Byung Sun Chun

Gun Hyung Park

Jeong Suk Park

In Chang Chu

Han Joo Lee

jong Wook Park

Min Sung Song

Il Sang Yoo

Yun Ki Lee

Byung Seok O

Jin woo Cho

Joon-young Soh

Seung Pil Ko

Ji Ung Cho

Ji Hyun Min

You Song Kim

Se Dong Kim

Ju Hun Lee

Gi Ju Han

Kyung Ho Kim

Boo Hyun An

Do Kyun Kim

Moon Kyu Cho

Soo Jung No

Hye Min Ji

Ji Sung Lee

Ah Young Song

Jae Ho Jeong

Do Hyung Kim

In Tak Jeon

Yeon Sub Lee

Seung jae Yoon

Seung Hyun Kim

Bong Gun Kim

Ha Young Yoon

Ji Seok Kim

Ki Ha Kim

Hyun Ah Cho

Young Soo Choi

Woo Seung Ham

Suyue Jin

Ji Beom Shin

Da Yeon Nam

Li Jun Pan

Yong Jin Kim

Bum Chul Park

Yoo Sang Jeon

Eunmin Yoo

Myeong Soo Kim

Junho Park

In Ho Cha

Gyu Won Kim

Min Jun Ko

Seunghyun Kim

Hyeon Su Park

Taesoon Kim

Taehyun Kim

Yong Su Jo

Sang won Byun

Jun Hwan Moon

Minhyeok Lee

Thomas Myeongseok Koo

Thomas Daebeom Lee

Eunsoo Oh

Professor Young Keun Kim's research team at Korea University has successfully implemented magnetic nanoscale helical structures and achieved control over electron spin transport.

김영근 교수의 고려대학교 연구팀은 자기 나노 스케일 나선 구조를 성공적으로 구현하고 전자 스핀 수송을 제어했습니다.

Switching behavior of indium selenide-based phase-change memory cell

편집위원회명단 외

Influence of freelayer in magnetic tunnel junction on switching of submicrometer magnetoresistive random access memory arrays

The pH dependence of Co-Cu alloy thin films fabricated on amorphous substrate by DC electrodeposition

Analysis on giant magnetoresistive characteristics of synthetic antiferromagnet-based spin valves with modified pinned layers

The Comparison of the Property of CoSiB/Pt Multilayers to Co/Pt and CoFe/Pt with Perpendicular Magnetic Anisotropy

The Measurement of Torque Magnetometer for Characterizing Perpendicular Magnetic Anisotropy

Inductively Coupled Plasma Reactive Ion Etching of Nanometer-Patterned Magnetic Tunnel Junction Stack for STT-MRAM

Microstructure and magnetic properties of LaSrMnO nanoparticles and their application to cardiac immunoassay

Compositional dependence of magnetic properties in CoFe/Au nanobarcodes

Dimensional dependence of magnetic properties in arrays of CoFe/Au barcode nanowire

편 집 위 원 회 명 단

ZnO–Ag Composite Nanocrystals from Nanoemulsion: Synthesis, Magnetic, and Optical Properties

Magnetic anisotropy evolution in CoFe/Au barcode nanowire arrays

Immunochromatographic assay of hepatitis B surface antigen using magnetic nanoparticles as signal materials

Crystallographic Orientation and Microstructure-Dependent Magnetic Behaviors in Arrays of Ni Nanowires

Transport properties of magnetic tunnel junctions comprising NiFeSiB/CoFeB hybrid free layers

Magnetotransport and trapping of magnetic domain walls in spin valves with nanoconstrictions

Giant diamagnetism in AuFe nanoparticles

Synthesis and Magnetic Properties of Multifunctional FeO-AuPt Core-Shell Nanoparticles

Fabrication of Multifunctional Au Doped CoPt Nanowires

Role of the Heavy Metal's Crystal Phase in Oscillations of Perpendicular Magnetic Anisotropy and the Interfacial Dzyaloshinskii-Moriya Interaction in …

Interface effect on antisymmetric exchange interaction in nanostructures

Magnetization reversal of ferromagnetic nanosprings affected by helical shape

Soft magnetic properties of sub 10 nm NiFe and Co films encapsulated with Ta or Cu

