Jae Su Yu

Summary

Affiliation: Kyung Hee University
Country: Korea

Publications

  1. ncbi request reprint Pechini synthesis of lanthanide (Eu(3+)/Tb(3+)or Dy(3+)) ions activated BaGd2O4 nanostructured phosphors: an approach for tunable emissions
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Phys Chem Chem Phys 16:18124-40. 2014
  2. ncbi request reprint Cross-relaxation induced tunable emissions from the Tm(3+)/Er(3+)/Eu(3+) ions activated BaGd2O4 nanoneedles
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Dalton Trans 43:9766-76. 2014
  3. doi request reprint Imaging and curcumin delivery in pancreatic cancer cell lines using PEGylated α-Gd2(MoO4)3 mesoporous particles
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Dalton Trans 43:3330-8. 2014
  4. ncbi request reprint Biomimetic artificial Si compound eye surface structures with broadband and wide-angle antireflection properties for Si-based optoelectronic applications
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanoscale 5:10455-60. 2013
  5. pmc Electrochemical synthesis of ZnO branched submicrorods on carbon fibers and their feasibility for environmental applications
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, Yongin 446 701, South Korea
    Nanoscale Res Lett 8:262. 2013
  6. doi request reprint Light-extraction enhancement and directional emission control of GaN-based LEDs by self-assembled monolayer of silica spheres
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, South Korea
    Opt Express 20:25058-63. 2012
  7. pmc Well-integrated ZnO nanorod arrays on conductive textiles by electrochemical synthesis and their physical properties
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do, 446 701, Republic of Korea
    Nanoscale Res Lett 8:28. 2013
  8. pmc Improved light extraction of InGaN/GaN blue LEDs by GaOOH NRAs using a thin ATO seed layer
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanoscale Res Lett 7:458. 2012
  9. pmc Structural and optical properties of ZnO nanorods by electrochemical growth using multi-walled carbon nanotube-composed seed layers
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do, 446 701, South Korea
    Nanoscale Res Lett 7:13. 2012
  10. ncbi request reprint Fabrication and optical property of vertically-aligned ZnO/Si double nanostructures
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 12:4570-6. 2012

Collaborators

  • Young Min Song
  • Jung Woo Leem
  • Yeong Hwan Ko
  • G Seeta Rama Raju
  • Hee Kwan Lee
  • E Pavitra
  • Myung Sub Kim
  • Dong Hyuk Joo
  • Soo Hyun Lee
  • Goli Nagaraju
  • Bassel F El-Rayes
  • Ganji Purnachandra Nagaraju
  • Kandimalla Ramesh
  • Wook Park
  • Dandu Kamakshigari Venkata Ramana
  • Yunhae Yeh
  • Kwan Soo Chung
  • Ganji Seeta Rama Raju

