High-Speed, High-Resolution Impedance Sensor
The UC impedance probe: has unparalleled temporal and spatial resolution; is compatible with a wide variety of samples, including dynamic biological systems; and can be used in conjunction with other sensor technologies, such as the topography sensing of SPM.
The UC probe could be used to make quantitative measurements and images of the electrical impedances of samples of metals, semiconductors, insulators, electrolytic fluids over a wide range of frequencies (100 to 109 Hz) when in close proximity to them. The UC probe will likely be used in both fixed and scanning-type applications either as a standalone device, or as a part of a surface-probe microscope (SPM) tip as in atomic force microscopy (allowing simultaneous measurement of local electrical impedance and surface topology) or as an element within an array of probes that cover a wide variety of electrical and chemical conditions. The high speed and resolution of the UC probe will make it the preferred impedance sensor in many applications.
A University of California researcher has invented a radio-frequency probe that is suitable for use with electrolytic and biological samples, providing a time resolution on the order of 10-9 seconds and a spatial resolution in the range of 10 nm to 1 mm.
Patent Number: US7451646B2
Application Number: US2006460965A
Inventor: Cleland, Andrew N. | Soh, Hyongsok T.
Priority Date: 28 Jul 2005
Priority Number: US7451646B2
Application Date: 28 Jul 2006
Publication Date: 18 Nov 2008
IPC Current: G01N001900 | A61B000505 | G01F002326
US Class: 07333504 | 073304C | 324658 | 324686 | 340620 | 600407
Assignee Applicant: The Regents of the University of California
Title: Device and method for resonant high-speed microscopic impedance probe
Usefulness: Device and method for resonant high-speed microscopic impedance probe
Summary: For measuring impedance variations to sense materials or objects attached to the particles, for measuring flow rates; measuring concentrations of particles; distinguishing particles in a mixed fluid stream; and measuring diffusion rates of particles (claimed); for performing various biological or chemical assays or monitoring.
Novelty: Device capable of measuring impedance variances in a small region comprises probe electrode separated by non-conducting regions from shield electrodes; detecting end; inductor; signal generator; and impedance measurement electronics
Measurement/Testing
Measurement Tool
7451646
Additional Technologies by these Inventors Tech ID/UC Case 10272/2003-344-0 Related Cases 2003-344-0
USA
