Yongbing Lou、Xiaobo Chen、Anna Cristina S. Samia 等 4 位作者2003-10-18The Journal of Physical Chemistry B
For the Cu x S system there exists several known solid phases such as Cu 2 S (chalcocite), Cu 1.8 S (digenite), Cu 1.96 S (djurleite), and CuS (covellite). All of these phases have been identified as p-type semiconducting materials due to copper vacancies within the lattice, which is responsible for their usefulness a…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications
Zhenhui Kang、Enbo Wang、Lei Gao 等 7 位作者2003-10-18Journal of the American Chemical Society
At 1 atm pressure, high-quality multiwall carbon nanotubes were synthesized directly from graphite in the absence of catalyst by a one-step water-assisted method.
Advancements in Battery MaterialsCarbon Nanotubes in CompositesGraphene research and applications
Suzana Mali、Maria Victória Eiras Grossmann2003-10-18Journal of Agricultural and Food Chemistry
Yam starch films, formulated with yam starch (4.00 g/100 g of solution) and glycerol (1.30 and 2.00 g/100 g of solution) in filmogenic solution, were employed as packaging to extend storage life of strawberries stored at 4 degrees C and 85% RH. The effects of yam starch films on fruits were compared to the effect of P…
Postharvest Quality and Shelf Life ManagementNanocomposite Films for Food PackagingPlant Physiology and Cultivation Studies
S. A. Studenikin、P. T. Coleridge、N. Ahmed 等 5 位作者2003-10-18arXiv
The magnetoresistance associated with quantum interference corrections in a high mobility, gated InGaAs/InP quantum well structure is studied as a function of temperature, gate voltage, and angle of the tilted magnetic field. Particular attention is paid to the experimental extraction of phase-breaking and spin-orbit…
Mesoscale and Nanoscale PhysicsMaterials Science
Claudia Büchel2003-10-18Biochemistry
Fucoxanthin-chlorophyll proteins were purified from the centric diatom Cyclotella meneghiniana. Two major fractions were observed that differed in their polypeptide composition and oligomeric state. Trimers consist of mainly 18 kDa polypeptides. Higher oligomers are tightly assembled from different trimers, which cont…
Marine and coastal ecosystemsProtist diversity and phylogenyDiatoms and Algae Research
Yong Wang、Jian Feng Wong、Xiaowei Teng 等 5 位作者2003-10-18OpenAlex
This paper describes a general method to drastically improve the dispersity of oleic acid stabilized nanoparticles in aqueous solutions. We use oleic acid stabilized monodisperse nanoparticles of iron oxides and silver as model systems, and have modified the surface properties of these nanoparticles through the format…
Nanoparticle-Based Drug DeliveryGold and Silver Nanoparticles Synthesis and ApplicationsSurfactants and Colloidal Systems
Yan Zhang、Hongwei Gu、Zhimou Yang 等 4 位作者2003-10-18OpenAlex
N-(Fluorenyl-9-Methoxycarbonyl) dipeptides form supramolecular hydrogels via hydrogen bonding and hydrophobic interactions. These hydrogels respond to a ligand-receptor interaction as well as to thermal or pH perturbation and also exhibit chiral recognition.
Supramolecular Chemistry and ComplexesLuminescence and Fluorescent MaterialsSupramolecular Self-Assembly in Materials
Gwang-Hee Kim2003-10-17Physical review. B, Condensed matter
The model describing two coupled single-molecule magnets is considered by including anisotropic exchange interaction in the spin Hamiltonian. The tunnel splittings are calculated perturbationally for arbitrary spin in several selected cases and estimated numerically by using a ${\mathrm{Mn}}_{4}$-dbm as a model system…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Y. Barbotteau、J.L. Irigaray、J.-F. Mathiot2003-10-17Physics in Medicine and Biology
We investigate the relevance of site-bond percolation theory to model the resorption and ossification of natural coral implanted in bones. The first step of the process is the vascularization of the implant seen here as a percolation threshold. The resorption and ossification can thus take place by activation of unocc…
Polymer Surface Interaction StudiesIchthyology and Marine BiologyUnderwater Acoustics Research
Rosa Maria Fernandes Scalvi、Máximo Siu Li、Luis V. A. Scalvi2003-10-17Journal of Physics Condensed Matter
Natural alexandrite (BeAl 2 O 4 :Cr 3+ ) crystals are investigated as regards the effects of annealing on their optical properties. Optical absorption spectra are measured from the ultraviolet (190 nm) to the near infrared (900 nm), for a sample subjected to consecutive annealing processes, where time and temperature…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsMineralogy and Gemology Studies
Christopher W. M. Kay2003-10-17Journal of the American Chemical Society
The photoexcited triplet states of free-base porphyrin (H(2)P) and free-base tetraphenylporphyrin (H(2)TPP) have been investigated by time-resolved electron paramagnetic resonance and electron-nuclear double resonance in a toluene glass at 80 K. Both the zero-field splitting parameters, D and E, and the proton A(zz) h…
