JONGLAK CHOI, Ph.D.

**** ******** ***., ***. *** 319-***-****

Raleigh, NC 27606 acry4p@r.postjobfree.com

SUMMARY

Creative problem-solver with sincere enthusiasm for several areas of materials chemistry research.

Over 15 years of experience in various kinds of analytical instruments from a diverse range of academic laboratories in GLP environment with short GMP experience.

Skillful at data acquisition and details of research data with organic or inorganic materials achieved from various microscopic and spectroscopic instrument including ICP-AE for elemental analysis of materials, and good adaptability for new chemical or mechanical instrument environment.

Strong organizational skills and multi-tasking abilities.

Good communication skills and strong desire to develop positive rapport with colleagues.

In 2013, obtained U.S. green card and permanent residency status.

SELECTED OPERATION AND MAINTAINANCE SKILLS ON SCIENTIFIC CHARACTERIZATION

X-ray diffraction (powder and single crystal) including use of Fullprof software (Rietveld) or single-crystal structure soluton methods.

Multiple spectroscopic methods: FT-IR, Raman, Polarimetry, 1H, 13C-NMR, UV-Vis including DRS, Mass spectrometry (EI, MALDI-TOF), XPS, XANES, NEXAFS, ICP-AE, AA, Photo-luminescence, with being familiar with chromatographic tools; LC, HPLC etc.

Thermal analysis including DSC and TG-DTA.

Electron microscopy: SEM, TEM including EDS and SAED.

Experienced in EPR and SQUID magnetic measurements.

BET surface area measurements, CASTEP software and Density Functional Theory (DFT) calculations of band structures, and Photo Electrochemical Cell (PEC) testing for thin-film photovoltaics, Dynamic Light Scattering (DLS) for size distribution of suspended particles.

PROFESSIONAL & RESEARCH EXPERIENCE

Feb. 2011 – Feb. 2013 Postdoctoral Associate, Prof. Paul A. Maggard, Dept. of Chemistry, North Carolina State University:

Developed new synthesis systems to promote and control crystal growth in nanomaterials for better photocatalytic processing, specifically pertaining to high-performance photovoltaic solar cells.

Refined electrochemical methods used to produce hydrogen from water molecules used for photovoltaic film cell testing.

May 2007 – Feb. 2011 Postdoctoral Associate, Prof. John B. Wiley, Dept. of Chemistry, & Advanced Materials Research Institute (AMRI), University of New Orleans

Utilized topotactic chemical manipulation to control the structure of layered materials and to discover new materials.

Examined growth of functional single crystal ingots to study material properties and structures.

Sept. 2000 – Dec. 2006 Graduate Teaching & Research Assistant, Dept. of Chem., Univ. of Iowa

Developed non-aqueous solvothermal procedures for the functional nitride materials with nano-wire and nano-particulate morphologies.

Investigated the structural, morphological, optical, and magnetic properties of crystalline metal nitrides.

Mar. 1997 - Feb. 1999 Graduate Research Assistant, Dept. of Chemistry, Sejong University, Korea

EDUCATION

Ph.D. in Chemistry University of Iowa, Advisor: Prof. Edward G. Gillan, 2006

Thesis: Low Temperature Solvothermal Routes for Synthesis of Crystalline Group 13 and

Transition Metal Nitrides via Energetic Precursor Decomposition

M.S. in Chemistry Sejong University, Korea, Advisor: Prof. K. Shin, 1999

Thesis: Synthesis, Structures, and Properties of Thiophene Substituted Calix[n]pyrrole

B.S. in Chemistry Sejong University, Korea, 1997

EXPERTISE

Manipulating elements for the preparation of organometallic, and nano sized or bulk inorganic functional materials using ceramic and soft-chemical methods, plus handling high-pressure stainless-steel autoclave reactors ;hydro/solvo- thermal synthesis.

Hazardous chemical handling and corrosive gas line set-up and operation, such as Cl2 gas.

Air-free synthetic chemistry and maintaining inert atmosphere systems including glove-box, Schlenk line etc.

Growth of single crystal of materials using Optical Floating Zone technique.

Synthesis and single crystal growth of organic or inorganic ligand molecules and chromatographic purification for drug application or CVD (Chemical Vapor Deposition) application.

RECENT PUBLICATIONS

[1]A Metastable Cu(I)-Niobate Semiconductor with a Low Temperature Nanoparticle-Mediated Synthesis, J. Choi, N. King, and P. A. Maggard*, ACS Nano, 2013, 7(2), 1699 – 1708.

[2]Room Temperature Oxidative Intercalation with Chalcogen Hydrides: Two-Step method for the Formation of Alkali-Metal Chalcogenide Arrays within Layered Perovskites, S. Ranmohotti, M. Montassersadi, J. Choi, Y. Yao, D. Mohanty, E. Josepha, and J. B. Wiley*, Mat. Res. Bull. 2012, 47, 1289 – 1294.

[3]Topochemical Manipulation of Perovskites: Low-Temperature Reaction Strategies for Directing Structure and Properties, S. Ranmohotti, E. Josepha, J. Choi, J. B. Wiley*, Adv. Mater. 2011, 23(4), 442 – 460.

[4]Building Alkali-Metal-Halide Layers within a Perovskite Host by Sequential Intercalation: (A2Cl)LaNb2O7 (A = Rb, Cs), J. Choi, X. Zhang, and J. B. Wiley*, Inorg. Chem. 2009, 48, 4811 – 4816.

[5]Solvothermal Metal Azide Decomposition Routes to Nanocrystalline Metastable Nickel, Iron, and Manganese Nitride, J. Choi, and E. G. Gillan*, Inorg. Chem. 2009, 48(10), 4470 – 4477.

[6]Low-Temperature Solvothermal Synthesis of Nanocrystalline Indium Nitride and Ga-In-N Composites from the Decomposition of Metal Azides, J. Choi and E. G. Gillan*, J. Mater. Chem. 2006, 16, 3774 – 3784.

[7]Structure of Nanocrystalline GaN from X-ray Diffraction, Rietveld and Atomic Pair Distribution Function Analyses, V. Petkov, M. Gateshki; J. Choi, E. G. Gillan*; Y. Ren, J. Mater. Chem. 2005, 15, 4654 – 4659.

[8]Solvothermal Synthesis of Nanocrystalline Copper Nitride from an Energetically Unstable Copper Azide Precursor, J. Choi and E. G. Gillan*, Inorg. Chem. 2005, 44(21), 7385 – 7393.

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