FACULTY PROFILE
Dr. V.Venkatramu
Assistant Professor & Coordinator
+91-9985608162, (OFF):08562-225403, 08562-225419
vvramu@yogivemanauniversity.ac.in, vvramuphd@gmail.com
Qualification :
Ph.D. in Physics (2006) from Department of Physics, Sri Venkateswara University, Tirupati, A.P.
PDF/Teaching experience :

1) Assistant Professor, Yogi Vemana University, Kadapa -516 003. June 2007 Till to date.
2) Guest Scientist/Visiting Scientist, University of La Laguna, Spain, May-June 2008, 2009, 2010.
3) Coordinator for Dept. of Materials Science and Nanotechnolgy, Yogi Vemana University, Kadapa -516 003. April 2009 -July 2009.
4) Member in Directorate of Admissions, Yogi Vemana University, Kadapa -516 003. March 2008-April 2011.
5) Guest Scientist, University of Paderborn, Paderborn, Germany, September 2006.
6) Post Doctoral Fellow, Università di Verona, Italy, June 2006-June 2007.
7) CSIR-Senior Research Fellow, Sri Venkateswara University Tirupati - 517 502, April 2006-June 2006
8) UGC-Project Fellow, Sri Venkateswara University, Tirupati - 517 502, April 2002-March 2005

UGC-Project Fellow Sri Venkateswara University Tirupati - 517 502, April 2002 March 2005
Area/s of research interests :
Solid State Spectroscopy, Glass Science and Technology, Photonics, Nanomaterials Science and Nanotechnology
Projects undertaken :
1. Optimization of structural and luminescence properties of Ln3+/Yb3+- doped Lu3Ga5O12 nanocrystalline garnets for the development of light emitting devices”. Project Sanction No. 2010/20/34/5/BRNS, Sponsoring Agency is Board of Research in Nuclear Sciences (BRNS), Mumbai. The duration period: 2010-2013, Total outlay of the Project (Rs.): 14,90,000.
2. Dr. V. Venkatramu, Member, Project Title:  “Optical Properties of Rare-earth ions in Solids at High pressure”.Indo-Spain International Collaborative Project Sanction No: PCI2006-A7-0638, Sponsoring Agency is Ministry of Science and Innovation (MICINN), Spain. The duration period: 2008-2011, Total outlay of the Project (Euro): 27,000
Achievements/Awards/Invitations: :

1) January 2011: DAE Research Award for Young Scientists, Govt. of India, Mumbai, INDIA.
2) May-June 2010: Visiting Scientist, University of La Laguna, SPAIN.
3) May-June 2009: Guest Scientist, University of La Laguna, SPAIN.
4) May-June 2008: Visiting Scientist, University of La Laguna, SPAIN.
5) September 2006: Guest Scientist, University of Paderborn, GERMANY.
6) June 2006-June 2007: Post Doctoral Fellow, University of Verona, ITALY.
7) April 2006-June 2006: Senior Research Fellow of Council of Scientific and Industrial Research, Govt. of India,

New Delhi, INDIA.
8) April 2002-March 2005: Project Fellow of University Grants Commission, Govt. of India, New Delhi, INDIA.

Details of significant paper publications :
1. C. K. Jayasankar, V. Venkatramu, S. Surendra Babu, P. Babu, Luminescence properties of Dy3+ ions in a variety of borate and fluoroborate glasses containing lithium, zinc and lead. J. Alloys. Compds. 374 (2004) 22. IF = 2.135.
2. V. Venkatramu, D. Navarro-Urrios, P. Babu, C. K. Jayasankar, V. Lavin, Fluorescence line narrowing spectral studies of Eu 3+-doped lead borate glass. J. Non-Cryst. Solids 351 (2005) 929. IF = 1.252.
3. C. K. Jayasankar, V. Venkatramu. P. Babu, Th. Troester, W. B. Holzapfel, G. Wortmann High pressure fluorescence study of Sm3+ -doped borate and fluoroborate glasses. J. Appl. Phys. 97 (2005) 093523. IF = 2.278.
4. V. Venkatramu, P. Babu, C. K. Jayasankar, Fluorescence properties of Eu3+ ions doped borate and fluoroborate glasses containing lithium, zinc and lead. Spectrochim. Acta A 63 (2006) 276. IF = 1.566.
5. V. Venkatramu, P. Babu, C. K. Jayasankar, W. Sievers, Th. Tröster, G. Wortmann, Optical spectroscopy of Sm3+ ions in phosphate and fluorophosphate glasses. Optical Materials 29 (2007)1429. IF = 1.728.
6. V. Venkatramu, D. Falcomer, A. Speghini, M. Bettinelli and C. K. Jayasankar, Synthesis and luminescence properties of Er3+ -doped Lu3Ga5O12 nanocrystals. J. Lumin. 128 (2008) 811. IF = 1.847.
7. V. Mahalingam, F. Mangiarini, F. Vetrone, V. Venkatramu, M. Bettinelli, A. Speghini, J.A. Capobianco, Bright White Upconversion Emission from Tm3+/Yb3+/Er3+-doped Lu3Ga5O12 Nanocrystals. J. Phys .Chem C (Letter) 112 (2008)17745. IF = 4.224
8. R. Praveena, V. Venkatramu, P. Babu, C. K. Jayasankar, Th. Tröster, W. Sievers and G. Wortmann, Luminescence properties of Sm3+-doped P2O5-PbO-Nb2O5 glass under high pressure. J. Phys. : Condensed Matter 21 (2009) 035108. IF = 2.364.
9. V. Venkatramu, P. Babu, I.R. Martín, V. Lavín, Juan E. Muñoz-Santiuste, Th. Tröster, W. Sievers, G. Wortmann and C.K. Jayasankar, Role of the local structure and the energy trap centers in the quenching of luminescence of the Tb3+ ions in fluoroborate glasses: A high pressure study. J. Chem. Phys.132 (2010)114505. . IF = 3.177.
10. V Venkatramu, M. Giarola, G. Mariotto, S. Enzo, S. Polizzi, C. K. Jayasankar, F. Piccinelli, M. Bettinelli and A. Speghini, Nanocrystalline lanthanide -doped Lu3Ga5O12 garnets: interesting materials for light-emitting devices. Nanotechnology 21 (2010) 175703. IF = 3.137.
Number of Research Papers published in Internationally reputed journals:
21
Countries Visited :
1. Italy: June 2006 to June 2007, Università di Verona, Verona, as a Post Doctoral Fellow to work on Lanthanide doped Nanocrystals.
2. Germany: September 2006, University of Paderborn, Germany as a Guest Scientist to work luminescence properties of Ln3+-doped glasses under High Pressure.
3. Spain: May-June 2008, May-June 2009, May 2010 to June 2010--University of La Laguna, Tenerife, Spain to carry out Indo-Spain international collaborative research project.
Research papers presented at National and International Seminar/Symposium/Workshop:
35
Membership in Professional Bodies :
Life Member in Indian Laser Association.