Entropic Ligands for Nanocrystals: From Unexpected Solution Properties to Outstanding Processability

详细信息    查看全文

• 作者：Yu Yang ; Haiyan Qin ; Maowei Jiang ; Long Lin ; Tao Fu ; Xingliang Dai ; Zhenxing Zhang ; Yuan Niu ; Hujia Cao ; Yizheng Jin ; Fei Zhao ; Xiaogang Peng
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：April 13, 2016
• 年：2016
• 卷：16
• 期：4
• 页码：2133-2138
• 全文大小：385K
• 年卷期：0
• ISSN：1530-6992

文摘

Solution processability of nanocrystals coated with a stable monolayer of organic ligands (nanocrystal–ligands complexes) is the starting point for their applications, which is commonly measured by their solubility in media. A model described in the other report (10.1021/acs.nanolett.6b00737) reveals that instead of offering steric barrier between inorganic cores, it is the rotation/bending entropy of the C–C σ bonds within typical organic ligands that exponentially enhances solubility of the complexes in solution. Dramatic ligand chain-length effects on the solubility of CdSe-n-alkanoates complexes shall further reveal the power of the model. Subsequently, “entropic ligands” are introduced to maximize the intramolecular entropic effects, which increases solubility of various nanocrystals by 10²–10⁶. Entropic ligands can further offer means to greatly improve performance of nanocrystals-based electronic and optoelectronic devices.