Abstract: Provided are an apparatus and a method for recoding neuronal signals. The apparatus may include a substrate with an electrode region, a plurality of stimulation electrodes arranged on the electrode region to have a specific arrangement, and at least one recording electrode provided between adjacent ones of the stimulation electrodes and attached with an axon of the neuronal cell. Each of the stimulation electrodes may be attached with a body of a neuronal cell.

Abstract: Methods of growing a zinc oxide nanowire are provided. According to the method, developing a photoresist layer and etching a zinc oxide seed layer may be successively performed using a tetramethyl ammonium hydroxide aqueous solution. Thus, change of solutions may not be required, such that the number of processes may be reduced.

Abstract: Disclosed herein are a cell chip and a method of fabricating the same. The cell chip includes a cell-adhesivecell-adhesive layer disposed on a substrate. Photocrosslinked polymer barriers are disposed on the cell-adhesivecell-adhesive layer. The photocrosslinked polymer barriers may serve to restrict and grow cells only on the cell-adhesivecell-adhesive layer exposed between the barriers. Therefore, a cell growth direction may be precisely controlled. In addition, the photocrosslinked polymer barrier has a pattern formed by light, and simplifies a process of fabricating a cell chip.

Abstract: Provided is a voltage sensitive dye represented by Formula 7. Through connection of an electron donor with an electron acceptor by a triple bond, the voltage sensitive dye has a lower free rotation rate in molecular structures of the electron donor and the electron acceptor (e.g., photoisomerization), and thus fluorescence efficiency and voltage sensitivity to external electron stimulation can be improved.

Abstract: A method for detecting a target biological material using DNA barcodes is provided. The method is for detecting a target biological material (e.g., DNA) by using DNA barcodes by which a trace amount of target biological material can be detected in a rapid and economic manner without performing polymerase chain reaction (PCR). The method is characterized by the use of magnetic particles and polymer particles coated with DNA barcodes to sense a trace amount of a biological material (e.g., DNA).

Abstract: A method for detecting a target biological material using DNA barcodes is provided.

Abstract: The present invention relates to a method of manufacturing polymer nano particle having two-photon absorption compound at its central portion. The method of manufacturing polymer nano particle comprises the steps of dispersing a monomer for forming polymer nano particle and two-photon absorption compound into a solvent; supplying a given gas while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature, in order to remove the dissolved oxygen contained in the solvent; supplying polymerization initiators into the solvent while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature; and polymerizing the monomer for a given period of time while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature.

Abstract: The present invention relates to a method of manufacturing polymer nano particle having two-photon absorption compound at its central portion. The method of manufacturing polymer nano particle comprises the steps of dispersing a monomer for forming polymer nano particle and two-photon absorption compound into a solvent; supplying a given gas while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature, in order to remove the dissolved oxygen contained in the solvent; supplying polymerization initiators into the solvent while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature; and polymerizing the monomer for a given period of time while stirring the solvent in which the monomer and the two-photon absorption compound are dispersed at a given temperature.

Abstract: The present invention relates to an optical data storage medium and a device and method thereof; and, more particularly, to an optical data storage medium based on semiconductor luminescence, which is capable of limiting searching and recording of optical data to a certain location in three-dimensional, easy multi-stage data searching, controlling of luminescence wavelength, excellent durability of data, requiring relatively low energy compared to a method of damaging silica, one-time-recording and repeated-searching, and to a device and method for searching for and recording optical data based on the photon absorption effect. The method of recording optical data takes a semiconductor-dispersed-thin layer on an optically transparent medium as a recording layer. Data recorded in a certain layer is searched based on the luminescence property of nanometer-sized crystalline semiconductor by using single-photon or two-photon absorption.

Abstract: The present invention relates to the encapsulation for extending the lifetime of a flexible organic or polymer light emitting device and, more particularly, to encapsulation by sealing with multiple polymer films to prevent the penetration of oxygen and moisture into an organic or polymer light emitting device. Due to the encapsulation of polymer light emitting device with the multiple polymer films, exposure to moisture and oxygen are prevented, which are causes of device degradation. When using a plastic substrate whose the thermal endurance is high, simultaneously, it has a thermal endurance effect to the Joule heat during device operation. Accordingly, there can be fabricated an organic or polymer light emitting display whose lifetime is extended through the encapsulation of an organic of polymer light emitting device with multiple polymer films.

Abstract: There is disclosed a synthetic method of mixing a soluble poly(1,4-phenylenvinylene) (PPV) derivative in which two silyl groups are substituted, and an electroluminescent device using the same. In the poly[2,5-bis(dimethyloctylsilyl)-1,4-phenylenvinylene] (BDMOS-PPV) according to the present invention, the final polymer is easily dissolved in common organic solvents and shows a measured absolute PL quantum efficiency of 60% much higher than that of the conventional PPV having 25%, thus making it possible to be applied as material of an electroluminescent device. Also, it provides an outstanding advantage that it can be applied to a flexible light-emitting device.

