Materials Literature
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Optical and electric properties in Zr-doped In2O3 epitaxial layers were systematically investigated. The films at Zr concentrations of 0.3–0.5at.% are found to be superior transparent conductive oxides in transparency in near infrared wavelength region and Hall mobility compared to Sn-doped In2O3. Maximum mobilities a…
Photophysical properties of semiconductor nanocrystal quantum dots (QDs) are primary determinants of their efficacy as fluorescence probes in biological systems. Our minimally passivated core/shell/shell QDs are smaller than the QDs with thick polymer coats that are often used for cellular probes, permitting less rest…
Giving lanthanides a new twist: The chiral nonaaza macrocycle L wraps tightly around lanthanide(III) ions in a helical fashion (see picture). The all-R enantiomer of the macrocycle, LRRRRRR, forms kinetically controlled complexation products of M helicity (100 % de), which undergo inversion to the P diastereomer (90 %…
A method, which is especially useful for the study of ferroelectric nanowire with piezoresponse force microscopy (PFM), was developed. In this method electric bias is directly applied on the axial direction of nanowire. The axial poling and switching of single crystalline BaTiO3 nanowire were realized, and hysteresis…
We present molecular dynamics simulations of the slow dynamics of a mixture of large and small soft spheres with a large size disparity. The dynamics are investigated in a broad range of temperature and mixture composition. As a consequence of the large size disparity, large and small particles exhibit very different…
The origin of the diradical character dependence of the second hyperpolarizability (gamma) of neutral singlet diradical systems is clarified based on the perturbation formula of gamma using the simplest diradical molecular model with different diradical characters, i.e., H2 under bond dissociation. The enhancement of…
Mycothiol (MSH) (acetyl-Cys-GlcN-Ins) is the major low-molecular-mass thiol in Mycobacterium tuberculosis. MSH has antioxidant activity, can detoxify a variety of toxic compounds, and helps to maintain the reducing environment of the cell. The production of MSH provides a potential novel target for tuberculosis treatm…
Aligned piezoelectric (PZT) nanofibres were fabricated by electrospinning using PZT sol–gel as precursor. A pure perovskite phase with an average grain size of 10 nm was obtained at 650 °C. The average diameter of these fibres could be controlled to range from 52 to 150 nm by varying the concentration of poly(vinyl py…
Polymers are among the major hallmarks of 20th-century science, and the explosive outgrowth and tremendous importance of polymeric foams is a testament to their amazing versatility and unique properties. With applications from automotive to acoustic and medical, polymeric foams pervade all areas of our lives. If this…
The ability to acquire iron from the extracellular environment is a key determinant of pathogenicity in mycobacteria. Mycobacterium tuberculosis acquires iron exclusively via the siderophore mycobactin T, the biosynthesis of which depends on the production of salicylate from chorismate. Salicylate production in other…
Abstract Fluorescent self‐assembled liquid gels have been prepared for the first time through the use of a gelator showing aggregation‐induced enhanced emission. The photoluminescence, arising from the fibrous aggregates of the gelator, can be repeatedly switched by an electric field. Modulating the excitation light t…
The authors report the suspension and movement of ferrofluid droplets on superhydrophobic surfaces in the presence of strong external magnetic fields. The system allows the quantitative evaluation of friction between droplet and substrate surface. It represents an enabling example for the development of microferroflui…
We present the results of detailed site-selective spectroscopy performed on the $^{4}I_{15∕2}\ensuremath{\leftrightarrow}^{4}I_{13∕2}$ transition of ${\mathrm{Er}}^{3+}:{\mathrm{Y}}_{2}\mathrm{Si}{\mathrm{O}}_{5}$ at $1.5\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{m}$. New determinations of the $^{4}I_{13∕2}$ a…
The authors report spin polarization (P) and tunneling magnetoresistance (TMR) of epitaxially grown Co2FeSi thin films on a MgO (001) substrate. A Heusler-type L21 structure was observed in the samples sputter deposited at 473K or above. The P value of the ordered film was measured as 0.49±0.02 by the point contact An…
A sensor for thermal and thermodynamic measurements of small magnetic systems have been designed and built. It is based on a 5μm-thick suspended polymer membrane, which has a very low heat capacity (≈ 10-6 J/K at nitrogen temperature), and on which a heater and a highly sensitive thermometer are deposited. The sensor…
It all gels well: Amphiphilic donor–acceptor-substituted butadienes undergo spontaneous concentration-dependent self-assembly into highly fluorescent vesicles and gels. The vesicles and gels exhibit light-induced destruction and self-repair as a result of the photochromic nature of the butadiene chromophore.
A successful 3D tissue-engineering scaffold must have a highly porous structure and good mechanical stability. High porosity and optimally designed pore size provide structural space for cell accommodation and migration and enable the exchange of nutrients between the scaffold and environment. Poly(epsilon-carprolacto…
The present contribution reports, for the first time, the successful fabrication of α-chitin whisker-reinforced poly(vinyl alcohol) (PVA) nanocomposite nanofibres by electrospinning. The α-chitin whiskers were prepared from α-chitin flakes from shrimp shells by acid hydrolysis. The as-prepared chitin whiskers exhibite…
Phosphors of LaAlGe2O7 doped with Tm3+ and Er3+ of high color purity, exhibiting a narrow band emission in the blue and green regions, were obtained. (La1−xLnx)AlGe2O7 (Ln=Tm,Er) powders are bright emitters, with chromaticity color coordinates that are comparable to or better than those of standard phosphors for displ…
This letter reports measurements of microwave (up to 4.5GHz) detection in metallic single walled carbon nanotubes. The measured voltage responsivity was found to be 114V∕W at 77K. The authors also demonstrated heterodyne detection at 1GHz. The detection mechanism can be explained based on standard microwave detector t…