한국표면공학회지 투고규정

Synthesis, microstructure, and physical properties of metallic barcode nanowires

Lithium powder anodes utilizing microcage structures in lithium secondary cells

Synthesis and microwave properties of highly permeable FeCo‐based nano‐alloys

MR characteristics of synthetic ferrimagnet based spin-valves with different pinning layer thickness ratios

Magnetic tunnel junctions stabilized by modified synthetic antiferromagnets

Electrochemical preparation of Co3Pt nanowires

Fabrication of suspended single-walled carbon nanotubes via a direct lithographic route

Localized electroporation effect on adherent cells in modified electric cell–substrate impedance sensing circuits

Spin-Orbit Torque Engineering in\beta-W/CoFeB Heterostructures via Ta and V Alloying at Interfaces

Interface and microstructure evolutions in synthetic ferrimagnet-based spin valves upon exposure to postdeposition annealing

Synthesis of FeO-AuPt Core-shell Nanoparticles

Microstructure and Magnetic Properties of CoFe Nanowires and Helical Nanosprings

Perpendicular magnetic anisotropy and interfacial dzyaloshinskii-moriya interaction in pt/cofesib structures

White-light-emitting magnetite nanoparticle–polymer composites: photonic reactions of magnetic multi-granule nanoclusters as photothermal agents

Synthesis and Characterization of Magnetic La $ _ {1-x} $ Sr $ _x $ MnO $ _3 $(0$\leg $ x $\leg $0.5) Nanoparticles Using a Simple Thermal Hydro-Decomposition of …

Magneto-transport characteristics of magnetic tunnel junction with a synthetic antiferromagnetic amorphous CoFeSiB free layer

Bias voltage dependence of magnetic tunnel junctions comprising double barriers and CoFe/NiFeSiB/CoFe free layer

Optimization of Ru intermediate layer in CoCr‐based perpendicular magnetic recording media

Patent trend analysis of magnetic-fluorescent composites for immunoassay

Size-dependent changeover in magnetization reversal mode of self-assembled one-dimensional chains of spherical Fe3O4 nanoparticles

High Density MRAM Device Technology Based on Magnetic Tunnel Junctions

Anisotropic Nanocomposite NdFeB/-Fe Magnets Prepared by Spark Plasma Sintering

Synthesis and Characterization of Magnetic La1-xSrxMnO3 (0⦤ x⦤ 0.5) Nanoparticles Using a Simple Thermal Hydro-Decomposition of Acetate Precursor

Composition-dependent crystal structure and magnetism in nanocrystalline Co-rich alloy

Exchange coupling characteristics of bottom-type synthetic ferrimagnet based spin valves

Growth and Magnetic Properties of CoPtAu Nanowires

Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions

Magnetoresistance and interlayer diffusion in PtMn spin valves upon postdeposition annealing

Large enhancement of the intrinsic spin Hall conductivity in WN compounds

Resistive switching behavior in a Ni–Ag2Se–Ni nanowire

Structural and magnetoresistance characteristics of CoFe/Ag/NiFe/Ag composite discontinuous multilayers

Bioinspired redox-coupled conversion reaction in FeOOH-acetate hybrid nanoplatelets for Na ion battery

Self-assembly of fluorescent and magnetic Fe 3 O 4@ coordination polymer nanochains

Magnetoresistance variation of magnetic tunnel junctions with NiFeSiB/CoFeB free layers depending on MgO tunnel barrier thickness

Synthesis and Characterization of Core-Shell Nanowires

Vertical arrays of copper nanotube grown on silicon substrate by CMOS compatible electrochemical process for IC packaging applications

Magnetic Particle Spectrometry of Fe3O4 Multi-Granule Nanoclusters

Application of radially grown ZnO nanowires on poly-l-lactide microfibers complexed with a tumor antigen for cancer immunotherapy

Research Status and Prospectives of Magnetic Nanoparticles in Bio-medical Applications

Characteristics of magnetic tunnel junctions consisting of amorphous CoNbZr layers

Efficient intracellular delivery of biomacromolecules employing clusters of zinc oxide nanowires

철. 금 다층 나노선 개발.. 바이오 적용에 획기적 돌파구 마련

Spintronics 기술의현황및전망

Microwave absorption properties of magnetite multi-granule nanocluster–multiwall carbon nanotube composites

Experimental and Simulation Study to Identify Current-Confined Path in Cu–Al Space Layer for CPP-GMR Spin-Valve Applications

