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UMass Lowell

UMass Lowell

Research Scientist

– Present

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Background

Summary

1. Proficient in organic, inorganic, organometallic, and polymer synthetic techniques, including nano material
2. Broad knowledge on one/multi photon absorptive material; Design, synthesis and purification of one/two photon active chromophores, such as quantum dots, fullerene derivatives, and conducting polymers and their application to photovoltaic, photodynamic therapy, and optical limiting
3. Extensive experience on polymer processing; Composite film fabrications, coatings and surface modification
4. In-depth knowledge of design and synthesis of water soluble/amphiphilic material
5. U.S. Permanent resident alien ( No visa support is needed)

Experience

Research Scientist

UMass Lowell
– Present (3 years 10 months)Lowell MA

(1) Identifying and optimizing pathway to synthesize organic and inorganic chromophores
(2) Fabrication of composite thin films for optical use
(3) Synthesis of fluorene derivatives for OLED application
(4) Maintaining/training NMR facilities
(5) Water compatible organic material for biomedical use
(6) Bioapplication of fullerenes, graphene, and sugars
(7) Modification of carbohydrates and application

PhD student

University of Massachusetts Lowell
(5 years 2 months)Lowell, MA, US

• Development of white light active chromophore for biomedical application
• Evaluation of chromophores for selective light attenuation by Femto Second Laser
- Synthesized chromophores which have high two photon absorption cross-section values over 10000 GM which have promising sensitivity for application to nonlinear optics

Intern(R&D)

Los Alamos National Laboratory
(1 year 8 months)Los Alamos, NM, US

• Heat catalyzed formation of gold/silver nanoparticle embedded PVP composite thin films
• Mechanism study in formation of metal nanoparticles, nanostructure, and submicron patterned sheets
• Modification in chemical structure of polyaniline film/membrane with thickness and acid dopping
• Synthesis of conjugate polymers and fullerene derivatives for photovoltaic application
- Proved reduction mechanisms of metal nanoparticles and quantum dot with analytical skills and their size were controlled with capping agent
- Found new method of compositing monodispersed metal nanoparticles at thin films in situ. Sizes of the nanoparticles were finely controlled by coating thickness and concentration
hotovoltaic application

Lab coordinator

Dept. of Chemistry, Konkuk University
(1 year)

Supervising, supply, and maintain undergraduate chemistry lab.
Teaching Organic chemistry Lab. General chemistry lab.

Languages

  1. English

    Full professional proficiency
  2. Korean

    Native or bilingual proficiency

Skills

  • Polymers
  • Materials
  • Thin Films
  • Characterization
  • Chromatography
  • TGA
  • Scanning Electron...
  • Chemistry
  • Research
  • UV-Vis
  • optical material
  • GPC
  • IR
  • raman
  • TEM
  • CD
  • IR spectroscopy
  • Fluorescence...
  • NMR spectroscopy
  • Mass Spectrometry
  • Composites
  • Nonlinear Optics
  • UV/Vis
  • NMR
  • R&D
  • Polymer Science
  • Inorganic Chemistry
  • Coatings
  • Purification
  • Polymer Characterization
  • Science
  • Nanomaterials
  • Differential Scanning...
  • Nanoparticles
  • Organic Chemistry
  • FTIR
  • AFM
  • Nanotechnology
  • Spectroscopy
  • Raman
  • See 25+  See less

Patents

Metal-polymer composites comprising nanostructures and applications thereof(Link)

United States US 2010091275 A1 2010041
Issued 2010

The present invention describes thermally treated, dense PANI films having a variety of nanostructures on the surface, and methods for controllably depositing the nanostructures.

Inventors:

Publications

Linear and Nonlinear Optical Properties of Photoresponsive [60]Fullerene Hybrid Triads and Tetrads with Dual NIR Two-Photon Absorption Characteristics(Link)

American Chemical Society
August 2013
Authors:
  • Seaho Jeon,
  • Joy Haley,
  • Jonathan Flikkema,
  • Venkatram Nalla,
  • Min Wang,
  • Matthew Sfeir,
  • Loon-Seng Tan,
  • Thomas Cooper,
  • Wei Ji,
  • Micheal R. Hamblin,
  • Long Y. Chiang

Synthesis of Photoresponsive Dual NIR Two-Photon Absorptive [60]Fullerene Triads and Tetrads(Link)

Molecules
August 2013
Authors:

