Abstract: Disclosed herein are an RF biosensing system, a method of manufacturing an RF biosensor used in the same, and a method of controlling the same. The RF biosensing system allows dementia screening without any painful or uncomfortable procedure through rapid detection of biomarkers for Alzheimer's disease present in a patient's bodily fluids. In addition, the RF biosensing system is very helpful for preventing Alzheimer's disease due to the ability to detect triggers for dementia long before onset of symptoms and easily monitor the progression of Alzheimer's disease using simple and inexpensive equipment.

Abstract: A photoluminescence display panel for three-axis focal point length conversion includes: a lens layer having a two-dimensional Fresnel pattern formed thereon to adjust a path of light entering from a light source; a light conversion layer stacked on the lens layer to convert a color of light that has pass through the lens layer; and a power supply unit for directly applying a voltage to the lens layer, in which as the lens layer is partitioned into a plurality of areas and the power supply unit adjusts the voltage applied to each area of the lens layer partitioned into a plurality of areas, a focal point position can be changed in a three-dimensional space, and thus the aperture and resolution of the display panel can be enhanced.

Abstract: A photoluminescence display panel for three-axis focal point length conversion includes: a lens layer having a two-dimensional Fresnel pattern formed thereon to adjust a path of light entering from a light source; a light conversion layer stacked on the lens layer to convert a color of light that has pass through the lens layer; and a power supply unit for directly applying a voltage to the lens layer, in which as the lens layer is partitioned into a plurality of areas and the power supply unit adjusts the voltage applied to each area of the lens layer partitioned into a plurality of areas, a focal point position can be changed in a three-dimensional space, and thus the aperture and resolution of the display panel can be enhanced.

Abstract: The present invention relates to a three-dimensional graphene composite, a preparation method for the same, and a supercapacitor including the same, and more particularly to a three-dimensional graphene composite including at least one electrode material nanoparticle selected from a transition metal hydroxide, a transition metal oxide and a conducting polymer as adsorbed onto the surface of a three-dimensional graphene foam, a preparation method for the three-dimensional graphene composite, and a supercapacitor including the three-dimensional graphene composite.

Abstract: A method of measuring biological sample properties and a biological sample property measuring apparatus is provided. A method of measuring biological sample properties includes disposing a biomaterial to contact a sensing unit, detecting a radio frequency (RF) signal flowing through the sensing unit, and obtaining an RF property indicator of the biomaterial based on the detected RF signal.

Abstract: A highly sensitive carbon-nanomaterial-based gas sensor for use in high-humidity environments and a method of improving the sensitivity thereof, the gas sensor being configured such that a functional group for binding to a water molecule is formed on the surface of a first detector composed of a carbon nanomaterial, whereby a hydronium ion (H3O+) is produced and thus an additional ion conduction path is formed, thereby obtaining an additional reaction path in high-humidity environments, ultimately improving the sensitivity and detection threshold of the sensor. The gas sensor includes a substrate, a first detector disposed on the substrate, electrodes electrically connected to the first detector, and a second detector disposed on the first detector, wherein the second detector has a hydrophilic functional group.

Abstract: A method for forming a PN junction in graphene includes: forming a graphene layer, and forming a DNA molecule layer on a partial region of the graphene layer, the DNA molecule layer having a nucleotide sequence structure designed to provide the graphene layer with a predetermined doping property upon adsorption on the graphene layer. The DNA molecule has a nucleotide sequence structure designed for doping of graphene so that doped graphene has a specific semiconductor property. The DNA molecule is coated on the surface of the graphene layer of which the partial region is exposed by micro patterning, and thereby, PN junctions of various structures may be formed by a region coated with the DNA molecule and a non-coated region in the graphene layer.

Abstract: An optical logic gate includes: a DNA based nanostructure including DNA and metal nanoparticles coupled to the DNA, the DNA based nanostructure being configured to rotate a polarization plane of an incident light; a polarizer to which light passing through the DNA based nanostructure is incident, the polarizer being configured to extract a component in a direction of a predetermined reference axis from light whose polarization plane is rotated by the DNA based nanostructure; and a detection unit to which light passing through the polarizer is incident, the detection unit being configured to generate a logic signal based on a result obtained by comparing the intensity of the component in the reference axis direction extracted by the polarizer with a predetermined threshold value.

Abstract: A sensing apparatus using a radio frequency and a manufacturing method thereof is provided. A sensing apparatus using a radio frequency includes a protecting layer configured to protect a substrate from migration of electrons occurring as the radio frequency is applied to a first electrode and a second electrode, a channel forming layer configured to form a channel based on a field between the first electrode and the second electrode, the channel forming layer using a polarized carbon-based nano material to form the channel, and a sensing layer configured to sense glucose using a medium material that is attached on the carbon-based nano material.

