Talapin Dmitri V
Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, USA.
ACS Nano. 2008 Jun;2(6):1097-100. doi: 10.1021/nn8003179.
Two papers in this issue report important developments in the field of inorganic nanomaterials. Chen and O'Brien discuss self-assembly of semiconductor nanocrystals into binary nanoparticle superlattices (BNSLs). They show that simple geometrical principles based on maximizing the packing density can determine BNSL symmetry in the absence of cohesive electrostatic interactions. This finding highlights the role of entropy as the driving force for ordering nanoparticles. The other paper, by Weller and co-workers, addresses an important problem related to device integration of nanoparticle assemblies. They employ the Langmuir-Blodgett technique to prepare long-range ordered monolayers of close-packed nanocrystals and transfer them to different substrates.
本期的两篇论文报道了无机纳米材料领域的重要进展。陈和奥布赖恩讨论了半导体纳米晶体自组装成二元纳米粒子超晶格（BNSLs）的情况。他们表明，在没有内聚静电相互作用的情况下，基于最大化堆积密度的简单几何原理可以决定BNSL的对称性。这一发现突出了熵作为纳米粒子有序排列驱动力的作用。另一篇由韦勒及其同事撰写的论文，解决了与纳米粒子组件器件集成相关的一个重要问题。他们采用朗缪尔-布洛杰特技术制备紧密堆积纳米晶体的长程有序单层，并将其转移到不同的基底上。
