2,856 research outputs found
Pressure effects on the superconducting thin film BaKFeAs
We report electrical resistivity measurements on a high-quality
BaKFeAs thin film () under pressure. The
superconducting transition temperature (=39.95 K) of the optimally-doped thin
film shows a dome shape with pressure, reaching a maximal value 40.8 K at 11.8
kbar. The unusually high superconducting transition temperature and its
anomalous pressure dependence are ascribed to a lattice mismatch between the
LaAlO substrate and the thin film. The local temperature exponent of the
resistivity () shows a funnel shape around
the optimal pressure, suggesting that fluctuations associated with the
anomalous normal state are responsible for high-temperature superconductivity.Comment: To appear in Appl. Phys. Let
An investigation of the role the donor moiety plays in modulating the efficiency of ‘donor-π-acceptor-π-acceptor’ organic DSSCs
Three ‘D-π-A-π-A’ based dyes have been synthesized featuring MeO-, MeS- and Me2N- as donor residues and benzothiadiazole and cyanoacrylic acid residues as acceptor units. UV–vis spectroscopy, solution electrochemistry and DFT modelling indicated that the Me2N- residue has the most significant effect on optical and redox properties of a photosensitizer. DSSCs with the Me2N- functionalized dye gave the highest power conversion efficiency of the series (η = 5.61%), presumably due to the better donor ability of this unit, which promotes more effective intramolecular charge transfer (ICT) characteristics
Bioinformatics challenges in molecular epidemiology of cancers
Molecular epidemiology is the integration of molecular biologic techniques into epidemiologic study. With the advances in understanding of carcinogenesis and the human genome, there has been an evolution in the field of cancer epidemiology. However, traditional analyses of single genetic variants often fail to identify susceptibility genes for cancer risk. In particular, recent technological evolution has enabled high-throughput analyses for a number of genetic variants and driven accumulation of unprecedentedly large genome data, imposing bioinformatics challenges. These studies aim to integrate the genetic basis of complex diseases including cancers in which the interplay of multiple genetic and environmental risk factors may play an important role. Here we outline currently available approaches for detecting variants of cancer risk. We also review upcoming bioinformatics challenges and technical aspects in the field of molecular epidemiology, and discuss their future impact on the understanding of carcinogenesis and personalized strategies for cancer prevention and therapy
Design and Implementation of Reader Baseband Receiver Structure in a Passive RFID Environment
- …