1
|
Nguyen J, Underwood JG, Llorente García I. Orienting lipid-coated graphitic micro-particles in solution using AC electric fields: A new theoretical dual-ellipsoid Laplace model for electro-orientation. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
2
|
Bausch CS, Heyn C, Hansen W, Wolf IMA, Diercks BP, Guse AH, Blick RH. Ultra-fast cell counters based on microtubular waveguides. Sci Rep 2017; 7:41584. [PMID: 28134293 PMCID: PMC5278506 DOI: 10.1038/srep41584] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 12/22/2016] [Indexed: 01/29/2023] Open
Abstract
We present a radio-frequency impedance-based biosensor embedded inside a semiconductor microtube for the in-flow detection of single cells. An impedance-matched tank circuit and a tight wrapping of the electrodes around the sensing region, which creates a close, leakage current-free contact between cells and electrodes, yields a high signal-to-noise ratio. We experimentally show a twofold improved sensitivity of our three-dimensional electrode structure to conventional planar electrodes and support these findings by finite element simulations. Finally, we report on the differentiation of polystyrene beads, primary mouse T lymphocytes and Jurkat T lymphocytes using our device.
Collapse
Affiliation(s)
- Cornelius S Bausch
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11c, Hamburg, Germany.,Center for Hybrid Nanostructures, University of Hamburg, Falkenried 88, Hamburg, Germany
| | - Christian Heyn
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11c, Hamburg, Germany
| | - Wolfgang Hansen
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11c, Hamburg, Germany
| | - Insa M A Wolf
- Calcium Signaling Group, Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg, Germany
| | - Björn-Philipp Diercks
- Calcium Signaling Group, Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg, Germany
| | - Andreas H Guse
- Calcium Signaling Group, Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, Hamburg, Germany
| | - Robert H Blick
- Institute of Nanostructure and Solid State Physics, University of Hamburg, Jungiusstraße 11c, Hamburg, Germany.,Center for Hybrid Nanostructures, University of Hamburg, Falkenried 88, Hamburg, Germany
| |
Collapse
|