My research field or area of interest innanotechnology
Development of a new synthetic route for rapid synthesis of conducting polymer nanocomposites for the use of proto type domestic gas sensors Identify and optimization of new synthetic method for the rapid production of nanometal oxide resulting in significant cost reduction, and thus making it an industrially viable process Created a simple cost efficient method to synthesize nanofibers, nanorods and nanocombs for Humidity and LPG sensing. Fabrication of proto type sensor set up for laboratory and domestic uses.
Chemical synthesis of size and shape controlled metal oxide nanomaterials (titania, titanates, Zinc oxide, cadmium oxide and ferrites) using colloidal approaches (sol-gel, microemulsions), for sensor and antimicrobial studies. Synthesis of porous metal oxide materials using organic template methods Hydrothermal and solvo-thermal synthesis of titania, zinc oxide and ferrites and utilizing electric oven and microwave reactor Synthesis of magnetic and non magnetic materials by employing coprecipitation, combustion, SPCR and microwave acetate route. Preparation of nanostructure thin films of non-conducting blends by hot pressing method. Synthesis of nanoferrites / metal oxides by employing solid state method. Synthesis of novel nanomaterials by biological routes (bacteria, fungi, actinomyceta and plant extract). Studies on microbial activity of nano titanium oxides. Synthesis of polymer ceramic nanocomposites by in situ/interfacial method, Determination of crystal structure and morphology of the materials using XRD, Raman Spectra and Scanning Electron Microscopy, Atomic Force Microscopy, Transmission Electron Microscopy etc Thermal stability of nanocomposites/oxides/ferrites using thermal analyzer (TGA-DSC instrument). Transport studies by using two/four probes dc and ac conductivity. Analysis and interpretation of pore size, pore volume, surface area using BET Surface area analyzer Interpretation of surface elemental composition and amount of dopants using XPS spectra Identification of optical absorption and surface functional groups using UV-Vis absorption and FT-IR Fabrication of prototype sensor set up for demonstration in laboratory.
PUBLICATIONS IN REPUTED JOURNALS 1. Core-Shell method of Synthesis, Characterizations and ac conductivity studies of polyaniline /n-TiO2 composites, Aashis. S. Roy, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad; J. Appl. Poly. Sci, 121 (2011) 675 2. Sensitivity enhancement for LPG detection by employing Cadmium oxide doped in nanocrystalline polyaniline, Aashis. S. Roy, Machappa T, Sasikala.M.V.N and M. V. N. Ambika Prasad; Sensor letter, 9, 2011, 1-7 3. Studies of AC Conductivity and Dielectric Relaxation Behavior of CdO doped nanometric Polyaniline, Aashis. S. Roy, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad; J. Appl. Poly. Sci, 23 (2011) DOI 10.1002/app.34696 4. Selectivity and Influence of Ta2O5 on Polyaniline surface for Liquid Petroleum Gas Sensing; Aashis.S.Roy, M.V.N.Ambika Prasad and Koppalkar.R.Anilkumar; Emerald: Sensor Review; (2011) 5. Impedance spectroscopy of nanostructured polyaniline/CdO composites, Aashis. S. Roy, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad; Ferroelectric, DOI: 10.1080/00150193.2011.531190 6. Synthesis and characterization of elongated chain-like Nanostructure Polyaniline in Ice cube" Aashis. S. Roy, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad; J. polymer & polymer composites, 2010, (Accepted) 7. Effect of Nano - Titanium Dioxide with Different Antibiotics against Methicillin- Resistant Staphylococcus Aureus; Aashis. S. Roy, Ameena Parveen, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad, J. Biomaterials and Nanobiotec, 2010, 1, 37-41 8. Sensitivity and Selectivity Studies on Polyaniline/Molybdenum Trioxide Composites to Liquid Petroleum Gas, Aashis. S. Roy, Machappa T, M. V. N. Ambika Prasad and Koppalkar.R.Anilkumar; Sensor and Transducer; 125, 2011,.220-228 9. Synthesis and morphological change in poly (ethyleneoxide) – sodium chlorate based polymer electrolyte complex with polyaniline. H. Kunteppa, Aashis.S.Roy, Anil. R. Koppalkar, M. V. N. Ambika Prasad, Physica. B (2010), doi: 10.1016 / j.physb. 