Faculty

Dr. Y. Ashok Kumar Reddy

Assistant Professor

E-mail: akreddy@iiitdm.ac.in | Ph: +91-44 2747 6369 | Room No: 119-L, Laboratory Complex (North-East)

Google scholar: https://scholar.google.com/citations?hl=en&user=nk&user

Vidwan: https://vidwan.inflibnet.ac.in/profile/94039

ORCID: https://orcid.org/0000-0001-5325-4985

Education

Sri Venkateswara University, India & BK21+ Post-doctoral Fellow at KAIST, South Korea

South Korea

Ph.D. in Physics

2009-2013 (Ph.D.) - 2013-2018 (Post-Doc)

Sri Venkateswara University, Tirupati

India

M.Sc. in Physics

2007 - 2009

Specialization

  1. Metal oxide nanostructures for defence/energy device applications

  2. Thin film coating technology and nanotechnology

  3. Materials science and engineering applications

Research Interests

  1. Metal oxide based nanostructures for defence & electronic device applications, Thin film coatings technology.

  2. *Ongoing Research Projects: 1. DRDO-CARS (2020-2022); Value: Rs. 42.99 Lakhs & 2.DST-INSPIRE Project (2018-2023); Value: Rs. 35 Lakhs

Honours + Awards + Recognitions

  1. DST-INSPIRE Faculty Award funded by Department of Science and Technology, Government of India, Ministry of Science & Technology (Aug. 2018 to July 2023)

  2. Postdoctoral researcher under BK21+ program funded by NRF, South Korea (Nov. 2013 to Feb. 2016)

  3. Junior Research Fellowship, University Grants Commission, New Delhi (July 2011 to Oct. 2013)

Work Experience

Teaching

  1. Present Employment: Assistant Professor in the dept. of Physics at IIITDM Kancheepuram, Chennai, India from January 2021 to till now.

  2. Past Employments: 1. Worked as a DST-INSPIRE Faculty at IIITDM Kancheepuram from August 2018 to December 2020

  3. 2. Guest faculty, Department of Physics, Sri Padmavati Women's Degree College, Tirupati (2011- 2012)

Research

  1. Senior-postdoctoral Researcher, Global Center for Open Research with Enterprise, Korea advanced institute of science and technology (KAIST), South Korea (Aug. 2017-July 2018)

  2. Research Professor, School of Electrical Engineering, KAIST, South Korea (Mar. 2016-July 2017)

  3. Postdoctoral Researcher, Information & Electronics Research Institute, KAIST, South Korea (Nov. 2013-Feb. 2016)

Industry

  1. i3 system, South Korea, Innovative Industry-University collaboration for developing the Infrared Image Detector (Aug. 2017-July 2018)

Professional Membership

  1. IEEE member of Electron Devices, Power & Energy Society

  2. Life member of Materials Research Society of India (MRSI)

  3. Editorial Board Member, Journal of Physics

  4. Editorial Board Member, American Journal of Materials Synthesis and Processing

Professional Service

  1. Reviewed the following journals:

  2. IEEE Sensors Journal

  3. ACS Nano

  4. Applied Surface Science (Elsevier)

  5. Journal of Alloys and Compounds (Elsevier)

  6. Surface and Interface Analysis (Wiley)

  7. Journal of Microelectromechanical Systems (IEEE)

  8. Photonics Technology Letters (IEEE)

Teaching

  1. PH2002: Physics of Materials

  2. PHY506: Materials Fabrication and Characterization Techniques

  3. MEC333T: Special Manufacturing Processes

Books

  1. 1. Y. Ashok Kumar Reddy, B. Ajitha, P. Sreedhara Reddy, Investigations on Nickel Oxide Based Thin Films for Gas Sensor Applications, LAP LAMBERT Academic Publishing, Germany, ISBN: 978-3-330-03817-2, 1-208 (2017)

  2. 2. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Synthesis of Silver Nanoparticles via Chemical and Green routes for Biological Applications, LAP LAMBERT Academic Publishing, Germany, ISBN: 978-3-330-04258-2, 1-155 (2017)

Journal Publications

  1. 41. P.V. Karthik Yadav, B. Ajitha, C.M.A. Ahmed, Y. Ashok Kumar Reddy*, V.R.M. Reddy, Superior UV photodetector performance of TiO2 thin films using Nb doping, Journal of Physics and Chemistry of Solids, 160 (2022) 110350

  2. 40. B. Ajitha, Chi Won Ahn, P.V. Karthik Yadav, Y. Ashok Kumar Reddy*, Silver nanoparticle embedded polymethacrylic acid/polyvinylpyrrolidone nanofibers for catalytic application, Journal of Environmental Chemical Engineering, 9 (2021) 106291

