Browsing Physics by Title
Now showing items 1608-1627 of 2105
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Rearrangement and elimination of ordered surface layers of crystalline bubble structures due to gas diffusion
(2009)We describe a hitherto unknown self-organising effect in wet crystalline bubble structures exposed to air. Due to the escape of gas from the bubbles in the top surface layer, bubbles shrink and create space for the bubbles ... -
Red giant mass-loss : studying evolved stellar winds with FUSE and HST / STIS
(Trinity College (Dublin, Ireland). School of Physics, 2006)The changes that a star undergoes during the dying process are the most dramatic of its lifetime. These changes result in the most important interactions between a star and its environment, indeed it is in this area of ... -
Reduced low frequency noise in electron beam evaporated MgO magnetic tunnel junctions
(2010)We compare low frequency noise in magnetic tunnel junctions with MgO barriers prepared by electron-beam evaporation with those prepared by radiofrequency sputtering, both showing a high tunneling magnetoresistance. The ... -
Reexamination of magnetic isotope and field effects on adenosine triphosphate production by creatine kinase
(2012)The influence of isotopically enriched magnesium on the creatine kinase catalyzed phosphorylation of adenosine diphosphate is examined in two independent series of experiments where adenosine triphosphate (ATP) concentrations ... -
Reflectance anisotropy spectroscopy of Fe3O4(110): Anisotropic strain
(2018)We present a study of (110)-terminated magnetite using a range of surface-sensitive techniques, the foremost of those being reflectance anisotropy spectroscopy (RAS). The anisotropic optical response of the as-polished and ... -
Reflectance anisotropy spectroscopy of magnetite (110) surfaces
(2014)Reflectance anisotropy spectroscopy (RAS) has been used to measure the optical anisotropies of bulk and thin-film Fe3O4(110) surfaces. The spectra indicate that small shifts in energy of the optical transitions, ... -
Reflectance anisotropy spectroscopy of Si(111)-(3 x 1)Li and Ag surfaces
(2013)The Si(111)-(3 × 1)Li and Ag surface structures consist of Si honeycomb chains separated by channels occupied by Li or Ag atoms. The dimerization of neighboring Ag atoms results in a larger c (12 × 2)Ag superstructure. ... -
Reflectance anisotropy spectroscopy of Si(111)-(3×1)Li and Ag surfaces
(2013)The Si(111)-(3?1)Li and Ag surface structures consist of Si honeycomb chains separated by channels occupied by Li or Ag atoms. The dimerization of neighboring Ag atoms results in a larger c(12?2)Ag superstructure. We report ... -
Reflection-mode scanning near-field optical microscopy: Influence of sample type, tip shape, and polarization of light
(American Institute of Physics, 1998)A reflection-mode aperture-type scanning near-field optical microscope (R-SNOM) based on the external collection of the reflected light is presented. The light detection is based on an elliptical mirror setup, with the tip ... -
Regional and temporal variations in tissue sodium concentration during the acute stroke phase
(2012)A technique for noninvasively quantifying the concentration of sodium (23Na) ions was applied to the study of ischemic stroke. 23Na-magnetic resonance imaging techniques have shown considerable potential for measuring ... -
Reinforcement in melt-processed polymer-graphene composites at extremely low graphene loading level
(2014)We have prepared polymer nanocomposites reinforced with exfoliated graphene layers solely via melt blending. For this study polyethylene terephthalate (PET) was chosen as the polymer matrix due to its myriad of current and ... -
Reinforcement of macroscopic carbon nanotube structures by polymer intercalation: The role of polymer molecular weight and chain conformation
(2005)Novel polymer nanotube composites were fabricated by intercalating poly vinylpyrrolidone into Buckypaper from solution. This was carried out for both low 10k g/mol and very high 1.3M g/mol molecular weight polymers. ... -
Reinforcement of macroscopic carbon nanotube structures by polymer intercalation: The role of polymer molecular weight and chain conformation
(American Physical Society, 2005)Novel polymer nanotube composites were fabricated by intercalating poly(vinylpyrrolidone) into Buckypaper from solution. This was carried out for both low (10k g?mol) and very high (1.3M g?mol) molecular weight polymers. ... -
Reinforcement of metal with liquid-exfoliated inorganic nano-platelets
(2013)We have prepared metal matrix composites (MMCs) of a pewter alloy filled with liquid-exfoliated Molybdenum Telluride (MoTe2) nano-platelets. The combination of MoTe2 and pewter was chosen due to their near-identical ... -
Relating the optical absorption coefficient of nanosheet dispersions to the intrinsic monolayer absorption
(2016)The concentration of nanosheet suspensions is an important technological parameter which is commonly measured by optical spectroscopy, using the absorption coefficient to transform absorbance into concentration. However, ... -
Relation between grain shape and fractal properties in random Apollonian packing with grain rotation
(2008)We extend the common theme of random Apollonian packing of circles to consider orientable grains with a noncircular shape. Systems of up to 106 grains are examined for a range of polygonal and elliptical shapes using ... -
Relationship between material properties and transparent heater performance for both bulk-like and percolative nanostructured networks
(2014)Transparent heaters are important for many applications and in the future are likely to be fabricated from thin, conducting, nanostructured networks. However, the electrical properties of such networks are almost always ... -
The relationship between network morphology and conductivity in nanotube films
(2008)We have characterized both the direct current conductivity and morphology of a wide range of films made from bundled nanotubes, produced by a selection of commercial suppliers. The conductivity increases with increasing ... -
Reply to ?Comment on `Size-dependent scaling of perpendicular exchange bias in magnetic nanostructures???
(American Physical Society, 2008)Our observation of size-dependent scaling effects at room temperature in exchange-biased multilayers grown onto arrays of polystyrene nanospheres Phys. Rev. B 75, 012413 2007 does not conflict with the observation by ...