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dc.contributor.advisorScott R. Manalis.en_US
dc.contributor.authorRusso, Peter R. (Peter Raphael), 1980-en_US
dc.contributor.otherMassachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.en_US
dc.date.accessioned2005-06-02T19:29:04Z
dc.date.available2005-06-02T19:29:04Z
dc.date.copyright2004en_US
dc.date.issued2004en_US
dc.identifier.urihttp://hdl.handle.net/1721.1/17977
dc.descriptionThesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.en_US
dc.descriptionIncludes bibliographical references (p. 52-53).en_US
dc.description.abstractMicrofabricated silicon field-effect sensors with integrated poly(dimethylsiloxane) microfluidic channels have been demonstrated. These devices are designed for the label-free detection and recognition of specific biomolecules such as DNA. Label-free methods eliminate the time-consuming and costly step of tagging molecules with radioactive or fluorescent markers prior to detection. The devices presented here are sensitive to the intrinsic charge of the target molecules, which modulates the width of the carrier-depleted region of a lightly-doped silicon sensor. The variable depletion capacitance is precisely measured, indicating changes in sensor surface potential of less than 30[micro]V. The integrated microfluidic channels enable the delivery of small (nanoliter-scale) amounts of fluid directly to the sensors. Capacitance-voltage curves were recorded using phosphate buffered saline (PBS) as the test electrolyte; a maximum slope of 44pF/V was measured in depletion. pH sensitivity was also demonstrated using modified PBS solutions. A device with dual 80x80Om sensors yielded a response of 40mV/decade, referenced to the fluid electrode. A device with dual 50x50[micro]m sensors yielded a response of 12mV/decade, referenced to the sensors.en_US
dc.description.statementofresponsibilityby Peter R. Russo.en_US
dc.format.extent62 p.en_US
dc.format.extent3015154 bytes
dc.format.extent3021077 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.publisherMassachusetts Institute of Technologyen_US
dc.rightsM.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.en_US
dc.rights.urihttp://dspace.mit.edu/handle/1721.1/7582
dc.subjectElectrical Engineering and Computer Science.en_US
dc.titleIntegrated silicon field-effect sensors and microfluidics for biomolecular detectionen_US
dc.typeThesisen_US
dc.description.degreeM.Eng.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
dc.identifier.oclc57175863en_US


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