All Stories

  1. Revolutionizing red micro-LEDs: Harnessing surface plasmons for enhanced efficiency

    Article • Applied Physics Reviews, November 2025, American Institute of Physics

    Dr Periyayya Uthirakumar

  2. Introducing Cu2O (111) phase on Cu(OH)2 nanorods integrated Pd-cocatalyst for boosting acetone selectivity via photoelectrochemical CO2RR

    Article • Environmental Research, January 2025, Elsevier

    Dr Periyayya Uthirakumar

  3. Integration of InGaN/GaN Microrod Light Emitting Diodes on Flexible and Peelable Substrate via Dielectrophoretic Alignments

    Article • ACS Photonics, December 2024, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  4. Exploring the Influence of Localized Surface Plasmon and Sol–Gel Passivation on Blue InGaN/GaN Micro/Nano Light Emitting Diodes

    Article • ACS Photonics, December 2024, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  5. Sputtering induced the architecture of “needle mushroom” shaped Cu2O–NiCo2O4 heterostructure with novel morphology and abundant interface for high-efficiency electrochemical water oxidation

    Article • The Journal of Chemical Physics, November 2024, American Institute of Physics

    Dr Periyayya Uthirakumar

  6. Enhanced horizontal alignment of InGaN/GaN nanorod LEDs via insulator-based dielectrophoresis

    Article • Optical Materials, November 2024, Elsevier

    Dr Periyayya Uthirakumar

  7. Fabrication of Vertically Aligned InGaN/GaN Nanorod Light Emitting Diode Arrays Using Dielectrophoresis

    Article • ACS Applied Materials & Interfaces, October 2024, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  8. Designing a Novel C3‐Fe‐N Interface Local Coordination Microenvironment for Efficient Electrocatalytic Water Splitting

    Article • Small, September 2024, Wiley

    Dr Periyayya Uthirakumar

  9. Enhanced quantum efficiency of horizontally aligned individual InGaN/GaN nanorod LEDs by self-assembled Ag nanoparticles

    Article • Applied Surface Science, May 2024, Elsevier

    Dr Periyayya Uthirakumar

  10. Accelerating photoelectrochemical CO2RR selectively of C2+ products by integrating Ag/Pd cocatalysts on Cu/Cu2O/CuO heterojunction nanorods

    Article • Journal of Environmental Chemical Engineering, April 2024, Elsevier

    Dr Periyayya Uthirakumar

  11. LaCeOx coupled N-doped graphene/Ru single-atoms as a binary-site catalyst for efficient hydrogen evolution based on hydrogen spillover

    Article • Applied Catalysis B Environment and Energy, April 2024, Elsevier

    Dr Periyayya Uthirakumar

  12. Pt Single Atoms Supported on Defect Ceria as an Active and Stable Dual-Site Catalyst for Alkaline Hydrogen Evolution

    Article • Nano Letters, January 2024, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  13. Enabling Localized Surface Plasmon Emission from InGaN/GaN Nano-LEDs Integrated with Ag/SiO2 Nanoparticles

    Article • ACS Photonics, January 2024, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  14. Binder-free Cu/Cu2O/CuO/Pd nanorods photoelectrode for regulating the faradaic efficiency for acetaldehyde and acetate production during photoelectrochemical CO2RR by stabilizing the Cu2O phase

    Article • Journal of Environmental Chemical Engineering, December 2023, Elsevier

    Dr Periyayya Uthirakumar

  15. Platinum single-atom catalysts anchored on a heterostructure cupric oxide/copper foam for accelerating photoelectrochemical hydrogen evolution reaction

    Article • Nano Energy, December 2023, Elsevier

    Dr Periyayya Uthirakumar

  16. Investigation of non-stoichiometric delafossite photoelectrodes composed of cuprous oxide and iron oxide for enhanced water-splitting

    Article • Journal of Alloys and Compounds, July 2023, Elsevier

    Dr Periyayya Uthirakumar

  17. Facile synthesis of flexible and scalable Cu/Cu2O/CuO nanoleaves photoelectrodes with oxidation-induced self-initiated charge-transporting platform for photoelectrochemical water splitting enhancement