Photoinduced electron-transfer mechanisms for radical-enhanced photodynamic therapy mediated by water-soluble decacationic C70 and C84O2 Fullerene Derivatives(Link)

Nanomedicine: Nanotechnology, Biology and Medicine
2013
Authors:
  • Felipe F. Sperandio,
  • Sulbha K. Sharma,
  • Min Wang,
  • Seaho Jeon,
  • Ying-Ying Huang,
  • Tianhong Dai,
  • Suhas Nayka,
  • Suzana C. O. M. de Sousa,
  • Long Y. Chiang,
  • Michael R. Hamblin

Synthesis and Photodynamic Effect of New Highly Photostable Decacationically Armed [60]- and [70]Fullerene Decaiodide Monoadducts To Target Pathogenic Bacteria and Cancer Cells(Link)

Journal of Medicinal Chemistry/American Chemical Society
2012
Authors:

Unique Ultralow 18π-Trannulenyl HOMO–LUMO Energy Gap of Photostable Emerald-Green D3d-2-Methylmalonato[60]fullerenes(Link)

The Journal of Physical Chemistry Letters/American Chemical Society
2011
Authors:

Large Femtosecond Two-Photon Absorption Cross Sections of Fullerosome Vesicle Nanostructures Derived from a Highly Photoresponsive Amphiphilic C60-Light-Harvesting Fluorene Dyad(Link)

American Chemical Society
2011
Authors:
  • Min Wang,
  • Venkatram Nalla,
  • Seaho Jeon,
  • Venkatesh Mamidala,
  • Wei Ji,
  • Loon-Seng Tan,
  • Thomas Cooper,
  • Long Y. Chiang,

Polymer-assisted preparation of metal nanoparticles with controlled size and morphology(Link)

J. Mater. Chem. /The Royal Society of Chemistry
January 2011

We describe here a one-step synthesis of hybrid metal nanoparticles (MNPs) and polymer composites on glass substrates using poly(vinyl pyrrolidone) (PVP) as both the reducing agent and polymer matrix. With this method, it takes only one minute to produce a nanocomposite thin film that contains MNPs with controlled size and morphology. The size and morphology of gold nanoparticles can be manipulated by simply modulating the ratio between the PVP and the Au precursor, while the nearly monodispersed spherical silver nanoparticles are insensitive to the reaction conditions, which is believed to result from a better control over the crystal structure of the Ag seeds than that of the Au seeds in the presence of PVP. Moreover, the resulting MNP-polymer composites are high-quality thin films with tunable optical properties-the [small lambda]max of absorption spectra changes from 480 nm to greater than 580 nm (from blue to red color). This environmentally friendly synthetic technique may open up a new avenue for facile nanomaterial synthesis that is not accessible by conventional solution chemistry.

Authors:
  • Seaho Jeon,
  • ping xu,
  • Nathan H. Mack,
  • Hsinhan Tsai,
  • Long Y. Chiang,
  • Hsing-Lin Wang

Field-assisted synthesis of SERS-active silver nanoparticles using conducting polymers(Link)

Nonoscale / The Royal Society of Chemistry
2010

A gradient of novel silver nanostructures with widely varying sizes and morphologies is fabricated on a single conducting polyaniline-graphite (P-G) membrane with the assistance of an external electric field. It is believed that the formation of such a silver gradient is a synergetic consequence of the generation of a silver ion concentration gradient along with an electrokinetic flow of silver ions in the field-assisted model, which greatly influences the nucleation and growth mechanism of Ag particles on the P-G membrane. The produced silver dendrites, flowers and microspheres, with sharp edges, intersections and bifurcations, all present strong surface enhanced Raman spectroscopy (SERS) responses toward an organic target molecule, mercaptobenzoic acid (MBA). This facile field-assisted synthesis of Ag nanoparticles via chemical reduction presents an alternative approach to nanomaterial fabrication, which can yield a wide range of unique structures with enhanced optical properties that were previously inaccessible by other synthetic routes.

