%0 Electronic Article %A Leoni, Stefano and Ramlau, Reiner and Meier, Katrin and Schmidt, Marcus and Schwarz, Ulrich %I National Academy of Sciences %D 2008 %D 2008 %G English %@ 0027-8424 %~ Staatliche Kunstsammlungen Dresden, Kunstbibliothek %T Nanodomain Fragmentation and Local Rearrangements in CdSe under Pressure %V 105 %J Proceedings of the National Academy of Sciences of the United States of America %V 105 %N 50 %P 19612-19616 %U https://www.jstor.org/stable/25465696 %X

Structural transformations in extended solids result from local atomic rearrangements and phase growth mechanisms. A broad class of technologically relevant properties critically depends on local structural issues connected with domain sizes, domain boundary geometries, and defects. However, a precise understanding of structural transformation mechanisms and domain formation is still an open question. Here, we demonstrate the feasibility of very detailed mechanistic investigations in real materials as a prerequisite for intelligent property control. We address the problem of domain fragmentation in bulk CdSe under pressure, jointly by molecular dynamics simulations, high-pressure experiments, and HR-TEM imaging. We show that domain fragmentation is taking place in the high-pressure regime, where nucleation events generate both zinc blende (B3) and wurtzite (B4) structural motifs and, in turn, cause the final lamellar appearance observable by high-resolution TEM. A changed nucleation pattern and a modified B3/B4 ratio represents the system's response to modified external stress conditions.

%Z https://katalog.skd.museum/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8yNTQ2NTY5Ng %U https://katalog.skd.museum/Record/ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8yNTQ2NTY5Ng