Abstract: A polymer photodetector includes a resonant wavelength controller which resonates an optical beam with a particular wavelength only from the incident optical beam received thereinto through the rear surface of the reflection layer, so as to selectively detect the optical beam with the particular wavelength. The resonant wavelength controller includes a fixed mirror layer, a movable mirror layer, and an air layer disposed therebetween. The resonant wavelength can be adjusted by varying an optical length between the movable mirror layer and the fixed mirror layer. The optical length can be adjusted by varying the thickness of the air layer between the movable mirror layer and the fixed mirror layer by way of adjusting the electrostatic force.

Abstract: A method for manufacturing an organic EL display including an organic EL elements and an organic field effect transistors being integrated on a same substrate is disclosed. A semitransparent electrode layer of the organic EL element and a gate electrode of the organic transistor are formed on a same transparent plastic substrate. An organic gate insulating layer is deposited on the gate electrode and an organic semiconductor layer is formed on the organic gate insulating layer. A source and drain electrodes is formed on the organic semiconductor layer. An organic EL layer is formed on the semitransparent electrode layer and a part of the drain electrode. The organic semiconductor layer can be made of a charge transfer complex or a thiophene derivative polymer. The resultant EL device is capable of mechanically bent, and then is readily adaptable for use in flexible displays.

Abstract: There is disclosed a syntheitc method of mixing a soluble poly(1,4-phenylenvinylene)(PPV) derivative in which two silyl groups are substituted, and an electroluminescent device using the same. In the poly?2,5-bis(dimethyloctylsilyl)-1,4-phenylenvinylene! (BDMOS-PPV) according to the present invention, the final polymer is easily dissolved in common organic solvents and shows a measured absolute PL quantum efficiency of 60% much higher than that of the conventional PPV having 25%, thus making it possible to be applied as material of an electroluminnescent device. Also, it provides an outstanding advantage that it can be applied to a flexible light-emitting device.

Abstract: A method of manufacturing an organic/polymer electroluminescent device to effectively inject electrons and holes by forming a film consisting of a charge transfer complex or charge transfer salt between a organic/polymer electroluminescent layer and electrodes for injecting electrons and holes in order to increase an electroluminescent quantum efficiency, is disclosed. The inventive structure of organic/polymer electroluminescent device comprises a transparent substrate. A plurality of transparent electrodes is formed on a selected portions of the transparent substrate. A first film is formed on the entire surface of the resulting structure including the plurality of transparent electrodes formed on the selected portions of the transparent substrate. An emissive layer formed on the first film. A second film is then formed on the luminous layer. A plurality of metal electrodes is formed on a selected portions of the second film.

Abstract: A preparation method of polymerid rod using free radical bulk polymerization with temperature gradient, comprising the steps of, charging a mixture of monomer which can be subjected to a radical polymerization, polymerization initiator and cross linking agent into a reaction container of tube shape having a constant inner diameter and performing radical polymerization of the monomer, by passing the said reaction container in a constant dipping speed through a zone downwardly from upper part to lower part of the said zone, wherein the upper part of the zone is maintained at a relatively low temperature (TL) and the lower part of the zone is maintained at a relatively high temperature (TH) than that of the said upper part so that the medium part located between the upper part and lower part has a temperature gradient of (TH-TL)/L (wherein, L is defined as a vertical distance of the temperature-gradient zone).

Abstract: The present invention relates to a manufacturing method of a polymer GRIN lens which is used for focusing light in connections for example between two or more optical fibers and between an optical fiber and a light source in the optical communication field. The manufacturing method of a GRIN lens according to the present invention utilizes a characteristic of polystyrene that its refractive-index is decreased by sulfonation. The method includes polymerizing a sphere or rod made of a directional monomer that is capable of sulfonating like a styrene, together with a cross-linking agent, and a polymerization initiator; swelling the polymerized cross-linked polymer by using a predetermined solvent; and sulfonating the swollen cross-linked polymer using a sulfuric acid. Accordingly, the present method can be easily controlled to obtain the desired refractive-index distribution since the refractive-index distribution is determined by the diffusion of the sulfuric acid as a sulfonation.

Abstract: The present invention discloses an optical back-board interconnection module scheme applying optical technique in a back-board interconnection module scheme for distribution of communication signals among opto-electronic integrated circuit (OEIC) boards of data communication network or computer systems with ultra-high speed.The present invention provides a back-board interconnection scheme having out-coupling uniformity level of optical power of below 1% and total out-coupling efficiency of more than 99%, and a method for designing a focusing grating coupler (FGC) array used as an important component in the back-board interconnection scheme and FGC standard specification obtained by such a method.