  3. 39. P.V. Karthik Yadav, B. Ajitha, V. Annapureddy, Y. Ashok Kumar Reddy*, Adem Sreedhar, Improved UV photodetector performance of NiO films by substitutional incorporation of Li, Materials Letters, 301 (2021) 130296

  4. 38. P.V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy*, Vasudeva Reddy Minnam Reddy, Enhanced performance of WO3 photodetector through hybrid graphene-layer integration, ACS Applied Electronic Materials, 3 (2021) 2056-2066

  5. 37. P.V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy*, Adem Sreedhar, Recent advances in development of nanostructured photodetectors from ultraviolet to infrared region: A review, Chemosphere, 279 (2021) 130473

  6. 36. P.V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy*, V.R. Minnam Reddy, M. Reddeppa, M-D. Kim, Effect of sputter pressure on UV photodetector performance of WO3 thin films, Applied Surface Science, 536 (2021) 147947

  7. 35. P.V. Karthik Yadav, Y. Ashok Kumar Reddy*, B. Ajitha, V.R. Minnam Reddy, Oxygen partial pressure dependent UV photodetector performance of WO3 sputtered thin films, Journal of Alloys and Compounds, 816 (2020) 152565

  8. 34. Y. Ashok Kumar Reddy*, B. Ajitha, A. Sreedhar, V. Eswaraiah, Enhanced UV photodetector performance in bi-layer TiO2/WO3 sputtered films, Applied Surface Science, 494 (2019) 575-582

  9. 33. Y. Ashok Kumar Reddy*, B. Ajitha, M. Reddeppa, A. Sreedhar, Improvement of UV photodetector properties of reactively sputtered TiO2-x films through vacuum annealing, Journal of Materials Science: Materials in Electronics, 30 (2019) 20687-20695

  10. 32. Y. Ashok Kumar Reddy*, B. Ajitha, Y.B. Shin, In-Ku Kang, Hee Chul Lee, Influence of passivation layer on thermal stability of Nb:TiO2-x samples for shutter-less infrared image sensors, Infrared Physics and Technology, 100 (2019) 52-56

  11. 31. Y. Ashok Kumar Reddy*, I-K. Kang, Y.B. Shin, Hee Chul Lee, Improvement of the thermal stability of Nb:TiO2-x samples for uncooled infrared detectors, Journal of Physics D: Applied Physics, 51 (2018) 025104

  12. 30. Y. Ashok Kumar Reddy*, Y.B. Shin, I-K. Kang, Hee Chul Lee, Influence of Nb doping concentration on bolometric properties of RF magnetron sputtered Nb:TiO2-x films, Journal of Electronic Materials, 47 (2018) 2171-2176

  13. 29. I-K. Kang, Y. Ashok Kumar Reddy*, Y.B. Shin, W.Y. Kim, Hee Chul Lee, Enhanced bolometric properties of nickel oxide thin films for infrared image sensor applications by substitutional incorporation of Li, Ceramics International, 44 (2018) 7808-7813

  14. 28. B. Ajitha, Y. Ashok Kumar Reddy*, Yonghee Lee, Min Jun Kim, Chi Won Ahn, Biomimetic synthesis of silver nanoparticles using Syzygium aromaticum (clove) extract: Catalytic and antimicrobial effects, Applied Organometallic Chemistry, 33 (2019) e4867

  15. 27. B. Ajitha, Y. Ashok Kumar Reddy*, H-J. Jeon, Chi Won Ahn, Synthesis of silver nanoparticles in an eco-friendly way using Phyllanthus amarus leaf extract: Antimicrobial and catalytic activity, Advanced Powder Technology, 29 (2018) 86-93

  16. 26. Y. Ashok Kumar Reddy*, I-K. Kang, Y.B. Shin, Hee Chul Lee, Bolometric properties of oxygen atmosphere annealed Nb:TiO2-x films for infrared detectors, Ceramics International, 43 (2017) 9207-9213

  17. 25. Y. Ashok Kumar Reddy*, Y.B. Shin, I-K. Kang, Hee Chul Lee, Effect of sputtering pressure on microstructure and bolometric properties of Nb:TiO2-x films for infrared image sensor applications, Journal of Applied Physics, 119 (2016) 044504

  18. 24. Y. Ashok Kumar Reddy*, Y.B. Shin, I-K. Kang, Hee Chul Lee, Substrate temperature dependent bolometric properties of TiO2-x films for infrared image sensor applications, Ceramics International, 42 (2016) 17123-17127