2010. 11.074 10. Synthesis, characterization and electrochemical properties of poly (ethylene oxide) - based polyaniline electrolyte complex, Kunteppa.H, Aashis.S.Roy, Devendrappa H and M.V.N.Ambika Prasad; J. App. Poly. Sci; (In print- 2011) 11. Studies on Fourier Transform Infrared Spectroscopy,Scanning Electron Microscope, and Direct Current Conductivity of Polyaniline Doped Zinc Ferrite, Ramesh Patil, Aashis S. Roy, Koppalkar R. Anilkumar, Srikant Ekhelikar, J. App. Poly. Sci; DOI 10.1002/app.33600 12. Design And Development Of An Extensive Vapour Bleeding System At The Evaporators; K.S.Venkatesh, Aashis.S.Roy; J.Chemical Tech; 5 (1) 2010 13. Nanostructured zinc oxide enhances the activity of antibiotics against staphylococcus aureus; Venubabu Thati, Aashis.S.Roy, M.V.N.Ambika Prasad, C. T. Shivannavar and S.M.Gaddad, J Biosci Tech, Vol 1 (2),2010, 64‐69. 14. Development and Installation of High Pressure Boilers for Co-Generation Plant in Sugar Industries; Kolar Seenappa Venkatesh, Aashis. S. Roy; Smart Grid and Renewable Energy, 2010, 1, 51-53 15. Gravity flow of dusty viscoelastic fluid through an inclined channel with the effect of magnetic field, Geetanjali Alle, Aashis.S.Roy, Sangshetty Kalyane and Ravi M Sonth, International Journal of Engineering and Technology, 3(2), 2011, 119-130 16. Unsteady flow of a dusty visco-elastic fluid through a incliend channel, Geetanjali Alle, Aashis.S.Roy, Sangshetty Kalyane and Ravi M Sonth, Advances in Pure Mathematics, 2011, 1, 187-192 17. Electrical Conductivity of Polyaniline /NiZnO3 composites: A solid state electrolyte; Ramesh Patil, Aashis. S. Roy, Koppalkar R. Anilkumar, Srikant Ekhelikar, Ferroelectric, (In print- 2011) 18. Synthesis, Characterization, ac conductivity and dielectric studies on nickel ferrite; Omprakash.S, Aashis. S. Roy, P.S.Naik, International Journal of Basic and Applied Research, (Accepted 2011) MANUSCRIPTS TO BE PUBLISHED 1. A new approach towards Synthesis, Characterization and its sensor properties of core shell polyaniline / nano-TiO2 composite; Aashis. S. Roy, Koppalkar.R.Anilkumar and M.V.N.Ambika Prasad; Talanta; (2011) 2. Design of sensor setup and study of LPG gas sensor using polyaniline/n-TiO2 composites; Aashis.S.Roy, Koppalkar.R.Anilkumar, M.Sasikala and M.V.N.Ambika Prasad; J. App. Poly. Sci; (2011) (Under revision) 3. Studies on Morphology and Thermal properties of core-shell polyaniline/n-TiO2 composites; Aashis.S.Roy, Koppalkar.R.Anilkumar, and M.V.N.Ambika Prasad; J. of Thermal Analysis and Calorimetry; (2011) (Under revision) 4. Synthesis, characterization and humidity studies of polyaniline/CdO composites; Aashis.S.Roy, Koppalkar. R. Anilkumar, and M.V.N. Ambika Prasad; Emerald: Sensor Review; (2011) (Under revision) 5. Thermal studies on nanostructured polyaniline/CdO composites; Aashis.S.Roy, Koppalkar.R.Anilkumar, and M.V.N.Ambika Prasad; Composites A: Manufacture and Applied Science; (2011) 6. Combined effect of nano CuO and various antibiotics against staphylococcus aureus; Shagufta Naseer, Aashis.S.Roy, M.V.N. Ambika Prasad and Y.M. Jayaraj; J. Nano bimaterials & Microbilogy; (2010). 