期刊
NANO LETTERS
卷 14, 期 6, 页码 3412-3418出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl500934v
关键词
Inverse patchy colloids; heterogeneously charged particles; self-assembly; charged substrates; quasi two-dimensional confinement
类别
资金
- Austrian Science Foundation (FWF) [M1170-N16, V249-N27, P23910-N16, F41 (SFB ViCoM)]
- Austrian Science Fund (FWF) [V 249, P 23910] Funding Source: researchfish
- Austrian Science Fund (FWF) [V249, P23910] Funding Source: Austrian Science Fund (FWF)
The self-assembly of colloidal particles is a route to designed materials production that combines high flexibility, cost effectiveness, and the opportunity to create ordered structures at length scales ranging from nano- to micrometers. For many practical applications in electronics, photovoltaics, and biomimetic material synthesis, ordered mono- and bilayers are often needed. Here we present a novel and simple way to tune via external parameters the ordering of heterogeneously charged colloids into quasi two-dimensional structures. Depending on the charges of the underlying substrate and of the particles, a rich and versatile assembly scenario takes place, resulting from the complex interplay between directional attractive and repulsive particle-particle and particle-substrate interactions. Upon subtle variations of the relative charge of the system components, emerging via pH modification, reversible changes either from extended aggregates to a monomeric phase or from triangular to square domains are observed.
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