    Article • Journal of Alloys and Compounds, May 2023, Elsevier

    Dr Periyayya Uthirakumar

  18. Impact of porosity on the structural and optoelectronic properties of nanoporous GaN double layer fabricated via combined electrochemical and photoelectrochemical etching

    Article • Applied Surface Science, August 2022, Elsevier

    Dr Periyayya Uthirakumar

  19. Impact of Porosity on the Structural and Optoelectronic Properties of Nanoporous Gan Double Layer Fabricated Via Combined Electrochemical and Photo-Electrochemical Etching

    Article • SSRN Electronic Journal, January 2022, Elsevier

    Dr Periyayya Uthirakumar

  20. Enhancement in photostability of betalain dye from basella Alba fruits using zinc oxide nanoparticles

    Article • Materials Today Proceedings, January 2022, Elsevier

    Dr Periyayya Uthirakumar

  21. Scalable Cu/Cu2O-CuO/CuI heterojunction platform realizing an extended charge carrier separation suitable for photoreduction and photodegradation

    Article • Journal of Environmental Chemical Engineering, December 2021, Elsevier

    Dr Periyayya Uthirakumar

  22. Insightful understanding of hot-carrier generation and transfer in plasmonic Au@CeO2 core–shell photocatalysts for light-driven hydrogen evolution improvement

    Article • Applied Catalysis B Environment and Energy, June 2021, Elsevier

    Dr Periyayya Uthirakumar

  23. SURFACTANT-FREE SYNTHESIS OF CARBON QUANTUM DOTS ADORNED COPPER OXIDE NANOCOMPOSITES AND THEIR PHOTOCATALYTIC ACTIVITY OF COMMERCIAL DYES BENEATH SUNLIGHT AND UV LIGHT SOURCES

    Article • Environmental Nanotechnology Monitoring & Management, May 2021, Elsevier

    Dr Periyayya Uthirakumar

  24. The degradation profile of high molecular weight textile reactive dyes: A daylight induced photocatalytic activity of ZnO/carbon quantum dot photocatalyst

    Article • Environmental Nanotechnology Monitoring & Management, May 2021, Elsevier

    Dr Periyayya Uthirakumar

  25. Influence of Ga-halogen bond formation at the interface of nanoporous GaN photoelectrodes for enhanced photoelectrochemical water splitting efficiency

    Article • Applied Surface Science, May 2021, Elsevier

    Dr Periyayya Uthirakumar

  26. Efficient, recyclable, and affordable daylight induced Cu/Cu2O/CuI photocatalyst via an inexpensive iodine sublimation process

    Article • Applied Surface Science, January 2021, Elsevier

    Dr Periyayya Uthirakumar

  27. Impact of chloride surface treatment on nano-porous GaN structure for enhanced water-splitting efficiency

    Article • Applied Surface Science, December 2020, Elsevier

    Dr Periyayya Uthirakumar

  28. Fabrication of flexible sheets of Cu/CuO/Cu2O heterojunction nanodisks: A dominant performance of multiple photocatalytic sheets under natural sunlight

    Article • Materials Science and Engineering B, October 2020, Elsevier

    Dr Periyayya Uthirakumar

  29. Developing eco-friendly nanostructured oil: Partial discharge and breakdown voltage characterization of transformer corn oil

    Article • IEEE Transactions on Dielectrics and Electrical Insulation, October 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Periyayya Uthirakumar

  30. Enhanced cyclic performance initiated via an in situ transformation of Cu/CuO nanodisk to Cu/CuO/Cu2O nanosponge

    Article • Environmental Science and Pollution Research, September 2020, Springer Science + Business Media

    Dr Periyayya Uthirakumar

  31. A Contribution to Environmentally-Compatible Energy Conversion: Characterization of Nano Structured Natural Ester Oil Decorated with Carbon Quantum Dots

    Article • Journal of Electrical Engineering and Technology, August 2020, Springer Science + Business Media

