Debasis Bera

Place of work: United States of America
University:

University of Florida

Laboratory:

Department of Materials Science and Engineering

Field of research: Optical Materials, Quantum dots, Solid state lighting, Nanomaterials and Nanotechnology, Bio-imaging

Resume

Debasis Bera
Ph No: 352-846-3331 Fax: 352-392-4911; E-mail: dbera@mse.ufl.edu

Research Interest

Semiconducting quantum dots, Carbon nanotubes, Metallic and oxide nanoparticles, Synthesis of nanostructured materials, Characterization of nanomaterials, Application in solid-state lighting and Bioimaging

Awards and Honors

§ Graduate Travel Award from Graduate Studies of University of Central Florida for MRS conference at Boston (October 2004).
§ Student Travel Grant recipient from Electrodeposition Division of Electrochemical Society (ECS) for the ECS conference at Hawaii (August 2004)
§ First place in Poster contest at International Metallographic Contest 2004 Organized by IMS and ASM in the category Class 8: Artistic Microscopy (August 2004)
§ Honorable Mention position in Poster contest at International Metallographic Contest 2004 Organized by IMS and ASM in the category Class 3: Transmission Electron Microscopy (August 2004)
§ Student Government Association (SGA) travel grant for ECS Conference at Hawaii (August 2004)
§ ECS Travel Grant for presenting paper at ECS conference at San Antonio on 10th May 2004
§ Awarded Fellowship for Summer Research Institute at Pacific Northwest National Laboratory (PNNL) for 10 weeks program (May 2004).
§ First Place in Florida chapter poster competition American Society of Materials (ASM); (April 2004)
§ Travel Award from Student Government Association (SGA) for oral presentation at 205th Electrochemical Society Meeting at San Antonio TX (April 2004).
§ Best in the Category Award at the category of ‘All Science and Engineering departments, CREOL, Simulation and Training’ for poster competition organized by Graduate Research Forum at University of Central Florida (March 2004)
§ Graduate Travel Award from Graduate Studies of University of Central Florida (March 2004)
§ Certificate of Excellence for Poster Presentation organized by Graduate Research Forum (University of Central Florida) (March 2004)
§ AFM Certificate from Molecular Imaging (Arizona) (September 2003).
§ NSF Fellowship for NSF Summer Institute on Nanomechanics and Materials, (August 2003)
§ Certificate of Appreciation for the Participation in NSF sponsored RET & REU program, (July, 2003)
§ Award of CSIR/NET Qualification and CSIR Fellowship (India’s Most Prestigious fellowship in science at graduate level) in Chemistry (June 2000)
§ Award of GATE Qualification (Chemistry)-2000 (Percentile 91.33) and GATE Fellowship in Chemistry (April 2000).

Patent
Doctoral research work on carbon nanotubes (CNTs) is being considered as an intellectual property (at final stage).

Current Research

(1) Development of Quantum dots for Electroluminescent Devices and Biological Application: II-IV Qdots, CdS:Mn, CdS:Mn/ZnS, ZnS/CdS/ZnS, ZnO, ZnO/MgO, CdSe/SiO₂, CdTe, are synthesized using microemulsion, hot-solution and sol-gel processes for solid-state lighting and bioimaging application. CdS:Mn/ZnS Qdots are used as in vivo multimodal bio-imaging material. These Quantum dots show enhanced photoluminescence due to core-shell structure, magnetic moment due to presence of Mn and radio-opacity due to presence of Cd in MRI. The ZnO/MgO core/shell quantum dots are developed for biological application due to lesser toxicity.

(2) Solid-State Lighting: Currently working on a solid-state lighting project “High efficiency organic light emitting diode (OLED) with down conversion phosphors” funded by Office of Energy Efficiency and Renewable Energy. Three key issues will be addressed: (1) improvement of the power efficiency of blue emitting devices by incorporating electrical dopants in the charge transporting layers; (2) enhancement of the light out-coupling efficiency with microcavity structures, and (3) down-conversion of blue light to white light with phosphors. My responsibility to this project is to synthesize phosphor materials, characterization of phosphors and production of white light by down-converting blue light.

Publications

1. D. Bera, L. Qian, P.H. Holloway, “Enhanced luminescence from novel ZnO/MgO core/shell Quantum dots” (In Preparation).

2. L. Qian, D. Bera, P.H. Holloway, “White light emission from single layer PVK PLED by mixing singlet and triplet excimer emissions” J. Chem. Phys. (in review)

3. L. Qian, D. Bera, P.H. Holloway, “Effect of UV light irradiation on poly-(vinylcarbazole)” Chem. Mater. (in review)

4. D. Bera, S.V.N.T. Kuchibhatla, S. Azad, L. Saraf, C.M. Wang, V. Sutthanandan, P. Nachimuthu, D.E. McCready, M.H. Engelhard, O.A. Marina, D.R. Baer, S. Seal, S. Thevuthasan, “Growth and characterization of highly oriented gadolinia-doped ceria (111) thin films on zirconia (111)/sapphire (0001) substrate” Thin solid films (in review)

5. L. Qian, D. Bera, Z.-S. Jin, Z.-L. Du, Z. Xu, F. Teng, W. Liu, ”Influence of dehydrated nanotubed titanic acid on charge transport and luminescent properties of polymer light-emitting diodes with fluorescent dye“ Solid State Comm. (In press), 2007.

