Materials Literature
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We report the temperature dependent mid- and near-infrared spectra of K4C60, Rb4C60 and Cs4C60. The splitting of the vibrational and electronic transitions indicates a molecular symmetry change of C604- which brings the fulleride anion from D2h to either a D3d or a D5d distortion. In contrast to Cs4C60, low temperatur…
In the red: The synthesis and optical properties of homologous ladder-type near-infrared-absorbing chromophores, namely, two pentarylenebis(dicarboximide)s (green traces; see picture) as well as a hexarylenebis(dicarboximide) (yellow trace) have been studied. A strong bathochromic shift of the absorption maximum is no…
We present the theoretical and detailed experimental characterizations of photothermal heterodyne imaging. An analytical expression of the photothermal heterodyne signal is derived using the theory of light scattering from a fluctuating medium. The amplitudes of the signals detected in the backward and forward configu…
Abstract Both Raman and infrared spectroscopy have been used to characterise the three phase‐related minerals—dreyerite (tetragonal BiVO 4 ), pucherite (orthorhombic BiVO 4 ) and clinobisvanite (monoclinic BiVO 4 )—and a comparison of the spectra is made with that of the minerals namibite (Cu(BiO 2 )VO 4 (OH)), schuma…
Abstract Cotton fabrics were treated with montmorillonite (MMT) so as to improve the wrinkle‐resistant properties of the cotton fabrics. The MMT in emulsion form was applied by padding method to the cotton fabrics, and the wrinkle‐resistant properties of the MMT‐treated cotton fabrics and the wrinkle‐resistant propert…
In this work we review the physical motivations, both experimental and theoretical, suggesting the possible use of quasicrystals as thermoelectric materials. Analytical expressions for the dimensionless thermoelectric figure of merit and the compatibility factor are discussed in order to optimize the thermoelectric pe…
Abstract Uniform polystyrene (PSt) particles with the size of 1.9 μm were first prepared via dispersion polymerization, and then used as the seeds in a second‐stage dispersion copolymerization of styrene (St) and methacrylic acid (MAA) to produce carboxyl‐carrying microspheres. The PSt seed particles were swollen by m…
Electrically insulating films of Al 2 O 3 were deposited using thermal spray technology followed by the sputter deposition of a strain gauge pattern using shadow masking techniques. For the first time, a thin film strain gauge of chromium was successfully fabricated on thermally sprayed Al 2 O 3 insulation. X-ray diff…
The µ3, µ5 and µ7 approximants in Mg-Zn-RE were related in real and reciprocal space. The structure factors of µ3, µ5 and µ7 have quite similar intensity distributions and identical phases for the strongest corresponding reflections. Structure models of any of µ3, µ5 and µ7 can be obtained from any of the others using…
It is now generally admitted that pores are intriguing special features of quasicrystals. Therefore, we have performed an ‘in situ’ and real time observation of the pore evolution during directional solidification and melting cycles of an icosahedral Al–Pd–Mn bi-grained sample, by synchrotron X-ray radiography. Rather…
The U.S. Department of Energy is tasked with the disposition of alkaline, high‐level radioactive wastes stored in underground tanks at the Hanford Site. The radioactivity of the liquid waste fraction is dominated by the 137Cs and 90Sr fission products. The waste is to be vitrified following specific pretreatment proce…
In this work we examine the interaction of molecular and atomic deuterium with the fivefold surface of an icosahedral (i-) Al–Pd–Mn alloy using angle-resolved low-energy ion scattering under ultrahigh vacuum conditions. i-Al–Pd–Mn has been studied extensively and is known to form a laterally-bulk-terminated surface th…
There are a number of interesting articles1 that have discussed qualitative, quantitative, and other aspects of thermal expansion. A method to determine linear coefficient of thermal expansion using readily available materials is presented here. The design of the apparatus for this method allows for the width of a sin…
We have investigated the 2-fold surface of an icosahedral Al70Pd21Mn9 quasicrystal by means of low-temperature scanning tunnelling microscopy (77 K). The sequence of the terrace step edge heights revealed a Fibonacci sequence with S = 2.40 Å and L = τS = 3.88 Å as fundamental terrace step heights. S and L can be relat…
Abstract Tri(acryloyloxyethyl) phosphate (TAEP) was blended in different ratios with epoxy acrylate EB600 and polyurethane acrylate EB270 to obtain a series of UV curable flame retardant resins. The thermal degradation mechanisms of their cured films in air were studied by thermogravimetric analysis, in situ Fourier‐t…
Summary We consider the CSLs of 4-dimensional hypercubic lattices. In particular, we derive the coincidence index Σ and calculate the number of different CSLs as well as the number of inequivalent CSLs for a given Σ . The hypercubic face centered case is dealt with in detail and it is sketched how to derive the corres…
Using electrostatic-levitator (ESL)-based containerless processing combined with non-contact measuring techniques, surface tension and viscosity have been measured for Ti39.5Zr39.5Ni21, using the oscillating-drop method, in the superheated and metastable undercooled liquid states. Viscosity measurements show a non-Arr…
The formation conditions for a Zn–Mg–Yb icosahedral quasicrystal, which is primitive (P) type and has a six-dimensional lattice parameter a 6D = 7.371 Å, have been studied. This quasicrystal is formed only by quenching from a temperature higher than 650°C in the narrow composition region between approximately Zn76Mg9Y…
This paper reports a vacuum or space related effect, which is referred to as “cold welding”, “adhesion” or “sticking”. This effect is studied for bulk quasicrystal (J.M. Dubois, Useful Quasicrystals (World Scientific, Singapore, 2005)) versus different kinds of counterparts (steel, aluminium, titanium, hard metals). F…
The phase response of composite right/left-handed transmission lines is used in the design of a dual-mode ring resonator. The phase can be designed to change the spacing of the resonant modes. Simulation and measured results for a dual-mode ring demonstrate this technique. The designed structure exhibits the eliminati…