Wang Ning, Cao Xia, Guo Lin, Yang Shihe, Wu Ziyu
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 100083, China.
ACS Nano. 2008 Feb;2(2):184-90. doi: 10.1021/nn7000855.
Highly regular patterns with amazingly well-defined uniform truncated octahedrons of PbS nanocrystals as building blocks were prepared via a simple one-pot solution method. Each truncated octahedron has a composition of six {100} squares and eight {111} hexagons, and the overall structure shares 24 identical edges in a mecon way. Hexapod PbS, six-arm star-shaped dendrites, octahedron and truncated cubes were also fabricated. Structural and optical properties as well as morphological evolutions were studied by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and a confocal Raman spectroscopy. A mechanism for the formation of the PbS nanocrystals as well as their inner structure was tentatively proposed based on the characterization results.
通过一种简单的一锅溶液法制备了高度规则的图案，这些图案以硫化铅（PbS）纳米晶体的定义明确的均匀截角八面体作为构建块。每个截角八面体由六个{100}正方形和八个{111}六边形组成，并且整体结构以一种独特的方式共享24条相同的边。还制备了六足状PbS、六臂星形树枝状晶体、八面体和截角立方体。通过透射电子显微镜、扫描电子显微镜、X射线衍射和共焦拉曼光谱研究了结构和光学性质以及形态演变。基于表征结果初步提出了PbS纳米晶体形成及其内部结构的机制。