6. D. Bera, L. Qian, S. Sabui, S. Santra, P.H. Holloway, “Optical properties of ZnO quantum dots produced by a solution-based synthesis process” Opt. Mater. (in press), 2007.

7. C. Drake, S. Deshpande, D. Bera, S. Seal. “Metallic nanostructured mateials-based sensors” Inter. Mater. Rev. (in press) 2007.

8. L. Qian, D. Bera, P.H. Holloway, “Electrophosphorescence from trilet excimers in poly-(n-vinylcarbazole), Appl. Phys. Letts. 90, p 103511 1-3, 2007.

9. S.V.N.T. Kuchibhatla, A.S. Karakoti, D. Bera, S. Seal. “One dimensional nanostructured materials” Prog. Mater. Sci. 52, p699-913, 2007.

10. A. Karakoti, R. Filmalter, D. Bera, S.V.N.T. Kuchibhatla, A. Vincent, S. Seal, “Spiral growth of one dimensional titania nanostructures using anodic oxidation” J. Nanosci. Nanotech., 6, 2084-2089, 2006.

11. D. Bera, J.P. Perrault, H. Heinrich, S. Seal, “Defect studies on as synthesized and purified carbon nanostructures produced by arc-discharge in solution process” J. Nanosci. Nanotech., 6, p1084-1091, 2006.

12. D. Bera, G. Johnston, H. Heinrich, S. Seal, “A parametric study on the synthesis of carbon nanotubes through arc-discharge in water”, Nanotechnology, 17, p1722-1730, 2006.

13. D. Bera, S. Patil, K. Scammon, S. Seal, “Diffusion limited growth of FTO-nanofilm coated tin fractals” Electrochem. Solid-State Letts., 8(10), p D31-D34, 2005.

14. D. Bera, S.C. Kuiry, Z. Rahman, S. Seal, “Template-assisted deposition of palladium nanoarrays: Preparation, microscopic and spectroscopic studies” J. Electrochem. Soc., 152(8), p C566-C570, 2005.

15. D. Bera, E. Brinley, S.C. Kuiry, M. McCutchen, H. Heinrich, S. Seal, “Optoelectronic Automated System for Arc-discharge in Solution to Synthesize Carbon Nanotubes” Rev. Sci. Instrum., 76, p033903 1-6, 2005.

D. Bera, S.C. Kuiry, M. McCutchen, H. Heinrich, Grady C. Slane, S. Seal, “In-situ synthesis of carbon nanotubes decorated with palladium nanoparticles using arc-discharge in solution method J. Appl. Phys., 96, p5152-5157, 2004.

17. D. Bera, S.C. Kuiry, M. McCutchen, A. Kruize, H. Heinrich, M. Meyyappan, S. Seal, “In-situ Synthesis of Palladium Nanoparticles Carbon Nanotubes using Arc-discharge in Solution” Chem. Phys. Letts., 386, p364-368, 2004.

18. D. Bera, S.C. Kuiry, S.Seal, “Using Template-assisted Electrodeposition to synthesize Nanostructured materials” JOM, 56 (1), p49-53, 2004.

19. D. Bera, S.C. Kuiry, S.Seal, “Kinetics and Growth of Electrodeposited Palladium Nanocrystallites” J. Phys. Chem. B, 108, p556-562, 2004.

20. D. Bera, S.C. Kuiry, S. Patil, S.Seal. “Palladium Nanoparticles Arrays Using Template-assisted Electrodeposition", Appl. Phys. Letts., 82 (18), p3089-3091, 2003.

Conference Proceeding

1. P.H. Holloway, H. Yang, H. Lee, S. Seo, S. Santra, L. Qian, D. Bera, “Nanophosphor: PL, EL, and Biological Markers” Proceeding of 3^rd International Symposium on Display & Lighting Phosphor Materials, ISDLPMW’06, Yokohama, Japan, (9 Dec. 2006)

2. P.H. Holloway, H. Yang, H. Lee, S. Seo, S. Santra, L. Qian, D. Bera, “Nanophosphor: PL, EL, and Biological Markers” Proceeding of 13^th International Display Workshops, IDW’06 Otsu, Japan, (6-8 Dec. 2006)

3. D. Bera, P.H. Holloway, H. Yang, “Efficient photostable ZnS-passivated CdS:Mn Qdots” Proceeding of SOTAPOCS-XVI, Joint International Meeting, 210^th Meeting of Electrochemical Society (ECS) and XXI Congreso de la Sociedad Mexicana de Eletroquimica, Vol 3 (5), Cancun, Mexico, (29^th Oct -3^rd Nov 2006).

4. D. Bera, A. Anal, B.T. Rao, T.R.R. Mohan, “Synthesis of silicon penta-coordinate complex as a precursor for processing glass and glass ceramics”; Proceedings of the 28th International Annual meeting of Powder Metallurgy Association of India, PM 02, New Delhi, India, (22-24^th January 2002).

