Patents by Inventor Eun-Ah YOU
Eun-Ah YOU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230366824Abstract: Provided is a digital surface-enhanced Raman scattering (SERS) sensing platform which allows quantitative detection of a substance to be detected reliably and reproducibly with an excellent limit of detection in a large dynamic range, including: a surface-enhanced Raman scattering (SERS) active reagent which includes Raman active particles including a spherical plasmonic metal core, a plasmonic metal shell having a surface unevenness, and a self-assembled monolayer including a Raman reporter positioned between the core and the shell; a Raman spectroscopic detection unit which performs Raman mapping based on a Raman spectrum which is detected by irradiating the active reagent with an excitation light; and a digital signal analysis unit which analyzes a quantitative detection signal of a substance to be detected by a combination of a Raman signal intensity calculated from the Raman spectrum and a digital count calculated from the Raman mapping.Type: ApplicationFiled: May 15, 2023Publication date: November 16, 2023Inventors: Eun-Ah YOU, Jae-Eul SHIM, Young Jun KIM
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Publication number: 20230168201Abstract: The present disclosure relates to a surface-enhanced Raman spectroscopy complex probe capable of effectively detecting a catecholamine compound even at extremely low concentrations. The complex probe includes a nanolaminate including a nanogap and metal nanoparticles. In this case, the nanolaminate and the metal nanoparticles are modified to a compound that may be bound to each functional group included in catecholamine, and thus, catecholamine included in an analyte is doubly recognized by the complex probe. In addition, since a hotspot emitting a strong SERS signal is formed by a nanogap included in a nanolaminate, it is possible to effectively detect a catecholamine compound even at extremely low concentrations.Type: ApplicationFiled: January 28, 2022Publication date: June 1, 2023Inventors: Eun-Ah YOU, Zhou WEI, Wonil NAM, Wansun KIM
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Publication number: 20230103705Abstract: Provided is a Raman-active particle which is a Raman-active particle for surface-enhanced Raman analysis, the particle including: a spherical plasmonic metal core; a plasmonic metal shell having surface unevenness; and a self-assembled monolayer which is bonded to each of the core and the shell and positioned between the core and the shell, and includes a Raman reporter.Type: ApplicationFiled: September 18, 2019Publication date: April 6, 2023Inventors: Eun-Ah YOU, Wansun KIM, Tae Geol LEE
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Publication number: 20230104961Abstract: Provided are a detection method and a detection device of a substance using surface-enhanced Raman scattering according to the present invention, the detection method according to the present invention including: bringing Raman-active particles into contact with a sample which may contain a substance to be detected, the Raman-active particle including a spherical plasmonic metal core, a plasmonic metal shell having surface unevenness, a self-assembled monolayer which is bonded to each of the core and the shell and positioned between the core and the shell, and includes a Raman reporter, and a first receptor which is positioned on a surface of the plasmonic metal shell and may be specifically bonded to the substance to be detected; and irradiating excitation light thereon to detect the substance to be detected in the sample.Type: ApplicationFiled: September 18, 2019Publication date: April 6, 2023Inventors: Eun-Ah YOU, Wansun KIM, Tae Geol LEE
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Publication number: 20220349826Abstract: Provided is a Raman-active nanoparticle including: a spherical plasmonic metal core; a plasmonic metal shell having surface irregularities; and a self-assembled monolayer which binds to each of the core and the shell, is positioned between the core and the shell, and includes a Raman reporter satisfying the following Chemical Formula 1: NO2—Ar—SH??(Chemical Formula 1) wherein Ar is a (C6-C12) arylene group.Type: ApplicationFiled: April 19, 2022Publication date: November 3, 2022Inventors: Eun-Ah YOU, Jae-Eul SHIM, Tae Geol LEE
