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The coupling of the magnetic and ferroelectric order in multiferroics produces new excitations of mixed magnetic (magnons) and lattice (phonons) character ; electro-magnons. The investigation of these novel excitations as has revealed that they are activated only through symmetric Heisenberg exchange, even in systems in which the static polarization arises from the relativistic antisymmetric exchange.

A physical hypothesis based on theory and ab initio modeling for the stamping of graphene and few layers graphene (FLG) on silica is presented, and the feasibility of site-specific stamping of FLG patterns is demonstrated experimentally (figure below shows 10-layer FLG pattern stamped on silica). The site-specific nature of the patterned stamps over large areas could enable high-throughput fabrication of future graphene-based integrated devices.

Students from Trenton, NJ participated in PCCM's Princeton University Materials Academy (PUMA), learning about materials science and engineering related to energy sustainability. Working with PCCM faculty Wole Soboyejo and Craig Arnold and their graduate students, the PUMA high school students built their own solar ovens and solar cells from readily available materials, while a guest speaker shared her firsthand experience of the impact of solar cookers in economically and politically devastated regions of the world.

The dynamics of entangled polymer solutions far from equilibrium is, at present, a subject of considerable interest because the "natural" modifications to tube or reptation-based theories have not been successful.Â’  In such systems, polymer molecules are highly entangled, which results in the motion o

The spontaneous growth of whiskers from Pb-free Sn solder films on Cu substrates poses a serious threat to the reliability of electronic circuits. Researchers at Brown are using experiments and computer simulations to understand the mechanisms for the formation of Sn whiskers. As part

Approach: Recruited nine highly-talented students (four female, two from underrepresented

Researchers, Dmitri Talapin and collaborators, at the University of Chicago MRSEC have been studying electronic properties of new nanoscale materials consisting of both magnetic and semiconducting components (FePt and PbS).Â’  These components are integrated into individual nanostructures forming multicomponent quantum-confined objects.Â’  The core-shell morphology maximizes the interaction between the components and provides a convenient platform for studying

To advance the application of organic molecular films in solar cells, PCCM researchers have improved their conductivity and carrier injection by n-doping the acceptor layer in a donor-acceptor cell. The acceptor was a fullerene layer, C60, while the dopant was the low-ionization-energy molecule decamethylcobaltocene (CoCp2*).

A collaboration between researcher supported by the DOE and NSF-MRSEC's at UC Santa Barbara and UMASS Amherst, and IBM has led to a revolutionary chip breakthrough that promises to be used in every future microelectronic device.