Detail Information

Publications32

  1. ncbi request reprint Pechini synthesis of lanthanide (Eu(3+)/Tb(3+)or Dy(3+)) ions activated BaGd2O4 nanostructured phosphors: an approach for tunable emissions
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Phys Chem Chem Phys 16:18124-40. 2014
    ..The calculated Commission International de l'Eclairage chromaticity coordinates of individual ion doped BG phosphors confirmed red, green, and white emissions and for co-doped samples they showed tunable emission. ..
  2. ncbi request reprint Cross-relaxation induced tunable emissions from the Tm(3+)/Er(3+)/Eu(3+) ions activated BaGd2O4 nanoneedles
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Dalton Trans 43:9766-76. 2014
    ..From the PL and CL investigations, the white-light emission was realized from the single-phase BG:Tm(3+)/Er(3+)/Eu(3+) phosphor under NUV and low voltage electron beam excitations. ..
  3. doi request reprint Imaging and curcumin delivery in pancreatic cancer cell lines using PEGylated α-Gd2(MoO4)3 mesoporous particles
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Dalton Trans 43:3330-8. 2014
    ..Consequently, these mesoporous particles are an effective method for drug delivery that can cross the biological barriers of the body targeting the cellular nucleoplasm. ..
  4. ncbi request reprint Biomimetic artificial Si compound eye surface structures with broadband and wide-angle antireflection properties for Si-based optoelectronic applications
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanoscale 5:10455-60. 2013
    ..3% and RSWR < 3.7% in the wavelength region of 300-1100 nm even at a high incident light angle of 70° in the specular reflectance...
  5. pmc Electrochemical synthesis of ZnO branched submicrorods on carbon fibers and their feasibility for environmental applications
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, Yongin 446 701, South Korea
    Nanoscale Res Lett 8:262. 2013
    ..07 mg g-1, which could be practically used in Pb(II) removal from water. These fabricated ZOCFs are potentially useful for multifunctional and environmental devices. ..
  6. doi request reprint Light-extraction enhancement and directional emission control of GaN-based LEDs by self-assembled monolayer of silica spheres
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, South Korea
    Opt Express 20:25058-63. 2012
    ..23 times under the injection currents of 100 and 350 mA, respectively. By employing the SAM of HCP silica spheres, the directional emission pattern was relatively converged, indicating a reasonable consistency with the simulation result...
  7. pmc Well-integrated ZnO nanorod arrays on conductive textiles by electrochemical synthesis and their physical properties
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do, 446 701, Republic of Korea
    Nanoscale Res Lett 8:28. 2013
    ..At an external cathodic voltage of -2 V, the photoluminescence property of ZnO NRAs was optimized with good crystallinity and high density...
  8. pmc Improved light extraction of InGaN/GaN blue LEDs by GaOOH NRAs using a thin ATO seed layer
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanoscale Res Lett 7:458. 2012
    ..For LEDs with GaOOH NRAs grown at -2 V, the light output power was increased by 22% without suffering from any serious electrical degradation and wavelength shift as compared with conventional LEDs...
  9. pmc Structural and optical properties of ZnO nanorods by electrochemical growth using multi-walled carbon nanotube-composed seed layers
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do, 446 701, South Korea
    Nanoscale Res Lett 7:13. 2012
    ..The effect of the MWCNT-composed seed layer on the surface wettability was also investigated.PACS: 81.07.-b; 81.16.-c; 81.07.Pr; 61.48.De...
  10. ncbi request reprint Fabrication and optical property of vertically-aligned ZnO/Si double nanostructures
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 12:4570-6. 2012
    ..05% compared to 11.71% in the ZnO NRAs on the flat Si substrate. Also, the enhanced antireflection property of ZnO/Si double nanostructures was theoretically analyzed by performing the rigorous coupled wave analysis simulation...
  11. doi request reprint Wafer-scale highly-transparent and superhydrophilic sapphires for high-performance optics
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, Giheung gu, Yongin si, Gyeonggi Do, South Korea
    Opt Express 20:26160-6. 2012
    ..The SWSs enhanced significantly the surface hydrophilicity of sapphires, exhibiting a water contact angle (θ(c)) of < 5° for Au film of 5 nm compared to θ(c)~37° of the flat sapphire...
  12. doi request reprint Urchin-aggregation inspired closely-packed hierarchical ZnO nanostructures for efficient light scattering
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, Giheung gu, Yongin, South Korea
    Opt Express 19:25935-43. 2011
    ..The contact angles of a water droplet on the surface of the samples were also explored...
  13. doi request reprint Broadband antireflective germanium surfaces based on subwavelength structures for photovoltaic cell applications
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, Giheung gu, Yongin si, Gyeonggi Do, South Korea
    Opt Express 19:26308-17. 2011
    ..8% at a wavelength of 633 nm in the incident angle range of 15-85°. The measured reflectance data of Ge SWSs showed similar trends to the calculated results in a rigorous coupled wave analysis simulation...
  14. doi request reprint Broadband and wide-angle distributed Bragg reflectors based on amorphous germanium films by glancing angle deposition
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, South Korea
    Opt Express 20:20576-81. 2012
    ..9%, maintaining R values of > 85%. The a-Ge DBR with good uniformity was obtained over the area of a 2 inch Si wafer. The calculated reflectance results showed a similar tendency to the measured data...
  15. doi request reprint Facile template free synthesis of Gd2O(CO3)2·H2O chrysanthemum-like nanoflowers and luminescence properties of corresponding Gd2O3:RE3+ spheres
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, Giheung gu, Yongin si, Gyeonggi Do, Republic of Korea
    Dalton Trans 42:11400-10. 2013
    ..The CIE chromaticity coordinates were also calculated from the PL and CL spectra of RE(3+) ions to establish their color richness. ..
  16. ncbi request reprint Luminescence properties of europium ions-doped yttrium silicate (Y2SiO5:Eu3+) nanocrystalline phosphors: effect of Eu3+ ion concentration and thermal annealing
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 13:3230-5. 2013
    ..For the optimized Y2SiO5:Eu3+ nanocrystalline phosphors, the lifetimes were also estimated from the decay curves under the ultraviolet excitations...