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Patent number: 11479474Abstract: Provided is a method of preparing composite nanoparticles, which includes: a) preparing a metal nanocore having a nano-star shape from a first reaction solution in which a first metal precursor is mixed with a first buffer solution; b) fixing a Raman reporter in the metal nanocore; and c) forming a metal shell, which surrounds the nanocore in which the Raman reporter is fixed, from a second reaction solution in which the nanocore in which the Raman reporter is fixed, and a second metal precursor are mixed with a second buffer solution.Type: GrantFiled: October 23, 2018Date of Patent: October 25, 2022Assignee: Korea Research Institute of Standards and ScienceInventors: Eun-Ah You, Wansun Kim, Tae Geol Lee
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Publication number: 20210364509Abstract: Provided is a method of preparing Raman-active nanoparticles, which includes a) preparing a metal nanocore having a nano-star shape from a first reaction solution in which a first metal precursor is mixed with a buffer solution; b) fixing a Raman reporter in the metal nanocore; and c) forming a metal shell, which surrounds the nanocore in which the Raman reporter is fixed, from a second reaction solution in which a second metal precursor is mixed with the nanocore in which the Raman reporter is fixed. The Raman reporter has a binding affinity for each of a first metal of the metal nanocore and a second metal of the metal shell.Type: ApplicationFiled: October 10, 2018Publication date: November 25, 2021Inventors: Eun-Ah YOU, Wansun KIM, Tae Geol LEE
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Publication number: 20210331933Abstract: Provided is a method of preparing composite nanoparticles, which includes: a) preparing a metal nanocore having a nano-star shape from a first reaction solution in which a first metal precursor is mixed with a first buffer solution; b) fixing a Raman reporter in the metal nanocore; and c) forming a metal shell, which surrounds the nanocore in which the Raman reporter is fixed, from a second reaction solution in which the nanocore in which the Raman reporter is fixed, and a second metal precursor are mixed with a second buffer solution.Type: ApplicationFiled: October 23, 2018Publication date: October 28, 2021Inventors: Eun-Ah YOU, Wansun KIM, Tae Geol LEE
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Patent number: 10222695Abstract: Provided is a method for manufacturing a transparent substrate according to an exemplary embodiment of the present invention including: a) forming a photoresist layer satisfying D=m*(?/2n); b) manufacturing a ring-shaped pattern by exposing the photoresist layer and developing the exposed photoresist layer, using a photo mask including a transparent base and a plate-type metal dot formed contacting a light emitting surface of the transparent base; c) manufacturing a second mold to which the ring-shaped pattern is reversely transferred by using a substrate on which the ring-shaped pattern is formed as a first mold; and d) manufacturing the transparent substrate in which a ring-shaped transparent protrusion is integrally formed with the transparent base by filling a liquefied transparent resin in the second mold and curing the transparent resin and removing the second mold to transfer the ring-shaped pattern.Type: GrantFiled: September 25, 2015Date of Patent: March 5, 2019Assignee: Korea Research Institute of Standards and ScienceInventor: Eun-Ah You
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Patent number: 10108092Abstract: Provided is a photolithography method, including: a) forming a photoresist layer satisfying D=m*(?/2n) (D is a thickness of the photoresist layer, n is a refractive index of the photoresist, ? is a wavelength of irradiated light at the time of exposure, and m is a natural number of 1 or more) on a substrate; and b) manufacturing a photoresist pattern having a ring shape by exposing the photoresist layer and developing the exposed photoresist layer using a photo mask including a transparent substrate and a plate-type metal dot contacting a light emitting surface of the transparent substrate.Type: GrantFiled: June 9, 2015Date of Patent: October 23, 2018Assignee: Korea Research Institute of Standards and ScienceInventor: Eun-Ah You
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Publication number: 20180188646Abstract: Provided is a method for manufacturing a transparent substrate according to an exemplary embodiment of the present invention including: a) forming a photoresist layer satisfying D=m*(?/2n); b) manufacturing a ring-shaped pattern by exposing the photoresist layer and developing the exposed photoresist layer, using a photo mask including a transparent base and a plate-type metal dot formed contacting a light emitting surface of the transparent base; c) manufacturing a second mold to which the ring-shaped pattern is reversely transferred by using a substrate on which the ring-shaped pattern is formed as a first mold; and d) manufacturing the transparent substrate in which a ring-shaped transparent protrusion is integrally formed with the transparent base by filling a liquefied transparent resin in the second mold and curing the transparent resin and removing the second mold to transfer the ring-shaped pattern.Type: ApplicationFiled: September 25, 2015Publication date: July 5, 2018Inventor: Eun-Ah YOU
