Archive for February, 2012

Sloppy, Winkler, Taheri and colleagues publish in Journal of Electronic Materials

Posted in News on February 28th, 2012 by admin – Comments Off on Sloppy, Winkler, Taheri and colleagues publish in Journal of Electronic Materials

Jennifer Sloppy, Christopher Winkler, and Dr. Taheri’s latest paper, titled “LaAlO3 / SrTiO3 epitaxial heterostructures by atomic layer deposition,” has been published in the Journal of Electronic Materials.

From the abstract: “Thin films of LaAlO3 were deposited on TiO2-terminated (100) SrTiO3 crystals by atomic layer deposition (ALD), using tris(iso-propylcyclopentadienyl)lanthanum and trimethyl aluminum precursors. Water was used as the oxidizer. The film composition was shown to be controlled by the ratio of La/Al precursor pulses during ALD, with near-stoichiometric LaAlO3 resulting at precursor pulse ratios of 4/1 to 5/1. Films near the stoichiometric LaAlO3 composition were shown to crystallize on subsequent annealing to form epitaxial LaAlO3/SrTiO3 heterostructures. . .”

The paper can be viewed directly here.

The paper can also be accessed on Springer’s website at Journal of Electronic Materials.

Taheri awarded NSF CAREER grant for corrosion studies

Posted in News on February 21st, 2012 by admin – Comments Off on Taheri awarded NSF CAREER grant for corrosion studies

Dr. Taheri has been awarded an NSF CAREER Grant to study the relationship between grain boundary character and corrosion on the atomic scale. This prestigious grant will be disbursed over five years and provides $400,000 to support research in the group.

From the abstract, “The objective of this Faculty Early Career Development (CAREER) Program award is to develop an understanding of the atomic scale grain boundary structure dependence of corrosion enhancing precipitation in fcc metals. Corrosion has a devastating effect on many industries, including nuclear, naval ship structures, and off-shore wind turbines. Grain boundary engineering has been shown to improve boundary dependent properties including creep, intergranular stress corrosion, embrittlement, and fatigue. However, questions remain about the anisotropic nature of both the segregation and precipitation relevant to all sensitization dependent failure in fcc materials. . .”

For more information, see the award posting.

Spurgeon awarded APS travel grant

Posted in News on February 21st, 2012 by admin – Comments Off on Spurgeon awarded APS travel grant

Steven Spurgeon has been awarded the FGSA Travel Award for Excellence in Graduate Research from the American Physical Society, Forum on Graduate Student Affairs. He will be using the $500 award to attend the 2012 Intermag Conference in Vancouver, Canada. The conference gathers magnetics experts from around the world to showcase the latest innovations in the field.

For more information on the APS Forum on Graduate Student Affairs (FGSA), see: http://www.aps.org/units/fgsa/

For more information on the Intermag 2012, see: http://intermagconference.com/2012/

Spurgeon publishes research highlight on multiferroic tunnel junctions in MRS Bulletin

Posted in News on February 21st, 2012 by admin – Comments Off on Spurgeon publishes research highlight on multiferroic tunnel junctions in MRS Bulletin

Steven Spurgeon has published a new research highlight in the Materials Research Society Bulletin‘s February 2012 issue. The article describes work by researchers attempting to design tunnel junctions based on polarization switching of a ferroelectric.

From the article: “Quantum mechanical tunneling across an insulating barrier is the basis for the operation of magnetic tunnel junctions and other novel memories. However, current memory designs are hampered by poor resistance switching ratios and high power consumption. This problem could potentially be overcome by use of a ferroelectric tunnel barrier material which promises high OFF/ON resistance ratios with lower power consumption. Meeting this challenge, an international research group has recently described the design of a ferroelectric tunnel junction with exceptional tunneling electroresistance that may compete with traditional nonvolatile memories. . .”

The article can be viewed directly here or on the Materials Research Society Bulletin website.

The paper discussed in this article is available at Nature Nanotechnology.

DCG students participate in Philly Materials Science & Engineering Day

Posted in News on February 4th, 2012 by admin – Comments Off on DCG students participate in Philly Materials Science & Engineering Day

Scotto Materials Day

DCG students Chris Barr, Chris Winkler, Michael Jablonski, Dan Scotto D’Antuono, Andrew Lang, and Steven Spurgeon participated in this year’s second annual Philly Materials Science and Engineering Day on February 4th. Hosted by Drexel and the University of Pennsylvania, Materials Day gives the public the chance to attend exciting lectures, demonstrations, and tours about materials science.

Michael showed kids how to make liquid nitrogen ice cream, while Chris Barr and Dan demonstrated glassy transitions in chilled sporting equipment. Chris and Dan also helped visitors make their own “bouncy” balls to demonstrate viscoelastic behavior. Andrew, Chris Winkler, and Steven guided visitors through tours of Drexel’s Centralized Research Facilities and demonstrated the operation of different electron microscopes.

This year’s Philly Materials Science & Engineering Day was a great success, with a large turnout from all over the Philadelphia area. For more information about the day’s events, visit: www.phillymaterials.org