Transmission electron microcopy (TEM) in both the parallel illumination and scanning probe mode (i.e. STEM) has revealed morphological and structural transformations in self-assembled II-VI, III-V and group IV semiconductor quantum dots (QDs). These transformations result [...]
We propose a mechanism for detection of a single spin center on a non-magnetic substrate. In the detection scheme, the STM tunnel current is correlated with the spin orientation. In the presence of magnetic field, [...]
X-ray absorption spectra of nanoparticles with iron cores and oxide shells, synthesized using the reverse micellar method, were collected at the National Synchrotron Light Source. Comparison of the x-ray absorption near edge structure (XANES) to [...]
Law and Bigelow (Phys.Rev. A58,4791,1998) have proposed a scheme for amplifying an atomic beam as it interacts with a confined alkali-atom condensate. In this scheme the condensate acts as a source for increasing the intensity [...]
We study a scheme for electrical detection of the spin resonance (ESR) of a single electron trapped near a Field Effect Transistor (FET) conduction channel. In this scheme, the resonant Rabi oscillations of the trapped [...]
Laser ablative technology was used to prepare monodisperse nanoparticles (4-20 nm in diameter) of lead zirconate titanate (PZT). Laser ablation of a PZT ceramic target in oxygen ambience produced amorphous and irregularly-shaped PZT nanoparticles. A [...]
During micromanipulation, the influence of gravitational force becomes extremely small. The adhesional force is more significant for smaller objects. An adhered object can be detached by electrostatic interaction. In our earlier study, the electrostatic force [...]
Carbon nanotubes and fullerene have a lot of applicability for industries as nanotechnology. In order to extend its applicability, the computational simulation would be powerful and effective tools for finding and creating new materials and [...]
Graphite/carbon encapsulated metal (GEM) nanoparticles (Fig.1) not only provides an opportunity to study dimensionally confined systems, but also could be used in many nanotechnology applications, e.g. recording media, nano-sized wheel bearings, etc. Unlike other metal [...]
Retinal detachment is estimated to cause 150,000 (in the United States alone) to be blind every year. Many detached retinas occur in older people. It occurs when the vitreous gel that adheres to retina shrinks [...]
Single-walled carbon naotubes of uniform size were produced inside the pore system of cobalt substituted MCM41 mesoporous molecular sieve. Proof of concept has been achieved and preliminary results are reported.
We consider tunneling between electrodes via a microscopic system which can be modeled by the two-level Hamiltonian (a localized spin 1/2 probed by STM or a quantum dot). Measurements of the tunneling current I(t) in [...]
Europium (Eu) ions are already used in significant visual technological applications. We attempted to determine if a silicon nanoparticle (nano-Si) / Europium interaction could occur. The energy transfer from nano-Si to rare earth ions has [...]
, Castro M.
, Castro W.
, Hernandez S.
, Irizarry R.
, Ishikawa Y.
, Mercado L.
, Murillo L.
, Posada B.
, Solá L.
, The University of Puerto Rico at Mayaguez, US
The reduction of Au3+ with SO3-2 is known to lead to the formation of gold nanoculsters and SO4-2 : n Au3+ + SO3-2 à + Aun + SO4-2 equation 1 This reaction is fundamental in [...]
Palladium crystallites with size down to d < 1 nm or were successfully dispersed on silica support and characterized with TEM. A process of hydrogen absorption into the dispersed crystallites were studied by a simultaneous [...]
The compositional inhomogeneity of Pd70Ag30 nanoparticles with the size of 6-7nm was studied by X-ray absorption near edge structure (XANES). The composition of the as-prepared nanoparticles by chemical reduction is inhomogeneous across the diameter due [...]
Here, we introduce a solution chemistry technique which involves a `seeding step` under conditions where nucleation and growth rates of particles are controlled to produce single domain well-crystallized CoFe2O4 nanoparticles followed by a size-selective separation [...]
The ATLAS Collaboration is building a general-purpose pp detector which is design to exploit the full discovery potential of the high energy proton-proton interaction Large Hadron Collider (LHC) at CERN. The LHC offers a large [...]
Journal: TechConnect Briefs
Volume: 3, Technical Proceedings of the 2003 Nanotechnology Conference and Trade Show, Volume 3
Published: February 23, 2003
Industry sector: Advanced Materials & Manufacturing
Topics: Nanoparticle Synthesis & Applications