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Exposure of high index facets in KDP crystals
Author(s) -
Ding Jianxu,
Wang Shenglai,
Xu Xinguang,
Gu Qingtian,
Cheng Xiufeng,
Liu Guangxia,
Liu Wenjie,
Sun Yun
Publication year - 2011
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100099
Subject(s) - tapering , crystal (programming language) , materials science , twist , chemistry , kinetics , face (sociological concept) , nanotechnology , crystallography , geometry , physics , mathematics , computer science , social science , computer graphics (images) , quantum mechanics , sociology , programming language
A series of KDP crystals doped with WO 4 2‐ additive was grown by using rapid growth method. WO 4 2‐ additive inhibited the growth of (100) faces and made (100) faces tapering. With high additive concentration, two adjacent (100) faces twisted towards their intersecting crystal edge and (100) faces became twisting. Moreover, high index facets of (512) were exposed when the additive concentration was 500 ppm. The element analysis suggested that WO 4 2‐ was prone to being incorporated with (100) face. The growth kinetics of (100) face testified that WO 4 2‐ played an inhibited role. The AFM investigation on (100) face indicated WO 4 2‐ could impede step bunching. High concentration of WO 4 2‐ could kink the terrace of the macro‐steps and create another series of macro‐steps. The motion direction of the new creative steps was vertical to that of the original steps. When the motions of the vertical steps were both inhibited by WO 4 2‐ , the steps would become tapering and (100) face would twist, which ultimately led to the exposure of (512) facets. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)