Abstract: Disclosed herein are quantum dot devices, as well as related computing devices and methods. For example, in some embodiments, a quantum dot device may include: a quantum well stack and a plurality of linear arrays of gates above the quantum well stack to control quantum dot formation in the quantum well stack. An insulating material may be between a first linear array of gates and a second linear array of gates, the insulating material may be between individual gates in the first linear array of gates, and gate metal of the first linear array of gates may extend over the insulating material.

Abstract: A gas turbine engine comprises, in axial flow sequence, a fan assembly, a compressor module, a turbine module, and an exhaust module. The gas turbine engine comprises first and second engine mount planes. The first and second engine mount planes are configured to support gas turbine engine in machine body. The gas turbine engine has axial length L, with axial length extending from inlet face of engine to exhaust face of engine. The first engine mount plane is positioned axially along gas turbine engine at first engine mount plane position, with first engine mount plane position within a range of between 0.24*L to 0.32*L from the inlet face of the engine. The second engine mount plane is positioned axially along gas turbine engine at second engine mount plane position, with second engine mount plane position within a range of between 0.73*L to 0.79*L from the inlet face of the engine.

Abstract: Disclosed herein are quantum dot devices with conductive liners, as well as related computing devices and methods. For example, in some embodiments, a quantum dot device may include a base, a first fin extending from the base, a second fin extending from the base, a conductive material between the first fin and the second fin, and a dielectric material between the conductive material and the first fin.

Abstract: Carbon black beads are provided which generally comprise carbon black powder and an elastomer such as styrene butadiene rubber, butadiene rubber, natural rubber, nitrile rubber, or the like, in an amount between 0.5 and 5.0% by weight of the beaded carbon black. The carbon black beads are made by beading the carbon black powder with latex. The latex treated carbon black is readily handleable in bulk form, easily dispersible in elastomeric compositions, and imparts improved dynamic properties to elastomeric compositions.

Abstract: Stable K.sub.2 Fe.sub.22 O.sub.34 in the form of lamellar platelets useful as a dehydrogenation catalyst and a method of manufacturing the same, including the steps of mixing iron oxide and a potassium compound, such as potassium carbonate, preferably in a molar ratio of Fe to K of from 3 to 6 and calcining the mixture at a temperature of at least about 900.degree. C. for at least 15 minutes.

Abstract: Stable K.sub.2 Fe.sub.22 O.sub.34 in the form of lamellar platelets useful as a dehydrogenation catalyst and a method of manufacturing the same, including the steps of mixing iron oxide and a potassium compound, such as potassium carbonate, preferably in a molar ration of Fe to K of from 3 to 6 and calcining the mixture at a temperature of at least about 900.degree. C. for at least 15 minutes.

Abstract: A process for the distillation of readily polymerizable vinyl aromatic compounds which comprises subjecting said compounds to distillation conditions in the presence of an effective amount of a pretreated polymerization inhibitor selected from the group consisting of asphalts, asphaltenes and any combination thereof. The inhibitor is pretreated by subjecting the inhibitor to a process for substantially increasing the free radical content therein.

Abstract: Disclosed is a process for modifying accumulated cross-linked polymer in an apparatus used for the production of a vinylaromatic compound, comprising optionally softening the polymer with an organic solvent; precipitating the polymer with a light, polar non-solvent for the polymer and expanding the softened polymer by bringing the softened polymer in contact with steam whereby the polymer is converted into a state which enables it to be more easily removed from the apparatus.

Abstract: A process for preparing vinyltoluene comprising passing ethyltoluene through a dehydrogenation zone to form vaporous crude vinyltoluene, adding from about 50 to about 100 parts per million by weight of a polymerization inhibitor such as a nitrated phenol to the vaporous crude vinyltoluene at a temperature between about 200.degree. and about 300.degree. C., condensing the vaporous crude vinyltoluene, maintaining the pH of the aqueous phase of the condensed crude vinyltoluene at a value between about 5.5 and about 6.

