Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 81, Issue 5, Pages 915-922Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-005-3280-7
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Contact-free handling, trapping and precise transfer of small polarizable neutral objects in solution based on dielectrophoresis is demonstrated. Laser-direct-write-created concentric aluminum ring electrode microcages are generated coaxially on top of a glass capillary that enables the direct, fast and precise transfer of specimens to and from the cage's trapping region. In this way, aggregates of pre-selected and desired size can be formed as demonstrated for pairs, triples and also larger clusters. Using a combination of two traps, which can freely be positioned with respect to each other, pairs of objects can be separated, keeping one of the constituents trapped.
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