摘要:
A semiconductor probe with a high-resolution tip and a method of fabricating the same are provided. The semiconductor probe includes: a cantilever doped with a first impurity; a resistive convex portion projecting from an end portion of the cantilever and lightly doped with a second impurity opposite in polarity to the first impurity; and first and second electrode regions formed on either side of the resistive convex portion and heavily doped with the second impurity.
摘要:
A mercury selective fluorescent chemosensor for detecting mercury ions (Hg2+) by a compound represented by formula 1 is provided. A novel fluorescent sensitive compound prepared by introducing two aminopyrene functions as a fluorescent sensitive moiety into a binding site of the compound represented by the formula 1, is used for selectively detecting mercury ions (Hg2+) is also provided. The mercury selective fluorescent sensitive chemosensor is a switch type chemosensor having ON-OFF-type Hg2+-selective fluorescence quenching behavior and is not affected by other coexistent metal ions. The changes in fluorescence of the compounds represented by formula 1 were analyzed by ratiometric approach using monomer and excimer emissions of the pyrene fluorophore to selectively signal the concentration of mercury ions (Hg2+). The chemosensor can detect mercury ions in a micromolar unit even in a solution including an excess of water. Accordingly, the mercury selective fluorescent chemosensor for detecting mercury ions (Hg2+) can be used effectively in environmental and medical applications.
摘要:
A microwave oven includes a main body, a door opening and closing the main body, and a control panel placed in one side of the main body and provided with a plurality of function operators. A guide line is provided on the control panel and lights up to guide manipulation order of the function operator.
摘要:
A bipolar junction transistor includes a semiconductor substrate having a surface, a base region of first conductivity type in the substrate, and an emitter region of second conductivity type extending from the surface into the base region to form a generally concave semiconductor junction having an apex oriented towards the surface. The emitter region preferably includes a plurality of contiguous emitter subregions extending from the surface into the base region in an arcuate manner and merging to form the generally concave semiconductor junction. The transistor preferably includes an emitter terminal electrically contacting the emitter region at an emitter contact area on the surface, the emitter contact area having a central portion substantially centered with respect to the apex of the semiconductor junction. To produce the bipolar junction transistor, a base layer of first conductivity type is provided in a semiconductor substrate, ions of second conductivity type implanted through the base layer surface in portions of the base layer surface increasing in area from a central portion of the base layer surface laterally towards outer portions of the base layer surface, and the implanted ions diffused into the base layer to thereby create the emitter region and the concave semiconductor junction. Preferably, the ions are implanted by depositing an oxide or other masking layer on the base layer, selectively etching the masking layer to expose the plurality of surface portions, and then implanting the ions into the exposed surface portions.
摘要:
Disclosed are a novel 8-hydroxyquinoline acetamide compound, an 8-hydroxyquinoline thioamide and use thereof. More specifically, disclosed are a novel 8-hydroxyquinoline thioamide compound suitable for use as a selective chemodosimeter that shows considerably high detection sensitivity to mercury ions, an 8-hydroxyquinoline acetamide compound as an intermediate thereof, preparation thereof, and a chemodosimeter for mercury ion-selective detection, the chemodosimeter comprising the 8-hydroxyquinoline thioamide compound. The compounds as disclosed herein exhibit considerably effective fluorescence specificity of an off-on type, detect a micromole of mercury ions from chemical and biological aqueous systems, and allow 100% desulfurization within 5 minutes, thus being considerably useful in the chemical industry.
摘要:
A semiconductor probe and a method of fabricating the same are provided. The semiconductor probe includes a cantilever doped with first impurities, a resistive tip which protrudes from an end of the cantilever and doped lightly with second impurities, doping control layers formed on both sides of a protruding portion of the resistive tip, and first and second electrode regions formed under the doping control layers and doped heavily with the second impurities.
摘要:
A microwave oven includes a main body, a door opening and closing the main body, and a control panel placed in one side of the main body and provided with a plurality of function operators. A guide line is provided on the control panel and lights up to guide manipulation order of the function operator.
摘要:
A semiconductor probe and a method of fabricating the same are provided. The semiconductor probe includes a cantilever doped with first impurities, a resistive tip which protrudes from an end of the cantilever and doped lightly with second impurities, doping control layers formed on both sides of a protruding portion of the resistive tip, and first and second electrode regions formed under the doping control layers and doped heavily with the second impurities.
摘要:
Disclosed are a novel 8-hydroxyquinoline acetamide compound, an 8-hydroxyquinoline thioamide and use thereof. More specifically, disclosed are a novel 8-hydroxyquinoline thioamide compound suitable for use as a selective chemodosimeter that shows considerably high detection sensitivity to mercury ions, an 8-hydroxyquinoline acetamide compound as an intermediate thereof, preparation thereof, and a chemodosimeter for mercury ion-selective detection, the chemodosimeter comprising the 8-hydroxyquinoline thioamide compound. The compounds as disclosed herein exhibit considerably effective fluorescence specificity of an off-on type, detect a micromole of mercury ions from chemical and biological aqueous systems, and allow 100% desulfurization within 5 minutes, thus being considerably useful in the chemical industry.
摘要:
A semiconductor probe having an embossed resistive tip and a method of fabricating the semiconductor probe are provided. The semiconductor probe includes a protrusion portion protruded to a predetermined height on a cantilever in a first direction crossing a length direction of the cantilever, an embossed resistive tip formed on the protrusion portion, and first and second semiconductor electrode regions formed at opposite sides of the embossed resistive tip at the protrusion portion, wherein the cantilever is doped with a first dopant, the first and second semiconductor electrode regions and the embossed resistive tip are doped with a second dopant having a different polarity from the first dopant, and the embossed resistive tip is doped with a concentration lower than the first and second semiconductor electrode regions