Methods and apparatus for detecting, quantifying, enriching, and/or separating bacterial species in fluid sample are provided. The fluid sample is provided as input to a microfluidic passage of a microfluidic device, wherein the microfluidic device comprises at least one electrode disposed adjacent to the microfluidic passage. The at least one electrode is activated to capture bacteria in the sample using dielectrophoresis, wherein the capture efficiency of bacteria is at least 99%.

The present technology relates to improved device and methods of use of insulator-based dielectrophoresis. This device provides a multi-length scale element that provides enhanced resolution and separation. The device provides improved particle streamlines, trapping efficiency, and induces laterally similar environments. Also provided are methods of using the device.

Described herein are aspects of a microfluidic separation and assay system that can include a microfluidic contactless dielectrophoretic (cDEP) device, a microfluidic concentrator, and a microfluidic assay chamber. In some aspects, microfluidic separation and assay system can be included on a single microfluidic chip. Also described herein are methods of using the microfluidic separation and assay system described herein.

The present disclosure provides devices, systems, and methods related to protein bioelectronics. In particular, the present disclosure provides devices, systems, and methods for manipulating a protein-of-interest into a target position within two electrodes in order to generate a functional bioelectronic circuit. The present disclosure also provides devices, systems, and methods for selectively attracting and concentrating one or more target analytes to the protein-of-interest, which can be used to develop analytical platforms to detect and measure various characteristics of protein function.

A microfluidic device may, in an example, include at least one microfluidic channel, a dielectrophoresis separator to separate a plurality of cells passing within the at least one microfluidic channel, and a thermal resistor to eject at least one cell from the microfluidic device. A cassette may, in an example, include a die coupled to a substrate of the cassette, the die including at least one microfluidic channel, a dielectrophoresis separator along the microfluidic channel to separate a plurality of cells passing within the microfluidic channel, and an ejection device to eject at least one of the plurality of cells into an assay well.

A microparticle trapping device includes: a fluid channel configured to be injected with a fluid including a microparticle; first and second electrodes configured to generate an electric field in the fluid channel; and an electrical insulator formed with at least one opening between the first and second electrodes in the fluid channel. The electrical insulator is disposed between the first and second electrodes so that an inhomogeneous electric field is made through the at least one opening between the first and second electrodes in the fluid channel, and the still other aspect is configured to trap the microparticle through dielectrophoresis.

The present invention provides a new method for accurately identifying DEP cross-over frequencies of one or more particles in a sample, and quickly and efficiently conveying that information to assist in the separation, e.g., DEP separation, or analysis of the one of more particles under examination or investigation. The present invention also provides an apparatus and method for monitoring the dielectrophoretic response of one or more particles and determining the DEP cross-over frequency of particles of interest.

The present invention provides novel microfluidic substrates and methods that are useful for performing biological, chemical and diagnostic assays. The substrates can include a plurality of electrically addressable, channel bearing fluidic modules integrally arranged such that a continuous channel is provided for flow of immiscible fluids.

The present invention relates to a multi-microorganism detection system, and more particularly, to a multi-microorganism detection system using a dielectrophoresis force. Provided is a rapid and accurate multi-microorganism detection system. Microorganisms are concentrated at a high throughput using DEP after synthesizing the microorganisms and fluorescent magnetic particles, and when a complex in which the fluorescent magnetic particles are bound to the microorganisms passes through a detection unit by moving only the microorganisms to the detection unit after separating the magnetic particles from the complex (i.e., the microorganisms to which the magnetic particles are bound) using a DEP force, a fluorescence signal of a specific wavelength band is generated according to the type of the fluorescent magnetic particle and the concentration of the microorganisms according to the type of microorganism is measured by measuring and analyzing the fluorescence signal.

A method of electroporation of a biological object, comprises: introducing a carrier particle into a medium containing the biological object; applying a first electric field to the medium to induce trapping of the biological object by the carrier particle; and varying at least one parameter of the first electric field so as to induce electroporation of the biological object.