Research Interest
After 9 years of research experience in nanomaterials I have developed deep interest in both one, two and three-dimensional carbon materials. Carbon nanomaterials (nanodiamond, CNT, graphene) have their own advantages and disadvantages. For example, main hurdle for the feasible application of single walled carbon nanotube (SWCNT) is its synthesis in large quantity with precise control on its length, chirality and diameter using CVD technique. And application of GNR (Graphene nano ribbons) is still not feasible because the large-scale production of graphene remains challenging. In contrast, due to the planar structure of GNR, it could be produced at small scale using Focused Ion Beam.
My goal is not only to achieve excellence in academic world but also to provide a bridge between fundamental science and real-world applications of carbon nanomaterials. So, main focus of my research would be to developed bottom-up paradigm to integrate carbon nanomaterials based nanodevices. “Bottom-up” approach will emphasize on a synthesis of carbon nanomaterials from their fundamental building blocks such as atoms, molecules, clusters and nanoparticles. The underlying theme of my research will be centred on a rational synthesis of carbon materials (single crystal diamond, known chirality carbon nanotube, graphene) with exquisite control on a dimension and crystalline nature, study of electronic and mechanical properties in a nanoscale regime and fabrication of novel devices based on carbon nanomaterials.
Initially, my research would be focused in four directions.
- Synthesis of known chirality single walled carbon nanotubes
- Synthesis of single layer graphene or graphene nanoribbon using CVD technique and strain induced band gap engineering using Focused Ion Beam Technique
- Fabrication of carbon nanotube field emitters
- Carbon nanotube and metal composites
- Synthesis of gem quality single crystal diamond and HPHT diamonds
- In-situ nano engineering (by electron irradiation in HRTEM) of carbon nanomaterials.
List of Publication:
1. Pawan K. Tyagi, Umananda M Bhatta, Ashutosh Rath, J. Raghavendra Rao, Jatis K. Dash, Sanjeev Kumar, P V Satyam, Migration and extrusion of metal nanowire inside the filled multi-Walled carbon nanotube (Communicated 2010)
2. Pawan K. Tyagi, Florian Banhart, The interaction between carbon nanotubes and copper or gold crystals (Accepted in Journal of nanoscience and nanotechnology, 2009).
3. Parameter window of diamond growth on GaN films by microwave plasma chemical vapor deposition, Dipti Ranjan Mohapatra, Padmnabh Rai, Abha Misra, Pawan K. Tyagi, Brajesh S. Yadav, D.S. Misra, Diamond and Related Materials,17,177 5( 2008).
4. Axial buckling and compressive behavior of nickel-encapsulated multiwalled carbon nanotubes, Abha Misra, Pawan K. Tyagi, Padmnabh Rai, Dipti Ranjan Mahopatra, Jay Ghatak, P. V. Satyam, D. K. Avasthi and D. S. MisraPhys. Rev. B, 76, 014108 (2007).
5. High-pressure behavior of Ni-filled and Fe-filled multiwalled carbon nanotubes H. K. Poswal, S. Karmakar, Pawan K. Tyagi, D. S. Misra, E. Busetto, Surinder M. Sharma, A. K. Sood, Physica Status Solidi (b) 244 , No. 10 (2007).
6. FTIR spectroscopy of multiwalled carbon nanotubes: A simple approach to study the nitrogen doping, Abha Misra, Pawan K. Tyagi, Padmnabh Rai and D. S. Misra, J. Nanosci. Nanotechnology,7,1820 (2007).
7.Pressure-induced phase transitions in cobalt-filled multiwalled carbon nanotubes, S. Karmakar, Pawan K. Tyagi, D. S. Misra, and Surinder M. Sharma, Phys. Rev. B 73, 184119 (2006).
8. Hexagonal diamond synthesis on h-GaN strained films, Abha Misra, Pawan K. Tyagi, Brajesh S. Yadav, Vivek Pancholi, P.Rai, I. D. Samajdar, D. S. Misra, Applied Physics Letters, 89, 071911(2006).
9. Re-orientation of the crystalline planes in confined single crystal nickel nanorods
Induced by heavy ion-irradiation, Abha Misra, Pawan K. Tyagi, Padmnabh Rai, Jay Ghatak, P.V. Satyam, D.K. Avasthi and D. S. Misra. Applied Physics Letters,89, 091907 (2006).
