Publications

2019

  1. Large-scale chemical vapor deposition growth of highly crystalline MoS 2 thin films on various substrates and their optoelectronic properties
    Current Applied Physics 19, 1127 (2019); DOI: 10.1016/j.cap.2019.07.007
    V. T. Nguyen, S. Ha, D.-I. Yeom, Y. H. Ahn, S. Lee, J.-Y. Park*

  2. Increasing the sensitivity of terahertz split ring resonator metamaterials for dielectric sensing by localized substrate etching
    Optics Express 27, 23164 (2019); DOI: 10.1364/OE.27.023164
    K. Meng, S. J. Park*, A. D. Burnett, T. Gill, C. D. Wood, M. Rosamond, L. H. Li, L. Chen, D. R. Bacon, J. R. Freeman, P. Dean, Y. H. Ahn, E. H. Linfield, A. G. Davies, J. E. Cunningham

  3. Strain Engineering of the Berry Curvature Dipole and Valley Magnetization in Monolayer MoS2
    Physical Review Letters 123, 036806 (2019); DOI: 10.1103/PhysRevLett.123.036806
    J. Son, K. H. Kim, Y. H. Ahn, H. W. Lee*, J. Lee*

  4. Electronic band alignment in AlGaN/GaN high electron-mobility transistors investigated using scanning photocurrent microscopy
    Current Applied Physics 19, 406 (2019); DOI: 10.1016/j.cap.2019.01.008
    Y. C. Kim, B. H. Son, H. Y. Jeong, K. H. Park, Y. H. Ahn*

2018

  1. Direct Measurement of Diffusion Length in Mixed Lead-halide Perovskite Films Using Scanning Photocurrent Microscopy
    Current Optics and Photonics 2, 514 (2018); DOI: 10.3807/COPP.2018.2.6.514
    A. R. Kim, B. H. Son, H. S. Kim, Y. H. Ahn*

  2. Humidity sensing using THz metamaterial with silk protein fibroin
    Optics Express 26, 33575 (2018); DOI: 10.1364/OE.26.033574
    H. S. Kim, S. H. Cha, B. Roy, S. Kim, Y. H. Ahn*

  3. Enhanced sensitivity in THz plasmonic sensors with silver nanowires
    Scientific Reports 8, 15536 (2018); DOI: 10.1038/s41598-018-33617-2
    J. T. Hong, S. W. Jun, S. H. Cha, J. Y. Park, S. Lee, G. A. Shin, Y. H. Ahn*

  4. Ultrafast Strong-Field Tunneling Emission in Graphene Nanogaps
    ACS Photonics 5, 3943 (2018); DOI: 10.1021/acsphotonics.8b00857; Cover for Oct. 2018
    B. H. Son, H. S. Kim, J.-Y. Park, S. Lee, D. J. Park* and Y. H. Ahn*

  5. Resonance Characteristics of THz Metamaterials Based on a Drude Metal with Finite Permittivity
    Current Optics and Photonics 2, 378 (2018); DOI: 10.3807/COPP.2018.2.4.378
    S. W. Jun, Y. H. Ahn*

  6. Phototransistors with Negative or Ambipolar Photoresponse Based on As-Grown Heterostructures of Single-Walled Carbon Nanotube and MoS2
    Advanced Functional Materials 28, 1802572 (2018); DOI: 10.1002/adfm.201802572 V. T. Nguyen, W. Yim, S. J. Park, B. H. Son, Y. C. Kim, T. T. Cao, Y. Sim, Y.-J. Moon, V. C. Nguyen, M.-J. Seong, S.-K. Kim, Y. H. Ahn, S. Lee, and J.-Y. Park*

  7. Facile fabrication of mesoporous photoanodes for dye-sensitized solar cells by microwave sintering of binder-free TiO2 paste
    Journal of Physics D: Applied Physics 51, 676 (2018); DOI: 10.1088/1361-6463/aad4ed
    S. Y. Kim, S. Y. Ryu, N. Y. Ha, Y. H. Ahn, J. Y. Park, S Lee*

  8. Enhanced nucleation and growth of HfO2 thin films grown by atomic layer deposition on graphene
    Journal of Alloys and Compounds 742, 676 (2018); DOI: 10.1016/j.jallcom.2018.01.273
    S. B. Kim, Y. H. Ahn, J.-Y. Park, S. W. Lee*

  9. Electrical properties of ion gels based on PVDF-HFP applicable as gate stacks for flexible devices
    Current Applied Physics 18, 500 (2018); DOI: 10.1016/j.cap.2018.02.017
    K. Chae, N. D. Cuong, S. Ryu, D.-I Yeom, Y. H. Ahn, S. Lee, J.-Y. Park*