7. Dielectric Relaxation and AC Conductivity Behavior of Polyaniline-Zinc ferrite composite, Ramesh Patil1, Aashis.S.Roy, Koppalkar R.Anilkumar3, K.M.Jadhav and Shrikant Ekhelikar, Composites Part B (2011) 8. Synthesis, Characterization and AC Conductivity Studies of Polyaniline/PbO Composites; Vijaylaxmi m, Aashis. S. Roy, Kolar Seenappa Venkatesh, Condensed Matter: Physica B, (2011) 9. Synthesis, Characterization and DC Conductivity Studies of Polyaniline/PbO Composites; Vijaylaxmi m, Aashis. S. Roy, Kolar Seenappa Venkatesh, Solid State Science, (2011) 10. CONFERENCE PRESENTATIONS/PAPERS 1. Presented a paper entitled “Biosynthesis of silver nanoparticles using fusarium oxysporium” to a conference on “Advance in Materials Science –AMS 06, held at Department of Materials Science, Gulbarga University during January 9th to10th, 2006 2. Attended a conference on “Advance in Materials Science –AMS 07, held at Department of Materials Science, Gulbarga University during January 27th to28th, 2007 3. Attended a conference on “Nanotechnology in India’s Future- 2nd Bangalore Nano” during December 11 – 13th, 2008 at JNCSIR, Bangalore 4. Attended a conference on “ Advances in Ceramic and Engineering Materials” held at Dept. of Ceramic & Cement Technology, PDA College of Engineering, Gulbarga during 3-01-2009 5. Participated a workshop on “Computational Materials Science” during March 6th – 8th, 2009 at Indian Institute of Science, Bangalore. 6. Attended a conference on “Recent Trends in Nanoscience and Green Chemistry” during October 23rd and 24th, 2009 at S.S.Margol College of Arts, Science and Commerce, Shahabad, Gulbarga. 7. Synergetic effect of Nanostructured zinc oxide with different antibiotics on Staphylococcus aureus, held in “Advance in Nanoscience for Different Technology” during 10-11th, February, 2011, at Shrikrishna Mahavidyalaya, Gunjoti, Omerga. 8. Surrogate the steam driven mill drives with electric DC motors; held in “Advance in Nanoscience for Different Technology” during 10-11th, February, 2011, at Shrikrishna Mahavidyalaya, Gunjoti, Omerga. 9. Synthesis, Characterization and DC conductivity studies on polyaniline doped with nanocopper oxide; on “Advance in Nanoscience for Different Technology” during 10- 11th, February, 2011, at Shrikrishna Mahavidyalaya, Gunjoti, Omerga. 10. Attended a symposium on “National Seminar on X-ray Diffraction Techniques” held at Dept. of Physics, Gulbarga University, during March 2nd and 3rd 2010. 11. Participated in the International Conference on “Recent Trends in materials Scince and Technology” held in Indian Institute of Space Science and Technology, Thiruvananthapuram during October 29-31st 2010. 12. Presented a paper entitled “Comparative study of LPG sensing of nanostructured polyaniline fibers & bulk polyaniline” in International Conference on “Communication, Computation, Control and Nanotechnology –ICN 2010” held during 29-30, 2010 at Rural Engineering College, Bhalki. 13. Presented a paper entitled “Microwave absorption studies on polyaniline/Pr2O3 composites” in International Conference on Communication, Computation, Control and Nanotechnology –ICN 2010, held during 29-30, 2010 at Rural Engineering College, Bhalki. 14. Presented a paper entitled “Microwave absorption studies on polyaniline/MoO3 composites” in International Conference on “Communication, Computation, Control and Nanotechnology –ICN 2010” held during 29-30, 2010 at Rural Engineering College, Bhalki. 15. Presented a paper entitled “Studies on thermal stability of Core-shell polyaniline/n- TiO2 composites” in International conference on Latest Trend in Nanoscience and Nanotechnology” during 28th & 29th held at Khaja Banda Nawaz College of Engineering College, Gulbarga. 16. Presented a paper entitled “Impact of nanotechnology on environmental pollution” in National Conference on “Biodiversity and Environment – 2011” held during 3rd - 5th, Department of Zoology, Gulbarga University, Gulbarga.
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