10. Step Growth in Single-Crystal Diamond Grown by Microwave Plasma Chemical Vapor Deposition, Pawan K. Tyagi, Abha Misra, K.N. Narayanan Unni , Padmnabh Rai ,Manoj K. Singh, Umesh Palnitkar, D. S. Misra, F. Le Normand , Mainak. Roy, S.K. Kulshreshtha, Diamond and Related Materials, 15, 304 (2006).
11. FTIR Studies of Nitrogen-Doped Carbon Nanotubes, Abha Misra, Pawan K. Tyagi, M. K. Singh and D. S. Misra, Diamond and Related Materials, 15, 385 (2006).
12. Structural damage on multiwalled carbon nanotubes and encapsulated single crystal nickel nanorods irradiated with Au +7 ions of 100 MeV, Abha Misra, Pawan K. Tyagi, Manoj K. Singh, D. S. Misra, Jay Ghatak, P. V. Satyam and D.K. Avasthi, Diamond and Related Materials, 15, 300 (2006).
13. Melting of CVD diamond lattice under 100 Mev Au+ irradtion and generation of defects, Umesh Palnitlar D. S. Misra, Pawan K. Tyagi, V.S. Shirodkar, E. Titus, D. K. Avasthi and P. Ayyub, Thin Solid Films, 503, 121 (2006).
14. Thermogravimetric analysis of cobalt-filled carbon nanotubes deposited by chemical vapour deposition, Babu P. Ramesh, W.J. Blau, P.K. Tyagi, D.S. Misra, N. Ali, J. Gracio, G. Cabral, E. Titus,Thin Solid Films,494,128(2006).
15. High-resolution transmission electron microscopy mapping of nickel and cobalt single crystalline rods inside multiwalled carbon nanotubes and chirality calculations. Pawan K. Tyagi, Abha Misra, Manoj K. Singh, D. S. Misra, Jay Ghatak, P. V. Satyam, F. Le Normand, Appl. Phys. Lett. 86, 253110 (2005).
16. Single crystalline nickel nanorods inside carbon nanotubes: their growth behavior, structure and magnetic properties, Pawan K. Tyagi, Abha Misra, Manoj K.Singh, E. Titus, D. S. Misra, Jay Ghatak, P. V. Satyam, Mainak Roy, Journal of Nanoscience and Nanotechnology, 5, 596 (2005).
17. Quantitative analysis of hydrogen in chemical vapor deposited diamond films, E. Titus, D.S. Misra, A.K. Sikder, P.K. Tyagi, M.K. Singh, Abha Misra, N. Ali, G. Cabral, V.F. Neto and J. Gracio, Diamond and related materials 14, 476 (2005)
18. Preparation of Ni-filled carbon nanotubes for key potential applications in nanotechnology, Pawan K. Tyagi, M. K. Singh, Abha Misra, N. Kumar, D. S. Misra, E. Titus, N. Ali, J. Gracio, M. Roy and A. K. Dua, Thin Solid Films, 469, 127 (2004)
19. Growth of (100) oriented diamond grains by the application of lateral temperature gradients across silicon substrates, E. Titus, D. S. Misra, Manoj. K. Singh, Pawan. K. Tyagi, Abha Misra, F. Le Normand, J. Gracio and N. Ali, Journal of Materials Research, 19, 3206 (2004).
20. Ni and Ni/Pt filling inside multiwalled carbon nanotubes, Manoj K. Singh, E. Titus, Pawan K. Tyagi, U A Palnitkar, D. S. Misra, Mainak Roy, A. K. Dua, C. S. Cojocaru, F. Le Normand, Journal of Nanoscience and Nanotechnology, 3, 165 ( 2003).
21. Diamond nucleation and growth on zeolites, E. Titus, M. K. Singh, K. N. N. Unni, P. K. Tyagi, A. K. Dua, Mainak Roy and D. S. Misra, Diamond and Related Materials, 12, 1647 (2003).
22. Effect of heavy ion irradiation on self-supported diamond sheets, Umesh Palnitkar, V. S. Shirodkar, Manoj K. Singh, Elby Titus, P. K. Tyagi, K. N. Unni, D. S. Misra, P. Ayuub and D. K. Avasthi, Diamond and Related Materials, 12, 1771 ( 2003).
23. Filling of carbon nanotubes, Pawan. K. Tyagi, Manoj. K. Singh. D. S. Misra, Published in Encylopedia of Nanoscience and Technology (American Scientific Publishers, Edited by Hari Singh Nalwa ),3, 416 (2003). |