Photosynthetic Processes and MechanismsPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Junbing Yang、Liming Dai、Richard A. Vaia2003-10-17The Journal of Physical Chemistry B
In our further investigation on the microfabrication of carbon nanotubes, we found that micropatterns of perpendicular ly a ligned carbon nanotubes can be prepared by simply pressing an adhesively sticky tape (e.g., Scotch tape) prepatterned with a nonadhesive layer onto a nonpatterned aligned carbon nanotube film, fo…
Carbon Nanotubes in CompositesMechanical and Optical ResonatorsAdvanced Materials and Mechanics
Irakli Sikharulidze、B. Farago、Igor P. Dolbnya 等 5 位作者2003-10-17Physical Review Letters
We report combined x-ray photon correlation spectroscopy (XPCS) and neutron spin echo (NSE) measurements of the layer-displacement fluctuations in smectic liquid-crystal membranes in the range from 10 ns to 10 micros. NSE reveals a new regime, determined by bulk elasticity, in which relaxation times decrease with the…
Liquid Crystal Research AdvancementsSpectroscopy and Quantum Chemical StudiesRandom lasers and scattering media
Joanne Deval、Teodoro A. Umali、Esther H. Lan 等 5 位作者2003-10-17Journal of Micromechanics and Microengineering
Fully reconfigurable hydrophobic–hydrophilic surfaces were achieved by reversibly adsorbing and removing avidin from a hydrophobic self-assembled monolayer. The adsorption process was characterized using surface plasmon resonance, while contact angle measurements were used to monitor the resulting wetting behavior. Th…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsElectrowetting and Microfluidic Technologies
Stephen L. Lowe、Charlotte L. Adrian、I. V. Uporov 等 5 位作者2003-10-17Biopolymers
Previous Brownian dynamics (BD) simulations identified specific basic residues on fructose-1,6-bisphophate aldolase (aldolase) (I. V. Ouporov et al., Biophysical Journal, 1999, Vol. 76, pp. 17-27) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) (I. V. Ouporov et al., Journal of Molecular Recognition, 2001, Vol. 1…
Protein Structure and DynamicsAdvanced Proteomics Techniques and ApplicationsEnzyme Structure and Function
D. Mendoza-Anaya、C. Ángeles、P. Salas 等 5 位作者2003-10-17Nanotechnology
The results of transmission electron microscopy and thermoluminescence (TL) studies in silica samples containing Fe and Cu nanosized particles show an important enhancement of their TL response when compared with known reports for pure silica samples. The effect of surface electronic states in the nanoparticles, inter…
Luminescence Properties of Advanced MaterialsCatalytic Processes in Materials ScienceQuantum Dots Synthesis And Properties
Sérgio V. P. Barreira、Fernando Silva2003-10-17Langmuir
The reaction between the arginine's guanidino group and α-dicarbonyl functionalities was used to develop a novel surface modification chemistry. The first modification step consists of the electrostatic adsorption of a poly- l -arginine layer onto ionizable alkanethiol modified gold surfaces. The strongly basic charac…
Polymer Surface Interaction StudiesMolecular Junctions and NanostructuresNanofabrication and Lithography Techniques
Lykourgos Iordanidis、Daniel Bilc、S. D. Mahanti 等 4 位作者2003-10-17Journal of the American Chemical Society
An outstanding example of structural diversity and complexity is found in the compounds with the general formula ABi(3)Q(5) (A = alkali metal; Q = chalcogen). gamma-RbBi(3)S(5) (I), alpha-RbBi(3)Se(5) (II), beta-RbBi(3)Se(5) (III), gamma-RbBi(3)Se(5) (IV), CsBi(3)Se(5) (V), RbBi(3)Se(4)Te (VI), and RbBi(3)Se(3)Te(2) (…
Crystal Structures and PropertiesIron-based superconductors researchInorganic Chemistry and Materials
Maria Cristina Mozzati、Carlo B. Azzoni、Doretta Capsoni 等 5 位作者2003-10-17Journal of Physics Condensed Matter
Electron paramagnetic resonance (EPR) measurements on pure polycrystalline CaCu 3 Ti 4 O 12 have been performed and are discussed within a crystal-field approach. A symmetric signal centred at g = 2.15 is observed for T >25 K, with no evidence of hyperfine structure. At this temperature an antiferromagnetic transition…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsDielectric properties of ceramics
Karl‐Heinz Schweikart、Vladimir L. Malinovskii、Amir A. Yasseri 等 7 位作者2003-10-17Inorganic Chemistry
We report the synthesis of monomers, dimers, trimers, and oligomers of triple-decker (TD) complexes bearing S-acetylthio groups at the termini: AcS-(TD)(n)()-SAc. Each TD was of type (Pc)Eu(Pc)Eu(Por), where H(2)Pc = tetra-tert-butylphthalocyanine and H(2)Por is a meso-tetraarylporphyrin bearing functional groups at t…
Porphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal ComplexesSynthetic Organic Chemistry Methods