State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China.
Small. 2010 Nov 22;6(22):2558-65. doi: 10.1002/smll.201001218.
A two-phase method is exploited to prepare many kinds of nearly monodisperse, highly crystalline, size- and shape-controlled, surface-property-tunable inorganic nanocrystals, such as metal, semiconducting, magnetic, dielectric, and rare earth nanocrystals. The reaction of the two-phase system happens at the interface between the oil (nonpolar) and water (polar) phases and the interface is an exclusive site for both nucleation and growth. Interestingly, many solvent pairs with a clear interface can be applied to synthesize inorganic nanocrystals successfully. Generally, as-prepared nanocrystals with organic ligands are soluble in nonpolar solvents. Furthermore, exchange of ligands can also be realized readily and the final nanocrystals can be soluble in polar solvents. This two-phase method is a simple, reproducible, and general route and is becoming as powerful an approach as other solution-based synthetic approaches to high-quality inorganic nanocrystals.
采用两相法可制备多种近单分散、高结晶度、尺寸和形状可控、表面性质可调的无机纳米晶体，如金属、半导体、磁性、介电和稀土纳米晶体。两相体系的反应发生在油（非极性）和水（极性）相之间的界面处，界面是成核和生长的唯一场所。有趣的是，许多具有明显界面的溶剂对都可成功地应用于合成无机纳米晶体。一般来说，用有机配体制备的纳米晶体在非极性溶剂中是可溶的。此外，配体的交换也可以很容易地实现，最终的纳米晶体可以溶解在极性溶剂中。这种两相法是一种简单、可重复、通用的方法，正在成为与其他基于溶液的合成方法一样强大的制备高质量无机纳米晶体的方法。
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