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Issue 4, 2012
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Controlled semiconductor nanorod assembly from solution: influence of concentration, charge and solvent nature

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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 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.

Graphical abstract: Controlled semiconductor nanorod assembly from solution: influence of concentration, charge and solvent nature

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Publication details

The article was received on 05 Sep 2011, accepted on 18 Nov 2011 and first published on 29 Nov 2011


Article type: Paper
DOI: 10.1039/C1JM14382D
Citation: J. Mater. Chem., 2012,22, 1562-1569
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    Controlled semiconductor nanorod assembly from solution: influence of concentration, charge and solvent nature

    A. Singh, R. D. Gunning, S. Ahmed, C. A. Barrett, N. J. English, J. Garate and K. M. Ryan, J. Mater. Chem., 2012, 22, 1562
    DOI: 10.1039/C1JM14382D

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