Authors:
  • Ping Xu,
  • Seaho Jeon,
  • Nathan H. Mack,
  • Stephen K. Doorn,
  • Darrick J. Williams,
  • Xijiang Han,
  • Hsing-Lin Wang

Facile Synthesis and Electrical Properties of Silver Wires through Chemical Reduction by Polyaniline(Link)

The Journal of Physical Chemistry C / American Chemical Society
2010

We demonstrate here for the first time a facile fabrication of silver wire (SW) structures with a wide range of sizes and morphologies through direct chemical reduction by polyaniline (PANI). The synthesis of SW is mostly determined by the nature of the PANI dopant and silver nitrate concentration. Time-resolved optical microscopy allows monitoring the growth of SWs in real time and reveals the possible growth mechanism. Temperature-dependent resistance of a SW with 150 nm diameter by a four-probe method shows typical resistance behavior of silver metal, and the electrical conductivity is 2.1 × 105 S/cm at room temperature. The morphology-dependent electrical properties of these SWs are measured using a two-probe method. The wires comprised of self-assembled silver nanoparticles usually have lower electrical conductivities than those with smooth surfaces, due to the presence of growth defects and enhanced surface scattering. Current−voltage (I−V) curve measurements in a wide potential range either break down or cause surface transformation of the SWs by a synergism of electromigration and surface diffusion. A SW network that shows surface transformation after I−V curve measurement displays a higher resistance. The study of the electrical stability of the SWs opens up a new view of the applicable feasibility of metal nanowires in nanoelectronic devices.

Authors:
  • Ping Xu,
  • Seaho Jeon,
  • Houtong Chen,
  • Hongmei Luo,
  • Guifu Zou,
  • Quanxi Jia,
  • Marian Anghel,
  • Christof Teuscher,
  • Darrick Williams,
  • Bin Zhang,
  • Hsing-Lin Wang

Synthesis of Cationic Dumbbell-shaped Fullerene Nanostructures as Potential Photodynamic Sensitizers(Link)

Journal of Macromolecular Science, Part A: Pure and Applied Chemistry
2010

A design of novel hydrophilic tetracationic dumbbell-shaped [60]fullerene nanostructures was made by balancing the hydrophilicity and hydrophobicity characteristics of the fullerene adduct for their potential application as photodynamic sensitizers in the PDT treatment. A sequential protection-deprotection reaction pathway was applied for the functional differentiation between primary and secondary amine moieties of pentaethylene hexamine. Synthesis of the target molecule involves two key steps of unsymmetrical esterification and amidation of malonic acid and subsequent fullerenation. The synthetic strategy was accomplished using mild reaction conditions in the intermediate molecule preparation and led a moderate overall product yield.

Authors:
  • Sammaiah Thota,
  • Seaho Jeon,
  • Min Wang,
  • Long Y. Chiang

Facile Fabrication of Homogeneous 3D Silver Nanostructures on Gold-Supported Polyaniline Membranes as Promising SERS Substrates(Link)

Langmuir / American Chemical Society
2010

We report a facile synthesis of large-area homogeneous three-dimensional (3D) Ag nanostructures on Au-supported polyaniline (PANI) membranes through a direct chemical reduction of metal ions by PANI. The citric acid absorbed on the Au nuclei that are prefabricated on PANI membranes directs Ag nanoaprticles (AgNPs) to self-assemble into 3D Ag nanosheet structures. The fabricated hybrid metal nanostructures display uniform surface-enhanced Raman scattering (SERS) responses throughout the whole surface area, with an average enhancement factor of 106−107. The nanocavities formed by the stereotypical stacking of these Ag nanosheets and the junctions and gaps between two neighboring AgNPs are believed to be responsible for the strong SERS response upon plasmon absorption. These homogeneous metal nanostructure decorated PANI membranes can be used as highly efficient SERS substrates for sensitive detection of chemical and biological analytes.

Authors:
  • Ping Xu,
  • Seaho Jeon,
  • Nathan H. Mack,
  • Stephen K. Doorn,
  • Xijiang Han,
  • Hsing-Lin Wang

Evolution of polymer structure, redox behavior and Photophysical Properties of a Series of Ethylene Glycol substituted Poly(phenylenevinylene)(Link)

