Abstract: To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.

Abstract: A luminescent nanosheet has perovskite octahedral crystal units combined together in a planar configuration. The octahedral crystal units each have a multistacked crystal sheet structure. The octahedral crystal units are multistacked over at least 3 high in a direction vertical to a sheet plane, and an element providing a luminescence center is solid-solubilized between the multistacked octahedral crystal units.

Abstract: A high dielectric nanosheet laminate is produced by laminating nanosheets, each of which has a thickness of 10 nm or less and is formed of an oxide that has a perovskite structure wherein at least four NbO6 octahedrons, TaO6 octahedrons or TiO6 octahedrons are included in a unit lattice. Consequently, the high dielectric nanosheet laminate is capable of achieving a high dielectric constant and a satisfactory insulation property, which are preferable for high dielectric nanosheet multilayer capacitors or the like, at the same time even if formed very thin.

Abstract: To produce scaly silica particles in which formation of irregular particles is prevented. A process for producing scaly silica particles, which comprises a step of subjecting a silica powder containing silica agglomerates having scaly silica particles agglomerated, to acid treatment at a pH of at most 2, a step of subjecting the silica powder subjected to the acid treatment, to alkali treatment at a pH of at least 8 to deflocculate the silica agglomerates, and a step of wet disintegrating the silica powder subjected to the alkali treatment to obtain scaly silica particles.

Abstract: A luminescent nanosheet has perovskite octahedral crystals combined together in a planar configuration, and the octahedral crystals each have a multistacked crystal sheet structure wherein the octahedral crystals are multistacked over at least 3 folds in the direction vertical to a sheet plane, and an element providing a luminescence center is solid-solubilized between the multistacked octahedral crystals.

Abstract: A thin film capacitor includes a substrate and a dielectric thin film element formed on the substrate. The substrate can include an Si plate, an SiO2 film on the Si plate, and a Ti film formed on the SiO2 film. The dielectric thin film element includes a lower electrode, a dielectric thin film on the lower electrode, and an upper electrode formed on the dielectric thin film. The dielectric thin film is a thin film formed of a nanosheet, and a void portion of the dielectric thin film is filled with a p-type conductive organic polymer. Ti0.87O2, Ca2Nb3O10 or the like, is used as a dielectric material to form a major component of the nanosheet. As the p-type conductive organic polymer, polypyrrole, polyaniline, polyethylene dioxythiophene or the like, is suitable.

Abstract: A method for producing an anion-exchanging LDH using a carbonate ion-type layered double hydroxide represented by general formula QaT(OH)z(CO32?)0.5-b/2(X?)b.nH2O (where 1.8?a?4.2, z=2(a+1), 0?b<0.5, 0?n?5, Q represents divalent metal, T represents trivalent metal, and X? is an element or atom group that turns to monovalent anion) as a starting material, with value b increased at least to 0.5 and a maximum of 1, wherein the carbonate ion-type layered hydroxide is made to contact an alcoholic solution containing an acidic compound (MXm) (where m=1, 2, or 3; when m=1, M is H or NRR?R?.H, with R, R?, and R? being H or organic group; and when m=2 or 3, M is a metal salt, namely a divalent or trivalent metal).

Abstract: Provided is a water-swelling layered double hydroxide characterized by having an organic sulfonic acid anion (A?) between layers, and by being represented by the belowmentioned general formula (1): QZR(OH)2(Z+1)(A?)(1-y)(Xn?)y/n.mH2O . . . (1). Here, Q is a divalent metal, R is a trivalent metal, A? is an organic sulfonic acid anion, m is a real number greater than 0, and z is in the range of 1.8?z?4.2. Xn? is the n-valent anion remaining without A? substitution, n is 1 or 2, y represents the remaining portion of Xn?, and 0?y<0.4.

Abstract: At least two types of dielectric materials such as oxide nanosheets having a layered perovskite structure that differ from each other are laminated, and the nanosheets are bonded to each other via an ionic material, thereby producing a superlattice structure-having ferroelectric thin film. Having the layered structure, the film can exhibit ferroelectricity as a whole, though not using a ferroelectric material therein. Accordingly, there is provided a ferroelectric film based on a novel principle, which is favorable for ferroelectric memories and others and which is free from a size effect even though extremely thinned.