  19. 23. Y. Ashok Kumar Reddy†, B. Ajitha†, P. Sreedhara Reddy, H-J. Jeon, Chi Won Ahn, Role of capping agents in controlling silver nanoparticles size, antibacterial activity and potential applications as optical hydrogen peroxide sensors, RSC Advances, 6 (2016) 36171-36179

  20. 22. Y. Ashok Kumar Reddy*, Y.B. Shin, I-K. Kang, Hee Chul Lee, P. Sreedhara Reddy, Enhanced bolometric properties of TiO2-x thin films by thermal annealing, Applied Physics Letters, 107 (2015) 023503

  21. 21. Y. Ashok Kumar Reddy*, I-K. Kang, Y.B. Shin, Hee Chul Lee, Bolometric properties of reactively sputtered TiO2-x films for thermal infrared image sensors, Journal of Physics D: Applied Physics, 48 (2015) 355104

  22. 20. Y. Ashok Kumar Reddy, I-K. Kang, Y.B. Shin, Hee Chul Lee, P. Sreedhara Reddy, Oxygen partial pressure and thermal annealing dependent properties of RF magnetron sputtered TiO2-x films, Materials Science in Semiconductor Processing, 32 (2015) 107-116

  23. 19. Y. Ashok Kumar Reddy, A.S. Reddy, P. Sreedhara Reddy, Effect of oxygen partial pressure on the properties of NiO-Ag composite films grown by DC reactive magnetron sputtering, Journal of Alloys and Compounds, 583 (2014) 396-403

  24. 18. Y. Ashok Kumar Reddy*, B. Ajitha, P. Sreedhara Reddy, M.S.P. Reddy, J-H. Lee, Effect of substrate temperature on structural, optical and electrical properties of sputtered NiO-Ag nanocrystalline thin films, Electronic Materials Letters, 10 (2014) 907-913

  25. 17. Y. Ashok Kumar Reddy*, B. Ajitha, P. Sreedhara Reddy, Influence of thermal annealing on structural, morphological, optical and electrical properties of NiO-Cu composite thin films, Materials Express, 4 (2014) 32-40

  26. 16. Y. Ashok Kumar Reddy, A.S. Reddy, P. Sreedhara Reddy, Enhancement of NH3 gas sensing properties of NiO-based thin films deposited by DC reactive magnetron sputtering, Science of Advanced Materials, 6 (2014) 178-188

  27. 15. Y. Ashok Kumar Reddy, A.S. Reddy, P. Sreedhara Reddy, Substrate temperature dependent properties of Cu doped NiO films deposited by DC reactive magnetron sputtering, Journal of Materials Science & Technology, 29 (2013) 647-651

  28. 14. Y. Ashok Kumar Reddy, A.S. Reddy, P. Sreedhara Reddy, Influence of oxygen partial pressure on the structural, optical and electrical properties of Cu-doped NiO thin films, Physica Scripta, 87 (2013) 015801

  29. 13. K.M. Rajesh, B. Ajitha, Y. Ashok Kumar Reddy*, Y. Suneetha, P. Sreedhara Reddy, Chi Won Ahn, A facile bio-synthesis of copper nanoparticles using Cuminum cyminum seed extract: Antimicrobial Studies, Advances in Natural Sciences: Nanoscience and Nanotechnology, 9 (2018) 035005

  30. 12. K.M. Rajesh, B. Ajitha, Y. Ashok Kumar Reddy*, Y. Suneetha, P. Sreedhara Reddy, Assisted green synthesis of copper nanoparticles using Syzygium aromaticum bud extract: Physical, optical and antimicrobial properties, Optik, 154 (2018) 593-600

  31. 11. I-K. Kang, Y. Ashok Kumar Reddy, Y.B. Shin, W.Y. Kim, Hee Chul Lee, Sputtering pressure dependent bolometric properties of Ni1-xO thin films for uncooled bolometer applications, Ceramics International, 43 (2017) 9498-9504

  32. 10. B. Ajitha, Y. Ashok Kumar Reddy, M.J. Kim, H-J. Jeon, Chi Won Ahn, Superior catalytic activity of synthesized triangular silver nanoplates with optimized sizes and shapes, Catalysis Science & Technology, 6 (2016) 8289-8299

  33. 9. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Y. Suneetha, H-J. Jeon, Chi Won Ahn, Instant biosynthesis of silver nanoparticles using Lawsonia inermis leaf extract: Innate catalytic, antimicrobial and antioxidant activities, Journal of Molecular Liquids, 219 (2016) 474-481

