Sung Ha Park

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Sung Ha Park

Happy New Year, 2005, to YOU!

Sung Ha Park's Home {SEM | AFM| Google | M-W}

During SEM Operation, Spring, 2002

1. Prelude: Life is full of surprises!
I was born and raised in Korea during a period of growth, change and democratic thinking. Against the backdrop of society enthusiastic for growth and discovery, my childhood dream was to rub an Aladdin's Magic Lamp which would 'unlock the mysteries of nature' so that I could meet the God of the Nature. Following the desire, I entered Kyung-Hee University in department of Astronomy and Space Science in Korea studying astronomy with a minor in physics. Sensing that there was greater knowledge to be won overseas, I came to the United State of America. And, time goes on and on .........

"Looking for the natural law is a creative game physicists play with nature. The obstacles in the game are the limitations of experimental technique and our ignorance, and the goal is finding the physical laws, the internal logic that governs the entire universe. As scientists search for natural laws the ancient excitement of the hunt fills their minds;
they are after big game - the very soul of the universe".
(From "the Cosmic Code" written by Heinz R. Pagels)

2. I am currently working at
Dr. Gleb Finkelstein's Electronic Nanostructures Group in Dept. of Physics and
Dr. Thomas H. LaBean's DNA NanoTech. Group in Dept. of Computer Science at Duke University

Duke Univ. , Dept. of Physics, BOX 90305, Science Dr.,
Durham, NC 27708, U.S.A.
Phone : (919) 668-5261 (Chem Lab) or 660-2659 (Phy Lab),
E-mail : spark(at)phy(dot)duke(dot)edu, [(at)=@, (dot)=.]

3. EDUCATION
Duke University, Department of Physics, Graduate Student since August, 2000
University of Chicago (MS in Physical Sciences : June, 2000)
California State University at Northridge (CSUN) (MS in Physics : May, 1998)
California State University at Northridge (CSUN) (BS in Physics : August, 1996)

4. RESEARCH INTEREST

"There's Plenty of Room at the Bottom," An Invitation to Enter a New Field of Physics. Talked by Richard P. Feynman On 12/29/1959 at the annual meeting of the American Physical Society "In the year 2000, when they look back at this age, they will wonder why it was not until the year 1960 that anybody seriously to move in this direction (NanoScience and NanoTechnology)"

Self-assembled DNA and its applications

Fabrication of Single Electron Transistor and its applications

5. RESEARCH EXPERIENCE

(1) Computational Condensed Matter Physics (CSUN)
I had studied electronic correlation and ground state property of the Hubbard and the Anderson model in the absent and presence of magnetic field. The ground-state properties of the one-dimensional Hubbard model at half-filling are examined in the presence of a magnetic field using the generalized mean-field approach, which includes the spin-density and the electron–hole correlations on an equal footing. The GMF formalism provides insight into both the metal–insulator transition and the transition from itinerant to localized magnetism with applied field. The ground-state properties of the symmetric Anderson lattice model in one dimension have been studied using a local mean-field decoupling approach and a renormalized perturbation expansion for the self-energy. The total energy, the local moment, the effective hybridization, the density of states, and the momentum distribution function have been calculated as a function of the coulomb interaction, the hybridization, and the band filling.

(2) Nanoparticle based Single Electron Transistor (Duke)
Single electron transistors (SET) based on nanopaticles have recently attracted a considerable attention because they can be used as core elements for near future ultra low power, high density integrated circuits. We address the properties of SET based on magnetic nanoparticles. I fabricated a few nanometer scale iron nanoparticle SET and measure its electrical and magnetic properties. I studied sample preparation techniques using nanotubes, electron-beam lithography and the manipulation of nanoparticles using an atomic force microscope. I had played with several nanoparticles such as Fe (5~10nm), FePt (5~10nm) and Au (2.6~12nm). I had performed room temperature I-V measurement using ~10nm Fe nanoparticles. Electron transport properties were studied at low temperature in order to observe Coulomb blockade oscillations such as current-voltage, dI/dV characteristics.

(3) DNA Self-Assembly and Nano Biological Applications (Duke)
Self-assembled DNA tiles provide a programmable methodology for bottom-up nanometer scale construction of patterned structures, utilizing macromolecular building blocks based on branched DNA, that self-assemble into periodic and aperiodic lattices. An obvious advantage of DNA self-assembly for this application is that the fabrication will proceed in massively parallel fashion such that millions of copies of a desired structure will be created simultaneously. In our recent paper [Science, 301, 1882-1884 (2003)], we had described the design and construction of the 4 × 4 DNA tile that contains four 4-arm DNA branched-junctions. Further I have developed nanotrack and nangrid using two types of unit tiles so that I use this as alternated targeted deposition templates of proteins or metallic nanoparticles with nanometer scale precision. I have also involved several projects for creating new and novel self-assembled DNA motifs such as three helix bundle, triple crossover lattices, nanoactuator and synthetic duplex DNA. I have designed and developed new way to create superstructures using hierarchical assembly and software called DSeCA (DNA Sequence Curvature Analyzer) for 3D visualization of DNA base sequence dependent tile curvature.