    Dr Periyayya Uthirakumar

  32. Pd supported N-doped CeO2 as an efficient hydrogen oxidation reaction catalyst in PEMFC

    Article • New Journal of Chemistry, January 2020, Royal Society of Chemistry

    Dr Periyayya Uthirakumar

  33. Sodium hydroxide mediated alumina nanoparticles from waste aluminum foil sheets – Biological impact and photo-catalytic efficacy on commercial dyes

    Article • Materials Today Proceedings, January 2020, Elsevier

    Dr Periyayya Uthirakumar

  34. Fabrication of ultra-sensitive piperidine chemical sensor with a direct grown well-aligned ZnO nanorods on FTO substrate as a working electrode

    Article • Solid State Sciences, November 2019, Elsevier

    Dr Periyayya Uthirakumar

  35. Investigations on Novel Carbon Quantum Dots Covered Nanofluid Insulation for Medium Voltage Applications

    Article • Journal of Electrical Engineering and Technology, October 2019, Springer Science + Business Media

    Dr Periyayya Uthirakumar

  36. Reprecipitation induced isolation of ligand-free Cs4PbBr6 nanodisks as a green emissive UV light filter

    Article • Progress in Organic Coatings, July 2019, Elsevier

    Dr Periyayya Uthirakumar

  37. Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector

    Article • Materials Research Bulletin, July 2019, Elsevier

    Dr Periyayya Uthirakumar

  38. Synthesis of thermally stable and highly luminescent spherical shaped ligand-free Cs4PbBr6 nanospheres with a single polar solvent

    Article • Journal of Luminescence, May 2019, Elsevier

    Dr Periyayya Uthirakumar

  39. Role of carbon quantum dots and film thickness on enhanced UV shielding capability of flexible polymer film containing carbon quantum dots/N-doped ZnO nanoparticles

    Article • Optical Materials, October 2018, Elsevier

    Dr Periyayya Uthirakumar

  40. Influence of Bicationic and Catanionic Surfactants Over the Morphology of Mesoporous Nanohydroxyapatite

    Article • Journal of Nanoscience and Nanotechnology, October 2018, American Scientific Publishers

    Dr Periyayya Uthirakumar

  41. A convenient method for isolating carbon quantum dots in high yield as an alternative to the dialysis process and the fabrication of a full-band UV blocking polymer film

    Article • New Journal of Chemistry, January 2018, Royal Society of Chemistry

    Dr Periyayya Uthirakumar

  42. Carbon quantum dots decorated N-doped ZnO: Synthesis and enhanced photocatalytic activity on UV, visible and daylight sources with suppressed photocorrosion

    Article • Journal of Environmental Chemical Engineering, March 2016, Elsevier

    Dr Periyayya Uthirakumar

  43. Enhanced photocatalytic behaviour of synthesized nickel oxide nanoparticles on Fluorescein under different irradiations

    Article • Optik, March 2016, Elsevier

    Dr Periyayya Uthirakumar

  44. Localized surface plasmon enhanced photoluminescence of ZnO nanosheets by Au nanoparticles

    Article • Materials Letters, January 2016, Elsevier

    Dr Periyayya Uthirakumar

  45. Surfactant-free synthesis of leaf-like hierarchical CuO nanosheets as a UV light filter

    Article • Materials Letters, October 2015, Elsevier

    Dr Periyayya Uthirakumar

  46. Highly efficient degradation of dyes by carbon quantum dots/N-doped zinc oxide (CQD/N-ZnO) photocatalyst and its compatibility on three different commercial dyes under daylight

    Article • Journal of Colloid and Interface Science, October 2015, Elsevier

    Dr Periyayya Uthirakumar

  47. Facile synthesis of ZnO nanoglobules and its photocatalytic activity in the degradation of methyl orange dye under UV irradiation

    Article • Materials Letters, August 2015, Elsevier

    Dr Periyayya Uthirakumar

  48. Improved daylight-induced photocatalytic performance and suppressed photocorrosion of N-doped ZnO decorated with carbon quantum dots

    Article • RSC Advances, January 2015, Royal Society of Chemistry

    Dr Periyayya Uthirakumar

  49. Carbon quantum dots decorated leaf-like CuO nanosheets and their improved dispersion for an excellent UV-shielding properties in polymer films

