摘要:
There is provided a microelectronic sensor device (100) for the detection of target components (10) near a binding surface (12), comprising a source (21) for emitting a beam (101) of radiation having a wavelength incident at the binding surface (12); an optical structure (11) near the binding surface (12), for providing evanescent radiation, in response to the radiation incident at the binding surface (12), in a detection volume (4) bound by the binding surface (12) and extending over a decaylength away from the binding surface (12) into a sample chamber (2); and a detector (31) for detecting radiation (102) from the target component (10)1 present in the detection volume (4), in response to the emitted incident radiation (101) from the source (21) wherein the binding surface (12) is provided with upstanding walls of a dielectric material (3), for providing one or more detection volumes (4) bound to a maximum in plane detection volume dimension (W1) smaller than a diffraction limit, the diffraction limit defined by the radiation wavelength and the medium (2) for containing the target components (10).
摘要:
The invention relates to detection the presence of a target molecule in a sample, wherein the sample is contacted with a substrate, the substrate subsequently being washed in a wash step. In particular, the invention relates to a method of detecting the presence of a target molecule in a sample, the method comprising: (a) contacting the sample (37) with a substrate having immobilized thereon probe molecules that specifically binds to the target molecule; (b) washing the substrate (38) in a wash step by a wash fluid in order to remove or dilute unbound target molecules; (c) detect the presence of resultant binding complexes (39) on the substrate to determine whether the target molecule is present in the sample. The wash fluid being substantially refractive index matched to the substrate.
摘要:
A biosensor device (10) for detecting molecules (16) in an analyte (14) comprises a binding element (12) which can be brought into contact with the analyte (14) for binding the molecules (16) thereto. The binding element (12) is an optical waveguide (34) comprising a strip (36) on a first layer (38). Light (17) can be applied to the strip (36). The biosensor device (10) further comprises an optical detection system (22) for detecting luminescent light (20) emitted by the excited molecules (16).
摘要:
The present invention proposes a sub-wavelength luminescence sensor, such as e.g. a luminescence biosensor or a luminescence chemical sensor, comprising at least two wire grids (1, 2) positioned perpendicular with respect to each other. The luminescence sensor, in which the excitation radiation is efficiently used and the luminescence radiation is efficiently detected, has an improved signal-to-noise ratio and a separated excitation and luminescence radiation.
摘要:
During an assay, optical measurements are made at a sensing surface (112), and at least one “homogeneity-image” of the sensing surface (112) is generated. From this image, an “homogeneity-indicator” is determined for at least one region of interest, and the optical measurements are then evaluated in dependence on said indicator. The homogeneity-indicator may for example be a binary value which indicates if an inhomogeneity was detected or not. If an inhomogeneity was detected, all optical measurements may be rejected, only measurements for the involved region of interest may be rejected, or measurements for a selected sub-area of the involved region of interest (ROI) may be rejected.
摘要:
A substance determining apparatus determines a substance within a fluid where particles, which have attached the substance, are bound to a binding surface. A sensing unit is configured to generate a sensing signal being indicative of at least one of i) a distance between the particles bound on the binding surface and the binding surface, and ii) an in-plane position of the particles bound on the binding surface. A binding discrimination unit is configured to discriminate between different kinds of binding of the particles bound on the binding surface depending on the generated sensing signal. The binding discrimination unit may be a unit for determining the part of the sensing signal being caused by specifically bound particles and for determining the substance based on this determined part of the sensing signal.
摘要:
The invention relates to a substance determining apparatus for determining a substance within a fluid. Particles attach the substance and bind to a binding surface (30), wherein a sensing signal is generated depending on the bound particles. Binding events indicating a binding of a particle on the binding surface (30) are determined from the generated sensing signal, and the substance within the fluid is determined based on the determined binding events. During a procedure of determining a substance within a fluid, particles may bind to the binding surface and may leave the binding surface. Therefore, during this procedure a number of binding events can be determined being much larger than the number of bound particles. The determination of the substance within the fluid can therefore be based on a very large amount of data, thereby increasing the accuracy of determining the substance within the fluid.
摘要:
The invention relates to a substance determining apparatus for determining a substance within a fluid. Particles attach the substance and bind to a binding surface (30), wherein a sensing signal is generated depending on the bound particles. Binding events indicating a binding of a particle on the binding surface (30) are determined from the generated sensing signal, and the substance within the fluid is determined based on the determined binding events. During a procedure of determining a substance within a fluid, particles may bind to the binding surface and may leave the binding surface. Therefore, during this procedure a number of binding events can be determined being much larger than the number of bound particles. The determination of the substance within the fluid can therefore be based on a very large amount of data, thereby increasing the accuracy of determining the substance within the fluid.
摘要:
The invention relates to a substance determining apparatus for determining a substance within a fluid. Particles, which have attached the substance, are bound to a binding surface (30). A sensing unit (33) is adapted to generate a sensing signal being indicative of at least one of i) a distance between the particles bound on the binding surface (30) and the binding surface (30) and ii) an in-plane position of the particles bound on the binding surface. A binding discrimination unit (34) is adapted to discriminate between different kinds of binding of the particles bound on the binding surface (30) depending on the generated sensing signal. The binding discrimination unit (34) is preferentially a unit for determining the part of the sensing signal being caused by specifically bound particles and to determine the substance based on this determined part of the sensing signal.
摘要:
The present invention provides method allowing for real time detection of a multitude of target nucleic acids of interest in one reaction (multiplexing) using dyes that are specific for double stranded nucleic acids.