Intense field electron emission source designed from large area array of dense rutile TiO2 nanopillars

  • Pravin N. Didwal
  • Parameshwar R. Chikate
  • Prashant K. Bankar
  • Mahendra A. More
  • Rupesh S. DevanEmail author


The uniform and highly dense nanopillars of rutile TiO2 were synthesized by the hydrothermal method and demonstrated as a highly intense source for the application in field electron emission. The TiO2 nanopillars formed by a bunch of the many nanorods were nearly perpendicular to FTO substrate. The stoichiometric composition and chemical properties of Ti and O were confirmed by X-ray photoelectron spectroscopy. The rutile TiO2 nanopillars transferred on the carbon tape to prepare cathode for field emission (FE) performance exhibit the superior current density of 1.03 mA/cm2 at the applied electric field of 3.2 V/µm, and the lower turn-on field of 1.2 V/µm defined at a current density of 10 µA/cm2. The result of the FE revealed that rutile TiO2 nanostructure enhances the FE without any coating, doping, and surface modifications.



The authors would like to thank the UGC-DAE-CSR Indore, and Department of Science and Technology (DST), Ministry of Science and Technology of India, for their financial support of this research under Grant No. CSR-IC-BL-65/CRS-182/2017-18/189, and INSPIRE Faculty Award No. DST/INSPIRE Faculty Award/2013/IFA13-PH-63, respectively.


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Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringChonnam National UniversityGwangjuSouth Korea
  2. 2.Department of Physics (FormerlySavitribai Phule Pune University, University of Pune)PuneIndia
  3. 3.Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of TechnologyIndoreIndia

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