Joseph A. Akkara
DMR Division of Materials Research
MPS Directorate for Mathematical & Physical Sciences
Start Date:
August 1, 2002
Expires:
July 31, 2007 (Estimated)
Awarded Amount to Date:
$1105632
Investigator(s):
Richard Haglund richard.haglund@vanderbilt.edu (Principal Investigator)
Charles Lukehart (Co-Principal Investigator) Michael Aziz (Co-Principal Investigator) Leonard Feldman (Co-Principal Investigator)
Sponsor:
Vanderbilt University
Division of Sponsored Research
NASHVILLE, TN 37235 615/322-2631
NSF Program(s):
CERAMICS, SOLID STATE & MATERIALS CHEMIS, DMR SHORT TERM SUPPORT, NANOSCALE: INTRDISCPL RESRCH T, CATALYSIS AND BIOCATALYSIS, PHYSICS-OTHER
Field Application(s):
0106000 Materials Research
Program Reference Code(s):
AMPP, 9162, 1767, 1674, 1589, 1586
Program Element Code(s):
1774, 1762, 1712, 1674, 1401, 1248
ABSTRACT
This proposal was submitted in response to the solicitation "Nanoscale Science and Engineering" (NSF 01-157). This research project aims to explore: 1) the nature of structure-property changes or phase transitions that occur in solid materials in response to temperature, pressure, electromagnetic fields or mechanical strain; 2) the size dependence of phase transitions in oxide nanocrystals, focusing on electronic and lattice dynamics during the phase transition; 3) the effects of interfacial energy and strain; and 4) the influence of pressure, temperature, impurity doping and defect density on phase stability. These studies will produce a multi-dimensional phase diagrams for nanoscale oxide materials. In addition to training graduate students and postdoctoral scholars in advanced research techniques relevant both to science and technology, the combination of chemistry, materials science and physics research issues will provide an intellectually rich educational environment. The project brings together a multi-institutional team of faculty, postdoctoral scholars and graduate students from chemistry, materials science and physics to explore nanoscale materials and their possible uses in technology. Outreach through Vanderbilt University's Explorations Web site will showcase this NSF project for the general public. Connections to the Owen Graduate School of Management will couple into the rapidly growing business interests in nanoscience and nanotechnology.
Understanding structural phase transformations in oxide nanocrystals is important to the development of a number of important materials technology areas that include catalysis, separation technologies, phosphor materials, thin-film electronics, photonics, and environmental remediation. Students trained in these areas will compete very favorably for jobs in high priority areas of interest to the academic, industrial, and government laboratory sectors. This project is co-supported by the Division of Materials Research, the Chemistry Division, the Physics Division, and the Chemical and Transport Systems Division.
PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH
J. Y. Suh, R. Lopez, L. C. Feldman, R. F. Haglund, Jr.. "Semiconductor to metal phase transitions in the nucleation and growth of VO2
nanoparticles and thin films," Journal of Applied Physics, v.96, 2004, p. 1209.
Jepsen, PU; Fischer, BM; Thoman, A; Helm, H; Suh, JY; Lopez, R; Haglund, RF. "Metal-insulator phase transition in a VO2 thin film observed with terahertz spectroscopy," PHYSICAL REVIEW B, v.74, 2006.
Karakurt, I; Boneberg, J; Leiderer, P; Lopez, R; Halabica, A; Haglund, RF. "Transmission increase upon switching of VO2 thin films on microstructured surfaces," APPLIED PHYSICS LETTERS, v.91, 2007.
L. C. Feldman, G. Luepke, N. H. Tolk, R. Lopez, R. F. Haglund, Jr., T. E. Haynes and L. A. Boatner. ""Particle-Solid Interactions and 21st Century Materials Science"," Nuclear Instruments and Methods in Physics Research B, v.212, 2003, p. 1209.
Lopez, R; Boatner, LA; Haynes, TE; Haglund, RF; Feldman, LC. "Switchable reflectivity on silicon from a composite VO2-SiO2 protecting layer," APPLIED PHYSICS LETTERS, v.85, 2004, p. 1410-1412.
Lopez, R; Haglund, RF; Feldman, LC; Boatner, LA; Haynes, TE. "Optical nonlinearities in VO2 nanoparticles and thin films," APPLIED PHYSICS LETTERS, v.85, 2004, p. 5191-5193.
M. Rini, A. Cavelleri, R. W. Schoenlein, R. Lopez, L. C. Feldman, R. F. Haglund, Jr., L. A. Boatner, T. E. Haynes. ""Ultrafast response of the surface plasmon resonance in vanadium dioxide nanorods"," Optics Letters, v.30, 2004, p. 558.
R. F. Haglund, Jr., R. Lopez, J. Y. Suh, L. A. Boatner, L. C. Feldman, T. E. Haynes. "Synthesis of vanadium dioxide nanocrystals by ion-beam lithography and pulsed laser
deposition," Proceedings of the SPIE, v.5339, 2004, p. 601.
R. Lopez, L. C. Feldman and R. F. Haglund, Jr.. ""Size-dependent properties of VO2 nanoparticle arrays"," Physical Review Letters, v.93, 2004, p. 117403.
R. Lopez, L. C. Feldman, R. F. Haglund, Jr., T. E. Haynes, L. A. Boatner. "Comparison of optical nonlinearities in VO2 nanoparticles and thin films," Applied Physics Letters, v.85, 2004, p. 5191.
R. Lopez, T. E. Haynes, L. A. Boatner, R. F. Haglund, Jr., L. C. Feldman. ""Switchable reflectivity on silicon from composite VO2-SiO2 protecting layer"," Applied Physics Letters, v.85, 2004, p. 1410.
Ramaswamy, V; Haynes, TE; White, CW; MoberlyChan, WJ; Roorda, S; Aziz, MJ. "Synthesis of nearly monodisperse embedded nanoparticles by separating nucleation and growth in ion implantation," NANO LETTERS, v.5, 2005, p. 373-377.
Rini, M; Cavalleri, A; Schoenlein, RW; Lopez, R; Feldman, LC; Haglund, RF; Boatner, LA; Haynes, TE. "Photoinduced phase transition in VO2 nanocrystals: ultrafast control of surface-plasmon resonance," OPTICS LETTERS, v.30, 2005, p. 558-560.
