Materials Literature
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Abstract Experimental details are given for the preparation of 1,1′‐ferrocenedicarboxylic acid and 1,1′‐ferrocenedicarbonyl chloride. Ferrocenedicarbonyl chloride was used to prepare novel condensation polymers containing the ferrocene nucleus as part of the main polymer chain. Interfacial polycondensation was used fo…
Theories of several elastic effects resulting from the contribution of electrons to the strain energy function of germanium are presented. They show that the elastic properties are appreciably changed by doping with donor and acceptor impurities. The properties considered are: (1) volume, (2) elastic constants of dege…
In addition to the well‐known zinc orthotitanate (Zn 2 TiO 4 ) and zinc metatitanate (ZnTiO 3 ), the study of solid‐state reactions in the system ZnO‐TiO 2 disclosed a previously unrecognized compound, Zn 2 Ti 3 O 8 . This compound was obtained when sulfate‐containing hydrous titanium oxide of anatase structure was re…
Infrared absorption measurements of a number of metal oxides with spinel structure have been carried out in the range of 10 to 30 μ . All spinels show mainly two chief groups of absorption ( A and B ). By preparing a number of mixed crystal series it was possible to determine the mutual relations of A and B and the de…
A review is made of the work on reduced and ``doped'' rutile performed since the appearance of Grant's survey article in the Reviews of Modern Physics (1958). Measurements of electrical and optical properties, and of electron spin resonance spectra are discussed. A model of electronic bound states and conduction level…
ADVERTISEMENT RETURN TO ISSUEPREVArticleProgress in Semiconductors.FREDERICK SEITZCite this: J. Am. Chem. Soc. 1961, 83, 20, 4304Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1021/ja01481a062https://doi.org/10.1021/ja01…
The experimental information relevant to the band structure of the compounds InSb, InAs, GaSb, GaAs, GaP, AlSb and some of their alloys is synthesized and interpreted in terms of a consistent theoretical picture which exploits the close relationship linking the band structures of the group 4 and 3–5 semiconductors. It…
This paper reviews the work which has been carried out in these Laboratories during the past two years on single crystals of bismuth telluride and its alloys. The combination of experiments on Faraday rotation with those performed previously on galvanomagnetic effects has established that there are 3- and 6-valley ban…
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1961.
The conditions necessary in metals for the presence or absence of localized moments on solute ions containing inner shell electrons are analyzed. A self-consistent Hartree-Fock treatment shows that there is a sharp transition between the magnetic state and the nonmagnetic state, depending on the density of states of f…
Abstract The systematic pleating of polymer molecules in their crystallization, in segments of a length of the order of 100 A, which depends on the crystallization temperature, is interpreted in terms of the kinetics of crystal growth. The theory begins with but departs from a theory proposed by Lauritzen & Hoffma…
Radiofrequency waves at 15 and 45 Mc are transduced into pressure waves at the same frequencies, and are applied to a CdS crystal. The waves are then converted by a second transducer into a r-f output wave. The signal amplification is found as a function of the illumination intensity on the crystal, and the electric f…
Abstract The dynamical theory of electron diffraction is developed in a form suitable for the computation of images of crystal lattice defects such as dislocations observed by transmission electron microscopy. As shown in a previous kinematical theory, the contrast arises because the waves diffracted by atoms near the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCOMPLEXES OF IRON WITH d-TARTARIC AND meso-TARTARIC ACIDSR. W. Green and Gwenda M. ParkinsCite this: J. Phys. Chem. 1961, 65, 9, 1658–1659Publication Date (Print):September 1, 1961Publication History Published online1 May 2002Published inissue 1 September 1961https://doi.org…
Abstract The changes in the molecular weight distribution accompanying the thermal depolymerization of poly‐α‐methylstyrene have been investigated. The original polymer, produced by anionic catalysis, had a narrow distribution of molecular weights, which facilitated measurement of the changes. The depolymerization whe…
Summary Specimens of kaolinite have been found in inclusions in the ferruginous deposits on the Yorkshire Coast, just north of Scalby. The excellent quality of the X-ray powder pattern suggests that this kaolinite is better crystalline than kaolinites from other localities. Although the lattice constants of the Scalby…
Contact angles, and adherence of sodium disilicate glasses with varying iron oxide additions on platinum and iron were studied at 1000°C. in vacuum. In the glass‐platinum systems the iron concentration in the glass did not affect either the contact angle or the adherence. No devitrification occurred in the glass‐plati…
The carrier spin-resonance line of neutron-irradiated single crystals of graphite at 300\ifmmode^\circ\else\textdegree\fi{}K has been observed as a function of the thermal neutron flux up to a dose of 9.6\ifmmode\times\else\texttimes\fi{}${10}^{18}$ nvt. From the intensity increase and the $g$ shift for $H$ parallel t…
The bipolar output of the rf phase detector of the receiver in a nuclear magnetic resonance pulse experiment is fed through a 4-diode sampling switch to an RC integrator, whose output is read by a recording electrometer. The switch (a ``transmission gate'') includes two type 7266 ceramic thermionic diodes, whose back…
Abstract Vanadinhexacarbonyl erweist sich als besonders reaktionsfähig. Reaktionen mit N‐Basen (B) in Benzol verlaufen bereits bei Raumtemperatur im Sinne einer „Basenreaktion”︁ unter Bildung von Hexacarbonylvanadaten, [VBn] [V(CO)6]2 (n = 4 oder 6). Auch schwache Basen wie Säurenitrile und O‐Basen geben Verbindungen…