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Controlled semiconductor nanorod assembly from solution: influence of concentration, charge and solvent nature
Date
2012
Abstract
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 10 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.
Supervisor
Description
peer-reviewed
Publisher
Royal Society of Chemistry
Citation
Journal of Materials Chemistry;22, pp. 1562-1569
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Ryan_2012_controlled.pdf
Adobe PDF, 1.05 MB
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Funding Information
Science Foundation Ireland (SFI), Irish Government’s Programme for Research in Third Level Institutions, Cycle 4