Materials Literature
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This paper presents the design and fabrication of batch-processed cantilever probes with electrical shielding for scanning microwave impedance microscopy. The diameter of the tip apex, which defines the electrical resolution, is less than 50 nm. The width of the stripline and the thicknesses of the insulation dielectr…
The production of multiple types of graphene, such as free standing, epitaxial graphene on silicon carbide and metals, graphene in solution, chemically grown graphene-like molecules, various graphene nanoribbons, and graphene oxide with different levels of reduction and various chemical composition, demonstrate the ne…
In this paper we used Raman spectroscopy to investigate the optical properties of vanadium dioxide (VO2) thin films during the thermally induced insulating to metallic phase transition. We observed a significant difference in transition temperature in similar VO2 films grown on quartz and sapphire substrates: the film…
The tremendous increase in the use of engineered nanoparticles in daily life has raised concerns about their impact on the environment and in biological systems. Among them, silver-containing material is of high industrial interest and of manifold use in consumer products, mainly because of their antimicrobial activit…
Nowadays, thanks to the electrospinning process, polymeric fibers in nanoscale diameters (10–500 nm) are easily producible. During the last decade, the electrospinning technique has been greatly investigated and developed. One of the most important fields of study on the electrospinning process is the influence of eff…
Considering the widespread presence of electromagnetic interferences (EMI), it is necessary to develop new electromagnetic wave (EM) absorbing materials with low reflection coefficient and large operating frequency band. The well-known EM absorbing materials have a microstructure combining a low permittivity phase wit…
Die inneren Werte zählen: Über eine templatfreie Solvothermalsynthese wurden gleichförmige VO2-Mikrokügelchen mit unterschiedlichen komplexen Innenstrukturen hergestellt, darunter Mehrschalen- und „Dotter-Schale“-Hohlstrukturen. Nach Tempern an Luft zeigen die erhaltenen V2O5-Mikrokügelchen eine verbesserte elektroche…
By using density functional theory, we investigated the reactivity and electronic sensitivity of pristine and structurally manipulated BC 2 N nanotubes (BC 2 NNT) to a HCN molecule. It was mainly found that (i) the pristine BC 2 NNT can weakly adsorb the HCN with adsorption energy of −1.1 kcal/mol, and its electronic…
A newly developed method of producing nanofibers, called forcespinning, has proven to be a viable alternative to mass produce nanofibers. Unlike electrospinning, the most common method currently being employed (which draws fibers through the use of electrostatic force), forcespinning utilizes centrifugal forces which…
Although surfactants have been widely used to tailor the size, shape, and surface properties of nanocrystals and control the pore size and phases of mesoporous frameworks, the use of surfactants as reaction media to grow chalcogenide crystals is unprecedented. In addition, compared with ionic liquids, surfactants are…
The electronic structure of Cu(2)O and CuO thin films grown on Cu(110) was characterized by X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The various oxidation states, Cu(0), Cu(+), and Cu(2+), were unambiguously identified and characterized from their XPS and XAS spectra. We show tha…
Getting a charge out of microspheres: Uniform VO2 microspheres with various complex interiors, such as yolk-shelled and multi-shelled hollow structures, have been synthesized through a template-free solvothermal method. After annealing in air, the derived V2O5 microspheres manifest improved electrochemical performance…
The very sharp first-order phase transition in single-crystal BaTiO3 permits thermal changes to be driven by very small electric fields. The resulting giant electrocaloric strength could be exploited in future cooling devices that operate at high frequency.
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ABSTRACT The GaMnN and GaMnN: O films were obtained by annealing at different NH 3 flow rates. When the NH 3 flow rate was decreased to 20 sccm, the oxygen was co‐doped into GaMnN film and substituted the few host atoms, which were confirmed by the X‐ray Photoelectron Spectra. Moreover, the oxygen co‐doping in GaMnN f…
Rußvergiftung: Die erhöhte chemische Aktivität, die durch moderne Dieselmotoren auf den emittierten Ruß übertragen wird, ist ein unerwünschter Nebeneffekt der modifizierten Motorenkonstruktion. Dadurch werden Euro-IV- und Euro-VI-Ruße chemisch und biologisch sehr aktiv und gefährlich. Unter Berücksichtigung dieser Tat…
Klicken und schalten: Eine neue Familie von Azobenzolen wurde entwickelt, die geeignete Substituenten für die wässrige Staudinger-Bertozzi-Ligation an Azide enthalten. Die entstehenden Photochrome zeigen ein stabiles und reversibles Schaltverhalten in Wasser, mit einem photostationären Zustand (PSS) bis zu 95:5 cis/tr…
This paper describes the reaction of a Poly(propylene)imine hexadecylamine dendrimer (DAB-Am-16) with methyl acrylate.The modified dendrimer obtained (DKMA) was characterized by vibrational spectroscopy, nuclear resonance magnetic ( 13 C), thermogravimetry and scanning electron microscopy.The dielectric properties of…
Abstract In order to best assess the importance of new technologies to optical design, it is useful to consider what the limits are to what can be done with ‘old’ technologies. That may show where something new is needed to overcome the limitations of existing optical designs. This article will give a survey of some r…
We investigate the quantum evolution of spin states of a single molecular magnet in a local electric field. The decoherence of a $\texttt{\{}\emph{Cu}_3\texttt{\}}$ single molecular magnet weakly coupled to a thermal bosonic environment can be analyzed by the spin-boson model. Using the finite-temperature time-convolu…