Materials Literature
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We determine the elastic moduli of two-dimensional assemblies of disks by computer simulations. The disks interact through elastic contact forces, that oppose the relative displacement at the contact points by means of a normal and a tangential stiffness, both taken constant. Our simulations confirm that the uniform s…
Graphene has shown great application potentials as the host material for next generation electronic devices. However, despite its intriguing properties, one of the biggest hurdles for graphene to be useful as an electronic material is its lacking of an energy gap in the electronic spectra. This, for example, prevents…
Elektrochemische Kondensatoren: Ein hierarchisches poröses Material auf Graphitbasis enthält makroporöse ionengepufferte Mikroreservoirs, Kanäle für den Ionentransport und lokalisierte Graphitstrukturen (siehe Bilder des Gerüsts (oben) und eines Kohlenstoffplättchens). Das neue Material löst Probleme der Elektrodenkin…
We discuss various scattering mechanisms for Dirac fermions in single-layer graphene. It is shown that scattering on a short-range potential (e.g. due to neutral impurities) is mostly irrelevant for electronic quality of graphene, which is likely to be controlled by charged impurities and ripples (microscopic corrugat…
We thoroughly and critically review studies reporting the real (refractive index) and imaginary (absorption index) parts of the complex refractive index of silica glass over the spectral range from 30 nm to 1000 microm. The general features of the optical constants over the electromagnetic spectrum are relatively cons…
The newly expanded and revised edition of Fiber-Reinforced Composites: Materials, Manufacturing, and Design presents the most up-to-date resource available on state-of-the-art composite materials. This book is unique in that it not only offers a current analysis of mechanics and properties, but also examines the lates…
Electrochemical capacitors: A hierarchical porous graphitic carbon material, composed of macroporous ion-buffering microreservoirs, ion-transporting channels, and localized graphitic wall structures, is presented (see images; top: 3D skeleton, bottom: carbon platelet). The properties of this new material combine to ov…
Crystal defects in magnesium and magnesium based alloys like AZ31 are of major importance for the understanding of their macroscopic properties. We have investigated defects and their chemical surrounding in Mg and AZ31 on an atomic scale with Doppler broadening spectroscopy of the positron annihilation radiation. In…
The synthesis of a rare example of a calix[2]pyrrole[2]thiophene derivative incorporating two tetrathiafulvalene units is described along with its X-ray crystal structure. Complexation studies between the bis(tetrathiafulvalene)-calix[2]pyrrole[2]thiophene and 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) were carried ou…
The organic glass-forming materials 1,3-bis(1-naphthyl)-5-(2-naphthyl)benzene (2) and its partially deuterated analogue, 1,3-bis(1-naphthyl-d(7))-5-(2-naphthyl)benzene (2-d(14)), have been synthesized on a gram scale using Suzuki coupling reactions. Detailed spectroscopic studies afford complete NMR assignments (1H, 2…
Aqueous solubilities of two C 20 H 14 isomers, triptycene (9,10- o -benzeno-9,10-dihydroanthracene) and 9-phenylanthracene, were measured at temperatures from 313 K to the solute melting point and pressures close to 5 MPa by a dynamic method combined with gas chromatography/mass spectrometry. In addition, aqueous solu…
Abstract Third order nonlinear optical susceptibilities χ<3> of ternary Zn1−xMgxSe and Cd1−xMgxSe crystals have been measured using standard degenerate four-wave mixing (DFWM) method at 532 nm. The nonlinear transmission technique has been applied to check if our crystals exhibit two-photon absorption. The studi…
The adsorption of the ligands alpha-lipoic acid, dihydrolipoic acid, and dithiothreitol to films of deposited CdS nanoparticles was studied in situ by ATR-IR spectroscopy. For alpha-lipoic acid and dihydrolipoic acid, the spectra of the adsorbed species closely resemble those of the respective solution species. Howeve…
The growth of PbS crystal was kinetically controllable by adjusting the concentration of the anion surfactant sodium dodecylbenzenesulfonate (SDBS) and the acidity of the solution under microwave irradiation. SDBS favored stacking in the (111) plane but blocked that along the [111] zone axis. Adjusting the ratio of SD…
The thermal decomposition of iron phosphate trihydrate FePO 4 ·3H 2 O was investigated in air using TG-DTG/DTA. The FePO 4 ·3H 2 O decomposes in two steps, and the final decomposition product (FePO 4 ) was studied by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT…
Abstract Self-assembly of tetrathiafulvalenes, their conjugated oligo-mers, and giant macrocyclic oligothiophenes in solution leads to important solvatochromic, thermochromic, electrochromic, and switching properties. Furthermore, based on the self-assembly in solution, various nanostructures can be constructed in the…
Reaction of CuCl2 with 2-amino-5-fluoropyridine and HCl in aqueous solution yields bis(2-amino-5-fluoropyridinium) tetrachlorocuprate(II), (5FAP)2CuCl4, (1). The complex crystallizes in the monoclinic space group P21/c with cell dimensions a = 6.926(7) A, b = 21.73(2) A, c = 10.911(10) A, beta = 100.19(2) degrees , V…
Three novel inorganic–organic composite polyoxotungstates {[Ni(dap) 2 (H 2 O)] 2 [Ni(dap) 2 ] 2 [Ni 4 (Hdap) 2 (α-B-HSiW 9 O 34 ) 2 ]}·7H 2 O ( 1 ), {[Ni(dap) 2 (H 2 O)] 2 [Ni(dap) 2 ] 2 [Ni 4 (Hdap) 2 (α-B-HGeW 9 O 34 ) 2 ]}·6H 2 O ( 2 ), and {[Ni(dap) 2 (H 2 O)] 2 [Ni(dap) 2 ] 2 [Ni 4 (Hdap) 2 (α-B-PW 9 O 34 ) 2 ]}·…
One-dimensional (1D) conductive nanowire is one of the most important components for the development of nanosized electronic devices, sensors, and energy storage units. Great progresses have been made to prepare the 1D-conducting polymeric nanofibers by the low concentration process or the synthesis with hard or soft…
Abstract An intense CW-YVO4 laser beam of 1064 nm was focused into a supersaturated D2O solution of glycine, leading to its crystallization. At the focal point on an air–solution interface, a small single glycine crystal was trapped and grew quickly. The crystallization mechanism is considered in view of gathering and…