ACS Applied Materials & Interfaces / American Chemical Society
2010

We report the synthesis of a series of water-soluble, fluorescent, conjugated polymers via the Gilch reaction with an overall yield greater than 40%. The yield for the Gilch reaction decreases with the increase in the length of the side chain (ethylene glycol repeat units), presumably due to the steric effects inhibiting the linking of monomeric units. The hydrophilic side chain enhances the solubility of the polymer in water and concomitantly leads to a side-chain-dependent conformation and solvent-dependent quantum efficiency. An increase in the ethylene glycol repeat units on the polymer side chain structure results in changes in chain packing; hence, the crystallinity evolves from semicrystalline to liquid crystalline to completely amorphous. An increase in the length of the side chain leads to changes in the polymer−solvent interaction as manifested in the photophysical properties of these polymers. These novel polymers exhibit two glass transition temperatures, which can be readily rationalized by differences in microstructure when casted from hydrophobic and hydrophilic solvents. Cyclic voltammograms of polymer 1d−3d suggest two-electron transfer, as compared to P1 which has one complete redox pair. The potential of having a nanoscaled domain structure and stabilizing two electrons on a polymer chain signifies the potential of these polymers in fabricating electronic and photovoltaic devices.

Authors:
  • Chun-Chih Wang,
  • Hung-Hsin Shih,
  • Seaho Jeon,
  • HsinHan Tsai,
  • Leeyih Wang,
  • Zhihua Xu,
  • Mircea Cotlet,
  • Hsing-Lin Wang

Understanding and controlled drowth of silver nanoparticles using oxidized N-methyl-pyrrolidone as a reducing agent(Link)

The Journal of Physical Chemistry C / American Chemical Society
2010

We report a facile synthesis of silver nanoparticles (AgNPs) by using a new reducing agent, pretreated N-methyl-pyrrolidone (NMP*). The resulting AgNPs are characterized by using UV−vis, TEM, and X-ray spectroscopy. These AgNPs exhibit strong surface enhanced Raman scattering response on addition of 4-mercaptobenzoic acid. A possible redox mechanism involving silver ion and NMP* was proposed. The oxidized species resulting from thermally treated NMP/O2 were analyzed by nuclear magnetic resonance and gas chromatography techniques, and it was determined that 5-hydroxy-N-methyl-2-pyrrolidone played the role of reducing agent. The facile synthesis of functional metal nanoparticles via an environmentally friendly procedure with control in particle size, and understanding of the reaction mechanisms pave the ways to further developing metal nanoparticles for chemical and biological detections.

Authors:
  • Seaho Jeon,
  • Ping Xu,
  • Nathan H. Mack,
  • Long Y. Chiang,
  • Leif Brown,
  • Hsing-Lin Wang

A Reduction Pathway in the Synthesis of PbSe Nanocrystal Quantum Dots(Link)

Journal of the American Chemical Society / American Chemical Society
2009

Colloidal nanocrystal quantum dots (NQDs) of narrow band gap materials are of substantial general interest because of their unparalleled potential as infrared fluorophores. While PbSe NQDs are a promising class of infrared-active nanocrystals due to high emission quantum yields and a wide useful spectral range, typical synthetic methods are sensitive to a variety of factors, including the influence of solvent/ligand impurities that render reproducibility difficult. In this work, we specifically examine the effects of diphenylphosphine and 1,2-hexadecanediol, as surrogates for putative trioctylphosphine-based reducing impurities, on the synthesis of PbSe NQDs. Specifically, we compare their influence on NQD size, chemical yield, and photoluminescence quantum yield. While both additives substantially increase the chemical yield of the synthesis, they demonstrate markedly different effects on emission quantum yield of the product NQDs. We further examine the effects of reaction temperature and oleic acid concentration on the diol-assisted synthesis. Increased oleic acid concentration led to somewhat higher growth rates and larger NQDs but at the expense of lower chemical yield. Temperature was found to have an even greater effect on growth rate and NQD size. Neither temperature nor oleic acid concentration was found to have noticeable effects on NQD emission quantum yield. Finally, we use numerical simulations to support the conjecture that the increased yield is likely a result of faster monomer formation, consistent with the activation of an additional reaction pathway by the reducing species.

Authors:
  • Jin Joo,
  • Jeffrey M. Pietryga,
  • John A. McGuire,
  • Seaho Jeon,
  • Darrick J. Williams,
  • Hsing-Lin Wang,
  • Victor I. Klimov

Synthesis and characterization of nanostructured polypyrroles: Morphology-dependent electrochemical responses and chemical deposition of Au nanoparticles(Link)

