3D assembly and actuation of nanopatterned membranes using nanomagnets

A new method for aligning and actuating membranes for 3D nano-assembly based on the interactions of nanomagnets has been developed. Arrays of nanopatterned magnetic material are integrated onto thin-film membranes. It is shown theoretically and experimentally that separate arrays of nanomagnets attract and self-align when brought into close proximity. This provides a useful mechanism for 3D nanofabrication because it allows higher positional tolerances as the nanomagnets provide the fine alignment. The features on the membrane can first be patterned using traditional wafer and thin-film processes with features such as nanophotonics as well as the nanomagnets. The membranes are then folded or stacked bringing the magnets into coarse alignment. The magnets pull-in, align and bond the membrane segments to create a highly aligned structure in 3D space. A theoretical framework was developed for the magnetic and mechanical design elements of the system. A set of experiments based on folding the membrane to bring the arrays into coarse alignment was designed requiring new mechanical hinge elements at the micro-scale. Nanomagnets were shown to provide the folding actuation, as well as alignment. It was shown that the nanomagnet arrays can provide better than 30nm self-alignment over a 100 micron membrane segment. It was also shown that the nanomagnets can provide reconfigurability, in that the systems can controllably be shifted between more than one alignment position. Further steps were taken to improve the alignment, increase the membrane size, integrate other nanofeatures and improve the membrane processing.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Mechanical Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2011

Author dc:creator

• Nichol, Anthony John

Advisor dc:contributor.advisor

• George Barbastathis.

• Mechanical Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/67591

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/67591