Abstract: A process for producing aromatic compounds from a paraffin containing feedstock in which the feedstock is passed to a reaction zone into contact with a multi-component catalyst system. The catalyst system comprises a discreet physical mixture of a silicalite homologation catalyst and a metal or metal oxide dehydrogenation catalyst. The process is carried out to cause the dehydrogenation of paraffins to olefins, the oligomerization of olefins to cyclic napthenes and the aromatization of the napthenes. Reaction conditions and relative catalyst concentrations to provide a relationship between the thermodynamic constraint for the dehydrogenation of the paraffins and the balancing of the kinetics of the dehydrogenation and oligomerization reactions to limit the olefin concentration to a value which does not result in substantial coking of the catalyst system.

Abstract: A process for alkylating aromatic substrates is disclosed which includes contacting the aromatic substrate with an alkylating agent in a reaction zone at temperatures of from about 350.degree. C. to about 500.degree. C. in the presence of a crystalline silica polymorph silicalite catalyst material.

Abstract: An apparatus for preparing vinyltoluene comprising passing ethyltoluene through a dehydrogenation zone to form vaporous crude vinyltoluene, adding from about 50 to about 100 parts per million by weight of a polymerization inhibitor such as a nitrated phenol to the vaporous crude vinyltoluene at a temperature between about 200.degree. and about 300.degree. C., condensing the vaporous crude vinyltoluene, maintaining the pH of the aqueous phase of the condensed crude vinyltoluene at a value between about 5.5 and about 6.

Abstract: A process for the selective alkylation of a monoalkyl benzene in which the alkyl substituent is either methyl or ethyl, to yield a dialkylbenzene product in which the para isomer of the disubstituted product is present in a concentration greater than in a thermodynamic equilibrium is provided. The method essentially comprises passing the monoalkyl benzene and an alkylating agent capable of methylation or ethylation through a reaction zone containing a crystalline silica polymorph silicalite catalyst. Water, in the form of steam, can be co-fed as an option.

Abstract: A process for suppressing production of ortho isomers during catalytic alkylation of monoalkylbenzenes which comprises contacting the aromatic substrate with an alkylating agent in the presence of a crystalline silica polymorph silicalite catalyst material.

Abstract: Disclosed is a process for the distillation of readily polymerizable vinyl aromatic compounds and a new polymerization inhibitor therefor. The process comprises subjecting a vinyl aromatic compound to elevated temperatures in a distillation system in the presence of a new polymerization inhibitor comprising 2,6-dinitro-p-cresol. Also disclosed is a distillation method and apparatus for use with this inhibitor.

Abstract: A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The composition includes effective amounts of 2,6-dinitro-p-cresol and either a phenylenediamine or 4-tert-butylcatechol respectively, to act as a polymerization co-inhibitor system in the presence of oxygen.

Abstract: A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The compound includes effective amounts of phenothiazine, 4-tert-butylcatechol and 2,6-dinitro-p-cresol respectively, as a polymerization inhibitor system in the presence of oxygen resulting in a less viscous polymer tar and in the effective inhibition of polymerization to temperatures as high as 150.degree. C.

Abstract: A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The composition includes effective amounts of 2,6-dinitro-p-cresol and either a phenylenediamine or 4-tert-butylcatechol respectively, to act as a polymerization co-inhibitor system in the presence of oxygen.

Abstract: Disclosed is a process for modifying accumulated cross-linked polymer in an apparatus used for the production of a vinylaromatic compound, comprising optionally softening the polymer with an organic solvent; precipitating the polymer with a light, polar non-solvent for the polymer and expanding the softened polymer by bringing the softened polymer in contact with steam whereby the polymer is converted into a state which enables it to be more easily removed from the apparatus.

Abstract: A process for the production of styrene wherein ethylene oxide and benzene are added to a reactor at a temperature between about 600.degree. F. and about 825.degree. F. in the presence of an aluminosilicate type catalyst. The reaction proceeds directly to form styrene within the reactor.