Journal
NANO
Volume 4, Issue 1, Pages 1-5Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793292009001447
Keywords
Self-assembly; photolithography; colloid templating; nanoporous; cell encapsulation
Funding
- National Institutes of Health [1R21EB007487-01A1]
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We describe a strategy to construct three-dimensional (3D) containers with nanoporous walls by the self-assembly of lithographically patterned two-dimensional cruciforms with solder hinges. The first step involves fabricating two-dimensional (2D) cruciforms composed of six unlinked patterns: each pattern has an open window. The second step entails photolithographic patterning of solder hinges that connect the cruciform. The third step involves the deposition of polystyrene particles within the windows and the subsequent electrodeposition of metal in the voids between the polystyrene particles. Following the dissolution of the particles, the cruciforms are released from the substrate and heated above the melting point of the solder causing the cruciforms to spontaneously fold up into 3D cubic containers with nanoporous walls. We believe these 3D containers with nanoporous side walls are promising for molecular separations and cell-based therapies.
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