Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 4, Pages 1562-1569Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm14382d
Keywords
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Funding
- Science Foundation Ireland (SFI) [06/IN.1/I85]
- Solar Energy Conversion Strategic Research Cluster [07/SRC/B1160]
- Irish Government
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Spontaneous supercrystal organisation of semiconductor nanorods (CdS and CdSe) of different aspect ratios into ordered superstructures was obtained by controlled evaporation of a nanorod solution. The rods either align into two dimensional close packed perpendicular arrays or into one dimensional rail tracks depending on the total interaction energy between the rods in solution. A detailed study has identified critical factors that affect this interaction energy such as nanorod concentration, surface charge, dipole moment and solvent nature (polarity and volatility), thereby allowing a general approach to control the nature of nanorod assembly (1D or 2D). Molecular dynamics (MD) of small charged nanorods showed that opposite dipolar alignment (antiferromagnetic) was the preferred rod orientation during self-assembly.
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