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High frequency asynchronous magnetic bead rotation for improved biosensors.


ABSTRACT: Biosensors with increasingly high sensitivity are crucial for probing small scale properties. The asynchronous magnetic bead rotation (AMBR) sensor is an emerging sensor platform, based on magnetically actuated rotation. Here the frequency dependence of the AMBR sensor's sensitivity is investigated. An asynchronous rotation frequency of 145 Hz is achieved. This increased frequency will allow for a calculated detection limit of as little as a 59 nm change in bead diameter, which is a dramatic improvement over previous AMBR sensors and further enables physical and biomedical applications.

SUBMITTER: Kinnunen P 

PROVIDER: S-EPMC3009753 | biostudies-other | 2010 Nov

REPOSITORIES: biostudies-other

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