Abstract: A high frequency circuit includes a first electronic device, a second electronic device, and a graphene interconnection unit, where at least one of a trench and a via is defined under the graphene interconnection unit.

Abstract: The present invention relates to a flame retardant comprising graphene oxide wherein phosphorus is doped on the surface and a preparation method thereof, and more specifically relates to a technique relating to a flame retardant, which dopes phosphorus component having flame retardance in a very high rate through a simple method, based on the graphene oxide, a form wherein graphene which is difficult to be synthesized chemically is oxidized. When coating the flame retardant on a subject such as fabric, since it forms a layer preventing the transfer of heat in combustion, there are advantages that it can effectively prevent fire without a change of the surface, except for a little shrinkage, has the remarkable durability without forming any toxic material which can be harmful to a human and environment, and it can be mass-produced with low price, and it can be applied to the various industrial fields.

Abstract: A method of measuring biological sample properties and a biological sample property measuring apparatus is provided. A method of measuring biological sample properties includes disposing a biomaterial to contact a sensing unit, detecting a radio frequency (RF) signal flowing through the sensing unit, and obtaining an RF property indicator of the biomaterial based on the detected RF signal.

Abstract: The present invention relates to a three-dimensional graphene composite, a preparation method for the same, and a supercapacitor including the same, and more particularly to a three-dimensional graphene composite including at least one electrode material nanoparticle selected from a transition metal hydroxide, a transition metal oxide and a conducting polymer as adsorbed onto the surface of a three-dimensional graphene foam, a preparation method for the three-dimensional graphene composite, and a supercapacitor including the three-dimensional graphene composite.

Abstract: A method for forming a PN junction in graphene includes: forming a graphene layer, and forming a DNA molecule layer on a partial region of the graphene layer, the DNA molecule layer having a nucleotide sequence structure designed to provide the graphene layer with a predetermined doping property upon adsorption on the graphene layer. The DNA molecule has a nucleotide sequence structure designed for doping of graphene so that doped graphene has a specific semiconductor property. The DNA molecule is coated on the surface of the graphene layer of which the partial region is exposed by micro patterning, and thereby, PN junctions of various structures may be formed by a region coated with the DNA molecule and a non-coated region in the graphene layer.

Abstract: An optical logic gate includes: a DNA based nanostructure including DNA and metal nanoparticles coupled to the DNA, the DNA based nanostructure being configured to rotate a polarization plane of an incident light; a polarizer to which light passing through the DNA based nanostructure is incident, the polarizer being configured to extract a component in a direction of a predetermined reference axis from light whose polarization plane is rotated by the DNA based nanostructure; and a detection unit to which light passing through the polarizer is incident, the detection unit being configured to generate a logic signal based on a result obtained by comparing the intensity of the component in the reference axis direction extracted by the polarizer with a predetermined threshold value.

Abstract: A photoluminescence wavelength tunable material may include a composite including a graphene oxide layer and metal nanoparticles attached on the graphene oxide layer. By attaching the metal nanoparticles to the graphene oxide, the photoluminescence wavelength (i.e., the color of emitted light) of the graphene oxide may be tuned while maintaining the structure and physical properties of graphene oxide. The photoluminescence wavelength tunable material may be applied to an energy harvesting device such as a solar cell which exhibits high efficiency with less loss of light.

Abstract: A method of measuring biological sample properties and a biological sample property measuring apparatus is provided. A method of measuring biological sample properties includes disposing a biomaterial to contact a sensing unit, detecting a radio frequency (RF) signal flowing through the sensing unit, and obtaining an RF property indicator of the biomaterial based on the detected RF signal.

Abstract: A sensing apparatus using a radio frequency and a manufacturing method thereof is provided. A sensing apparatus using a radio frequency includes a protecting layer configured to protect a substrate from migration of electrons occurring as the radio frequency is applied to a first electrode and a second electrode, a channel forming layer configured to form a channel based on a field between the first electrode and the second electrode, the channel forming layer using a polarized carbon-based nano material to form the channel, and a sensing layer configured to sense glucose using a medium material that is attached on the carbon-based nano material.

Abstract: A method of multi-stage substrate etching and a terahertz oscillator manufactured by using the method are provided. The method comprises the steps of forming a first mask pattern on any one surface of a first substrate, forming a hole by etching the first substrate using the first mask pattern as an etching mask, bonding, to the first substrate, a second substrate having the same thickness as a depth to be etched, forming a second mask pattern on the second substrate bonded, forming a hole by etching the second substrate using the second mask pattern as an etching mask, and removing an oxide layer having the etching selectivity between the first substrate and the second substrate.

Abstract: A high frequency circuit includes a first electronic device, a second electronic device, and a graphene interconnection unit including graphene and which connects the first and second electronic devices, where an interlayer distance of the graphene is greater than or equal to about 0.34 nanometer.