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 Sarah
L. Stoll
Associate
Professor
Department of Chemistry
Georgetown
University
37th
and O Streets NW
Washington,
DC 20057-1227
Office:
652 Reiss Science
Phone: 202-687-5839
Fax: 202-687-6209
E-mail:
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| Lab web site |
http://georgetown.edu/faculty/sls55/Group_Web_Page.html |
Education /
Background |
B.A. 1988
Smith
College cum laude
Ph.D.
1993
U. C. Berkeley, Department of Chemistry
Postdoctoral
Fellow, Harvard University
(1995) and Rice University (1996)
Visiting
Scientist,
Oxford University (1997)
Assistant
Professor
of Chemistry
Oberlin College (1996-2001), promotion with
tenure
2001
Helsinki University of Technology (2002)
Fulbright Fellow (2002), NSF CAREER Award (2005)
[cv] |
| Teaching |
Synthetic Methods, Inorganic Chemistry,
Advanced Topics in Inorganic Chemistry, Environmental
Chemistry
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| Research Interests |
Solid State Inorganic Chemistry and Materials Science. Research in the Stoll Lab involves the synthesis of novel magnetic nanoparticles and inorganic-organic materials with magnetic clusters.
Magnetic nanoparticles are of interest for electronics applications (data storage), biological systems (particularly for separations and MRI), as well as fundamental questions about magnetism on the nanometer length scale. Many of our projects involve the synthesis of novel magnetic nanoparticles or the incorporation of magnetic clusters and nanoparticles in larger superstructures.
1. Nanocrystals of Magnetic Semiconductors. We have been interested in studying size dependent magnetism in magnetic semiconductors. Our model systems are based on lanthanide chalcogenide materials, LnQ, where Ln = lanthanide and Q = O, S, Se, Te. In particular, the europium chalcogenides have magnetic properties that correlate with the electronic energy band gap. Collectively, they cover the full spectrum of magnetic properties from ferromagnetism in EuO and EuS to metamagnetism in EuSe to antiferromagnetism in EuTe. We have identified and characterized single-source precursors for the synthesis of nanoparticles and begun detailed investigations of their magnetic properties as a function of particle size.
2. Thin Films of Mn-12. The magnetic manganese-oxo cluster, known as "Mn-12" (Mn 12O 12Ac 16), has been of interest for its novel magnetic properties including an unusually large spin state, and steps in the magnetization versus field. We have used different organic templates (Self-Assembled Monolayers and polyanions such as PAA) to tessellate Mn-12 on substrates forming monolayer and multilayer thin films. More recently we have developed a method for co-polymerizing the cluster with monomers such as styrene and acrylate.
3. Hydrothermal Synthesis. We have used hydrothermal synthesis to crystallize unusual coordination compounds searching for new materials with optical, electronic or magnetic behavior. We have studied the luminescent properties of materials including the copper halides and cyanides with bifunctional ligands. |
| In the News |
Chemistry Professor
Named CAREER Award Recipient
The National
Science Foundation
(NSF) selected
Georgetown University assistant
professor of chemistry
Sarah L. Stoll as
a 2005 recipient
of the Faculty
Early Career
Development (CAREER)
Program award.
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| Recent
Publications |
Regulacio, M. D.; Pablico, M. H.; Meyers, P. N.; Acay, J.; Tam-Chang, T.-C.; Stoll, S. L. “Luminescence of Lanthanide Dithiocarbamate Complexes”, submitted to J. Am. Chem. Soc.
Regulacio, M. D.; Lewis, B.; Bussman, K.; Stoll, S.L., “Magnetic Properties of Lanthanide Chalcogenide Semiconducting Nanoparticles” J. Am. Chem. Soc.2006, 128, 11173-11179. [ View Publication ]
Regulacio, M. D.; Tomson, N.; Stoll, S. L., “Dithiocarbamate Precursors to lanthanide Monochalcogenide Materials” Chem. Mat.2005, 17(12), 3114-3121. [ View Publication ]
Niinisto, J.; Putkonen, M.; Niinisto, L.; Stoll, S.L.; Kukli, K.; Sajavaara, T., Leskela, M., “Cp 2Hf(CH 3) 2 as an Atomic Layer Deposition Precursor for HfO 2 Thin Films”, J. Mater. Chem., 2005, 15, 2271-2275. [ View Publication ]
Steckel, J. S.; Persky, N. S.; Martinez, C. R.; Barnes, C. L.; Fry, E. L.; Kulkarni, J.; Burgess, J. D.; Pachero, R. B.; Stoll, S. L.; “Monolayers and Multilayers of [Mn 12O 12(O 2CMe) 16]” Nano Letters, 2004,4(3), 399-402. [ View Publication ]
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page last updated:
August 17, 2008 |
