ARUNAVA GUPTA MINT Professor MATERIALS and PHYSICAL CHEMISTRY M.Sc.,1976, Indian Institute of Technology; M.A., 1977, Columbia University; Ph.D., 1980, Stanford University. office: 133 Bevill Building, 243B Shelby Hall Telephone: (205) 348-3822 fax PDF version of Dr. Gupta's research interests Gupta Group Home Page affiliations: Center for Materials for Information Technology

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Research Interests

Investigation of nanostructured materials, with emphasis on the controlled fabrication and synthesis of novel structures, manipulating and probing their surface and interface properties, and exploring potential applications. Implementation of a multidisciplinary approach, interfacing chemistry, materials science, physics and biology.

Materials for information technology, in particular spintronics (spin-based electronics). Traditional semi-conductor devices rely on the transport and storage of electronic charge. Spintronics exploits electron spin, creating a new class of devices that can potentially be scaled down to nano-dimensions and can also provide additional functionality. Research goals include: 1) thin film growth utilizing a variety of deposition techniques, including chemical vapor deposition, pulsed laser deposition and sputtering; 2) utilization of a combinatorial approach for depositing and characterizing these films where possible to enable rapid screening of a wide variety of materials; 3) synthesis and characteriza-tion of novel magnetic thin films and heterostructures, in particular oxides, with atomic layer control of the interfaces; 4) fabrication of devices, such as magnetic tunnel junctions and spin-based semiconductors, using these materials for storage, memory and logic functions.

Nanostructured materials for biomedical applications, with emphasis on magnetic oxides. Magnetic nanoparticles represent an extremely interesting group of inorganic materials having a close connection to living systems. They offer exciting possibilities for use in the detection, manipulation and functional control of biomolecules and cells, with potential medical applications in areas such as targeted drug delivery, magnetic fluid hyperthermia and contrast imaging. Research goals emphasize the development of: 1) novel synthetic strategies for the production of various shape nanostructures, including particles, wires, tubes or ribbons; 2) subsequent modification of their surface with coatings to render them biocompatible and enable selective surface immobilization of bioactive molecules.

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Representative Publications

"A Facile Thermolysis Route to Monodisperse Ferrite Nanocrystals." Bao, N.; Shen, L.; Wang, Y.; Padhan, P.; Gupta, A. J Am Chem Soc 129, 12374-12375 (2007).

"Organic Molecule-Assisted Hydrothermal Self-Assembly of Size-Controlled Tubular ZnO Nanostructures." Shen, L.; Bao, N.; Yanagisawa, K.; Domen, K.; Grimes, C. A.; Gupta, A. J. Phys. Chem. C 111, 7280-7287 (2007).

"Direct growth of comet-like superstructures of Au-ZnO submicron rod arrays by solvothermal soft chemistry process." Shen, L.; Bao, N.; Yanagisawa, K.; Zheng, Y.; Domen, K.; Gupta, A.; Grimes, C. A. J. Solid State Chem. 180, 213-220 (2007).

"Size-Controlled Synthesis of Magnetic CuCr₂Se₄ Nanocrystals." Wang, Y.-H. A.; Bao, N.; Shen, L.; Padhan, P.; Gupta, A. J Am Chem Soc 129, 12408-12409 (2007).

“Growth of Epitaxial Thin Films of the Ordered Double Perovskite La₂NiMnO₆ on Different Substrates”, Guo, H.; Burgess, J.; Street, S.; Gupta, A. ; Calvarese, T. G.; and M. A. Subramanian, Appl. Phys. Lett. 89, 022509 (2006).

“Magnetic Anisotropy in Epitaxial CrO₂ and CrO₂/Cr₂O₃ Bilayer Thin Films”, Frey, N. A.; Srinath, S.; Srikanth, H.; Varela, M.; Pennycook, S.; Miao, G. X.; and Gupta, A. Phys. Rev. B 74, 024420 (2006).

“Magnetic Tunnel Junctions Based on CrO₂/SnO₂ Epitaxial Bilayers”, Miao, G. X.; LeClair, P.; Gupta, A.; Xiao, G.; Varela, M.; and Pennycook, S. Appl. Phys. Lett. 89, 022511 (2006).

“Growth and Characterization of Single Crystalline Tin Oxide (SnO₂) Nanowires”, Budak, S.; Miao, G. X.; Ozdemir, M.; Chetry, K. B.; and Gupta, A. J. Crystal Growth 291, 405 (2006).

“Ferromagnetism in Co doped CeO₂: Observation of Giant Magnetic Moment with a High Curie Temperature”, Tiwari, A.; Bhosle, V.; Ramachandran, S.; Sudhakar, N.; Narayan, J.; Budak, S.; and Gupta, A. Appl. Phys. Lett. 88, 142511 (2006).

"A spin triplet supercurrent through the half-metallic ferromagnet CrO₂," Keizer, R. S.; Goennenweign, S. T. B.; Klapwijk, T. M.; Miao, G.; Xiao, G.; Gupta, A., Nature, 439, 825-827, (2006).

Dr. Gupta's complete list of publications (1/6/08)

The University of Alabama Department of Chemistry Faculty