  10. Evaluation of Transport Parameters in MoS2/Graphene Junction Devices Fabricated by Chemical Vapor Deposition
    ACS Appl. Mater. Interfaces 10, 5771 (2018); DOI: 10.1021/acsami.7b16177
    Y. C. Kim, V. T. Ngyuen, S. Lee, J.-Y Park*, Y. H. Ahn*

2017

  1. Carbon Nanotubes as Etching Masks for the Formation of Polymer Nanostructures
    ACS Appl. Mater. Interfaces 9, 44053 (2017); DOI: 10.1021/acsami.7b18035
    W. Yim, S. J. Park, S. Y. Han, Y. H. Park, S. W. Lee, H. J. Park, Y. H. Ahn, S. Lee, J.-Y Park*

  2. Electron beam induced removal of PMMA layer used for graphene transfer
    Sci. Rep. 7, 18058 (2017); DOI: 10.1038/s41598-017-18444-1
    B. H. Son, H. S. Kim, H. S. Jeong, J.-Y. Park, S. Lee, Y. H. Ahn*

  3. Accurate Measurement of THz Dielectric Constant Using Metamaterials on a Quartz Substrate
    Curr. Opt. Photon. 1, 637 (2017); DOI: 10.3807/COPP.2017.1.6.637
    S. J. Park, Y. H. Ahn*

  4. Terahertz Nanoprobing of Semiconductor Surface Dynamics
    Nano Letters 8, 6397 (2017); DOI: 10.1021/acs.nanolett.7b03289
    G. Choi, Y. M. Bhak, T. Kang, Y. Lee, B. H. Son, Y. H. Ahn, M. Seo*, D. S. Kim*

  5. Effects of Organic Thin Films on Local Resonance of Metamaterials under Photoexcitation
    Curr. Opt. Photon. 1, 372 (2017); DOI: 10.3807/COPP.2017.1.4.372
    M. S. Song, I. W. Hwang, C. L. Lee, C. Kang, C. S. Kee, S. J. Park, Y. H. Ahn, D. J. Park, J. W. Lee*

  6. Sensing viruses using terahertz nano-gap metamaterials
    Biomedical Optics Express 8, 3551 (2017); DOI: 10.1364/BOE.8.003551
    S. J. Park, S. H. Cha, G. A. Shin, Y. H. Ahn*

  7. Electronic Band Alignment at Complex Oxide Interfaces Measured by Scanning Photocurrent Microscopy
    Sci. Rep. 7, 3824 (2017); DOI: 10.1038/s41598-017-04265-9
    J. H. Yoon, H. J. Jung, J. T. Hong, J. Y. Park, S. Lee, S. W. Lee, Y. H. Ahn*

  8. Resonance Switching Using Ultrafast Laser in THz Plasmonic Devices Based on Hybrid Structure of Semiconductor and Carbon Nanotube
    J. Kor. Phys. Soc. 70, 1037 (2017); DOI: 10.3938/jkps.70.1037
    J. T. Hong, Y. H. Ahn*, S. B. Choi, D. J. Park*

  9. Terahertz slot antenna devices fabricated on silver nanowire network films
    Opt. Mater. Express 7, 1679 (2017); DOI: 10.1364/OME.7.001679
    J. T. Hong, S. J. Park, J-. Y. Park, S. Lee, Y. H. Ahn*

  10. Fabrication of terahertz metamaterials using electrohydrodynamic jet printing for sensitive detection of yeast
    J. Micromech. Microeng. 27, 035009 (2017); DOI: 10.1088/1361-6439/aa5a9f
    A. Tenggara, S. Park, H. Yudistira, Y. H. Ahn*, D. Byun*

  11. Contributions of Poly(3-hexylthiophene) Nanowires to Alteration of Vertical Inhomogeneity of Bulk-Heterojunction Active Layers and Improvements of Light-Harvesting and Power-Conversion Efficiency of Organic Solar Cells
    Organic Electronics 42, 372 (2017); DOI: 10.1016/j.orgel.2016.12.063
    S. Y. Joe, S Ryua, D. C. Nguyen, J. H. Yim, H. Jeong, N. Y. Ha, Y. H. Ahn, J. Y. Park, S. Lee*

  12. True nature of active layers in organic solar cells fabricated by sequential casting of donor and acceptor layers
    Physica Status Solidi (RRL) 11, 1600415 (2017); DOI: 10.1002/pssr.201600415
    J. Y. Yim, S. Y. Joe, D. C. Nguyen, S. Y. Ryu, N. Y. Ha, Y. H. Ahn, J. Y. Park, S. Lee*

