Abstract: The present invention relates to a multifunctional wood preservative composition containing a compound prepared by reaction of hydrazine hydrate and boric acid and to a method for wood preservation treatment using the same. The wood preservative composition of the present invention can not only impart flame retardant, insect-repellent, rot-resistant, insect-repellent, and rust-proof effects to wood, such as various wooden structures including wooden cultural assets, but also causes no whitening and makes relatively fewer color changes for dancheong. Furthermore, the wood preservative composition of the present invention is provided as a one-component type liquid and thus can save time and costs for wood treatment and is convenient to use.

Abstract: The present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides and a method of manufacturing the same. More specifically, the present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides manufactured by attaching cationic transition metal precursor to bacterial surface, wherein the bacteria with high negative charge on its surface is used as a template, refluxing the bacteria and transition metal ions at room temperature in the presence of sodium borohydride (NaBH4), and inducing reduction/spontaneous oxidation, thereby having an excellent high capacity electrochemical properties, and a method of manufacturing the same.

Abstract: Provided is a dielectric ceramic composition comprising: 40-70 wt % of a borosilicate-based glass frit comprising 50-80 mol % of SiO2, 15-20 mol % of B2O3, 0.1-5 mol % of one or more alkali metal oxide selected from Li2O and Na2O, and 0.1-30 mol % of one or more alkaline earth metal oxide selected from MgO, CaO, SrO and ZnO; and 30-60 wt % of a ceramic filler represented by Chemical Formula 1: (Zn1-xMgx)2SiO4??(1) wherein 0?x?1. The disclosed low temperature co-fired ceramic (LTCC) composition is sinterable at low temperature, with a relative density of at least 95% in the temperature range of 800-900° C., is capable of minimizing electric loss, with a dielectric constant of 4-7 and a very low dielectric loss, and is applicable from the low-frequency band to the millimeter-wave band of 60 GHz or more.

Abstract: Provided is a dielectric ceramic composition comprising: 40-70 wt % of a borosilicate-based glass frit comprising 50-80 mol % of SiO2, 15-20 mol % of B2O3, 0.1-5 mol % of one or more alkali metal oxide selected from Li2O and Na2O, and 0.1-30 mol % of one or more alkaline earth metal oxide selected from MgO, CaO, SrO and ZnO; and 30-60 wt % of a ceramic filler represented by Chemical Formula 1: (Zn1-xMgx)2SiO4??(1) wherein 0?x?1. The disclosed low temperature co-fired ceramic (LTCC) composition is sinterable at low temperature, with a relative density of at least 95% in the temperature range of 800-900° C., is capable of minimizing electric loss, with a dielectric constant of 4-7 and a very low dielectric loss, and is applicable from the low-frequency band to the millimeter-wave band of 60 GHz or more.

Abstract: The present invention provides an electrode and a method of preparing the same. The electrode of the present invention is prepared by forming a nanostructured conductor comprising a metal or metal oxide on a substrate and forming an active material comprising metal oxide nanoparticles on the surface of the nanostructured conductor. The electrode of the present invention can be used in various electrochemical devices such as energy storage devices including secondary batteries, supercapacitors, etc., photocatalyst elements, thermoelectric elements, or composite elements thereof. Moreover, the electrode of the present invention can be applied to a lithium secondary battery, in which intercalation/deintercalation of lithium ions is performed, and especially applied to a negative electrode of the lithium secondary battery.

Abstract: An apparatus for fabricating ZnO nanostructures includes a heating element, a horizontal reaction tube having an inlet and an outlet. The reaction tube is positioned inside the interior cavity of the heating element with the inlet disposed to introduce a carrier gas into the reaction tube. The apparatus includes a source of a carrier gas in flow communication with the inlet, a container within the reaction tube that is disposed to receive and contain source materials comprising ZnO and graphite. An array of solid substrates is located on the container above the source materials. Adjacent substrates in the array are positioned with a space in between to allow the carrier gas to impinge on the source materials in the container.

Abstract: The present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides and a method of manufacturing the same. More specifically, the present invention relates to an organic-inorganic composite comprising bacteria and transition metal oxides manufactured by attaching cationic transition metal precursor to bacterial surface, wherein the bacteria with high negative charge on its surface is used as a template, refluxing the bacteria and transition metal ions at room temperature in the presence of sodium borohydride (NaBH4), and inducing reduction/spontaneous oxidation, thereby having an excellent high capacity electrochemical properties, and a method of manufacturing the same.

Abstract: The present invention relates to a transition metal oxide/multi-walled carbon nanotube nanocomposite and its preparation method, and particularly to a nanocomposite prepared in a composite form of an electron-transmitting and stress-relaxing one-dimensional multi-walled carbon nanotube (MWCNT) and a high-capacity-enabling zero-dimensional nanopowder-type transition metal oxide, where a transition metal oxide prepared by urea synthesis is uniformly dispersed in a carbon nanotube by a surfactant, and its preparation method. Therefore, a process of preparing a nanocomposite herein is simple and can be easily applied to a large-scale production, while enabling the manufacture of uniform-sized nanocomposites even at a relatively low temperature. Thus prepared nanocomposite can be applied to an electrochemical device such as a lithium secondary battery and a super capacitor.