Polymer / Science Direct
2009

We report here the preparation of nanostructured polypyrroles (PPys) with different morphologies (nanospherical or nanofibrillar) through a surfactant-assisted oxidative polymerization route. Nanofibrillar PPy has a higher redox current, presumably due to a higher surface area accessible to the electrolytes and a lower charge transfer resistance compared to that of the spherical PPy. The impedance spectrum of spherical PPy at lower frequencies suggests a semi-infinite diffusion process, while nanofibrillar PPy displays barrier diffusion and capacitor characteristics. Electrodeless (chemical) deposition of Au particles from AuCl4- aqueous solution using nanostructured PPy also shows different morphologies, presumably due to a difference in growth kinetics dominated by the differences in surface area and surface chemistry. Our work demonstrates control over the electrochemical responses and charge transfer mechanisms of these conducting polymers. This control arises from their unique length scale geometries and surface areas that allows for the fabrication of Au nanoparticles with tunable morphologies. Our work in the controlled synthesis of nanostructured conducting polymers and metal nanoparticles opens up new opportunities for nanofiber-based electronic and sensory devices.

Authors:
  • Ping Xu,
  • Xijiang Han,
  • Bin Zhang,
  • Nathan H. Mack,
  • Seaho Jeon,
  • Hsing-Lin Wang

Controlling Layer Thickness and Photostability of Water-Soluble Cationic Poly(p-phenylenevinylene) in Multilayer Thin Films by Surfactant Complexation(Link)

Langmuir / American Chemical Society
2008

In this work we build on prior studies of the novel water-soluble cationic conjugated polymer known as poly{2,5-bis[3-(N,N,N-triethylammonium bromide)-1-oxapropyl]-1,4-phenylenevinylene}) with a focus on its incorporation into thin films for such applications as photovoltaics or electroluminescent devices. Multilayer assemblies were constructed using P2, the anionic surfactant sodium dodecyl sulfate (SDS), and the polyanion poly(sodium 4-styrene-sulfonate) (PSS) using the technique of layer-by-layer electrostatic self-assembly (LBL-ESA). SDS was observed to affect the layer thicknesses and absorbance characteristics of the films. We show that the optical properties and photo-oxidative resistance can be improved by varying the SDS content in the assemblies. Specifically, the surfactant-complexed poly(p-phenylenevinylene) (PPV) shows an enhanced absorption at longer wavelengths as well as improved photostability. Therefore, our work may have broad implications on the development of stable PPV-based materials in general and their efficient integration into thin films technologies.

Authors:
  • Jeremi S. Treger,
  • Vincent Y. Ma,
  • Yuan Gao,
  • Chun-Chih Wang,
  • Seaho Jeon,
  • Jeanne M. Robinson,
  • Hsing-Lin Wang,
  • Malkiat S. Johal

Synthesis and Characterization of C60 Dyads with Highly Photoactive Dicyanoethylenylated Diphenylaminofluorene Chromophore Antenna(Link)

Journal of Macromolecular Science, Part A: Pure and Applied Chemistry
2008

We designed and synthesized a novel class of highly photoactive C60(>CPAF-Cn) nanostructures for their potential uses as photonic materials, using CPAF-Cn chromophore as the light-harvesting antenna. It is a part of our research effort on developing C60(>DPAF-Cn)-based nonlinear photonic organics. We extended the structural modification by chemical conversion of the keto group in C60(>DPAF-Cn) compound to a 1,1-dicyanoethylenyl moiety with stronger electron-withdrawing ability that resulted in a largely increased electronic polarization of the chromophore conjugate. Structural characterization of several C60(>CPAF-Cn) containing variable alkyl sidechains was made by various spectroscopic methods. Interestingly, the chemical modification leads to a large bathochromic shift of the major absorption band of C60(>CPAF-Cn) in the visible spectrum up to 600 nm and extending the photoresponsive capability of C60(>CPAF-Cn) nanostructures to longer red wavelengths than the parent C60(>DPAF-Cn) materials.