  13. Hole-extraction layer dependence of defect formation and operation of planar CH3NH3PbI3 perovskite solar cells
    Physica Status Solidi (RRL) 11, 1600395 (2017); DOI: 10.1002/pssr.201600395
    D. C. Nguyen, S. Y. Joe, N. Y. Ha, H. J. Park, J. Y. Park, Y. H. Ahn, S. Lee*

  14. Crystallization Kinetics of Lead Halide Perovskite Film Monitored by In Situ Terahertz Spectroscopy
    J. Phys. Chem. Lett. 8, 401 (2017); DOI: 10.1021/acs.jpclett.6b02691
    S. J. Park, A. R. Kim, J. T. Hong, J. Y. Park, S. Lee, Y. H. Ahn*

2016

  1. Differential Transmission Spectra of Terahertz Metamaterial Resonances for Sensing Microorganisms
    Korean Journal of Optics and Photonics 27, 229 (2016); DOI: 10.3807/KJOP.2016.27.6.229
    S. J. Park, Y. H. Ahn* (*written in Korean)

  2. UV-induced terahertz wave modulation in freestanding ZnO nanowire films
    Opt. Mater. Express 6, 3751 (2016); DOI: 10.1364/OME.6.003751
    J. T. Hong, J. Y. Park, S. Lee, Y. H. Ahn*

  3. Enhanced Nucleation of High‑k Dielectrics on Graphene by Atomic Layer Deposition
    Chemistry of Materials 28,7268 (2016); DOI: 10.1021/acs.chemmater.6b02486
    Y. H. Park, M. H. Kim, S. B. Kim, H. J. Jung, K. Chae, Y. H. Ahn, J. Y. Park, F. Rotermund*, S. W. Lee*

  4. Effective Sensing Volume of Terahertz Metamaterial with Various Gap Widths
    Journal of the Optical Society of Korea 20, 628 (2016); DOI: 10.3807/JOSK.2016.20.5.628
    S. J. Park, S. A. N. Yoon, Y. H. Ahn*

  5. Control of device characteristics by passivation of graphene field effect transistors with polymers
    Curr. Appl. Phys. 16, 6851 (2015); DOI: 10.1016/j.cap.2016.08.022
    G. Jang, W. Yim, Y. H. Ahn, S. Lee, J. Y. Park*

  6. Observation of Charge Separation and Space-Charge Region in Single-Crystal P3HT/C60 Heterojunction Nanowires
    Angewandte Chemie 128, 1506 (2016); DOI: 10.1002/anie.201603961
    K. S. Park, K. S. Lee, J. Baek, L. Lee, B. H. Son, Y. Koo Lee, Y. H. Ahn, W. I. Park, Y. Kang, M. M. Sung*

  7. Dielectric constant measurements of thin films and liquids using terahertz metamaterials
    RSC Adv. 6, 69381 (2016); DOI: 10.1039/c6ra11777e
    S. J. Park, S. A. N. Yoon, Y. H. Ahn*

  8. Characterization of chemical doping of graphene by in-situ Raman Spectroscopy
    Applied Physics Letters 108, 203111 (2016); DOI: 10.1063/1.4950969
    S. J. Kim, S. J. Park, H. Y. Kim, G. S. Jang, D. J. Park, J.-Y. Park, S. Lee, Y. H. Ahn*

2015

  1. Electron Beam Induced Current on Carbon Nanotubes Measured through Substrate Electrodes
    J. Kor. Phys. Soc. 67, 1773 (2015); DOI: 10.3938%2Fjkps.67.1773
    J. K. Park, Y. H. Ahn*

  2. Terahertz-triggered phase transition and hysteresis narrowing in a nanoantenna patterned vanadium dioxide film
    Nano Lett. 15, 5893 (2015); DOI: 10.1021/acs.nanolett.5b01970
    Z. J. Thompson, A. Stickel, Y. G. Jeong, S. Han, B. H. Son, M. J. Paul, B. Lee, A. Mousavian, G. Seo, H. T. Kim, Y. S. Lee, D. S. Kim* (*PI not included)

  3. Terahertz metamaterial sensing on polystyrene microbeads: shape dependence
    Opt. Mater. Express  5, 2150 (2015); DOI: 10.1364/OME.5.002150
    S. J. Park, S. W. Jun, A. R. Kim, Y. H. Ahn*

  4. Suspended single-walled carbon nanotube fluidic sensors
    Nanoscale 7, 15421 (2015); DOI: 10.1039/C5NR03215F
    B. H. Son, J. Y. Park, S. Lee, Y. H. Ahn*

