Templated self-assembly in three dimensions using magnetic levitation
- 12 August 2011
- journal article
- Published by Royal Society of Chemistry (RSC) in Soft Matter
- Vol. 7 (19), 9113-9118
- https://doi.org/10.1039/c1sm05962a
Abstract
Although self-assembly (SA) in two dimensions (2D) is highly developed (especially using surfaces as a templates), SA in three dimensions (3D) has been more difficult. This paper describes a strategy for SA in 3D of diamagnetic plastic objects (mm- to cm-sized in this work, but in principle in sizes from ∼10 μm to m) supported in a paramagnetic fluid by a non-uniform magnetic field. The magnetic field and its gradient levitate the objects, template their self-assembly, and influence the shape of the assembled cluster. The structure of the 3D assembling objects can be further directed using hard mechanical templates—either the walls of the container or co-levitating components—which coincide spatially with the soft template of the magnetic field gradient. Mechanical agitation anneals the levitating clusters; the addition of photocurable adhesive, followed by UV illumination, can permanently fuse components together.This publication has 28 references indexed in Scilit:
- Measuring Densities of Solids and Liquids Using Magnetic Levitation: FundamentalsJournal of the American Chemical Society, 2009
- Nanostructure fabrication using block copolymersNanotechnology, 2003
- Cooperative 2-DOF robots for precision assemblyPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Self-Assembly at All ScalesScience, 2002
- On-chip natural assembly of silicon photonic bandgap crystalsNature, 2001
- Electrophoretic Deposition To Control Artificial Opal GrowthLangmuir, 1999
- Photonic crystals: putting a new twist on lightNature, 1997
- Block Copolymer Thermodynamics: Theory and ExperimentAnnual Review of Physical Chemistry, 1990
- Molecular-Level Control over Surface Order in Self-Assembled Monolayer Films of Thiols on GoldScience, 1988
- Bubble Raft Model for an Amorphous AlloyNature, 1972