Polaronic exciton in self-organized assemblies of protonated meso -tetraphenylporphine dimers and water at room temperature

2016 ◽  
Vol 1125 ◽  
pp. 522-531 ◽  
Author(s):  
Alexander V. Udal’tsov
Keyword(s):  
Room Temperature ◽  
Self Organized ◽  
Organized Assemblies

scholarly journals Materials for Future Quantum Dot-Based Memories

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
T. Nowozin ◽  
D. Bimberg ◽  
K. Daqrouq ◽  
M. N. Ajour ◽  
M. Awedh
Keyword(s):  
Cross Sections ◽  
Room Temperature ◽  
Storage Time ◽  
Thermal Emission ◽  
Current Status ◽  
Strong Electron ◽  
Self Organized ◽  
Hole Confinement ◽  
Storage Times ◽  
Capture Cross Sections

The present paper investigates the current status of the storage times in self-organized QDs, surveying a variety of heterostructures advantageous for strong electron and/or hole confinement. Experimental data for the electronic properties, such as localization energies and capture cross-sections, are listed. Based on the theory of thermal emission of carriers from QDs, we extrapolate the values for materials that would increase the storage time at room temperature to more than millions of years. For electron storage, GaSb/AlSb, GaN/AlN, and InAs/AlSb are proposed. For hole storage, GaSb/Al0.9Ga0.1As, GaSb/GaP, and GaSb/AlP are promising candidates.

From precipitation to vesicles: a study on self-organized assemblies by alkylammonium and its mixtures in polar solvents

2001 ◽  
Vol 279 (12) ◽  
pp. 1245-1249 ◽  
Author(s):  
X.-R. Zhang ◽  
J.-B. Huang ◽  
M. Mao ◽  
S. H. Tang ◽  
B.-Y. Zhu
Keyword(s):  
Polar Solvents ◽  
Self Organized ◽  
Organized Assemblies

Observation of unusual temperature-dependent stripes in LiTaO3and LiTaxNb1−xO3crystals with near-zero birefringence

2010 ◽  
Vol 43 (6) ◽  
pp. 1305-1313 ◽  
Author(s):  
A. M. Glazer ◽  
Nan Zhang ◽  
Ausrine Bartasyte ◽  
D. S. Keeble ◽  
S. Huband ◽  
...  
Keyword(s):  
Phase Transition ◽  
Room Temperature ◽  
Paraelectric Phase ◽  
Microscopy Study ◽  
Vapour Transport ◽  
Temperature Dependent ◽  
Paraelectric Phase Transition ◽  
Optical Birefringence ◽  
Self Organized ◽  
Li Content

A birefringence imaging microscopy study of LiTaO3and some mixed LiTaxNb1−xO3crystals is reported. The initially congruent LiTaO3crystals have been subject to vapour transport equilibration in order to increase the Li content and at the same time to reduce the optical birefringence close to zero at room temperature. In both types of crystal, the presence of unusual periodic self-organized stripes, existing over large distances, has been observed, which correlate with the well documented cleavage and twin planes in this material. Furthermore, the stripes become narrower as the temperature is changed away from the zero-birefringence temperature, but become temperature-independent above the ferroelectric–paraelectric phase-transition temperature.

Room temperature self-organized gold nanoparticles materials for embedded electronic devices

2012 ◽  
Vol 24 (1) ◽  
pp. 376-381 ◽  
Author(s):  
Chun-Chi Chen ◽  
Hsin-Chiang You ◽  
Edward Yi Chang ◽  
Fu-Hsiang Ko
Keyword(s):  
Gold Nanoparticles ◽  
Room Temperature ◽  
Electronic Devices ◽  
Self Organized

scholarly journals Silica hybrid nanocomposites

2006 ◽  
Vol 4 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Georgi Chernev ◽  
Bisserka Samuneva ◽  
Petar Djambaski ◽  
Isabel Salvado ◽  
Helena Fernandes
Keyword(s):  
Electrostatic Interactions ◽  
Room Temperature ◽  
Sol Gel ◽  
Hybrid Nanocomposites ◽  
Chemical Bonds ◽  
Self Organized ◽  
Nanobuilding Blocks ◽  
Different Types ◽  
Ft Ir ◽  
Inorganic Components

AbstractIn this work we present experimental results about the formation, properties and structure of sol — gel silica based biocomposite containing Calcium alginate as an organic compound. Two different types of silicon precursors have been used in the synthesis: tetramethylortosilicate (TMOS) and ethyltrimethoxysilane (ETMS). The samples have been prepared at room temperature. The hybrids have been synthesized by replacing different quantitis of the inorganic precursor with alginate. The structure of the obtained hybrid materials has been studied by XRD, IR Spectroscopy, EDS, BET and AFM. The results proved that all samples are amorphous possessing a surface area from 70 to 290 m2/g. It has also been established by FT IR spectra that the hybrids containing TMOS display Van der Walls and Hydrogen bonding or electrostatic interactions between the organic and inorganic components. Strong chemical bonds between the inorganic and organic components in the samples with ETMS are present. A self-organized nanostructure has been observed by AFM. In the obtained hybrids the nanobuilding blocks average in size at about 8–14 nm for the particles.

1.5 μm Range Self-Organized In0.65Ga0.35As/In0.52Al0.48As Quantum Wire Structures Grown on (775)B-Oriented InP Substrates by Molecular Beam Epitaxy

2002 ◽  
Vol 744 ◽  
Author(s):  
K. Hyodo ◽  
Y. Ohno ◽  
H. Kanamori ◽  
T. Kitada ◽  
S. Shimomura ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Quantum Wire ◽  
Room Temperature ◽  
Molecular Beam ◽  
Polarization Degree ◽  
Self Organized ◽  
Best Value ◽  
Inp Substrate ◽  
Inp Substrates ◽  
Quantum Well Layer

ABSTRACTHigh quality quantum wire (QWR) structures with an emitting wavelength in the 1.5-μm range were self-organized in an In0.65Ga0.35As/In0.52Al0.48As quantum well layer grown on a (775)B-oriented InP substrate by molecular beam epitaxy. Photoluminescence (PL) from the (775)B In0.65Ga0.35As/In0.52Al0.48As QWRs with a nominal well width of 4.8 nm was observed at 1.43 μm at 12 K, which corresponds to a PL wavelength of about 1.5 μm at room temperature. The PL peak was considerably polarized along the wire direction with a polarization degree of P [= (I∥ - I⊥) / (I∥ + I] ⊥)] = 0.14, indicating its good one-dimensionality. The FWHM of the PL peak was as small as 17 meV, which is the best value for InGaAs QWRs on InP substrates.

SUPERSTRIPES

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3289-3297 ◽  
Author(s):  
A. BIANCONI
Keyword(s):  
Critical Temperature ◽  
Fermi Level ◽  
Critical Point ◽  
Room Temperature ◽  
Quantum Critical Point ◽  
Single Electrons ◽  
Self Organized ◽  
Atomic Limit ◽  
De Broglie Wavelength ◽  
Short Time

A superconducting superlattice of quantum stripes with a particular shape that gives the amplification of the critical temperature is called "superstripes". This superlattice is characterized by: a) the metallic stripe width L of the order of the de Broglie wavelength of electrons at the Fermi level, L ~λ F , and b) the hopping of pairs between the stripes larger than the hopping of single electrons. "Superstripes" can be realized artificially to get new room temperature superconductors (RTS). This particular mesoscopic heterostructure at the atomic limit has been found as a self organized network of charges, in a short time and space scale, in doped cuprate perovskites near the micro-strain quantum critical point for "superstripes" formation.

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