  5. Non-Contact Local Conductance Mapping of Individual Graphene Oxide Sheets during the Reduction Process
    J. Phys. Chem. Lett. 6, 2629 (2015); DOI: 10.1021/acs.jpclett.5b01008
    H. Jeong, K. M. Lee, Y. H. Ahn, S. Lee, J.-Y. Park*

  6. Active control of all-fiber graphene devices with electrical gating
    Nature Communications 6, 6851 (2015); DOI: 10.1038/ncomms7851
    E. J. Lee, S. Y. Choi, H. Jeong, N. H. Park, W. Yim, M. H. Kim, J.-K. Park, S. Son, S. Bae, S. J. Kim, Y. H. Ahn, K. J. Ahn, B. H. Hong, J.-Y.Park, F. Rotermund*, D.-I. Yeom*

  7. Universal Efficiency Improvement in Organic Solar Cells Based on a Poly(3-hexylthiophene) Donor and an Indene-C60 Bisadduct Acceptor with Additional Donor Nanowires
    ChemPhysChem 16, 1217 (2015); DOI: 10.1002/cphc.201402762
    S. Y. Joe, J. H. Yim, S. Y. Ryu, N. Y. Ha, Y. H. Ahn, J. Y. Park, S. Lee*

  8. Suppressing spontaneous polarization of p-GaN by graphene oxide passivation: Augmented light output of GaN UV-LED
    Scientific Reports 5, 7778 (2015), ; DOI: 10.1038/srep07778
    H. Jeong, S. Y. Jeong, D. J. Park, H. J. Jeong, S. Jeong, J. T. Han, H. J. Jeong, S. Yang, H. Y. Kim, K. J. Baeg, S. J. Park, Y. H. Ahn, E. K. Suh, G. W. Lee*, Y. H. Lee*, M. S. Jeong*

2014

  1. Sensitive detection of yeast using terahertz slot antennas
    Opt. Express 22, 30467 (2014); DOI: 10.1364/OE.22.030467
    S. J. Park, B. H. Son, S. J. Choi, H. S. Kim, Y. H. Ahn*

  2. Substrate Effects on Terahertz Metamaterial Resonances for Various Metal Thicknesses
    J. Korean Phys. Soc. 65, 1843 (2014); DOI: 10.3938/jkps.65.1843
    S. J. Park, Y. H. Ahn*

  3. Imaging surface charge distribution near carbon nanotube device in aqueous environments
    Appl. Phys. Lett. 105, 223101 (2014); DOI: 10.1063/1.4902401
    J. K. Park, B. H. Son, J. Y. Park, S. Lee, Y. H. Ahn*

  4. Correlating nucleation density with heating ramp rates in continuous graphene film formation
    Carbon 80, 708 (2014); DOI: 10.1016/j.carbon.2014.09.016
    D. H. Jung, C. Kang, B. H. Son, Y. H. Ahn, J. S. Lee*

  5. Imaging Ultrafast Carrier Transport in Nanoscale Field-Effect Transistors
    ACS Nano 8, 11361 (2014); DOI: 10.1021/nn5042619 SPIE newsroom
    B. H. Son, J. K. Park, J. T. Hong, J. Y. Park, S. Lee, Y. H. Ahn*

  6. Fully Solution-Processed Transparent Conducting Oxide-Free Counter Electrodes for Dye-Sensitized Solar Cells: Spray-Coated Single-Wall Carbon Nanotube Thin Films Loaded with Chemically- Reduced Platinum Nanoparticles
    ACS Appl. Mater. Interfaces 6, 13430 (2014); DOI: 10.1021/am5019447
    S. Y. Kim, Y. Kim, K. M. Lee, W. S. Yoon, H. S. Lee, J. T. Lee, S. J. Kim, Y. H. Ahn, T. K. Lee, S. Lee*

  7. Diffusion Length in Nanoporous TiO2 Films under Above-Band-Gap Illumination
    AIP Adv. 4, 067106 (2014); DOI: 10.1063/1.4881875
    J. D. Park, B. H. Son, J. K. Park, S. Y. Kim, J. Y. Park, S. Lee, Y. H. Ahn*

  8. Quantitative non-contact voltage profiling of quasi one-dimensional nanoelectronic devices
    Appl. Phys. Lett. 104, 213102 (2014); DOI: 10.1063/1.4880733
    H. Jeong, Y. H. Ahn, S. Lee, J. Y. Park*

  9. Detection of microorganisms using terahertz metamaterials
    Scientific Reports 4, 4988 (2014); DOI: 10.1038/srep04988
    S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, Y. H. Ahn*

