Abstract:
Provided are a FET-based sensor for ionic material detection, an ionic material detecting apparatus including the FET-based sensor, and a method of detecting an ionic material using the FET-based sensor. The FET-based sensor includes: a sensing chamber including a reference electrode and a plurality of sensing FETs; and a reference chamber including a reference electrode and a plurality of reference FETs. Signals from a target biomolecule can be sharply separated from noise, such as a drift signal spontaneously generated due to a reaction in the surface of the gate electrode and a signal generated due to the pressure applied when injecting a solution. The FET-based sensor has high sensitivity, and thus can be used to detect a low-concentration ionic material, even a biomolecule, such as a nucleic acid or protein, with improved robustness to noise.
Abstract:
A multi-channel fluorescence measuring optical system and a multi-channel fluorescence sample analyzer using the optical system are provided. The multi-channel fluorescence measuring optical system, which irradiates light onto a plurality of sample channels and detecting fluorescence radiated from samples (m), includes: a light source (10); an integrator (20) for giving the light irradiated from the light source a uniform intensity distribution; a sample holder (30) having a plurality of sample channels on which the samples (m) are mounted, wherein the samples (m) are exited by the light emitted from the integrator (20); a beam splitter (25) between the integrator (20) and the sample holder (30) for dividing the incident light in a predetermined ratio; and a light detecting unit (40) for detecting fluorescence from the samples (m) through the beam splitter (25). Preferably, the light intensities of fluorescence images are detected using optical fiber bundles and photodiodes, the manufacturing cost can be greatly reduced, and the optical system can be miniaturized.
Abstract:
Provided is a method of reducing the temperature difference between a pair of substrates (103, 121), which are a high-temperature substrate (103) and a low-temperature substrate (121), including a heat transfer facilitating layer (110) which has a higher thermal conductivity than air and can hold particles (150) between those substrates (103, 121), and maintaining close contacts among the high-temperature substrate (103), the heat transfer facilitating layer (110), and the low-temperature substrate (121) so that the formation of an air layer can be prevented both between the high-temperature substrate (103) and the heat transfer facilitating layer (110), and between the low-temperature substrate (121) and the heat transfer facilitating layer (110). In addition, provided is a fluid reaction device (100) comprising: a microfluidic reaction chip (120) that accommodates a fluid (F); a heater (101) that heats the microfluidic reaction chip (120); and a heat transfer facilitating layer (110) that is interposed between the microfluidic reaction chip (120) and the heater (101), has a higher thermal conductivity than air and can hold particles (150), wherein the heater (101), the heat transfer facilitating layer (110), and the microfluidic reaction chip (120) are fixed to one another so that the formation of an air layer can be prevented both between the heater (101) and the heat transfer facilitating layer (110), and between the microfluidic reaction chip (120) and the heat transfer facilitating layer (110).
Abstract:
Provided is a microfluidic device including at least one inlet (110,120), at least one outlet (300), and a microchannel connecting the inlet and the outlet. The microfluidic device includes two or more electromagnets (200) disposed on sidewalls of the microchannel and oriented in a predetermined direction with respect to the direction in which the microchannel extends.
Abstract:
An ultra small fluorescence detector capable of detecting in real time reaction undergoing in a micro chamber having a predetermined volume and disposed on a microfluid chip is provided. The fluorescence detector for detecting in real time PCR amplification undergoing in the microfluid chip having a micro chamber with a predetermined volume includes a light source generating an excitation beam, a first optical system capable of irradiating the excitation beam having a predetermined spot size to the micro chamber, a first detector, and a second optical system reflecting a fluorescent beam derived from the excitation beam having the predetermined spot size in the micro chamber to the first detector. Accordingly, the fluorescence detector is designed such that light emitted by a light source is focused between a first mirror and an objective lens. Therefore, the spot size of an excitation beam transmitted by the objective lens is largely formed so that the excitation beam can be irradiated on the whole micro chamber of the microfluid chip, thereby detecting a fluorescent beam on a broader area.
Abstract:
A multi-channel fluorescence measuring optical system and a multi-channel fluorescence sample analyzer using the optical system are provided. The multi-channel fluorescence measuring optical system, which irradiates light onto a plurality of sample channels and detecting fluorescence radiated from samples, includes: a light source (60a-d); an integrator (70) for giving the light irradiated from the light source a uniform intensity distribution; a sample holder (80) having a plurality of sample channels on which the samples (m) are mounted, wherein the samples are exited by the light emitted from the integrator; and a beam splitter (75) between the integrator and the sample holder for dividing the incident light in a predetermined ratio. Since the light intensities of fluorescence images are detected using optical fiber bundles (85a-d) and photodiodes (89a-d), the manufacturing cost can be greatly reduced, and the optical system can be miniaturized.
Abstract:
Provided are an optical system for analyzing multi-channel samples which uses a mirror rotating at high speeds and an aspherical mirror, and a multi-channel sample analyzer employing the optical system. The optical system for analyzing multi-channel samples, includes a light source unit which emits light traveling along an optical axis; a semi-spheroid aspherical mirror disposed in rotational symmetry about the optical axis; and an inclined mirror which reflects the light exiting the light source unit to the semi-spheroid aspherical mirror, while rotating about the optical axis, wherein an opening is formed in the center of the semi-spheroid aspherical mirror such that the light exiting the light source unit enters the inclined mirror through the semi-spheroid aspherical mirror.