    Article • RSC Advances, January 2015, Royal Society of Chemistry

    Dr Periyayya Uthirakumar

  50. Organic Solvent Assisted Growth of Flower-like ZnO for Enhanced Photocatalytic Activities

    Article • Current Nanoscience, May 2013, Bentham Science Publishers

    Dr Periyayya Uthirakumar

  51. Natural Light Source Assisted Synthesis of Self-decorated Ag/TiO2 Nanoparticles for Enhanced Photocatalytic Degradation of Fluorescein Dye

    Article • Current Nanoscience, November 2012, Bentham Science Publishers

    Dr Periyayya Uthirakumar

  52. Beam Divergence and Thermal Transient Characteristics of InGaN/GaN Light Emitting Diodes with Rear Side Grown ZnO Nanorods

    Article • Japanese Journal of Applied Physics, October 2012, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  53. Beam Divergence and Thermal Transient Characteristics of InGaN/GaN Light Emitting Diodes with Rear Side Grown ZnO Nanorods

    Article • Japanese Journal of Applied Physics, September 2012, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  54. Coalescence driven size-controlled synthesis of ITO nanospheres

    Article • Applied Surface Science, September 2012, Elsevier

    Dr Periyayya Uthirakumar

  55. Impact of Nano-Texturing in GaN-based Light Emitting Diodes by Self-Assembled Silver Microspheres as Etch Mask

    Article • Current Nanoscience, December 2011, Bentham Science Publishers

    Dr Periyayya Uthirakumar

  56. Fabrication of ZnO Based Dye Sensitized Solar Cells

    Article • November 2011, IntechOpen

    Dr Periyayya Uthirakumar

  57. Synthesis and improved luminescence properties of OLED/ZnO hybrid materials

    Article • Vacuum, October 2011, Elsevier

    Dr Periyayya Uthirakumar

  58. Enhancement of light output power in GaN-based light-emitting diodes using indium tin oxide films with nanoporous structures

    Article • Thin Solid Films, October 2011, Elsevier

    Dr Periyayya Uthirakumar

  59. The different types of ZnO materials on the performance of dye-sensitized solar cells

    Article • Physica E Low-dimensional Systems and Nanostructures, July 2011, Elsevier

    Dr Periyayya Uthirakumar

  60. Enhanced light output power of GaN-based light-emitting diodes by nano-rough indium tin oxide film using ZnO nanoparticles

    Article • Journal of Applied Physics, May 2011, American Institute of Physics

    Dr Periyayya Uthirakumar

  61. Light Output Power Enhancement of GaN-Based Light Emitting Diodes with Periodic Deflector Embedded on the Wet Etch Patterned Sapphire Substrate

    Article • Japanese Journal of Applied Physics, April 2011, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  62. Light Output Power Enhancement of GaN-Based Light Emitting Diodes with Periodic Deflector Embedded on the Wet Etch Patterned Sapphire Substrate

    Article • Japanese Journal of Applied Physics, April 2011, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  63. Tuning the spectrometric properties of white light by surface plasmon effect using Ag nanoparticles in a colour converting light-emitting diode

    Article • Solid-State Electronics, March 2011, Elsevier

    Dr Periyayya Uthirakumar

  64. Comparison of various surface textured layer in InGaN LEDs for high light extraction efficiency

    Article • Optics Express, February 2011, Optical Society of America (OSA)

    Dr Periyayya Uthirakumar

  65. Improved light extraction efficiency of GaN-based light emitting diodes using one and two interfaces of ITO/ZnO layer texturing

    Article • Materials Science in Semiconductor Processing, December 2010, Elsevier

    Dr Periyayya Uthirakumar

  66. Enhancement of Light Output Power and Modification of Beam Profile in InGaN/GaN Light Emitting Diodes with Micro Polygon Column Shaped Transparent

    Article • Japanese Journal of Applied Physics, November 2010, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  67. Synthesis and characterization of porous shell-like nano hydroxyapatite using Cetrimide as template