  10. Charge Transport in Light Emitting Devices Based on Colloidal Quantum Dots and a Solution-Processed Nickel Oxide Layer
    ACS Appl. Mater. Interfaces 6, 7286 (2014); DOI: 10.1021/am500593a
    H. T. Nguyen, H. Jeong, J. Y. Park, Y. H. Ahn, S. Lee*

  11. Dielectric substrate effect on the metamaterial resonances in terahertz frequency range
    Curr. Appl. Phys. 14, 570 (2014); DOI: 10.1016/j.cap.2014.01.015
    D. J. Park, S. J. Park, I. Park, Y. H. Ahn*

  12. Fully Solution-Processed Semitransparent Organic Solar Cells with a Silver Nanowire Cathode and a Conducting Polymer Anode
    ACS Nano 3, 2857 (2014); DOI: 10.1021/nn406672n
    J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J. Y. Park, Y. H. Ahn, J. C. de Mello*, S. Lee*

2013

  1. Dielectric Constant Engineering of Single-Walled Carbon Nanotube Films for Metamaterials and Plasmonic Devices
    J. Phys. Chem. Lett. 4, 3950 (2013); DOI: 10.1021/jz4020053
    J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J. Y. Park, S. Lee, Y. H. Ahn*

  2. High-speed scanning photocurrent imaging techniques on nanoscale devices
    Curr. Appl. Phys. 13, 2076 (2013); DOI: 10.1016/j.cap.2013.08.019
    J. K. Park, B. H. Son, J. Y. Park, S. Lee, Y. H. Ahn*

  3. Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates
    Curr. Appl. Phys. 13, 753 (2013); DOI: 10.1016/j.cap.2012.11.018
    D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermunda, S. Lee, K. J. Ahn, D. S. Kim, Y. H. Ahn*

  4. Terahertz conductivity of reduced graphene oxide films
    Opt. Express 21, 7633 (2013); DOI: 10.1364/OE.21.007633
    J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J. Y. Park, S. Lee, and Y. H. Ahn*

2012

  1. Diffusion Length in Nanoporous Photoelectrodes of Dye-Sensitized Solar Cells under Operating Conditions Measured by Photocurrent Microscopy
    J. Phys. Chem. Lett. 3, 3632 (2012); DOI: 10.1021/jz301751j
    J.-K. Park, J.-C. Kang, S. Y. Kim, B. H. Son, J.-Y. Park, S. Lee, and Y. H. Ahn*

  2. Transfer-Printing of As-Fabricated Carbon Nanotube Devices onto Various Substrates
    Adv. Mater. 24 4499 (2012); DOI: 10.1002/adma.201201794
    Q. N. Thanh, H. Jeong, J. Kim, J. W. Kevek, Y. H. Ahn, S. Lee, E. D. Minot, J. Y. Park*

  3. Effects of humidity on the electrical characteristics of ZnO nanowire devices
    Physica Status Solidi A 209, 972 (2012); DOI: 10.1002/pssa.201127460
    J. Kim, H. S. Jeong, Y. H. Ahn, S. Lee, J.-Y. Park*

  4. Low temperature cathodoluminecence and electron beam induced current studies of single GaN nanowires
    Appl. Phys. Lett. 100, 153110 (2012); DOI: 10.1063/1.3702797
    E. Oh*, B. W. Lee, S. J. Shim, H. J. Choi, B. H. Son, Y. H. Ahn, L. S. Dang

  5. Efficient mode-locking of sub–70 fs Ti:sapphire laser by graphene saturable absorber
    Appl. Phys. Express 5, 032701 (2012);DOI: 10.1143/APEX.5.032701
    I. H. Baek, H. W. Lee, S. Bae, B. H. Hong, Y. H. Ahn, D. I. Yeom, F. Rotermund*

  6. Synthesis of vertical arrays of ultra long ZnO nanowires on noncrystalline substrates
    Mater. Sci. Eng. B 177, 132 (2012); DOI: 10.1016/j.mseb.2011.10.020
    B. J. Kwon, K. M. Lee, H. Y. Shin, J. Kim, J. Liu, S. Yoon, S. Lee, Y. H. Ahn, J. Y. Park*

  7. Terahertz Wave Applications of Single-Walled Carbon Nanotube Films with High Shielding Effectiveness
    Appl. Phys. Express 5, 015102 (2012)
    J. T. Hong, D. J. Park, J. Y. Moon, S. B. Choi, J. K. Park, F. Rotermund, J. Y. Park, S. Lee, Y. H. Ahn*

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