Functionalized nanostructures with liquid-like behavior: Expanding the gallery of available nanostructures
Functionalized nanostructures with liquid-like behavior: Expanding the gallery of available nanostructures
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DOI：
10.1002/adfm.200500076
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发表时间：
2005-08-01
影响因子：
19
通讯作者：
Giannelis, EP
中科院分区：
文献类型：
--
作者：
Bourlinos, AB;Chowdhury, SR;Giannelis, EP
最近，我们开发了一种新型的功能化纳米结构，在没有溶剂的情况下表现出液体样的行为，并保持其纳米结构在液体状态。迄今为止开发的纳米结构包括功能化的二氧化硅和磁性氧化铁纳米颗粒，层状有机硅酸盐纳米颗粒，聚氧乙烯簇和有机-无机混合网络。为了证明这一概念的更广泛的适用性，并提供对这类材料的更深入的了解，本工作引用了具有与上述类似行为的功能化纳米结构的其他范例。在一种情况下，用季铵有机硅烷对纳米粒子（TiO 2，无机纳米结构）进行表面官能化导致离子改性的纳米粒子，当其与聚（乙二醇）（PEG）尾磺酸根阴离子静电结合时，在不存在溶剂的情况下表现出液体状行为。在生物纳米结构的不同但相当有趣的情况下，用PEG尾季铵阳离子对DNA寡核苷酸进行离子交换官能化导致具有吸引力特征的容易分离的液体衍生物。这些实施例显示了该概念在一系列纳米结构上的通用性。
Recently, we have developed a novel family of functionalized nanostructures that exhibit liquid-like behavior in the absence of solvents and preserve their nanostructure in the liquid state. The gallery of nanostructures developed so far includes functionalized silica and magnetic iron oxide nanoparticles, layer-like organosilicate nanoparticles, polyoxometalate clusters, and organic-inorganic hybrid networks. In an effort to demonstrate the wider applicability of this concept and to provide a deeper insight into this class of materials, the present work cites additional paradigms of functionalized nanostructures with similar behavior as above. In one case, surface functionalization of anatase nanoparticles (TiO2, an inorganic nanostructure) with a quaternary ammonium organosilane leads to ionically modified nanoparticles that, when electrostatically combined with a poly(ethylene glycol) (PEG)-tailed sulfonate anion, exhibit liquid-like behavior in the absence of solvents. In a different but quite interesting case of a bionanostructure, ion-exchange functionalization of a DNA oligonucleotide with a PEG-tailed quaternary ammonium cation leads to an easily separable liquid derivative with attractive features. These examples show the versatility of this concept over a range of nanostructures.