  34. 8. Y.B. Shin, Y. Ashok Kumar Reddy, I-K. Kang, Hee Chul Lee, Nb doping effect on TiO2-x films for bolometer applications, Journal of Physics and Chemistry of Solids, 91 (2016) 128-135

  35. 7. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Green synthesis and characterization of silver nanoparticles using Lantana camara leaf extract, Materials Science and Engineering: C, 49 (2015) 373-381

  36. 6. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Enhanced antimicrobial activity of silver nanoparticles with controlled particle size by pH variation, Powder Technology, 269 (2015) 110-117

  37. 5. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Biosynthesis of silver nanoparticles using Momordica charantia leaf broth: Evaluation of their innate antimicrobial and catalytic activities, Journal of Photochemistry and Photobiology B, 146 (2015) 1-9

  38. 4. I-K. Kang, Y. Ashok Kumar Reddy, Y.B. Shin, Hee Chul Lee, Systematic investigation on deposition temperature effect of Ni1-xO thin films for uncooled infrared image sensor applications, IEEE Sensors Journal, 15 (2015) 7234-7241

  39. 3. B. Ajitha, Y. Ashok Kumar Reddy, S. Shameer, K.M. Rajesh, Y. Suneetha, P. Sreedhara Reddy, Lantana camara leaf extract mediated silver nanoparticles: Antibacterials Antibacterial, green catalyst, Journal of Photochemistry and Photobiology B, 149 (2015) 84-92

  40. 2. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Biogenic nano-scale silver particles by Tephrosia purpurea leaf extract and their inborn antimicrobial activity, Spectrochimica Acta, Part A, 121 (2014) 164-172

  41. 1. B. Ajitha, Y. Ashok Kumar Reddy, P. Sreedhara Reddy, Biosynthesis of silver nanoparticles using Plectranthus amboinicus leaf extract and its antimicrobial activity, Spectrochimica Acta, Part A, 128 (2014) 257-262

Conference Publications

  1. 8. P.V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy, Improved UV photodetector performance of NiO films by substitutional incorporation of Li (2021)893 [International Conference on Nanoscience and Nanotechnology (ICONN 2021), SRM IST, Chennai, Feb 01-03, 2021]

  2. 7. P.V. Karthik Yadav, Y. Ashok Kumar Reddy, Influence of Nb doping on photodetector performance of TiO2 films (2020) [International Conference on Material Science for Societal Advancement (MSSA 2020), Osmania University, Hyderabad, Jan 20-22, 2020]

  3. 6. Y. Ashok Kumar Reddy, B. Ajitha, Eswaraiah Varrla, Enhanced UV photodetector performance in bi-layer TiO2/WO3 sputtered films, (2019) 289 [International Conference on Nano science and Nanotechnology, SRM IST, Chennai, India, Jan 28-30, 2019].

  4. 5. Y. Ashok Kumar Reddy, I-K. Kang, Y. B. Shin, Hee Chul Lee, Oxygen atmosphere annealing effect on the thermal stability of TiO2-x based films for shutter-less infrared image sensors, Key Engineering Materials, 775 (2018) 272-279 [8th International Conference on Key Engineering Materials, Japan, March 16-18, 2018].

  5. 4. Y. Ashok Kumar Reddy, Y.B. Shin, I-K. Kang, Hee Chul Lee, Influence of deposition temperature on TiO2-x films for infrared image sensor applications, IEEE Sensors Proceedings, South Korea, ISBN: 978-1-4799-8202-8 (2015) 1-4 [International Conference on IEEE Sensors, South Korea, November 1-4, 2015].

  6. 3. Y. Ashok Kumar Reddy, A.S. Reddy, P. Sreedhara Reddy, Influence of oxygen partial pressure on the physical properties of Ag doped NiO thin films, AIP Conf. Proc., 1536 (2013) 475-476 [International Conference on Recent trends in Applied Physics & Material science, Bikaner, February 01-02, 2013].

  7. 2. Y. Ashok Kumar Reddy, A.M. Reddy, A.S. Reddy, P. Sreedhara Reddy ,Structural and electrical properties of pure and Cu doped NiO films deposited at various oxygen partial pressures, AIP Conf. Proc., 1512 (2013) 640-641 [57th DAE Solid State Physics Symposium, BRNS, IIT Bombay, India, 3-7, December 2012].

  8. 1. A.M. Reddy, Y. Ashok Kumar Reddy, C.S. Reddy, A.S. Reddy, P. Sreedhara Reddy, Oxygen partial pressure dependent properties of nanocrystalline nickel oxide thin films, Springer Proc. in Physics, 143 (2013) 165-168 [International Conference Advanced nanomaterials and Nanotechnology, IIT Guwahati, December 8-10, 2011].

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