带相反电荷的纳米颗粒结晶过程中的尺寸选择

Size selection during crystallization of oppositely charged nanoparticles.

作者信息

Kowalczyk Bartlomiej, Kalsin Alexander M, Orlik Rafal, Bishop Kyle J M, Patashinskii Alexander Z, Mitus Antoni, Grzybowski Bartosz A

机构信息

Department of Chemical Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.

出版信息

Chemistry. 2009;15(9):2032-5. doi: 10.1002/chem.200802334.

DOI:10.1002/chem.200802334

PMID:19142930

Abstract

Opposites attract (selectively): Oppositely charged nanoparticles characterized by different size distributions form 3D supracrystals (see figure) only if the distributions overlap. Crystal quality decreases rapidly with decreasing degree of overlap, and, irrespective of the ratio of particle diameters/charges, no crystals are observed for non-overlapping distributions.

摘要

异性相吸（具有选择性）：只有当具有不同尺寸分布的带相反电荷的纳米颗粒的分布重叠时，它们才能形成三维超晶体（见图）。随着重叠程度的降低，晶体质量迅速下降，并且，不管粒径/电荷的比例如何，对于不重叠的分布都观察不到晶体。