From Gold Nanoseeds to Nanorods: The Microscopic Origin of the Anisotropic Growth
| العنوان: | From Gold Nanoseeds to Nanorods: The Microscopic Origin of the Anisotropic Growth |
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| المؤلفون: | Marialore Sulpizi, Santosh Kumar Meena |
| المصدر: | Angewandte Chemie International Edition. 55:11960-11964 |
| بيانات النشر: | Wiley, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Materials science, Passivation, Nanoparticle, Nanotechnology, Crystal growth, General Medicine, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Asymmetric growth, 01 natural sciences, Catalysis, 0104 chemical sciences, Molecular dynamics, Pulmonary surfactant, Chemical engineering, Nanorod, 0210 nano-technology, Layer (electronics) |
| الوصف: | Directly manipulating and controlling the size and shape of metal nanoparticles is a key step for their tailored applications. In this work, molecular dynamics simulations were applied to understand the microscopic origin of the asymmetric growth mechanism in gold nanorods. Different factors influencing the growth were selectively included in the models to unravel the role of the surfactants and ions. In the early stage of the growth, when the seed is only a few nanometers large, a dramatic symmetry breaking occurs as the surfactant layer preferentially covers the (100) and (110) facets, leaving the (111) facets unprotected. This anisotropic surfactant layer in turn promotes anisotropic growth with the less protected tips growing faster. When silver salt is added to the growth solution, the asymmetry of the facets is preserved, but the Br(-) concentration at the interface increases, resulting in increased surface passivation. |
| تدمد: | 1521-3773 1433-7851 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::053b98ef9d160665220e4b11beb20571Test https://doi.org/10.1002/anie.201604594Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....053b98ef9d160665220e4b11beb20571 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213773 14337851 |
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