Abstract: A method for preparing photoluminescent carbon nanodots includes preparing and drying a sample, ashing the sample, extracting the ashed sample with solvent, filtering the extracted sample, concentrating the filtered sample, dissolving the sample in water, and freeze-drying the dissolved sample. The sample is preferably a food waste residue or animal excrement.

Abstract: A method of preparing monoatomic layer black phosphorous by irradiating an ultrasound includes: putting black phosphorus into a solvent and irradiating the ultrasound; recovering a solution from a solution to which the ultrasound is irradiated; and collecting black phosphorus remaining after the solution has been recovered, putting the black phosphorus into a solvent, irradiating the ultrasound, and recovering a solution.

Abstract: A method of preparing monoatomic layer black phosphorous by irradiating an ultrasound includes: putting black phosphorus into a solvent and irradiating the ultrasound; recovering a solution from a solution to which the ultrasound is irradiated; and collecting black phosphorus remaining after the solution has been recovered, putting the black phosphorus into a solvent, irradiating the ultrasound, and recovering a solution.

Abstract: A method for preparing photoluminescent carbon nanodots includes preparing and drying a sample, ashing the sample, extracting the ashed sample with solvent, filtering the extracted sample, concentrating the filtered sample, dissolving the sample in water, and freeze-drying the dissolved sample. The sample is preferably a food waste residue or animal excrement.

Abstract: Disclosed is a method of preparing high crystalline nanoporous titanium dioxide, in which the high crystalline nanoporous titanium dioxide, which is harmless to the human body and self-purified through the decomposition of organic matters, is prepared in mass production at the room temperature through a simply synthesis method. The method includes the steps of (a) mixing a titanium precursor and a surfactant in a solvent and performing a sol-gel reaction at a room temperature; (b) maturing a reactant obtained through the sol-gel reaction at the room temperature; (c) filtering the matured reactant and washing the matured reactant; and (d) drying the washed reactant to obtain titanium dioxide having nanopores.

Abstract: A housing for modularizing a heat pump system of a clothes dryer and a clothes dryer having the same are disclosed. The heat pump system modularized housing of the clothes collectively modularizes a condenser, a compressor, an evaporator and an expansion valve that constitute the heat pump system of the clothes dryer. Not only does the heat pump system is stably mounted in the clothes dryer but also components of the heat pump system can be effectively protected. In addition, the fastening procedures of each component can be unified to simplify an assembling process of the clothes dryer, and thus, the productivity can be improved. Moreover, a structure of an internal flow path of the clothes dryer can be simplified to thus improve efficiency of the heat pump system.

Abstract: Disclosed is a nanoporous photocatalyst having a high specific surface area and high crystallinity and a method for preparing the same, capable of preparing nanoporous photocatalysts, which satisfy both of the high specific surface area of 350 m2/g to 650 m2/g and high crystallinity through a simple synthetic scheme, in mass production at a low price. The nanoporous catalyst having a high specific area and high crystallinity includes a plurality of nanopores having an average diameter of about 1 nm to about 3 nm. A micro-framework of the nanoporous photocatalyst has a single crystalline phase of anatase or a bicrystalline phase of anatase and brookite, and a specific surface area of the nanoporous photocatalyst is in a range of about 350 m2/g to 650 m2/g.

Abstract: A method for preparing impurity-doped titanium dioxide photocatalysts having superior photo activity at a visible light region and an ultraviolet light region in mass production. The titanium dioxide photocatalysts are prepared in mass production using low-price reusable materials at a room temperature when titanium dioxide is doped with carbon, sulfur, nitrogen, fluorine, and phosphorous.

Abstract: Disclosed is a method of preparing high crystalline nanoporous titanium dioxide photocatalyst, capable of preparing the high crystalline nanoporous titanium dioxide photocatalyst in mass production through a simply synthesis method using an ultrasonification. The method includes the steps of (a) mixing a titanium precursor and a surfactant in a first solvent and performing a sol-gel reaction; (b) maturing a reactant obtained through the sol-gel reaction for 15 hours to 25 hours; (c) filtering the matured reactant and washing the matured reactant; (d) primarily drying the washed reactant at a temperature of 20° C. to 50° C. to obtain titanium sediments; (e) mixing the titanium sediments in a second solvent and performing an ultrasonification with respect to the mixed solution for 10 minutes to 120 minutes; and (f) secondarily drying the mixed solution, which has been subject to the ultrasonification, at a temperature of 15° C. to 45° C. to obtain titanium dioxide photocatalytic particles.

Abstract: Disclosed is a method of preparing high crystalline nanoporous titanium dioxide, in which the high crystalline nanoporous titanium dioxide, which is harmless to the human body and self-purified through the decomposition of organic matters, is prepared in mass production at the room temperature through a simply synthesis method. The method includes the steps of (a) mixing a titanium precursor and a surfactant in a solvent and performing a sol-gel reaction at a room temperature; (b) maturing a reactant obtained through the sol-gel reaction at the room temperature; (c) filtering the matured reactant and washing the matured reactant; and (d) drying the washed reactant to obtain titanium dioxide having nanopores.

