Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00086 : Assemble Nanoparticles in Diblock Copolymer-Based Supramolecular Thin Films in Fifteen Minutes
Author:
Controlling nanoparticle assemblies in thin films enables one
to exploit their collective properties to generate functional
devices such as hybrid photovoltaic cells, capacitors and
optical waveguides. This requires precise control over
nanoparticle assemblies over multiple length scales with a
single particle precision. Moreover, to be compatible with
large-scale processing, there is a need to reduce the
processing time down to minutes. Here we present a simple yet
robust approach where hierarchical assemblies of nanoparticles
in thin films can be achieved in 15 minutes with control over
the macroscopic alignment of nanoparticle assemblies as well as
the inter-particle ordering. We use diblock copolymer-based
supramolecules, in which the small molecules are attached to
the polymer side chains non-covalently, to direct the
assemblies of nanoparticles in thin films. Furthermore,
vertical alignment of nanoparticle assemblies can be readily
obtained in the films with thicknesses from 50 to 300 nm
without balancing the interfacial interactions. The simplicity,
robustness and the rate of nanoparticles assemblies in thin
films makes it possible to apply this approach to the
fabrications of nanoparticle-based nanodevices over macroscopic
distances.
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