Materials Literature
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The photoluminescence of mercaptoacetic acid (MAA)-capped CdSe/ZnSe/ZnS semiconductor nanocrystal quantum dots (QDs) in SKOV-3 human ovarian cancer cells is pH-dependent, suggesting applications in which QDs serve as intracellular pH sensors. In both fixed and living cells the fluorescence intensity of intracellular M…
Abstract Hierarchical carbon materials with functional groups residing at the surface are prepared for the first time by using nanostructured silica materials as templates in combination with hydrothermal carbonization at mild temperatures (180 °C). Different carbon morphologies (e.g., macroporous casts, hollow sphere…
A comparative study of antimicrobial activity is done using three different electrospun nanofibers namely-CA, PAN, and PVC used as control and with various amounts of AgNO(3) being treated with UV-irradiation leading to the enhancement of silver nanoparticles. DMF is used as the common solvent which helps to undergo s…
Co-electrospinning is ideally suited for fabricating continuous fibers encasing materials within a polymer sleeve, but requires relatively complex coannular nozzles. A single-nozzle co-electrospinning technique is demonstrated using blends of poly(methyl methacrylate) (PMMA)/polyacrylonitrile (PAN) solutions in dimeth…
Plasmon-resonant gold nanorods, which have large absorption cross sections at near-infrared frequencies, are excellent candidates as multifunctional agents for image-guided therapies based on localized hyperthermia. The controlled modification of the surface chemistry of the nanorods is of critical importance, as issu…
Magnetic nanoparticles with appropriate surface coatings are increasingly being used clinically for various biomedical applications, such as magnetic resonance imaging, hyperthermia, drug delivery, tissue repair, cell and tissue targeting and transfection. This is because of the nontoxicity and biocompatibility demand…
Fining and homogenization of melts during batch melting is closely related to the redox reaction of polyvalent element M (M:Sb, As etc), M (x+n)+ +n/2O 2? → M x+ +n/4O₂. In this study, square wave voltammetry (SWV) measurements were performed to examine the redox behavior of an antimony ion in cathode ray tube (CRT) g…
Miscibility behavior of blends of isotactic and syndiotactic poly(methyl methacrylate) (iPMMA and sPMMA) was investigated as a function of annealing temperature and molecular weight of the iPMMA component. Annealing experiments clearly indicate that for the high molecular weight iPMMA sample formation of stereocomplex…
In the framework of all-electron density functional theory, we present a comparative study of the pure carbon and BC 3 compound nanotubes containing different kinds of topological defects (seven-, eight- and nine-membered rings) under uniaxial tensions. The formation energies of the topological defects for pure carbon…
The objective of this work was to study the transfer of four aroma compounds (ethyl butyrate, ethyl hexanoate, cis-3-hexenol, and benzaldehyde) from a solid and complex-flavored food matrix (sponge cake) toward and through packaging films placed in indirect contact during storage in accelerated aging conditions (38 de…
Abstract The aim of this work is to evaluate the behaviour of bronze in archaeological soil by gravimetric study, electrochemical research and analytic survey. Archaeological soil samples were collected from Jama that date back to the second Punic war. Mineralogical, micro‐structural, micro‐morphological and chemical…
Ferromagnetic material–carbon nanotube composites are promising magnetic nanowires that have recently been prepared, with many possible applications. In this paper, using carbon nanotubes as a nucleate template, one-dimensional carbon nanotube–FexCy nanocrystal composites were successfully synthesized by the chemical…
The existence of sitting-atop metalloporphyrin complexes, the proposed intermediates in the metalation of free-base porphyrins, has been explored via the microscopic reverse reaction, i.e., protonation of metalloporphyrins with a strong acid. The reaction of M(Tp-TP) (M = Zn, Cu, Ni; Tp-TP = dianion of tetra-p-tolylpo…
We present theoretical calculations of an argon bubble in a liquid solution of 85%wt sulfuric acid and 15%wt water in single-bubble sonoluminescence. We used a model without free parameters to be adjusted. We predict from first principles the region in parameter space for stable bubble evolution, the temporal evolutio…
Low-temperature excitations in the magnetic Keplerate molecule ${\mathrm{Fe}}_{30}$ as calculated by linear spin-wave theory (SWT), modified linear SWT, and spin-level mean-field theory (SLMFT) are compared to recent inelastic neutron scattering results by Garlea et al. [Phys. Rev. B 73, 024414 (2006)]. SLMFT reproduc…
The formalism for a linear-response many-body treatment of the electronic contributions to thermal transport is developed for multilayered nanostructures. By properly determining the local heat-current operator, it is possible to show that the Jonson-Mahan theorem for the bulk can be extended to inhomogeneous problems…
Recent research has established the influence of seed nature in determining the final shapes of metallic (Ag, Au) nanocrystals. In this work, we utilize and extend this knowledge to produce anisotropic β-AgI nanoplatelets in high yield: Ag seeds (∼20 nm) with twin defects were first selectively nucleated and then reac…
We have developed a self-consistent technique to predict the behavior of plasmon resonances in multicomponent systems as a function of wavelength. This approach, based on the tight lower bounds of the Bergman-Milton formulation, is able to predict optical data, including the positions, shifts, and shapes of plasmonic…
A detailed density functional theory study of pseudotetrahedral Fe(III/IV)-imido-phosphine complexes has yielded a host of new insights. The calculations confirm dxy(2)dx(2)-y(2)(2)dz(2)(1) (or dδ(2)dδ'(2)dσ(1)) electronic configurations for Fe(III)-imido complexes of this type, as previously proposed, where the z dir…
The oxidation kinetics for $\mathrm{Ni}(111)$ surface and the structure of the oxide layers grown at room temperature were analyzed by high-resolution medium energy ion scattering using isotopically labeled $^{18}\mathrm{O}_{2}$. Initially, the surface showed a reflection high energy electron diffraction (RHEED) patte…