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Steps in Solution Growth: Revised Gibbs-Thomson Law, Turbulence and Morphological StabilityTwo groups of new phenomena revealed by AFM and high resolution optical interferometry on crystal faces growing from solutions will be discussed. 1. Spacing between strongly polygonized spiral steps with low less than 10(exp -2) kink density on lysozyme and K- biphtalate do not follow the Burton-cabrera-Frank theory. The critical length of the yet immobile first Short step segment adjacent to a pinning defect (dislocation, stacking fault) is many times longer than that following from the step free energy. The low-kink density steps are typical of many growth conditions and materials, including low temperature gas phase epitaxy and MBE. 2. The step bunching pattern on the approx. 1 cm long { 110) KDP face growing from the turbulent solution flow (Re (triple bonds) 10(exp 4), solution flow rate approx. 1 m/s) suggests that the step bunch height does not increase infinitely as the bunch path on the crystal face rises, as is usually observed on large KDP crystals. The mechanism controlling the maximal bunch width and height is based on the drag of the solution depleted by the step bunch down thc solution stream. It includes splitting, coagulation and interlacing of bunches
Document ID
20040111986
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Chernov, A. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Rashkovich, L. N.
(Moscow State Univ. Russia)
Vekilov, P. G.
(Houston Univ. TX, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Solid-State Physics
Meeting Information
Meeting: ICCG-14
Location: Grenoble
Country: France
Start Date: August 9, 2004
End Date: August 14, 2004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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