Hierarchical Assembly of Ultranarrow Alkylamine-Coated ZnS Nanorods: A Synchrotron Surface X-Ray Diffraction Study
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- 作者：Nataly Belman ; Somobrata Acharya ; Oleg Konovalov ; Alexei Vorobiev ; Jacob Israelachvili ; Shlomo Efrima ; Yuval Golan
- 刊名：Nano Letters
- 出版年：2008
- 出版时间：November 12, 2008
- 年：2008
- 卷：8
- 期：11
- 页码：3858-3864
- 全文大小：316K
- 年卷期：v.8,no.11(November 12, 2008)
- ISSN：1530-6992
文摘
The packing of anisotropic ultranarrow nanoparticles (r ≤ 0.5 nm) in Langmuir films was investigated for two types of nanoparticles: short ZnS wires coated with tetradecylamine and ZnS rods coated with octadecylamine. In situ grazing incidence small-angle X-ray scattering (GISAXS) revealed the formation, even under zero pressure, of ordered superstructures on the water surface consisting of alternating nanoparticles. A hierarchical “packing model” is proposed, based on GISAXS, transmission electron microscopy, thermogravimetric analysis, and grazing incidence X-ray diffraction of pure surfactant Langmuir films.