From single to multiple atomic layers: A unique approach to the systematic tuning of structures and properties of inorganic-organic hybrid nanostructured semiconductors
From single to multiple atomic layers: A unique approach to the systematic tuning of structures and properties of inorganic-organic hybrid nanostructured semiconductors
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DOI：
10.1021/ja065799e
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发表时间：
2007-03-21
影响因子：
15
通讯作者：
Li, Jing
中科院分区：
文献类型：
--
作者：
Huang, Xiaoying;Li, Jing
为了系统地定制基于II-VI族半导体的无机-有机杂化纳米结构材料的独特家族的结构和性质，我们设计并工程化了一组新的二维晶体[（M（2）Q（2））（L）]纳米结构（其中M = Zn，Cd; Q = S，Se;并且L =乙胺，正丙胺，正丁胺，正戊胺，正己胺）。这些化合物由M（2）Q（2）的双原子层组成，中间被有机单胺隔开。通过X射线粉末衍射（PXRD）分析表征了2D-[（M（2）Q（2））（L）]的晶体结构。这些化合物的晶体结构类似于我们之前报道的2D-[（MQ）（L）]系列，因为它们也包含被有机单胺夹在中间的II-VI层。主要区别在于II-VI层厚，其中它们在2D-[（MQ）（L）]中为单层（n = 1），但在2D-[（M（2）Q（2））（L）]中为双层（n = 2）。光学吸收实验表明，由于量子限制效应（QCE），所有的双层化合物的吸收边（0.6-1.2 eV）的蓝移。然而，这种蓝移的程度明显小于单层2D-[（MQ）（L）]系统的蓝移程度（1.0-2.0 eV），这是由于它们的层厚度不同。热重（TG）分析表明，纳米级II-VI（MQ）颗粒作为后TG产品的所有双层杂交。
In order to systematically tailor the structures and properties of a unique family of inorganic-organic hybrid nanostructured materials based on II-VI semiconductors, we have designed and engineered a new group of two-dimensional crystalline [(M(2)Q(2))(L)] nanostreuctures (where M = Zn, Cd; Q = S, Se; and L = ethylamine, n-propylamine, n-butylamine, n-amylamine, n-hexylamine). These compounds are composed of double atomic layers of M(2)Q(2) separated by organic monoamines. The crystal structures of 2D-[(M(2)Q(2))(L)] are characterized by powder X-ray diffraction (PXRD) analysis. The crystal structures of these compounds are similar to the 2D-[(MQ)(L)] series that we reported earlier, in that they also contain II-VI slabs sandwiched by organic monoamines. The main difference is in the thickness of the II-VI slabs, where they are single-layer (n = 1) in 2D-[(MQ)(L)] but double-layer (n = 2) in 2D-[(M(2)Q(2))(L)](.) Optical absorption experiments show that all double-layer compounds exhibit a blue shift in their absorption edge (0.6-1.2 eV), due to the quantum confinement effect (QCE). However, the extent of such a blue shift is significantly less than that of the single-layer 2D-[(MQ)(L)] systems (1.0-2.0 eV) as a result of the difference in their layer thickness. Thermogravimetric (TG) analysis has revealed nanosized II-VI (MQ) particles as the post-TG product of all double-layer hybrids.