Reactive Growth of Nanoscale MgO Films by Mg Atom Deposition onto O2Multilayers

2004 ◽  
Vol 108 (31) ◽  
pp. 11666-11671 ◽  
Author(s):  
Jooho Kim ◽  
Z. Dohnálek ◽  
J. M. White ◽  
Bruce D. Kay
Keyword(s):  
Nanoscale Mgo

Size-Controlled Synthesis of MgO Nanoparticles and the Assessment of Their Bactericidal Capacity

2013 ◽  
Vol 1547 ◽  
pp. 135-140 ◽  
Author(s):  
Yarilyn Cedeño-Mattei ◽  
Myrna Reyes ◽  
Oscar Perales-Pérez ◽  
Félix R. Román
Keyword(s):  
Average Crystallite Size ◽  
Cost Effective ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
Mgo Nanoparticles ◽  
E Coli ◽  
Mechanism Of Inhibition ◽  
Crystallite Sizes ◽  
Nanoscale Mgo ◽  
Size Controlled

ABSTRACTThe present work focuses on the development of a reproducible and cost-effective size-controlled synthesis route for nanoscale MgO and the preliminary assessment of its bactericide capacity as a function of crystal size. Nanoscale MgO was produced through the thermal decomposition of Mg-carbonate hydrate precursor (hydromagnesite) synthesized in aqueous phase. The exclusive formation of the MgO phase, with an average crystallite size between 7 and 13 ± 1 nm, was evidenced by X-Ray Diffraction and HRTEM analyses. Fourier Transform – Infrared spectroscopy confirmed the evolution of the precursor into the desired MgO structure. The bactericidal tests were conducted by measuring the optical density at 600 nm of E. coli in presence of MgO nanoparticles of specific sizes. MgO nanocrystals with average crystallite sizes of 13nm inhibited bacterial growth up to 35% at 500 mg MgO/L. The mechanism of inhibition could be attributed to the formation of superoxide species on the MgO surface.

Temperature dependence of the voltage-controlled perpendicular anisotropy in nanoscale MgO|CoFeB|Ta magnetic tunnel junctions

2014 ◽  
Vol 104 (11) ◽  
pp. 112410 ◽  
Author(s):  
Juan G. Alzate ◽  
Pedram Khalili Amiri ◽  
Guoqiang Yu ◽  
Pramey Upadhyaya ◽  
Jordan A. Katine ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Tunnel Junctions ◽  
Magnetic Tunnel Junctions ◽  
Perpendicular Anisotropy ◽  
Nanoscale Mgo

scholarly journals Frequency Converter Based on Nanoscale MgO Magnetic Tunnel Junctions

2009 ◽  
Vol 2 (12) ◽  
pp. 123003 ◽  
Author(s):  
Benoit Georges ◽  
Julie Grollier ◽  
Akio Fukushima ◽  
Vincent Cros ◽  
Bruno Marcilhac ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Frequency Converter ◽  
Magnetic Tunnel Junctions ◽  
Nanoscale Mgo

Spin transfer induced coherent microwave emission with large power from nanoscale MgO tunnel junctions

2008 ◽  
Vol 93 (2) ◽  
pp. 022505 ◽  
Author(s):  
D. Houssameddine ◽  
S. H. Florez ◽  
J. A. Katine ◽  
J.-P. Michel ◽  
U. Ebels ◽  
...  
Keyword(s):  
Tunnel Junctions ◽  
Spin Transfer ◽  
Microwave Emission ◽  
Large Power ◽  
Nanoscale Mgo

scholarly journals Three-dimensional vectorial imaging of surface phonon polaritons

Science ◽  
2021 ◽  
Vol 371 (6536) ◽  
pp. 1364-1367
Author(s):  
Xiaoyan Li ◽  
Georg Haberfehlner ◽  
Ulrich Hohenester ◽  
Odile Stéphan ◽  
Gerald Kothleitner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Scanning Transmission Electron Microscope ◽  
Beam Position ◽  
Design And Optimization ◽  
Surface Phonon ◽  
Surface Phonon Polaritons ◽  
Scanning Transmission ◽  
Phonon Polaritons ◽  
Nanoscale Mgo ◽  
3D Information

Surface phonon polaritons (SPhPs) are coupled photon-phonon excitations that emerge at the surfaces of nanostructured materials. Although they strongly influence the optical and thermal behavior of nanomaterials, no technique has been able to reveal the complete three-dimensional (3D) vectorial picture of their electromagnetic density of states. Using a highly monochromated electron beam in a scanning transmission electron microscope, we could visualize varying SPhP signatures from nanoscale MgO cubes as a function of the beam position, energy loss, and tilt angle. The SPhPs’ response was described in terms of eigenmodes and used to tomographically reconstruct the phononic surface electromagnetic fields of the object. Such 3D information promises insights in nanoscale physical phenomena and is invaluable to the design and optimization of nanostructures for fascinating new uses.

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