    Article • Journal of Colloid and Interface Science, October 2010, Elsevier

    Dr Periyayya Uthirakumar

  68. Enhanced air-cavity effect of periodically oriented embedded air protrusions for high-efficiency InGaN/GaN light-emitting diodes

    Article • Optics Letters, August 2010, Optical Society of America (OSA)

    Professor Mun Seok Jeong, Dr Periyayya Uthirakumar

  69. Impact of layer thickness and light transmission of ZnO nanomaterials on GaN-based light emitting diodes

    Article • Vacuum, August 2010, Elsevier

    Dr Periyayya Uthirakumar

  70. Effect of Ridge Growth on Wafer Bowing and Light Extraction Efficiency of Vertical GaN-Based Light-Emitting Diodes

    Article • Japanese Journal of Applied Physics, July 2010, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  71. Enhanced light output power of GaN-based light emitting diodes with overcut sideholes formed by wet etching

    Article • Solid-State Electronics, May 2010, Elsevier

    Dr Periyayya Uthirakumar

  72. Nanoscale ITO/ZnO layer-texturing for high-efficiency InGaN/GaN light emitting diodes

    Article • Materials Science and Engineering B, February 2010, Elsevier

    Dr Periyayya Uthirakumar

  73. Enhancement of Light Output Power in InGaN/GaN LEDs with Nanoroughed Hemispherical Indium Tin Oxide Transparent Ohmic Contacts

    Article • Electrochemical and Solid-State Letters, January 2010, The Electrochemical Society

    Dr Periyayya Uthirakumar

  74. Enhanced Light Output Power of InGaN/GaN Light Emitting Diodes with Embedded Air Prisms

    Article • Electrochemical and Solid-State Letters, January 2010, The Electrochemical Society

    Dr Periyayya Uthirakumar

  75. Zinc oxide nanostructures derived from a simple solution method for solar cells and LEDs

    Article • Chemical Engineering Journal, December 2009, Elsevier

    Dr Periyayya Uthirakumar

  76. Impact of two-floor air prism arrays as an embedded reflector for enhancing the output power of InGaN/GaN light emitting diodes

    Article • Applied Physics Letters, November 2009, American Institute of Physics

    Dr Periyayya Uthirakumar

  77. Effect of annealing temperature and pH on morphology and optical property of highly dispersible ZnO nanoparticles

    Article • Materials Characterization, November 2009, Elsevier

    Dr Periyayya Uthirakumar

  78. Improvement of Light Output Power in InGaN/GaN Light-Emitting Diodes with a Nanotextured GaN Surface Using Indium Tin Oxide Nanospheres

    Article • Japanese Journal of Applied Physics, October 2009, Japan Society of Applied Physics

    Dr Periyayya Uthirakumar

  79. Synthesis and characterization of nano spherical hydroxyapatite for drug delivery and tissue engineering

    Article • August 2009, SPIE

    Dr Periyayya Uthirakumar

  80. A Catalyst-free Approach to Prepare Nano to Microstructures of GaN from a Single Molecular Complex Precursor

    Article • Journal of the Korean Physical Society, July 2009, Korean Physical Society

    Dr Periyayya Uthirakumar

  81. Polymer solar cells based on inkjet-printed PEDOT:PSS layer

    Article • Organic Electronics, May 2009, Elsevier

    Dr Periyayya Uthirakumar

  82. Fabrication and electro chemical properties of poly vinyl alcohol/para toluene sulfonic acid membranes for the applications of DMFC

    Article • Solid State Ionics, March 2009, Elsevier

    Dr Periyayya Uthirakumar

  83. Synthesis and optical properties of sword-like GaN nanorods clusters

    Article • Current Applied Physics, January 2009, Elsevier

    Dr Periyayya Uthirakumar

  84. InGaN/GaN Light-Emitting Diodes with Overcut-Shaped Periodic Microstructures Formed by Wet Etching Process

    Article • Electrochemical and Solid-State Letters, January 2009, The Electrochemical Society