  17. ncbi request reprint Bioinspired periodic pinecone-shaped Si subwavelength nanostructures for broadband and omnidirectional antireflective surface
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, South Korea
    J Nanosci Nanotechnol 12:7932-8. 2012
    ..9% at a wavelength of 550 nm up to a high incident angle of theta(i) = 70 degrees for non-polarized light. This structure also showed a hydrophobic surface with a water contact angle of theta(c) approximately 102 degrees...
  18. ncbi request reprint PDMS-based triboelectric and transparent nanogenerators with ZnO nanorod arrays
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    ACS Appl Mater Interfaces 6:6631-7. 2014
    ..Under different external forces of 0.3-10 kgf, the output voltage and current were also characterized. ..
  19. ncbi request reprint A novel strategy for controllable emissions from Eu3+ or Sm3+ ions co-doped SrY2O4:Tb3+ phosphors
    E Pavitra
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Phys Chem Chem Phys 14:11296-307. 2012
    ..The calculated CIE chromaticity coordinates of RE ions activated SrY(2)O(4) phosphors confirmed the red, green, orange and white emissions...
  20. ncbi request reprint Effect of AZO seed layer on electrochemical growth and optical properties of ZnO nanorod arrays on ITO glass
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Kyung Hee University, Yongin si, Gyeonggi Do, Korea
    Nanotechnology 22:445602. 2011
    ....
  21. doi request reprint Broadband wide-angle antireflection enhancement in AZO/Si shell/core subwavelength grating structures with hydrophobic surface for Si-based solar cells
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do, Korea
    Opt Express 19:A1155-64. 2011
    ..8%, maintaining a reflectance of < 9.2% at wavelengths of 300-2100 nm up to the incident angle of θ(i) = 70°. The effective electrical properties of AZO films in AZO/Si shell/core SWGs were also analyzed...
  22. ncbi request reprint Six-fold hexagonal symmetric nanostructures with various periodic shapes on GaAs substrates for efficient antireflection and hydrophobic properties
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanotechnology 22:485304. 2011
    ..2% over a wide wavelength region of 350-1800 nm and a hydrophobic surface with a water contact angle of θ(c) ∼ 115°. The calculated reflectances were reasonably consistent with the measured results...
  23. ncbi request reprint Antireflective hydrophobic si subwavelength structures using thermally dewetted Ni/SiO2 nanomask patterns
    Dong Hyuk Joo
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 11:10130-5. 2011
    ..The water contact angle of 110 degrees is obtained, indicating a hydrophobic surface. The calculated reflectance results are also reasonably consistent with the experimental data...
  24. doi request reprint Novel orange and reddish-orange color emitting BaGd2O4:Sm3+ nanophosphors by solvothermal reaction for LED and FED applications
    G Seeta Rama Raju
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Spectrochim Acta A Mol Biomol Spectrosc 124:383-8. 2014
    ..The Commission International De I-Eclairage chromaticity coordinates of BG:Sm(3+) nanophosphors were found to be very close to the chromaticity coordinates of Nichia Corporation developed amber light-emitting diodes...
  25. doi request reprint Multi-functional antireflective surface-relief structures based on nanoscale porous germanium with graded refractive index profiles
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    Nanoscale 5:2520-6. 2013
    ..The angle-dependent reflectance characteristics were also studied at incident angles of 15-85° for s- and p-polarized lights at a wavelength of 1.33 μm. The calculated results showed similar trends to the experimental data...
  26. doi request reprint Glancing angle deposited ITO films for efficiency enhancement of a-Si:H/μc-Si:H tandem thin film solar cells
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Korea
    Opt Express 19:A258-68. 2011
    ..6% is obtained from simulation under AM1.5g illumination, indicating an efficiency improvement compared to the device with the 0° ITO/0° ITO bi-layer structure (i.e. η = 12.58%)...
  27. ncbi request reprint Controllable synthesis of periodic flower-like ZnO nanostructures on Si subwavelength grating structures
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, Yongin 446 701, Korea
    Nanotechnology 22:205604. 2011
    ..For a three-dimensional (3D) flower-like ZnO NS on Si SWGs, a relatively low total reflectance of < 8% at wavelengths of 300-1050 nm is achieved compared to the ZnO NRs on Si substrate...
  28. ncbi request reprint Broadband optical absorption enhancement in Au-coated ZnO nanotips
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 11:6912-8. 2011
    ....
  29. ncbi request reprint Growth parameter dependent structural and optical properties of ZnO nanostructures on Si substrate by a two-zone thermal CVD
    Hee Kwan Lee
    Department of Electronics and Radio Engineering, Institute for Laser Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, Republic of Korea
    J Nanosci Nanotechnol 12:3123-9. 2012
    ..9. For various growth parameters, the photoluminescence emission was slightly shifted with the ultraviolet emission related to the near band edge transition...
  30. doi request reprint Highly transparent sapphire micro-grating structures with large diffuse light scattering
    Yeong Hwan Ko
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin 446 701, Republic of Korea
    Opt Express 19:15574-83. 2011
    ..The experimental data were in a reasonable agreement with the theoretical results...
  31. ncbi request reprint Indium tin oxide subwavelength nanostructures with surface antireflection and superhydrophilicity for high-efficiency Si-based thin film solar cells
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, Giheung gu, Yongin si, Gyeonggi Do, South Korea
    Opt Express 20:A431-40. 2012
    ..7% was theoretically obtained under AM1.5g illumination, indicating an increased efficiency by 1.4% compared to the device with the conventional ITO film (i.e., η = 12.3%)...
  32. ncbi request reprint Enhanced transmittance and hydrophilicity of nanostructured glass substrates with antireflective properties using disordered gold nanopatterns
    Jung Woo Leem
    Department of Electronics and Radio Engineering, Kyung Hee University, 1 Seocheon Dong, Giheung gu, Yongin si, Gyeonggi Do 446 701, South Korea
    Opt Express 20:4056-66. 2012
    ..e., Tave~92.7%, SWT~92.7%, and θc~65°). The calculated total transmittance results showed a similar tendency to the experimental results...