Materials Literature
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We present thermal and electron micrographs of an incandescent lamp constructed from a multiwalled carbon nanotube, and correlate the subwavelength optical information with the underlying nanoscopic structure. Remarkably, the heat equation and Planck's law together give a precise, quantitative description of the light…
A survey of the main interests of high pressure for molecular biophysics highlights the possibility of exploring the whole conformational space using pressure perturbation. A better understanding of fundamental mechanisms responsible for the effects of high pressure on biomolecules requires high-resolution molecular i…
We present the design and fabrication of a novel dual-function subwavelength fused-silica grating that can be used as a polarization-selective beam splitter. For TM polarization, the grating can be used as a two-port beam splitter at a wavelength of 1550 nm with a total diffraction efficiency of 98%. For TE polarizati…
The mechanical treatment of monoclinic zirconia in high energy planetary ball mill reduces the grain size, increases microstrain, causes phase transition to metastable nanostructured tetragonal or cubic phases and produce considerable amounts of amorphous phase. Annealing of ball milled zirconia in chlorine atmosphere…
MOTIVATION: Throughout evolution, homologous proteins have common regions that stay semi-rigid relative to each other and other parts that vary in a more noticeable way. In order to compare the increasing number of structures in the PDB, flexible geometrical alignments are needed, that are reliable and easy to use. RE…
Abstract BACKGROUND: Poly(butylene adipate‐ co ‐terephthalate) (PBAT) has attracted wide interest as a biodegradable polymer. However, its use is restricted in certain applications due to its low melting point. RESULTS: PBAT was treated using γ‐radiation. The radiation features were analyzed using Soxhlet extraction,…
The long-stalked Didymosphenia is capable of forming large blooms and is expanding its range. To better understand the colonization dynamics of this species, we investigated the role of substrate characteristics—rock roughness and biofilm condition—on Didymosphenia colonization in a montane Colorado stream. Rocks diff…
We investigate localized electron and hole states in parabolic quantum dots of biased graphene bilayers in the presence of a perpendicular magnetic field. These quantum dots can be created by means of nanostructured gates or by position-dependent doping, which can create a gap in the otherwise gapless dispersion of a…
Abstract Vollgeladen : Durch nichtkovalente Verankerung von Liposomen auf mehrschichtigen Polymerfilmen mit Cholesterin‐modifizierten Polymeren gelingt die Herstellung von Kapsosomen – Polymerkapseln mit Liposom‐Kompartimenten (siehe Bild). Eine quantitative enzymatische Reaktion bestätigte das Vorliegen einer aktiven…
Large-area gold and silver nanoparticles inside periodical silicon microhole arrays were prepared via simple electrodeposition. Such metal nanoparticles within Si microholes showed a strong surface-enhanced Raman scattering (SERS) effect, which enabled the detection of rhodamine at 10 −8 M and 10 −9 M on substrates of…
Heat capacity, resistivity, and magnetic susceptibility measurements confirm bulk superconductivity in single crystals of ${\text{BaIr}}_{2}{\text{P}}_{2}$ $({T}_{c}=2.1\text{ }\text{K})$ and ${\text{BaRh}}_{2}{\text{P}}_{2}$ $({T}_{c}=1.0\text{ }\text{K})$. These compounds form in the ${\text{ThCr}}_{2}{\text{Si}}_{2…
The magnetic structure of BaFe 2 As 2 was determined from polycrystalline neutron diffraction measurements soon after the ThCr 2 Si 2 -type FeAs-based superconductors were discovered. Both the moment direction and the in-plane antiferromagnetic wavevector are along the longer a -axis of the orthorhombic unit cell. The…
Photoetching of CdTe nanocrystals was applied to thiol-capped CdTe quantum dots (QDs) to control their fluorescence wavelength. CdTe QDs with a high quantum yield (49%) were synthesized in aqueous solution, and they were successfully photoetched in strong alkaline (pH = 13.5) conditions. When monochromatic light was u…
A nanostructured Cd(2)Ge(2)O(6) photocatalyst was successfully prepared by a hydrothermal process. The photocatalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV/vis, N(2) adsorption-desorption, and Fourier transform infrared (FTIR) techni…
Au@Pd nanoparticles (NPs) of size range 4.5−13 nm (⟨ D ⟩ ≈ 7.2 nm) were generated inside the alumina matrix sol without using any additional reducing agent. Partially acetylacetonato (acac) complexed aluminum tri- sec -butoxide has been used to prepare the matrix alumina sol. First, Au NPs of size range 3−9 nm (⟨ D ⟩…
Didymosphenia geminata is a stalk-forming freshwater diatom which was historically found primarily in oligotrophic lakes and streams, but has recently become a nuisance species in many lotic systems worldwide. In the last 5–8 years, D. geminata has become established in Boulder Creek and South Boulder Creek, two regul…
First-principles density-functional theory (DFT) calculations have been used to investigate the crystal structures, thermodynamic stability, and decomposition pathways of Li-Mg-Al-H hydrogen storage compounds. We find that the recently discovered $\text{LiMg}{({\text{AlH}}_{4})}_{3}$ compound is stable with respect to…
The machinability of carbon nanotube (CNT)-reinforced polymer composites is studied as a function of CNT loading, in light of the trends seen in their material properties. To this end, the thermomechanical properties of the CNT composites with different loadings of CNTs are characterized. Micro-endmilling experiments…
We report evidence that paramagnetism in CdSe QDs can be induced via manipulation of the surface chemistry. Using SQUID magnetometry and X-ray absorption spectroscopy, we demonstrate that the paramagnetic behavior of the CdSe QDs can be varied by changing the ligand end-group functionality of the passivating layer. Co…
Normal state optical spectroscopy on single crystals of the new iron arsenide superconductor Ba0.55K0.45Fe2As2 shows that the infrared spectrum consists of two major components: a strong metallic Drude band and a well-separated midinfrared absorption centered at 0.7 eV. It is difficult to separate the two components u…