Ordering of Binary Polymeric Nanoparticles on Hydrophobic Surfaces Assembled from Low Volume Fraction Dispersions
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- 作者：Rupa Mukhopadhyay ; Othman Al-Hanbali ; Saju Pillai ; Anne Gry Hemmersam ; Rikke Louise Meyer ; Alan Christy Hunter ; Kenneth John Rutt ; Flemming Besenbacher ; Seyed Moein Moghimi ; Peter Kingshott
- 刊名：Journal of the American Chemical Society
- 出版年：2007
- 出版时间：November 7, 2007
- 年：2007
- 卷：129
- 期：44
- 页码：13390 - 13391
- 全文大小：192K
- 年卷期：v.129,no.44(November 7, 2007)
- ISSN：1520-5126
文摘
Well-ordered two-component nanoparticle (NP) patterns are generated on hydrophobic surfaces from mixed particle suspensions of very low volume fraction by simple drop-casting and self-assembly during solvent evaporation. A range of NP sizes (520-60 nm), volume fractions, and particle chemistries (aminated, carboxylated, sulfated) are tested, and in all cases, hexagonally packed patterns of the larger NP interdispersed with the smaller NP are obtained. The mechanism for formation appears to be entropically driven since the pattern formation occurs over a wide pH range (4-10) and is thus independent of particle surface charge. The nanopatterns show promise as model systems for studying interfacial phenomena such as protein adsorption and cell adhesion.