Field emission investigations of solvothermal synthesized and soaked rutile-TiO2 nanostructures
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In present work we report synthesis of rutile-TiO2 by using a simple solvothermal method. The formation of pure single phase rutile-TiO2 has been confirmed by X-ray diffraction (XRD) and Raman spectroscopy analysis. The XRD analysis revealed that as-prepared and soaked-TiO2 has pure rutile phase with tetragonal crystal structure. The field emission scanning electron microscopy and high resolution transmission electron microscopy analysis shows that as-prepared TiO2 has nano-rods like morphology whereas soaked-TiO2 has nano-flowers like morphology with atomically sharp edges. The UV–Visible spectroscopy analysis showed that as-prepared and soaked rutile-TiO2 nano-structures have absorption edge in the visible range and having band gap of ~ 3.58 eV. The field emission (FE) properties of as-prepared and soaked rutile-TiO2 nano-structures were investigated and it was observed that as-prepared and soaked rutile-TiO2 display excellent FE properties with low turn-on field (~ 4.8 V/µm for 10 µA/cm2), maximum current density [~ 444 µA/cm2 (as-prepared) and 508 µA/cm2 (soaked)] and superior current stability (~ 3 h for ~ 1 µA). The obtained results show that the rutile-TiO2 nanostructures can be useful for practical applications in vacuum nano/microelectronic devices.
Ajinkya Bhorde thankful to Department of Science and Technology (DST), Government of India for INSPIRE Ph. D. fellowship. Ravindra waykar, Shruthi Nair and Subhash Pandharkar are thankful to the and Ministry of New and Renewable Energy (MNRE), Government of India for the financial support under National Renewable Energy Fellowship (NREF) program. Haribhau Borate is thankful to University Grants Commission, New Delhi for financial support under Faculty Improvement Program (FIP) for college teachers. One of the authors Sandesh Jadkar is thankful to University Grants Commission (UPE program), New Delhi and Indo-French Centre for the Promotion of Advanced Research-CEFIPRA, Department of Science and Technology, New Delhi for special financial support.
- 4.L. Li, N. Koshizaki, J. Mater. Chem. 20, 2972–2978 (2010)Google Scholar
- 15.P. Singh, N. Jadhav, Int. J. Electroact. Mater. 3, 1–5 (2015)Google Scholar
- 23.Y. Zhu, H. Li, Y. Koltypin, Y.R. Hacohen, A. Gedanken, Chem. Commun. 24, 2616–2617 (2001)Google Scholar
- 26.N. Asim, S. Ahmadi, M. Alghoul, F. Hammadi, K. Saeedfar, K. Sopian, Int. J. Photoenergy 21, 518156 (2014)Google Scholar
- 28.N. Jagtap, M. Bhagwat, P. Awati, V. Ramaswamy, Thermochim. Acta 37, 427 (2005)Google Scholar
- 30.M. Zavala, S. Morales, M. Santos, Heliyon, 3,00456 (2017)Google Scholar
- 31.C. Brinker, G. Scherer, S.-G. Science, The physics and chemistry of Sol–Gel processing (Academic Press Inc., USA, 1990)Google Scholar
- 32.B. Wang, D. Xue, Y. Shi, F. Xue, Titania 1D nanostructured materials: synthesis, properties and applications, In Nanorods, nanotubes and nanomaterials research progress, ed. by W. Prescott, A. Schwartz (New Nova Science Publishers Inc., New York, 2008), pp. 163–201Google Scholar
- 38.B. Cullity, S. Stock, Elements of X-ray Diffraction, 3rd ed. (Princeton Hall, New Jersey, 2001)Google Scholar