283318     PISSN: 13590286     EISSN: None     Source Type: Journal    
DOI: 10.1016/S1359-0286(98)80082-X     Document Type: Article

References (33)

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23. Oyelaran O, Novet T, Johnson CD, Johnson DC. Controlling solid state reaction pathways: composition dependence in the nucleation energy of InSe. J Am Chem Soc. 118:1996;2422-2426 This paper reports the measurements of the nucleation energy as a function of the composition of the amorphous intermediate. The striking composition dependence of nucleation observed in this system suggests the possible use of diffusionally constrained amorphous intermediates as synthetic intermediates in the synthesis of new compounds which may be thermodynamically unstable with respect to disproportionation to a mixture of known compounds.
24. Fukuto M, Anderson J, Hornbostel MC, Johnson DC, Huang H, Kevan SD. The effect of layer thickness and composition of the kinetics of solid state reactions in the niobium-selenium system studied using superlattice reactants. J Alloys Compounds. 248:1997;59-65 The data contained in this paper illustrate how the critical bilayer thickness is a function of the relative composition of the initial multilayer. The composition of the amorphous intermediate is used to control the identity of nucleating compounds.
25. Novet T, Johnson DC. New synthetic approach to extended solids: selective synthesis of iron silicides via the amorphous state. J Am Chem Soc. 113:1991;3398-3403.
26. 2, demonstrates the advantages of using the diffusionally constrained amorphous state as a synthetic intermediate.
27. Hornbostel MD, Hyer EJ, Edvalson JH, Johnson DC. Systematic study of rare earth iron antimony filled skutterudites synthesized using multilayer precursors. Inorg Chem. 36:1997;4270-4274 This paper demonstrates the ability to rapidly explore a series of ternary systems, using the amorphous state to access isostructural new compounds which are thermodynamically unstable with respect to disproportionation into known binary compounds. The ability to control reaction intermediates, avoiding the stable binary compounds, is key to the synthesis of the title compounds.
28. Noh M, Johnson DC. Designed synthesis of solid state structural isomers from modulated reactants. J Am Chem Soc. 118:1996;9117-9122 This paper describes a new synthesis approach for the preparation of crystalline superlattices containing interwoven layers of known compounds. The ability to follow the course of the interdiffusion reaction using low angle diffraction permits the suggestion of a reaction mechanism describing the evolution of the multilayered reactant to the crystalline superlattice. This information is used to optimise the annealing conditions and prepare a series of crystalline superlattices with designed superstructure.
29. m superlattices. J Appl Phys. 81:1997;7787-7792.
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32. 2 heterostructures from superlattice reactants. Chem Mater. 8:1996;1853-1857 This paper demonstrates that the reaction mechanism proposed in [28**] can be used to prepare superlattices containing components which are not lattice matched. This is possible because the proposed reaction route does not involve epitaxy as a key step.
33. 2C superlattices via ultra-thin modulated reactants. Mater Res Soc Symp Proc. 434:1996;75-80.