摘要:
A device is disclosed for filtering a particle to be detected from a fluid. In at least one embodiment, the device includes a substrate and, applied above it, a protective layer, a channel being disposed between them for the purpose of receiving a fluid containing different particles. In at least one embodiment, the channel extends at least partially in a spiral shape between its inlet and outlet and on its internal wall contains a coating for attracting a particle type to be filtered, which coating is applied at least on the radially outside subsection of the internal wall of the channel. Owing to the laminar longitudinal movement of the fluid inside the channel a radially outward directed centrifugal force acts on the particles, with the result that per time unit more particles come into contact with the radially outside subsection of the internal wall of the channel than the radially inside subsection of the internal wall of the channel. The filter effect is reinforced as a result.
摘要:
An arrangement and a method measures cell vitalities with a sensor array. The sensor array is formed on a surface of a semiconductor chip. The semiconductor chip has integrated circuits and an integrated circuit is associated with each sensor of the sensor array, for processing the measurement signals of the respective sensor. The integrated circuits are formed in the semiconductor chip spatially in each case below the associated sensor and neighboring sensors of the sensor array have a center-to-center in the range of micrometers. The pH and/or pO2 can be measured in the environment of a living cell.
摘要:
An arrangement and a method measures cell vitalities with a sensor array. The sensor array is formed on a surface of a semiconductor chip. The semiconductor chip has integrated circuits and an integrated circuit is associated with each sensor of the sensor array, for processing the measurement signals of the respective sensor. The integrated circuits are formed in the semiconductor chip spatially in each case below the associated sensor and neighboring sensors of the sensor array have a centre-to-centre in the range of micrometers. The pH and/or pO2 can be measured in the environment of a living cell.
摘要:
A connection device for random connection of a first member of first transmission/reception units with a second number of second transmission/reception units has a switching matrix that includes a third number of controllable micromechanical switching elements that are respectively activatable to establish a connection between one of the first transmission/reception units and one of the second transmission/reception units. A control circuit selectively activates the respective micromechanical switching elements to selectively establish respective connections between the first number of first transmission/reception units and the second number of transmission/reception units.
摘要:
A met4hod is disclosed for functionalizing biosensors. The biosensors are based on semiconductor chips mounted on a finished processed wafer. They are provided with sensor fields placed thereupon, which are arranged in any array, and, to be precise, for carrying out a functionalization, for example, with organic molecules such as nucleic acids like DNA, RNA and PNA or with their derivatives, proteins, sugar molecules, or antibodies.
摘要:
A switching circuit arrangement is disclosed. The arrangement includes a substrate, a plurality of functional units arranged on the substrate, a plurality of selection line groups including selection lines, a plurality of signal line groups including signal lines, a buffer unit for each signal line group, a selection unit which is coupled to the selection line groups, and a signal unit which is coupled to the signal lines.
摘要:
Circuit arrangement having a sensor electrode, a first circuit unit, which is electrically coupled to the sensor electrode, and a second circuit unit, which has a first capacitor. The first circuit unit holds an electrical potential of the sensor electrode in a predetermined first reference range around a predetermined electrical desired potential by coupling the first capacitor and the sensor electrode such that there is a matching of their electrical potentials. If the second circuit unit detects the electrical potential of the first capacitor being outside a second reference range, the second circuit unit brings the first capacitor to a first electrical reference potential.
摘要:
A biosensor array having a substrate, a plurality of biosensor zones arranged on the substrate, each of which has a first terminal and a second terminal, at least one drive line and at least one detection line, the at least one drive line being electrically insulated from the at least one detection line. In each case the first terminal of each biosensor zone is coupled to precisely one of the at least one drive line and the second terminal of each biosensor zone is coupled to precisely one of the at least one detection line, and at least one of the at least one drive line and at least one of the at least one detection line is coupled to at least two of the biosensor zones. The biosensor array also has a drive unit for providing an electrical drive signal, a detection unit for detecting an electrical detection signal resulting from the electrical drive signal, and a selection unit that couples the drive unit to the drive line of a biosensor zone to be selected and the detection unit to the detection line of the biosensor zone to be selected, whereby the biosensor zone is selected.
摘要:
Sensor arrangement, set up as an integrated circuit, having a substrate, at least three sensor electrodes arranged on the substrate such that, in an operating state in which an electrically conductive substance is introduced into the sensor arrangement, the sensor electrodes are coupled to one another by means of the electrically conductive substance, capture molecules immobilized on at least a portion of the sensor electrodes, wherein molecules to be detected can hybridize with the capture molecules, a control circuit for applying a first electrical signal to a selected sensor electrode and simultaneously applying a second electrical signal to at least two of the other sensor electrodes, the first electrical signal being a first temporally variable electrical signal and/or the second electrical signal being a second temporally variable electrical signal, a detection device, which is set up such that, in a first operating state, in which a reference liquid is introduced into the sensor arrangement, a reference value of a third temporally variable electrical signal resulting from the first temporally variable electrical signal and/or from the second temporally variable electrical signal is detected at the selected sensor electrode, and in a second operating state, in which an analyte possibly having molecules to be detected is introduced into the sensor arrangement, a sensor value of the third temporally variable electrical signal resulting from the first temporally variable electrical signal and/or from the second temporally variable electrical signal is detected at the selected sensor electrode, and an evaluation circuit, which, on the basis of the reference value and the sensor value, determines whether a hybridization event has taken place at the selected sensor electrode.
摘要:
A device for detecting chemical or biochemical substances in fluids for use in an electrochemical camera. The device includes a first carrier having a sensor array with a plurality of electrochemical sensors. A second carrier includes a porous layer having at least one functional region, in which specifically binding capturing molecules are immobilized. The at least one functional region is arranged directly adjacent to at least one non-functionalized region. Assigned to the at least one functional region and the at least one non-functionalized region are several sensors of the sensor array, for use as the electrochemical camera.