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Electric polarization as a bulk quantity and its relation to surface charge
A definition of the electric polarization of an insulating crystalline solid is given in terms of the centers of charge of the Wannier functions of the occupied bands. The chang...
Observation of Weak Localization of Light in a Random Medium
We report the observation of weak localization of light in a random medium. In a sample consisting of a highly concentrated suspension of polystyrene particles in water, polariz...
Engineering exosomes for targeted drug delivery
Exosomes are cell-derived nanovesicles that are involved in the intercellular transportation of materials. Therapeutics, such as small molecules or nucleic acid drugs, can be in...
Solution of 'Solvable model of a spin glass'
Abstract The Sherrmgton-Kirkpatrick model of a spin glass is solved by a mean field technique which is probably exact in the limit of infinite range interactions. At and above T...
Single Molecules Observed by Near-Field Scanning Optical Microscopy
Individual carbocyanine dye molecules in a sub-monolayer spread have been imaged with near-field scanning optical microscopy. Molecules can be repeatedly detected and spatially ...
Self-Doped Ti<sup>3+</sup> Enhanced Photocatalyst for Hydrogen Production under Visible Light
Through a facile one-step combustion method, partially reduced TiO(2) has been synthesized. Electron paramagnetic resonance (EPR) spectra confirm the presence of Ti(3+) in the b...
Two-dimensional metal–organic framework nanosheets: synthesis and applications
Synthesis and applications of two-dimensional metal–organic framework nanosheets and their composites are summarized.
Surface modification of superparamagnetic magnetite nanoparticles and their intracellular uptake
Superparamagnetic magnetite nanoparticles were surface-modified with poly (ethylene glycol) (PEG) and folic acid, respectively, to improve their intracellular uptake and ability...
Complex alloy structures regarded as sphere packings. I. Definitions and basic principles
Complex alloy structures, particularly those of transition metals, are considered as determined by the geometricnl requirements for sphere packing. A characteristic of the class...