스핀전달토크형 자기저항메모리 (STT-MRAM) 기술개발 동향

Differential magnetometry on Fe2O3 nano-clustered particles

Radio frequency-mediated local thermotherapy for destruction of pancreatic tumors using Ni–Au core–shell nanowires

Design of recessed yoke heads for minimizing adjacent track encroachment

Effect of magnetic field annealing upon Co-rich nanowires

Numerical simulations of collective magnetic properties and magnetoresistance in 2D ferromagnetic nanoparticle arrays

Non-aqueous synthesis of water-dispersible Fe3O4–Ca3(PO4)2 core–shell nanoparticles

Ni–Au core–shell nanowires: synthesis, microstructures, biofunctionalization, and the toxicological effects on pancreatic cancer cells

Secondary electron dynamics in core–shell–satellite nanoparticles: a computational strategy for targeted cancer treatment

차세대 자기저항메모리 MRAM 기술의 특허동향 분석

Synthesis of Co nanotubes by nanoporous template-assisted electrodeposition via the incorporation of vanadyl ions

Enhanced laser-induced single-cycle terahertz generation in a spintronic emitter with a gradient interface

Structural and microwave properties of Fe-based nanopowders via mechanochemical synthesis

바이오-메디컬 자성나노입자 연구의 현황과 전망

Влияние интерфейса на антисимметричное обменное взаимодействие в наноструктурах

Modulating the Dzyaloshinskii-Moriya interaction in magnetic heterostructures

Synthesis and magnetic properties of multifunctional CoPtAu nanoparticles

A multifunctional core–shell nanoparticle for dendritic cell-based cancer immunotherapy

Magnetic multi-granule nanoclusters: A model system that exhibits universal size effect of magnetic coercivity

A highly sensitive and selective diagnostic assay based on virus nanoparticles

One-pot polyol synthesis of monosize PVP-coated sub-5 nm Fe3O4 nanoparticles for biomedical applications

Sub 5 nm magnetite nanoparticles: Synthesis, microstructure, and magnetic properties

Rapid ordering of Zr-doped FePt alloy films

Synthesis of streptavidin-FITC-conjugated core–shell Fe3O4-Au nanocrystals and their application for the purification of CD4+ lymphocytes

Iron-gold barcode nanowires

Magnetic changes in GMR heads caused by electrostatic discharge

A sensitive method to detect Escherichia coli based on immunomagnetic separation and real-time PCR amplification of aptamers

Materials quest for advanced interconnect metallization in integrated circuits

Isolation of DNA using magnetic nanoparticles coated with dimercaptosuccinic acid

Control of magnetic anisotropy of Co nanowires

Effect of the magnetic core size of amino-functionalized Fe3O4-mesoporous SiO2 core-shell nanoparticles on the removal of heavy metal ions

Magnetic Properties of Sputtered Fe Thin Films: Processing and Thickness Dependence

Sub 5 nm Fe3O4 nanocrystals via coprecipitation method

Photosensitizer and vancomycin-conjugated novel multifunctional magnetic particles as photoinactivation agents for selective killing of pathogenic bacteria

Application of ZnO-based nanocomposites for vaccines and cancer immunotherapy

Electrical and mechanical properties of tantalum nitride thin films deposited by reactive sputtering

Bumchul Park

Jiung Cho

NAM-HYUK CHO

Boohyun An

Alexander Samardak

Alexey Ognev

Myeongsoo Kim

Daniel Choi

PRASHANT SHARMA

Taek-Chin Cheong

Intak Jeon, Ph.D.

Min Hyeok Lee

Myung-Hwa Jung

SY Seong

Heon Lee

YOUNG KEUN KIM

Dendritic cell-based cancer immunotherapy requires tumour antigens to be delivered efficiently into dendritic cells and their migration to be monitored in vivo . Nanoparticles have been explored as carriers for antigen delivery, but applications have been limited by the toxicity of the solvents used to make nanoparticles, and by the need to use transfection agents to deliver nanoparticles into cells. Here we show that an iron oxide–zinc oxide core–shell nanoparticle can deliver carcinoembryonic antigen into dendritic cells while simultaneously acting as an imaging agent. The nanoparticle–antigen complex is efficiently taken up by dendritic cells within one hour and can be detected in vitro by confocal microscopy and in vivo by magnetic resonance imaging. Mice immunized with dendritic cells containing the nanoparticle–antigen complex showed enhanced tumour antigen specific T-cell responses, delayed tumour …

