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Design, Fabrication and Testing of Functional Single Pores for Bio-Detection Applications
Stockholm University, Faculty of Science, Department of Physics.
2006 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

Chemically functionalized and size-tunable apertures constitute a platform of choice for bio-organism sensing. Apertures were fabricated on pre-patterned silicon platforms using focused ion beam (FIB) drilling, followed by local oxide (TEOS) deposition.

Functionalization of the nanopore surfaces was then achieved by self-assembled monolayer chemistry. Ionic flow measurements recorded through single nanopores at each stage of the device preparation allowed to demonstrate the open nature of the channels and to follow the aperture functionalization process step by step. The chemical selectivity of the DNA-functionalized devices was investigated by measuring the duration and amplitude of the ion current blockade events generated by single DNA-functionalized beads electrophoretically driven through the apertures. Future applications include the selective detection of bacteria and viruses.

Place, publisher, year, edition, pages
Stockholm: Fysikum , 2006. , 71 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-952ISBN: 91-7155-230-8 (print)OAI: oai:DiVA.org:su-952DiVA: diva2:200714
Public defence
2006-05-02, sal FB42, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 14:15
Opponent
Supervisors
Available from: 2006-04-11 Created: 2006-04-11Bibliographically approved

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