Authors:
  • Seaho Jeon,
  • Grace So,
  • Robinson Anandakathir,
  • Tizoon Canteenwala,
  • Loon-Seng Tan,
  • Kenneth Pritzker,
  • Long Y. Chiang

Nonlinear optical transmission properties of C60 dyads consisting of a light-harvesting diphenylaminofluorene antenna(Link)

The Journal of Physical Chemistry B / American Chemical Society
2008

Highly enhanced nonlinear absorption cross section values of C60(>DPAF-C2M), C60(>DPAF-C9), and C60(>DPAF-C10) dyads were detected up to 5400, 9700, and 14000 GM, respectively, in the 2.0 ps region in toluene at the concentration of 1.5 x 10 -3M. They were correlated to a trend showing higher efficiency in light transmittance attenuation down to 39-46% for the dyads C60(>DPAF-C10) and C60(>DPAF-C9) with the increase of irradiance intensity up only to 140 GW/cm2. The phenomena were attributed to additional enhancement on the excited-state absorption of 1C60*(>DPAF-Cn) in the subpicosecond to picosecond region over the two-photon absorption of C60(>DPAF-Cn) in the femtosecond region. Its accumulative 2.0 ps absorption cross sections were estimated to be 8900 GM for 1C60*(>DPAF-C9), roughly one order of magnitude higher than its intrinsic femtosecond 2PA cross sections.

Authors:
  • Hendry Elim,
  • Seaho Jeon,
  • Sarika Verma,
  • Wei Ji,
  • Loon-Seng Tan,
  • Augustine Urbas,
  • Long Y. Chiang

Alternative synthesis of C60-diphenylaminofluorene derivatives for nonlinear photonic applications: method of preparation and characterization(Link)

Journal of Macromolecular Science, Part A: Pure and Applied Chemistry
2007

An alternative synthetic route for the preparation of key intermediate synthons 7-a-bromoacetyl-2-diphenylaminofluorene (a-BrDPAF-H) and 7-a-bromoacetyl-9,9-dialkyl-2-diphenylaminofluorene (a-BrDPAF-Cn) was demonstrated. The latter reactions involved the first step of dialkylation of 2-bromofluorene at C9 position of the fluorene moiety, the second step of a diphenylamino group attachment at C2 position of the resulting dialkylfluorene, and the third step of Friedel-Craft acylation of a-bromoacetyl group at C7 position of dialkylated diphenylaminofluorene. From the intermediates a-BrDPAF-H and a-BrDPAF-Cn, a series of C60-keto-DPAF nanostructures, such as the fullerene monoadducts C60(>DPAF-H) and C60(>DPAF-Cn), where n is 2, 4, or 10, were synthesized in a reasonable yield. Molecular mass ions of the dyads C60(>DPAF-H), C60(>DPAF-C2), C60(>DPAF-C4), and C60(>DPAF-C10) were clearly detected in positive ion matrix-assisted laser desorption ionization mass spectrum (MALDI-TOF) that confirmed the composition mass of each compound synthesized.

Authors:
  • Seaho Jeon,
  • Robinson Anandakathir,
  • Jason Chiang,
  • Long Y. Chiang

Facile syntheses, structural characterizations, and isomerization of disiloxane-1,3-diols(Link)

Journal of Organometallic Chemistry / Science Direct
2003

In the hydrolysis reaction of dichlorosilanes having an intramolecular coordinating atom, dcisiloxane-1,3-diols, [(OH){o-(CH3)2NCH2-C6H4}RSi]2O(R=CH2=CH (1), C6H5 (2), o-(CH3)2NCH2C6H4 (3), Me (4)), were obtained in high yields. The results of the crystal structure analyses of meso-2, rac-2a, rac-2b and 3 are reported. They showed strong intramolecular hydrogen bondings between the hydroxy group and the nitrogen atom. We have also found that the diastereomeric isomerization of meso-2 to rac-2 in CDCl3 solvent containing moisture occurred to result in the 55:45 equilibrium mixtures of the isomers and vice versa.

Authors:
  • Hyeon Mo Cho,
  • Seaho Jeon,
  • Han Kuk Lee,
  • Jung Hoon Kim,
  • Sangwoo Park,
  • Moon-Gun Choi,
  • Myong Euy Lee

Education

University of Massachusetts at Lowell

Ph. D., Polymer science/plastics engineering option

College of Sciences Graduate Research Scholar Award University of Massachusetts Lowell (2010)
Outstanding Graduate Student in Polymer Science University of Massachusetts Lowell (2009)

Activities and Societies: Member of ACS(2005-) Chairman of Korean Graduate Student Association at University of Massachusetts Lowell (2006-2007)

Yonsei University

M.S., Organometallics

Teaching and rsearch assistant

Activities and Societies: Chairman of Graduate Student Association of Chemistry Department at Yonsei University (2000) Member of Korean chemical Society(1993-) Excellent poster of 88th Symposium of the Korean Chemical Society (2001)

Yonsei University

B.S, Chemistry

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