It is well known that the coercivity of magnetic nanomaterials increases up to a maximum and then decreases to zero with decreasing particle size. However, until now, no single synthesis method has been able to produce magnetic nanoparticles with a wide range of sizes, i.e., from 10 to 500 nm, in order to uncover the coercivity evolution. Here we report the characterization of magnetite (Fe 3 O 4 ) multi-granule nanoclusters (MGNCs) to demonstrate the transitional behaviour of coercivity. The M–H curves indicate that our samples had a relatively high saturation magnetization ( M S ) value of ~70 emu/g and that the coercivity ( H c ) increased to the maximum value of ~48 Oe until the nanoclusters reached a size of ~120 nm; the coercivity then gradually decreased to zero.

Early detection of the protein marker troponin I in patients with a higher risk of acute myocardial infarction ,,,, can reduce the risk of death from heart attacks ,,,, . Most troponin assays are currently based on the conventional enzyme linked immunosorbent assay and have detection limits in the nano- and picomolar range. Here, we show that by combining viral nanoparticles, which are engineered to have dual affinity for troponin antibodies and nickel, with three-dimensional nanostructures including nickel nanohairs, we can detect troponin levels in human serum samples that are six to seven orders of magnitude lower than those detectable using conventional enzyme linked immunosorbent assays ,,,,, . The viral nanoparticle helps to orient the antibodies for maximum capture of the troponin markers. High densities of antibodies on the surfaces of the nanoparticles and nanohairs lead to greater binding of the troponin …

Polyvinylpyrrolidone (PVP)-coated sub-5nm monosize Fe 3 O 4 nanoparticles were synthesized by reduction of Fe(III) acetylacetonate in the presence of PVP polymer as surfactant in one-pot polyol process. Their microstructure and magnetic properties were characterized by XRD, TEM/HRTEM and VSM. It is found that the nanoparticles have high crystallinity with distinct lattices and the magnetic measurements reveal their well-defined superparamagnetic behavior at room temperature. Such Fe 3 O 4 nanoparticles with tailorable size and tunable magnetic properties are promising for biomedical applications.

Magnetite particles of 2–4 nm were synthesized by an economic, biocompatible chemical coprecipitation route, with their size tuned by the reaction temperature. The microstructure and morphology of the nanoparticles were characterized by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM), whereas the magnetic properties were investigated by vibrating sample magnetometry (VSM) and superconducting quantum interference device (SQUID). It is found that the nanoparticles demonstrate well-defined superparamagnetic behavior as prepared and after annealing. Distinct lattices were observed which manifest the high crystallinity of such ultrasmall particles and the finite-size effect was revealed by analyzing the corresponding microstructure and magnetism.

The magnetic properties and microstructural evolution of Zr-doped FePt alloy films prepared by dc-magnetron sputtering were investigated. Compared to an undoped binary film, Zr-doped FePt alloy films showed accelerated ordering transformation kinetics accompanying smaller grains: we were able to fabricate a Zr-doped FePt film [e.g., ] possessing very fine grain size (5 nm in average) and high coercivity (7.3 kOe) within 10 min annealing at 500 °C. It is thought that the point defects and lattice strain introduced by Zr-doping activated the nucleation rate of the ordered phase. In particular, for Zr-doped FePt films containing less than 45 at. % Pt, the ordered phase was decomposed into a disordered phase after excessive annealing due to the formation of a Pt–Zr compound, most likely that reduces the effective Pt content in the ordered phase.

We explored the feasibility of magnetite (Fe 3 O 4 )-gold (Au) core–shell nanocrystals as a useful vehicle for biomedical application such as cell separation. Streptavidin-fluorescein isothiocyanate (STA-FITC) was conjugated to the surface of the Fe 3 O 4 -Au core–shell nanocrystals using a carbodimide activation protocol. These nanocrystals were further tested for their ability to bind CD4 + T lymphocytes, bound to biotin-labeled anti-CD4 mAbs, isolated from the spleen of C57BL/6 mice. Our data show that the Fe 3 O 4 -Au nanocrystals successfully pulled down CD4 + T lymphocytes from the whole splenocytes with high specificity. Therefore, our nanocrystals provide an efficient tool for the cell separation process and further present the dramatic potential to be applied to other areas of biomedical application including diagnosis, monitoring, and treatment of human diseases.