Abstract: A housing for modularizing a heat pump system of a clothes dryer and a clothes dryer having the same are disclosed. The heat pump system modularized housing of the clothes collectively modularizes a condenser, a compressor, an evaporator and an expansion valve that constitute the heat pump system of the clothes dryer. Not only does the heat pump system is stably mounted in the clothes dryer but also components of the heat pump system can be effectively protected. In addition, the fastening procedures of each component can be unified to simplify an assembling process of the clothes dryer, and thus, the productivity can be improved. Moreover, a structure of an internal flow path of the clothes dryer can be simplified to thus improve efficiency of the heat pump system.

Abstract: A clothes dryer includes a cabinet, a drum rotatably installed within the cabinet and a heating unit that heats the drum. Because the heating unit heats the drum itself, heat generated from the heating unit is transferred to the outer surface of the drum, passes through the interior of the drum according to thermal conduction and then heats the clothes, target items to be dried, so that temperature of the entire clothes are uniformly increased to accelerate evaporation of moisture of the target items to be dried.

Abstract: Disclosed in a control method of a clothes dryer. The drying method of a clothes dryer, includes: detecting a temperature of the air exhausted from a drum; determining a change in water content of a drying material on the basis of the detected temperature; and controlling a drying operation according to the water content change of the drying material. Accordingly, the air temperature in an exhaust port of a drum is measured, and a water content or a temperature of a drying material can be determined on the basis of data about a gradient of the temperature change.

Abstract: A heat exchanger for a dryer includes a plurality of tube units configured to conduct warm humid air and a plurality of fin units configured to conduct a flow of ambient air. The tube units and fin units are alternately stacked to form a core. The fin units includes a plurality of air channels formed by repeatedly bending a flat metal plate in a zigzag fashion and a plurality of fins formed on surfaces of the air channels. The tube units have a duct form with both ends opened. The tube units may be formed by extrusion. A plurality of channel walls can be formed inside the tube units. A plurality of grooves or fins can also be formed inside the tube units. A plurality of channel walls can also be vertically formed inside the tube units. In this case, the grooves or fins can be formed on the channel walls. The grooves or fins can also be formed in a spiral form on the inner surfaces of the tube units.

Abstract: A heat exchanger for a dryer includes a plurality of tube units in which wet air is circulated, and a plurality of fin units alternately laminated with the plurality of tube units, in which external air flows. The tube and fin units are bonded to one another at contact portions by a cladding material interposed therebetween. The cladding material is formed of a material having a melting point lower than the melting points of the tube and fin units. The cladding material can be a metallic material including aluminum or aluminum alloy. A very thin layer of cladding material helps to increase the heat transfer efficiency of the device. Likewise, using a cladding material with good thermal transfer characteristics helps to improve the heat transfer efficiency of the device. Bonding the tube units to the fin units using such a cladding material can reduce the fabrication cost and fabrication time compared to heat exchange units where the bonding is done with an epoxy.

Abstract: A heat exchanger for a dryer includes a core in which a plurality of tube units and a plurality of fin units are alternately stacked. Front and rear covers are attached at front and rear sides of the core. A front plate is positioned between the core and the front cover and a rear plate is positioned between the core and the rear cover. The plates have openings at locations corresponding to the opened ends of the tube units. The plates are physically coupled with the front and rear covers. The plates are also attached to the core with a cladding material by a brazing operation.

Abstract: An apparatus for evaluating a performance of a plasma-polymerized polymer layer using a UV spectrometer, including a polymerizing chamber for forming a polymerized polymer layer on a surface of a substrate by plasma discharging, a UV probe mounted contactless to the polymerized polymer layer formed in the polymerizing chamber and transmitting/receiving UV to and from the polymer layer and a UV spectrometer analyzing a signal inputted from the UV probe. With this apparatus, the characteristic of the surface of the substrate having a polymer layer consecutively polymerized by plasma can be evaluated in a contactless way, and the evaluation can be performed without affecting the process parameters such as the degree of vacuum within the chamber.

Abstract: An apparatus for evaluating a performance of a plasma-polymerized polymer layer using a UV spectrometer, including polymerizing chamber for forming a polymerized polymer layer on a surface of a substrate by plasma discharging, a UV probe mounted contactless to the polymerized polymer layer formed in the polymerizing chamber and transmitting/receiving UV to and from the polymer layer and a UV spectrometer analyzing a signal inputted from the UV probe. With this apparatus, the characteristic of the surface of the substrate having a polymer layer consecutively polymerized by plasma can be evaluated in a contactless way, and the evaluation can be performed without affecting the process parameters such as the degree of vacuum within the chamber.