Abstract: The present invention relates to a method for aligning semiconducting nanowires on a metal electrode (12), more particularly to a method for aligning semiconducting nanowires on a metal electrode (12) by which a zinc oxide nanowire and a silicon nanowire are synthesized on a specific region of an electrode made of Al, Ti, Pt, etc. and the nanowires are aligned on the wafer scale instantly as they are synthesized. The method for aligning semiconducting nanowires on a metal electrode (12) in accordance with the present invention makes it possible to manufacture multiple nanowire devices at low cost. Thus, the method in accordance with the present invention can be effectively utilized to produce various nano devices, including electronic devices, optoelectronic devices, laser devices, chemical sensors, etc. in large quantity.

Abstract: A semiconductor nanowire-based photosensor includes a substrate, at least a top surface of the substrate being formed of an insulator, two electrodes spaced at a predetermined interval apart from each other on the substrate, metal catalyst layers disposed respectively on the two electrodes, and visible-range semiconductor nanowires grown from the metal catalyst layers on the two electrodes. The semiconductor nanowires grown from one of the metal catalyst layers are in contact with the semiconductor nanowires grown from the other metal catalyst layer, while the semiconductor nanowires grown respectively from the metal catalyst layers on the two electrodes are floated between the two electrodes over the substrate.

Abstract: Disclosed are a method of fabricating ZnO nanostructures and its apparatus, and more particularly, to a method of fabricating ZnO nanostructures from Zn gas, which is produced by a reduction process between ZnO powder and graphite, on a silicon substrate, wherein various types of nanostructures are reproducibly generated by adjusting the processing temperature and the mixed ratio between oxygen and argon gases, which are introduced into the interior of a reaction tube as carrier gases, and its apparatus.

Abstract: There is provided a method of preparing biocompatible silicon nanoparticles, which comprises the steps of forming a silicon nanoparticle colloid by ultrasonic treatment of Si-containing Zintl salt in diethylene glycol diethyl ether (DGDE), and introducing hydroxyl groups into the surface of the silicon nanoparticle by treating the silicon nanoparticle colloid with a halogenated hydrogen solution. The method of the present invention can easily mass-produce silicon nanoparticles having high dispersion stability in an aqueous solution and biocompatibility in a high yield.

Abstract: Disclosed are a method of fabricating ZnO nanostructures and its apparatus, and more particularly, to a method of fabricating ZnO nanostructures from Zn gas, which is produced by a reduction process between ZnO powder and graphite, on a silicon substrate, wherein various types of nanostructures are reproducibly generated by adjusting the processing temperature and the mixed ratio between oxygen and argon gases, which are introduced into the interior of a reaction tube as carrier gases, and its apparatus.

Abstract: Disclosed are a method of fabricating ZnO nanostructures and its apparatus, and more particularly, to a method of fabricating ZnO nanostructures from Zn gas, which is produced by a reduction process between ZnO powder and graphite, on a silicon substrate, wherein various types of nanostructures are reproducibly generated by adjusting the processing temperature and the mixed ratio between oxygen and argon gases, which are introduced into the interior of a reaction tube as carrier gases, and its apparatus.

Abstract: Low dielectric constant dielectric ceramics for a borosilicate-based low temperature fired multi-layer substrate is disclosed which can be fired at a wide temperature range of above and below 900° C. and exhibits a low loss electrical property. By controlling the types and addition amount of the alkaline earth metal oxide, the linear shrinkage behavior can be considerably controlled while maintaining the electrical property unchanged. The composition facilitates matching a linear shrinkage with a heterogeneous material having certain shrinkage characteristics.

Abstract: A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25–35 and a quality factor (Qxf) of 6,000–20,000 GHz. The composition comprises 3–16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84–97 wt % of BaO—TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.

Abstract: A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25–35 and a quality factor (Qxf) of 6,000–20,000 GHz. The composition comprises 3–16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84–97 wt % of BaO—TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.

Abstract: A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25–35 and a quality factor (Qxf) of 6,000–20,000 GHz. The composition comprises 3–16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84–97 wt % of BaO—TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.

Abstract: A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25-35 and a quality factor (Qxf) of 6,000-20,000 GHz. The composition comprises 3-16 wt % of K2O-Na2O-Li 2O-B2O3-SiO2 system glass frit and 84-97 wt % of BaO-TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.

Abstract: A dielectric composition that can be fired at a temperature of below 900° C. The dielectric composition has a dielectric constant of 25-35 and a quality factor (Qxf) of 6,000-20,000 GHz. The composition comprises 3-16 wt % of K2O—Na2O—Li2O—B2O3—SiO2 system glass frit and 84-97 wt % of BaO—TiO2 system dielectric ceramics. The composition can be effectively applied to construct a part of a ceramic multi-layer packaging as a resonator form such as a filter or an antenna, etc.