摘要:
An electrical capacitor includes an organic electrolyte to provide high power, high energy density, and a broad operating temperature range. The capacitor includes electrodes and an electrolyte system comprising a salt combined with a solvent containing a nitrile. The electrolyte system is selected to be relatively nonreactive and difficult to oxidize or reduce so as to produce a high electric potential range. As examples, the electrolyte may include a solvent selected from the group consisting of acetonitrile, succinonitrile, glutaronitrile, propylene carbonate, and ethylene carbonate; a salt cation selected from the group consisting of tetraalkylammonium (R₄N⁺) and alkali metals; and an anion selected from the group consisting of trifluoromethylsulfonate (CF₃SO₃⁻), bistrifluoromethylsulfurylimide (N(CF₃SO₂)₂⁻), tristrifluoromethylsulfurylcarbanion (C(CF₃SO₂)₃⁻), tetrafluoroborate (BF₄⁻), hexafluorophosphate (PF₆⁻), hexafluoroarsenate (AsF₆⁻), and perchlorate (ClO₄⁻).
摘要:
A photoelectrochemical method and apparatus are disclosed for fabricating electronic circuits. An electroplating solution (12) is applied to the surface of a reverse biased p-type semiconductor material (16), such as NiO. The solution-covered (14) NiO surface (16) is illuminated with a light beam (20) directed by computer aided design data to photoelectrochemically deposit a seed layer of metal in an electronic circuit pattern. The seed layer may be thickened by further deposition in a plating bath (24) to form metallic circuit traces on the NiO (16). If desired, the metallic circuitry may be transferred from the NiO (16) to an alternate substrate having a low dielectric constant. The porosity of the NiO surface (16) can be adjusted to optimize the metallic circuit adhesion for image retention or ease of transfer. The metallic traces may also be treated to reduce adhesion of subsequently deposited metal that can be transferred readily. If sufficient residual metal remains on the NiO surface (16) after circuit transfer, the trace can be rethickened to transfer multiple circuits of the same pattern without reimaging. An old metallic image can be electro-dissolved by changing the bias of the NiO with respect to the plating bath, thereby erasing the old image so that a new circuit pattern can be formed by photoelectrochemical deposition. The process can be performed on a rotating cylinder (18) so that electronic circuits can be produced in a continuous process of photoelectrochemical deposition, seed metal thickening, adhesion reduction, circuit transfer, and image erasure that provides advantages in cost, circuit resolution, and environmental protection.
摘要:
A crystal of a complex salt containing a neutral nonlinear optical organic ligand coordinated to a metal ion is used as the nonlinear element in a nonlinear optical device. In one embodiment, the crystal of a complex salt comprises a crystal of tris(thiourea)zinc sulfate. In another embodiment, the crystal of a complex salt comprises a crystal of (4-nitropyridine-N-oxide)mercury(II) chloride.
摘要:
Production of polypyrrole gel applicable for casting on an impermeable substrate, such as glass, to form a conductive film thereon, by reaction of a pyrrole with an oxidant/dopant, e.g., ferric or cupric alkylbenzenesulfonate in an aprotic solvent, particularly methylene chloride or 1,2-dichloroethane. Specific examples of such alkylbenzenesulfonates include ferric ethylbenzenesulfonate and cupric dodecylbenzenesulfonate. The viscosity of the gel can be adjusted by solvent addition so that it can be readily applied to a substrate surface, such as glass. Upon subsequent solvent evaporation, a dark coherent textured film of conductive polypyrrole remains on the substrate surface.
摘要:
A nonlinear optical material includes a noncentrosymmetric crystal of an anionic boron complex salt containing a cation and at least one organic ligand coordinated to a boron atom. The nonlinear optical crystal may consist of a compound having the formula A[BC₂] where A is a monocation, B is boron, and C is the organic ligand, or a compound having the formula A[BC₂]₂ where A is a dication, B is boron, and C is the organic ligand. The organic ligands may also be organic molecules having α-dihydroxy functionalities. Furthermore, the organic ligands may be selected from the group consisting of α-hydroxy carboxylic acids and 1, 2 - diols or from the group consisting of -malic acid, -lactic acid, -tartaric acid, dimethyl- -tartrate, diethyl- -tartrate, ℓ-malic acid, ℓ-lactic acid, ℓ-tartaric acid, dimethyl-ℓ-tartrate, diethyl-ℓ-tartrate, and ethylene glycol. The anionic boron complex may be selected from the group consisting of boro-di(ℓ-malate), boro-di(ℓ-tartrate), boro-di(ℓ-lactate), boro-di(diethyl-ℓ-tartrate), boro-di(dimethyl-l-tartrate), boro-di( -malate), boro-di( -tartrate), boro-di( -lactate), boro-di(diethyl- -tartrate), boro-di(dimethyl-d-tartrate) and boro-di(ethylene glycolate). The cation may be selected from the group consisting of alkali metals, alkaline earth metals, ammonium ions, and Group 2B dications. The cation may be further selected from the group consisting of lithium, sodium, potassium, the ammonium NH₄⁺ ion, the guanidinium C(NH₂)₃⁺ ion, calcium, and zinc.
摘要:
A crystal of a complex salt containing a neutral nonlinear optical organic ligand coordinated to a metal ion is used as the nonlinear element in a nonlinear optical device. In one embodiment, the crystal of a complex salt comprises a crystal of tris(thiourea)zinc sulfate. In another embodiment, the crystal of a complex salt comprises a crystal of (4-nitropyridine-N-oxide)mercury(II) chloride.
摘要:
A method for producing oxidant/dopant reagent solutions which comprises reacting a basic ferric carboxylate, preferably basic ferric acetate, with an alkyl or aryl sulfonic acid, e.g., benzenesulfonic acid, to produce the corresponding ferric sulfonate in solution. Oxidant/dopant solutions can also be prepared containing cupric or ceric sulfonates. The oxidant/dopant solution is employed in situ for reaction with a pyrrole to produce electrically conductive polypyrrole. A porous substrate, such as fiberglass cloth, can be dipped in the oxidant/dopant solution, dried and then treated with a pyrrole to produce an electrically conductive polypyrrole deposit in the interstices of the substrate.