Book Chapter

D. Bera, L. Qian, P. H. Holloway “Phosphor quantum dots and their optical applications” In “Luminescent materials and applications” Ed. A. Kitai, John Wiley & Sons. West Sussex, UK

Conference Presentation

1. P.H. Holloway, H. Yang, H. Lee, S. Seo, S. Santra, L. Qian, D. Bera, “Nanophosphor: PL, EL, and Biological Markers” Proceeding of 3^rd International Symposium on Display & Lighting Phosphor Materials, ISDLPMW’06, Yokohama, Japan, (9 Dec. 2006)

2. P.H. Holloway, H. Yang, H. Lee, S. Seo, S. Santra, L. Qian, D. Bera, “Nanophosphor: PL, EL, and Biological Markers” Proceeding of 13^th International Display Workshops, IDW’06 Otsu, Japan, (6-8 Dec. 2006)

3. D. Bera, P.H. Holloway, H. Yang, “Efficient photostable ZnS-passivated CdS:Mn Qdots” Proceeding of SOTAPOCS-XVI, Joint International Meeting (210^th Meeting of Electrochemical Society (ECS) and XXI Congreso de la Sociedad Mexicana de Eletroquimica), Cancunn, Mexico, (29^th Oct -3^rd Nov 2006).

4. H. Yang, S. Seo, D. Bera, L. Qian, P.H. Holloway, “Effects of interfacial facial barriers on electroluminescence from hybrid organic-nanocrystalline devices” 13^th International Workshop on Inorganic and Organic Electroluminescence & 2006 International conference on Science and Technology on Emissive Displays and Lighting, EL 2006, Jeju, Korea (18-22 Sep 2006)

5. D. Bera, H. Yang, S. Santra, G.A. Walter, P.H. Holloway, “Gd(III)-functionalized quantum dots for the development of multimodal bio-imaging probe” (Poster Presentation) South East Regional Interdisciplinary Symposium (SERIS), Gainesville, Florida, (19-21 May 2006).

6. D. Bera, K. Filmalter, S. Patil, S. Seal, S. Deshpande, “Diffusion-limited FTO nanofilm coated Tin fractals during anodization” American Ceramic Society, Cocoa Beach Florida (Feb 2006).

7. D. Bera, S. Patil, S. Seal, “Diffusion limited Growth of FTO-coated Tin fractals” Poster presentation, TMS conference, San Francisco, (Feb 2005).

8. D. Bera, S. Seal, A. Azad, C.M. Wang, V. Shutthanandan, D.E. McCready, M.H. Engelhard, S. Thevuthasan, “Growth and characterization of highly oriented pure and Gd₂O₃ doped CeO₂ (111) on ZrO₂(111)/ Al₂O₃ (0001) system” presentation at MRS Fall meeting 2004, Boston, (30th Nov ’04).

9. D. Bera, S.C. Kuiry, S. Seal, “Fundamental Insights into the Kinetics and Growth of Electrodeposited Palladium Nanocrystallites” Presentation at 206th Electrochemical Society Meeting at Honolulu Hawaii (3rd October 2004).

10. D. Bera, S. Seal, “Synthesis of Arrays of Palladium Nanoparticles through Template-Assisted Electrodeposition” (Poster presentation) Surface Analysis ’04, organized AVS and PNNL, Richland, Washington 16^th June 2004.

11. D. Bera, S. C. Kuiry, M. McCutchen, S. Seal, “Synthesis of Carbon Nanotubes Filled with Nanoparticles Using Arc Discharge in Solution” Presentation at 205^th Electrochemical Society Meeting at San Antonio TX (10^th May 2004).

12. D. Bera, S.C. Kuiry, S. Patil, S.Seal, “Template Assisted Electrodeposition of Palladium Particles” Presented at 204^th Meeting (Orlando) of Electrochemical Society (ECS), Orlando, Florida, October 12-17, 2003.

13. M. McCutchen, D. Bera, S.C. Kuiry, S. Seal, “Synthesis of Palladium Nanoparticles Carbon Nanotubes using Arc-discharge in Solution” Presented at 204^th Meeting (Orlando) of Electrochemical Society (ECS), Orlando, Florida, October 12-17, 2003.

14. D. Bera, S.C. Kuiry, S. Patil, S.Seal. “Palladium Nanoparticles Arrays Using Template-assisted Electrodeposition", Annual Joint Symposium of American Vacuum Society (AVS) and Florida Society of Microscopy, Orlando, Florida, 17-18^th March 2003.

15. D. Bera, S. Seal; “Template Assisted Electrodeposition of Palladium Arrays”, 2003 AESF SUR/FIN Conference, Midwest Airlines Center, Milwaukee, Wisconsin, June 23-26, 2003.

16. D. Bera, A. Anal, B.T. Rao, T.R.R. Mohan, “Synthesis of silicon penta-coordinate complex as a precursor for processing glass and glass ceramics”; Powder Metallurgy Association of India "PM 02", New Delhi; India, 22-24^th January 2002.