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arXiv 1712.02473cond-mat.softcond-mat.mtrl-scicond-mat.stat-mech
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填充与胶体自组装的相关性

Relevance of Packing to Colloidal Self-Assembly

Rose Cersonsky, Greg van Anders, Paul M. Dodd, Sharon C. Glotzer

摘要:

自20世纪20年代以来,填充参数已被用于合理化从原子混合物到胶体晶体的系统中的晶体结构。包装参数最近被应用于复杂的纳米颗粒结构,在那里他们经常,但并不总是,工作。我们检查时,如果有的话,包装是一个因果机制,在硬颗粒近似的胶体晶体。我们研究了三种晶体结构,包括它们的理想堆积形状。我们表明,与预期相反,订购机制不能包装,即使当的自组装结构是相同的denumbered包装。我们还表明,最好的颗粒形状的硬颗粒胶体晶体在无限的压力极限是不完美的版本的理想包装形状。

英文摘要:

Since the 1920s, packing arguments have been used to rationalize crystal structures in systems ranging from atomic mixtures to colloidal crystals. Packing arguments have recently been applied to complex nanoparticle structures, where they often, but not always, work. We examine when, if ever, packing is a causal mechanism in hard particle approximations of colloidal crystals. We investigate three crystal structures comprised of their ideal packing shapes. We show that, contrary to expectations, the ordering mechanism cannot be packing, even when the thermodynamically self-assembled structure is the same as that of the densest packing. We also show that the best particle shapes for hard particle colloidal crystals in the infinite pressure limit are imperfect versions of the ideal packing shape.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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