Materials Literature
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The use of temperature and time dependent material parameters is state-of-the-art in mechanical engineering. An advanced measurement method for the determination of moisture dependent parameters for micro and nano scale samples was developed. In combination with FE-analysis, this tool (involving time, temperature, and…
In this paper a previously proposed configuration of a Jerusalem cross frequency selective surface (JC-FSS) is optimized for operation in the 2.4 GHz ISM band. The new feature introduced in this paper is the addition of superstrate layer on top of the FSS. In practice the added layer accounts for the substrate of an a…
A copper target in supercritical CO 2 was ablated using nanosecond Nd:YAG laser pulses for a variety of different laser irradiation times, temperatures and pressures. The irradiated copper surface was evaluated by scanning electron microscopy and laser microscopy. Experiments were also conducted in atmospheric conditi…
Diatoms responsible for harmful events in other geographic areas, found in the coastal waters of the San Matías Gulf (Río Negro Province, Argentina), were studied.Materials were collected in two sampling stations related to natural banks and cultures of bivalves: Las Grutas and Piedras Coloradas.Two potentially toxige…
We review the field of positron transport physics in gases, starting with a historical overview. In particular, experiments which have measured positron drift velocities and mobilities in specially constructed cells are highlighted. The relevance of understanding positron transport in current efforts to manipulate tra…
In this work, superconducting samples of (Bi1.6Pb0.4)Sr2CaCu2O8+δ +3 wt.%Ag have been studied and compared with Ag free samples, (Bi1.6Pb0.4)Sr2CaCu2O8+δ , and with Ag and Pb free ones, Bi2Sr2CaCu2O8+δ . It has been found that Pb doped samples present a worse texture when compared with the undoped ones, resulting in a…
In this work we describe the analgesic, anti-inflammatory and toxic activities as well as the phytochemical profile of the ethanol extract from Tabernaemontana catharinensis A. DC. (Apocynaceae) stem bark. Analgesic evaluation was carried out against chemical and thermal stimuli. Anti-inflammatory activity was investi…
Occurrence of magnetic order on the basis of plutonium can be captured by LDA+U calculations. Systematic investigation of diverse Pu compounds reveals that the 5f occupancy plays a key role. If the 5f states are populated by more than approximately 5.3 electrons, the Pu magnetism vanishes. For comparison with valence-…
Spectra of possible phonon states, as well as thermodynamic characteristics of nanocrystals (ultrathin film and quantum wire) of simple cubic crystalline structure are analyzed in this paper, using the method of two-time dependent Green functions. From energy spectra and internal energy of the system the thermal capac…
The first-line treatment of ovarian cancer is based on cytoreductive surgery and the use of anticancer drugs. The main disadvantage in the usage of anticancer drugs is the wide capacity of cancer cells to acquire a resistance to chemotherapeutic agents and therefore new treatment strategies have to be developed and te…
We discuss scaling the equivalent oxide thickness (EOT) of Hf-based high- k gate dielectrics by post-deposition annealing (PDA). Thin HfON/SiON gate stacks with EOT=0.57 nm were successfully formed by repeating ultra thin (0.6 nm) HfO 2 deposition and high-temperature (950 °C) PDA on a previously formed SiON interfaci…
The scale-up synthesis of H 2 O 2 from H 2 /O 2 via a dielectric barrier discharge (DBD) under ambient conditions was studied. A plasma reactor consisting of multiple parallel DBD tubes was designed to scale up the H 2 O 2 synthesis. The number of tubes had no significant effect on the discharge mode, and no decay occ…
Abstract A homologous series of new surface‐active 1,1‐bis{[3‐(N,N‐dimethylamino)ethyl]‐amido}alkane‐di‐N‐oxides were synthesized in the reaction of an appropriate diethyl 2‐alkylmalonate with N,N‐dimethylethylenediamine followed by oxidation with an aqueous solution of hydrogen peroxide. The adsorption isotherms of t…
Abstract A dichromate‐selective PVC‐membrane electrode based on Quinaldine Red (an acridinium derivative) is described. The electrode exhibits rapid (< 30 s) and linear response to the activity of Cr(VI) anions in the range of 5.2 × 10−6 −1.0 × 10−1 M dichromate with the limit of detection 2.5 × 10−6 Mof Cr2O72−. The…
We report a novel instrument for synchrotron-based in situ x-ray scattering measurements during injection molding processing. It allows direct, real-time monitoring of molecular-scale structural evolution in polymer materials undergoing a complex processing operation. The instrument is based on a laboratory-scale inje…
Vertically oriented nanowires (NWs) of single-crystalline wurtzite GaN have been fabricated on γ-LiAlO2 (100) substrate coated with a Au layer, via a chemical vapor deposition process at 1000 °C using gallium and ammonia as source materials. The GaN NWs grow along the nonpolar [10 $$ \bar 1 $$ 0] direction with steepl…
Using a double-layered gate insulator [SiO 2 (100 nm)/Al 2 O 3 (10 nm)] and a dry-etching process for the channel layer, we could obtain high mobility top-gate SnO 2 and ZnO–SnO 2 (ZTO) transparent thin-film transistor (TTFT). After annealing at 300 °C, for 1 h in O 2 ambient, the saturated mobility of SnO 2 TTFT was…
Analysis of experimental data reveals a regular relation between Poisson’s ratio and plastic characteristics of inorganic glasses.
Optical foveated imaging using liquid crystal (LC) spatial light modulators (SLMs) has received considerable attention in recent years as a potential approach to reducing size and complexity in fast wide-angle lenses. We cover a theoretical study quantifying the diffraction efficiency and image quality of foveated opt…
Molecular dynamics (MD) simulations of amyloid beta peptide have been performed in aqueous solutions of trifluoroethanol with different concentrations. The amount of α-helical secondary structure increases when going from pure water to trifluoroethanol-rich solutions. The conformation obtained in 40% (v/v) trifluoroet…