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Publication number: 20170307980Abstract: Provided is a photolithography method, including: a) forming a photoresist layer satisfying D=m*(?/2n) (D is a thickness of the photoresist layer, n is a refractive index of the photoresist, ? is a wavelength of irradiated light at the time of exposure, and m is a natural number of 1 or more) on a substrate; and b) manufacturing a photoresist pattern having a ring shape by exposing the photoresist layer and developing the exposed photoresist layer using a photo mask including a transparent substrate and a plate-type metal dot contacting a light emitting surface of the transparent substrate.Type: ApplicationFiled: June 9, 2015Publication date: October 26, 2017Inventor: Eun-Ah You
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Patent number: 9795982Abstract: An apparatus for dipping a substrate includes: a body having an internal plate formed therein, and including a backing plate provided over the internal plate; a crucible accommodating an aqueous solution therein and provided over the backing plate; a crucible driving unit provided in the body and connected to the crucible to move the crucible in a horizontal direction or a vertical direction of the body; a support having a lower end to which a substrate is fixed; a support driving unit provided to an upper side of the body and connected to the support to drive the support in a length direction of the support or rotate the support in the vertical direction of the body; and a controlling unit connected to the crucible driving unit and the support driving unit to control driving of the crucible driving unit and the support driving unit.Type: GrantFiled: May 19, 2015Date of Patent: October 24, 2017Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCEInventor: Eun-Ah You
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Publication number: 20170106394Abstract: An apparatus for dipping a substrate includes: a body having an internal plate formed therein, and including a backing plate 120 provided over the internal plate; a crucible accommodating an aqueous solution therein and provided over the backing plate; a crucible driving unit provided in the body and connected to the crucible so as to move the crucible in a horizontal direction or a vertical direction of the body; a support having a lower end to which a substrate is fixed; a support driving unit provided to an upper side of the body and connected to the support so as to drive the support in a length direction of the support or rotate the support in the vertical direction of the body; and a controlling unit connected to the crucible driving unit and the support driving unit to control driving of the crucible driving unit and the support driving unit.Type: ApplicationFiled: May 19, 2015Publication date: April 20, 2017Applicant: Korea Research Institute Of Standards and ScienceInventor: Eun-Ah YOU
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Patent number: 9490413Abstract: Disclosed is a new compound semiconductor material which may be used for thermoelectric material or the like, and its applications. The compound semiconductor may be represented by Chemical Formula 1 below: Chemical Formula 1 <Chemical Formula 1> Bi2TexSea-xInyMz where, in Chemical Formula 1, M is at least one selected from the group consisting of Cu, Fe, Co, Ag and Ni, 2.5<x<3.0, 3.0?a<3.5, 0<y and 0?z.Type: GrantFiled: September 18, 2014Date of Patent: November 8, 2016Assignee: LG CHEM, LTD.Inventors: Hyun-Woo Choi, Byung-Kyu Lim, Tae-Hoon Kim, Cheol-Hee Park, Eun-Ah You, O-Jong Kwon
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Publication number: 20160197256Abstract: Disclosed is a new compound semiconductor material which may be used for thermoelectric material or the like, and its applications. The compound semiconductor may be represented by Chemical Formula 1 below: Chemical Formula 1 <Chemical Formula 1> Bi2TexSen?xInyMz where in Chemical Formula 1, M is at least one selected from the group consisting of Cu, Fe, Co, Ag and Ni, 2.5<x<3.0, 3.0?a<3.5, 0<y and 0?z.Type: ApplicationFiled: September 18, 2014Publication date: July 7, 2016Applicant: LG CHEM, LTD.Inventors: Hyun-Woo CHOI, Byung-Kyu LIM, Tae-Hoon KIM, Cheol-Hee PARK, Eun-Ah YOU, O-Jong KWON