(4) DNA Self Assembly and Nano Physical Appications (Duke)
DNA nanostructures do not appear in themselves to have good properties as electrical conductivities or devices. Instead the significance of patterned DNA nanostructures lies in their application as scaffolds or templates for organizing and positioning other materials. I study fabrication and characterization of a novel class of conductive nanostructures based on the DNA scaffolds. I work both with the unmodified double-stranded DNA molecules and the complex DNA nanostructures based on DNA tiles. We have developed a novel electroless deposition technique to metallize DNA in solution, and applied it to coat double-stranded DNA molecules for making metallic and superconducting nanowires. The metallized wires have a diameter down to 15 nm, which are among the thinnest metal wires available to date by any method. The wires have been contacted by leads formed by electron beam lithography and show ohmic behavior with resistances of ~1 kohm. I also present more complex DNA templates such as 4 × 4 nanoribbons, three helix bundles, triple crossover nanotubes as well. We are about to conduct extensive measurements of the low-temperature magnetoresistance (MR) of thin metallic, Ag, and superconducting, V, nanowires. Results of measuring MR will be used to determine the localization and electron-electron interactions in nanoelectronic devices.

6. ACTIVITY AND AWARD

(1) Member of International Society for Nanoscale Science, Computation and Engineering (ISNSCE)
(2) Member of American Physical Society
(3) Member of W.M. Keck Computational Materials Theory in Dept. of Physics at CSUN
(4) Member of Electronic Nanostructures Group in Dept. of Physics at Duke University
(5) Member of DNA Nanotechnology Group in Dept. of Computer Science at Duke University
(6) National Science Foundation Fellowship at CSUN and Duke University
(7) Graduation with Sigma Pi Sigma at CSUN (May, 1998)
(8) Organizing BICORN (Biologically Inspired COmputation, Robotics and Nanotechnology)-SOFT Seminar series

7. PEER REVIEWED JOURNAL PUBLICATION

Computational Condensed Matter Physics
(1) "One-Dimensional Hubbard model in the presence of magnetic field,"
Nicholas Kioussis, Armen Kocharian and Sung Ha Park,
Journal of Magnetism and Magnetic Materials, Vol. 177-181, 575-576 (1998)

(2) "Antiferromagnetism of the half-filled Anderson lattice in one-dimension,"
Costas Papatriantafillou, Nicholas Kioussis and Sung Ha Park,
Physical Review B, Vol. 60, 13 355 (1999)

(3) "The One-Dimensional periodic Anderson model: A Mean Field study,"
Costas Papatriantafillou, Nicholas Kioussis, Sung Ha Park and Armen Kocharian,
Physica B, Vol. 259-261, 208-209 (1999)

(4) "Magnetic Crossover in the one-dimensional Hubbard Model in the presence of magnetic field,''
Armen Kocharian, Nicholas Kioussis and Sung Ha Park,
Journal of Physics: Condensed Matter, Vol. 13, 6759-6772 (2001)

Self-Assembled DNA Lattices and Electronic Nanostructures
(5) "DNA-Templated Self-Assembly of Protein Arrays and Highly Conductive Nanowires,"
Hao Yan, Sung Ha Park, Gleb Finkelstein, John H. Reif and Thomas H. LaBean,
Science, Vol. 301, 1882-1884 (2003)

(6) "A Two State DNA Lattice Actuated by DNA Motors,"
Liping Feng, Sung Ha Park, John H. Reif and Hao Yan,
Angewandte Chemie Int. Ed., 42, 4342-4346 (2003)

(7) "DNA templated self-assembly of protein and nanoparticle linear arrays,"
Hanying Li, Sung Ha Park, John Reif, and Thomas LaBean and Hao Yan,
J.Am.Chem.Soc., Vol. 126, 418-419, January (2004)

(8) "DNA nanotubes self-assembled from TX tiles as templates for conducting nanowires,"
Dage Liu, Sung Ha Park, John Reif and Thomas LaBean,
PNAS, Vol. 101, No. 3, 717-722 (2004)

(9) "Electronic Nanostructures Templated on Self-assembled DNA Scaffolds,"
Sung Ha Park, Hao Yan, John Reif, Thomas LaBean and Gleb Finkelstein,
Nanotechnology, Vol. 15, S525-S527 (2004)

(10) "Programmable DNA Self-assemblies for Nanoscale Organization of Ligands and Proteins,"
Sung Ha Park, Peng Yin, John Reif, Thomas LaBean, and Hao Yan
Submitted for publication

(11) "Self-assembled DNA nanobundles as Templated for Silver Nanowires,"
Sung Ha Park, Hanying Li, Robert Barish, John Reif , Gleb Finkelstein, Hao Yan and Thomas LaBean
Submitted for publication

(12) "Metallic Nanowires Templated on Native and Synthetic double-stranded DNA Scaffolds,"
Sung Ha Park, John Reif, Thomas LaBean and Gleb Finkelstein,
Submitted for publication

(13) "Finite Length Hierarchical Assembly of Complex Superstructures from Simple DNA Tile Sets,"
Sung Ha Park, Sang Jung Ahn, John Reif and Thomas LaBean,
Submitted for publication

Journal link.

A. General:

B. Physics:

7. Applied Physics A: Materials Science & Processing | 8.Journal of Applied Physics | 9.Journal of physics: Condensed Matter |

10.Measurement Science and Technology | 11.Review of Scientific Instruments |

C. Biology and Chemistry:

(left) Electronic Nanostructures Group, Department of Physics, Spring, 2002 [My advisor, Gleb Finkelstein: 2nd from left, me: far left] (right) DNA Nanotechnology Group, Department of Computer Science, Summer, 2003 [My advisor, Thomas H. LaBean: 2nd from right, me: 2nd from left]

NanoCat, Soon-Dol, 6 years old (in 2004)

Last Modified: Nov. 18, 2004