Materials Literature
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Optically addressable nanostructured capsules of polyelectrolyte multilayers containing gold nanoparticles are prepared via layer-by-layer colloid templating. The nanocomposite capsule shell, due to the presence of the metal nanoparticles, can be addressed with laser light in the near-infrared (NIR) to induce morpholo…
The formation of high-density silver nanoparticles and a novel method to precisely control the spacing between nanoparticles by temperature are demonstrated for a tunable surface enhanced Raman scattering substrates. The high-density nanoparticle thin film is accomplished by self-assembling through the Langmuir-Blodge…
Highly efficient photon upconversion in solution is demonstrated for the first time. Transparent colloidal solutions of Yb/Er and Yb/Tm doped NaYF4 nanocrystals show bright upconversion emission in the red, green, and blue spectral region by excitation around 1 μm with a laser of moderate power (see Figure). These new…
The comparative study of the excitonic radiative recombination in 2H-MoS2:Cl2 and 2H-WS2:Br2 layered crystals is presented. The steady-state emission spectra of both the investigated materials include two distinct regions. The short-wavelength region consisting of sharp lines is produced by bound excitons, related to…
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The single electron emission behaviors and characteristics from the well-defined quantized energy levels, corresponding to localized electronic states at the dome-structure tips, in single-walled carbon nanotubes (SWNTs) are investigated and illuminated by use of the energy level emission model in combination with the…
Poly(12-dodecalactone) (PDDL) crystals in the form of chain-folded lamellae were prepared by isothermal crystallization from a 1-hexanol solution. The lozenge-shaped crystals with and without spiral growth have been studied by transmission electron microscopy and atomic force microscopy. Wide-angle X-ray diffraction d…
Tandem mass spectrometry is a method of choice for rapid analysis in proteomics. Identification and characterization of proteins from organisms with sequenced genomes is today a routine procedure as will be identification of proteins from organisms with unsequenced genomes with new developing tools. Here, we report th…
It is generally agreed that, in most cases, surfactants are required to obtain stable polymeric nanoparticle dispersions. Here, we report a method which can be used to produce surfactant free yet stable polymeric nanoparticle dispersions. This method is based on explored mechanism of selective solvation of nanoparticl…
The electroluminescence of the light-emitting diodes with five-, ten and 30-fold p-type Ge quantum dots grown on n+ Si substrates is studied. The enhanced integral electroluminescence intensity and blueshift of the 30-fold one at high temperature (>200K) act contrary to those in five- and ten-fold ones. It is a…
We relate the condition for the elliptic shape of the phase diagram of proteins to the degree of correlation in the fluctuations of the changes of enthalpy and volume at the denaturing-refolding transition. Since this degree cannot be larger than 1, hyperbolically shaped diagrams are not likely to exist. Experiments s…
The $1∕3\phantom{\rule{0.3em}{0ex}}\text{monolayer}$ (ML) $\mathrm{Sn}∕\mathrm{Si}(111)\text{\ensuremath{-}}(\ensuremath{\surd}3\ifmmode\times\else\texttimes\fi{}\ensuremath{\surd}3)R30\ifmmode^\circ\else\textdegree\fi{}$ surface structure has been extensively studied using low-energy electron diffraction (LEED) and x…
We have measured the extreme-ultraviolet (EUV) efficiency of a polymer-overcoated blazed ion-etched holographic test grating. The grating had a magnetron-sputtered Mo2C/Si multilayer coating matched to the grating blaze angle of 2.78 degrees. At an angle of incidence of 5.6 degrees and a wavelength of 15.79 nm, the me…
In this work, we studied the flame-retardant (FR) mechanism resulting from an intumescent phenomenon of the FR formulation: polyurethane polymer/ammonium polyphosphate/triazine carbonific (PU/APP/Carbonific). The FR properties (LOI and cone calorimeter) of the system were strongly improved in comparison with the PU an…
The magnetic long range ordering (LRO) and short range ordering (SRO) in β-MnO 2 has been studied by neutron powder diffraction. Below T N =92.5(1) K β-MnO 2 has an incommensurate modulated magnetic LRO with temperature dependent propagation vector length k z . The values of k z show a maximum, corresponding to k z =…
The reactivity of atomic cobalt toward molecular oxygen in rare gas matrices has been reinvestigated. Experiments confirm that Co atoms in their a(4)F ground state are inert toward O(2) in solid argon and neon but reactive in the b(4)F first excited state, in agreement with the previous gas-phase study of Honma and co…
Unlike general fluorination, amorphous fluorinated carbon (a-C:F) nanostructures have been synthesized directly and efficiently by an electron cyclotron resonance chemical vapor deposition (ECR–CVD) system using a mixture of C2H2, CF4, and Ar as precursors. The electron field-emission properties of the a-C:F nanostruc…
BACKGROUND: Nephrogenic fibrosing dermopathy (NFD) is a new skin-fibrosing disorder associated with renal dysfunction. It is marked by the acute onset of induration involving the upper and lower limbs, and it is characterized by distinctive histopathologic findings. METHODS: We report the case of a patient on hemodial…
Neutron diffraction measurements have been performed on a single crystal of TbMn 2 O 5 to elucidate the interplay between magnetic ordering and ferroelectricity. On cooling below T N1 = 42 K, the system enters a lock-in commensurate magnetic (CM) state with the magnetic propagation vector q = (1/2,0,1/4) from a two-di…
A series of chiral, chromophore-functionalized donor-embedded polybinaphthalenes were prepared by a Stille coupling reaction between a diiodo-functionalized chromophore and a bis(trimethyltin)binaphthalene derivative. The optical purity of the chiral binaphthalene monomer was varied, and its influence on the conformat…