The surfactant templated gold-silver nanowire growth process in a thin solution film was probed by cryo-transmission electron microscopy (cryo-TEM). The increasing surfactant concentration upon film drying appears to induce phase transformations in the film and form a liquid crystalline template for the nanowires growth. High-resolution transmission electron microscopy (HRTEM) and electron holography revealed that the nanowires were polycrystalline with some preferred crystallite orientations and had a roughly cylindrical cross-section. Further improvement of the technique may lead to highly ordered metal nanowire arrays within the surfactant matrix similar to the closely related mesoporous materials.
Bibliographical noteFunding Information:
The authors gratefully acknowledge fruitful discussions with Prof. Oren Regev. The Electron Holography study in this work is supported by a Marie Curie project of the European Community.
- Gold nanorods
- Liquid crystal phases
- Mesoporous materials
- Surfactant mesophases