Formation of Thick, Large-Area Nanoparticle Superlattices in Lithographically Defined Geometries

Superlattices of colloidal nanocrystals hold the promise of new nanomaterials with tunable properties. The positioning and size of these structures are often poorly controlled after self-assembly from the solution phase, making studies of their properties difficult. We report the fabrication of ∼100...

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Bibliographic Details
Published in:Nano letters 2010-04, Vol.10 (4), p.1517-1521
Main Authors: Akey, Austin, Lu, Chenguang, Yang, Lin, Herman, Irving P
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of nanofabrication
Nanocrystalline materials
Nanoparticles - chemistry
Nanoscale materials and structures: fabrication and characterization
Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Nanoscale pattern formation
Nanotechnology - instrumentation
Particle Size
Physics
Self-assembly
Structure of solids and liquids
crystallography
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Summary:Superlattices of colloidal nanocrystals hold the promise of new nanomaterials with tunable properties. The positioning and size of these structures are often poorly controlled after self-assembly from the solution phase, making studies of their properties difficult. We report the fabrication of ∼100 layer thick, three-dimensional superlattices on a substrate with controlled lateral placement. This novel fabrication technique generates long-range order over the micrometer scale and controlled placement by employing lithographic patterning and microfluidic flow.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl100129t