Inorganic Chemistry Seminar
When
Jul 16, 2009 12:00 pm (Thursday)
What
Location: GeoChem Bldg., 351 Calendar: All Public Events Contact: ginni@brown.edu - Ginni McGee Description: "Creating Highly Sought Magnetic Nanoparticles"Chins Chinnasam...
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Event details: Inorganic Chemistry Seminar
Description
Location:
GeoChem Bldg., 351
Calendar:
All Public Events
Contact:
ginni@brown.edu - Ginni McGee
Description:
"Creating Highly Sought Magnetic Nanoparticles"
Chins Chinnasamy, Northeastern University
Nanostructures made of metals and its oxides have received much attention in recent years because of their uses in many areas, including photonics, electronics, biomedicine, magnetic recording media, magnetic refrigeration systems, catalysis, permanent magnets and energy technology. In order to understand their unique properties and further promote their utility, one must fully understand the correlation between chemistry, structure, particle size, shape and processing. Chemical methods have been widely used to produce nanoscale materials due to their straightforward nature with controlled size, shape, composition and crystallinity, which allows one to investigate the relationships between size/structure and physical/chemical properties. Here, we will examine the synthesis strategies for the size and structure controlled metal (Co and Ni), metal alloy nanoparticles (FePt, CoPt, and FeCo) by deciphering the reaction kinetics using the modified polyol process. The shape of the particles could also be controlled since shape can influence the crystal orientation and specifically net magnetic anisotropy. We extended this process to study the effects on the preparation of rare earth (RE) based-Co nanoparticles that shows moderate magnetization and coercivity at room temperature. The results will be discussed in detail.
GeoChem Bldg., 351
Calendar:
All Public Events
Contact:
ginni@brown.edu - Ginni McGee
Description:
"Creating Highly Sought Magnetic Nanoparticles"
Chins Chinnasamy, Northeastern University
Nanostructures made of metals and its oxides have received much attention in recent years because of their uses in many areas, including photonics, electronics, biomedicine, magnetic recording media, magnetic refrigeration systems, catalysis, permanent magnets and energy technology. In order to understand their unique properties and further promote their utility, one must fully understand the correlation between chemistry, structure, particle size, shape and processing. Chemical methods have been widely used to produce nanoscale materials due to their straightforward nature with controlled size, shape, composition and crystallinity, which allows one to investigate the relationships between size/structure and physical/chemical properties. Here, we will examine the synthesis strategies for the size and structure controlled metal (Co and Ni), metal alloy nanoparticles (FePt, CoPt, and FeCo) by deciphering the reaction kinetics using the modified polyol process. The shape of the particles could also be controlled since shape can influence the crystal orientation and specifically net magnetic anisotropy. We extended this process to study the effects on the preparation of rare earth (RE) based-Co nanoparticles that shows moderate magnetization and coercivity at room temperature. The results will be discussed in detail.
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Brown University
Brown was the Baptist answer to Congregationalist Yale and Harvard, Presbyterian Princeton, and Episcopalian Penn and Columbia. At the time, it was the only one that welcomed students of all religious persuasions (following the example of Roger Williams, who founded Rhode Island in 1636 on the same principle). Brown has long since shed its Baptist affiliation, but remains dedicated to diversity and intellectual freedom.Post a Countdown Widget
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