    Dr Periyayya Uthirakumar

  85. Growth, morphology and optical properties of tris(8-hydroxyquinoline)aluminum/zinc oxide hybrid nanowires

    Article • Journal of Luminescence, October 2008, Elsevier

    Dr Periyayya Uthirakumar

  86. The Impact of ZnO Nanoparticle Interlayer on the Growth and Morphology of Broom-Like Single Crystalline Gallium Nitride

    Article • Journal of Nanoscience and Nanotechnology, October 2008, American Scientific Publishers

    Dr Periyayya Uthirakumar

  87. Effect of zinc oxide incorporation on the morphology of tris(8-hydroxyquinoline)aluminum/zinc oxide hybrid nanomaterials

    Article • Thin Solid Films, September 2008, Elsevier

    Dr Periyayya Uthirakumar

  88. Preparation and characterization of nano-scale ZnO as a buffer layer for inkjet printing of silver cathode in polymer solar cells

    Article • Solar Energy Materials and Solar Cells, May 2008, Elsevier

    Dr Periyayya Uthirakumar

  89. Hybrid fluorescent polymer–zinc oxide nanoparticles: Improved efficiency for luminescence conversion LED

    Article • Journal of Luminescence, March 2008, Elsevier

    Dr Periyayya Uthirakumar

  90. Preparation of exfoliated high-impact polystyrene/MMT nanocomposites via in situ polymerization under controlling viscosity of the reaction medium

    Article • Polymer Composites, February 2008, Wiley

    Dr Periyayya Uthirakumar

  91. TiO2 thin film gas sensor for monitoring ammonia

    Article • Materials Characterization, August 2007, Elsevier

    Dr Velumani Subramaniam, Dr Periyayya Uthirakumar

  92. Nanocrystalline ZnO particles: Low-temperature solution approach from a single molecular precursor

    Article • Journal of Crystal Growth, June 2007, Elsevier

    Dr Periyayya Uthirakumar

  93. Yellow light-emitting polymer bearing fluorescein dye units: Photophysical property and application as luminescence converter of a hybrid LED

    Article • Reactive and Functional Polymers, April 2007, Elsevier

    Dr Periyayya Uthirakumar

  94. ZnO nanoballs synthesized from a single molecular precursor via non-hydrolytic solution route without assistance of base, surfactant, and template etc

    Article • Physics Letters A, November 2006, Elsevier

    Dr Periyayya Uthirakumar

  95. Novel Fluorescent Polymer/Zinc Oxide Hybrid Particles:  Synthesis and Application as a Luminescence Converter for White Light-Emitting Diodes

    Article • Chemistry of Materials, October 2006, American Chemical Society (ACS)

    Dr Periyayya Uthirakumar

  96. Novel fluorescent polymer-zinc oxide hybrids for bright and efficient white light emitting diodes

    Article • September 2006, SPIE

    Dr Periyayya Uthirakumar

  97. Preparation and photophysical properties of organic fluorescent polymers and their nanoparticles

    Article • Journal of Applied Polymer Science, January 2006, Wiley

    Dr Periyayya Uthirakumar

  98. Exfoliated high-impact polystyrene/MMT nanocomposites prepared using anchored cationic radical initiator–MMT hybrid

    Article • European Polymer Journal, July 2005, Elsevier

    Dr Periyayya Uthirakumar

  99. Synthesis and characterization of polyesters containing fluorescein dye units

    Article • Polymer, June 2005, Elsevier

    Dr Periyayya Uthirakumar

  100. Preparation and characterization of exfoliated polystyrene/clay nanocomposites using a cationic radical initiator-MMT hybrid

    Article • European Polymer Journal, February 2005, Elsevier

    Dr Periyayya Uthirakumar

  101. Preparation of polystyrene/montmorillonite nanocomposites using a new radical initiator-montmorillonite hybrid via in situ intercalative polymerization

    Article • European Polymer Journal, November 2004, Elsevier

    Dr Periyayya Uthirakumar

  102. Preparation and characterization of new difunctional cationic radical initiator-montmorillonite hybrids

    Article • Colloids and Surfaces A Physicochemical and Engineering Aspects, October 2004, Elsevier

    Dr Periyayya Uthirakumar