(Figure Presented) Stripped wires: Multifunctional (magnetic and optical) iron-gold barcode nanowires were electrochemically fabricated using nanoporous templates. Structural analysis by TEM elemental line scan and mapping (see images) clearly revealed the well-separated, bamboo-like nanostructures composed of Fe and Au strips.

The effects of current transients on the magnetic response of GMR sensors is studied. It is shown that GMR sensors with an FeMn exchange layer exhibit large magnetic changes after a single ESD current transient. The energy which results in magnetic failure is only 0.9 nJ, which is much less than the 6 nJ which causes physical melting damage to the GMR sensor. These serious magnetic changes are explained in terms of resetting of the FeMn exchange layer direction due to the elevated temperature and internal magnetic field during the current transient. It is concluded that ESD stress testing of GMR sensors has revealed a new and important magnetic failure mechanism in GMR sensors.

Aptamers, single-stranded nucleic acids, provide a unique opportunity as amplifiable molecules using polymerase chain reaction (PCR) as well as recognition molecules like antibodies. We report a highly sensitive detection of Escherichia coli by taking advantage of the aptamer amplification as well as the specific binding of aptamers onto E. coli. This unique approach consists of three steps. First, the target E. coli was captured by antibody-conjugated magnetic beads. Second, the RNA aptamers were bound onto the surface of captured E. coli in a sandwich way. Finally, the heat-released aptamers were amplified by using real-time reverse-transcriptase-PCR (RT-PCR). The aptamer amplification in this approach has enabled a sensitive detection of microorganisms, such as the detection of 10 E. coli in 1ml sample. When compared to the amplification of nucleic acids extracted from the target microorganisms, this …

Integrated circuits (ICs) are challenged to deliver historically anticipated performance improvements while increasing the cost and complexity of the technology with each generation. Front‐end‐of‐line (FEOL) processes have provided various solutions to this predicament, whereas the back‐end‐of‐line (BEOL) processes have taken a step back. With continuous IC scaling, the speed of the entire chip has reached a point where its performance is determined by the performance of the interconnect that bridges billions of transistors and other devices. Consequently, the demand for advanced interconnect metallization rises again, and various aspects must be considered. This review explores the quest for new materials for successfully routing nanoscale interconnects. The challenges in the interconnect structures as physical dimensions shrink are first explored. Then, various problem‐solving options are considered …

Lately, the isolation of DNA using magnetic nanoparticles has received increased attention owing to their facile manipulation and low costs. Although methods involving their magnetic separation have been extensively studied, there is currently a need for an efficient technique to isolate DNA for highly sensitive diagnostic applications. We describe herein a method to isolate and purify DNA using biofunctionalized superparamagnetic nanoparticles synthesized by a modified polyol method to obtain the desired monodispersity, followed by surface modification with meso-2,3-dimercaptosuccinic acid (DMSA) containing carboxyl groups for DNA absorption. The DMSA-coated magnetic nanoparticles (DMSA-MNPs) were used for the isolation of DNA, with a maximum yield of 86.16%. In particular, we found that the isolation of DNA using small quantities of DMSA-MNPs was much more efficient than that using commercial …

Professor

Information Devices and Materials Lab

교수님 소개

김영근

연구실 소개

연구실 키워드

알럼나이가 간 회사

연구실 지원 방법

대우 조건

연도별 논문 인용수

저널 & 학회 논문 출판 수

연구실 논문 목록

Large enhancement of the intrinsic spin Hall conductivity in WN compounds

Secondary electron dynamics in core–shell–satellite nanoparticles: a computational strategy for targeted cancer treatment

Enhanced laser-induced single-cycle terahertz generation in a spintronic emitter with a gradient interface

연구실 보유 특허

대학별 입시끈

우리 연구실 모집

교수님 소개

김영근

연구실 키워드

알럼나이가 간 회사

연구실 지원 방법

대우 조건

연도별 논문 인용수

저널 & 학회 논문 출판 수

연구실 논문 목록

Large enhancement of the intrinsic spin Hall conductivity in WN compounds

Secondary electron dynamics in core–shell–satellite nanoparticles: a computational strategy for targeted cancer treatment

Enhanced laser-induced single-cycle terahertz generation in a spintronic emitter with a gradient interface

연구실 보유 특허

최근 3년간 연구실적 높은 연구실

대학별 입시끈

우리 연구실 모집