Abstract: The invention has for its object to provide a preparation method for preparing an anion-exchangeable LDH by decarbonation of a carbonate ion type LDH, which makes sure de carbonation is implemented with safety in a continuous manner while crystal shape, crystal structure and crystallinity are kept intact. The invention provides a preparation method for preparing an anion-exchangeable, layered double hydroxide wherein a carbonate ion type layered double hydroxide (LDH) having a composition represented by a general formula: QxR(OH)z(CO32?)0.5-y/2(X?)y.nH2O where x is indicative of a numeral range of 1.8?x?4.

Abstract: To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.

Abstract: Provided is an electromagnetic wave absorbent material comprising a magnetic film as the main constituent thereof. The magnetic film comprises a titania nanosheet where a 3d magnetic metal element is substituted at the titanium lattice position. The electromagnetic wave absorbent material stably and continuously exhibits electromagnetic wave absorption performance in a range of from 1 to 15 GHz band and is useful as mobile telephones, wireless LANs and other mobile electronic instruments. The absorbent material can be fused with a transparent medium and is applicable to transparent electronic devices such as large-sized liquid crystal TVs, electronic papers, etc.

Abstract: A magnetic artificial superlattice is composed of laminated thin films including two or more kinds of magnetic flaky particles (magnetic titania nanosheets) obtained by exfoliation of a layer titanium oxide in which Ti atoms in the lattice have been substituted with magnetic elements.

Abstract: Provided is a dielectric element comprising a dielectric thin film formed of a layer of perovskite nanosheets. The dielectric element has the advantages of inherent properties and high-level texture and structure controllability of the perovskite nanosheets, therefore realizing both a high dielectric constant and good insulating properties in a nano-region.

Abstract: The present invention relates to fine hollow powder with a titanium oxide shell, obtained by spray drying an exfoliated titania sol, and thin flaky titanium oxide powder obtained by pulverizing the fine hollow powder, and also to processes for producing the same. The present fine hollow powder and thin flaky titanium oxide powder have a distinguished dispersibility and are useful for additives to cosmetics, pigments, paints, etc., and the present fine hollow powder also has a distinguished flowability and is useful for seed particles for flow measurement.

Abstract: An all-solid lithium secondary battery has excellent reliability including safety. However, in general, its energy density or output density is lower than that achieved by liquid electrolyte systems. The all-solid lithium battery includes a lithium ion-conducting solid electrolyte as an electrolyte. The lithium ion-conducting solid electrolyte is mainly composed of a sulfide, and the surface of a positive electrode active material is coated with a lithium ion-conducting oxide. The advantages of the present invention are particularly significant when the positive electrode active material exhibits a potential of 3 V or more during operation of the all-solid lithium battery, i.e., when redox reaction occurs at a potential of 3 V or more.

Abstract: Provided is an electromagnetic wave absorbent material comprising a magnetic film as the main constituent thereof. The magnetic film comprises a titania nanosheet where a 3d magnetic metal element is substituted at the titanium lattice position. The electromagnetic wave absorbent material stably and continuously exhibits electromagnetic wave absorption performance in a range of from 1 to 15 GHz band and is useful as mobile telephones, wireless LANs and other mobile electronic instruments. The absorbent material can be fused with a transparent medium and is applicable to transparent electronic devices such as large-sized liquid crystal TVs, electronic papers, etc.

Abstract: A monolayer or a multilayer of niobic acid nanosheets is attached to form a dielectric film, and other electrode is arranged on the surface of the dielectric film to construct a dielectric element, and the dielectric element thus provided realizes both high permittivity and good insulating properties even in a nano-region. Also provided is a method of producing the element at low temperatures with no influence of substrate interface deterioration and composition deviation thereof. The method entirely solves the problems of substrate interface deterioration and the accompanying composition deviation and electric incompatibility, and solves the intrinsic problem of “size effect” that the film thickness reduction to a nano-level lowers the specific permittivity and increases the leak current, and the method takes advantage of the peculiar properties and good ability of texture and structure regulation that the niobic acid nanosheet has.

Abstract: The present invention relates to fine hollow powder with a titanium oxide shell, obtained by spray drying an exfoliated titania sol, and thin flaky titanium oxide powder obtained by pulverizing the fine hollow powder, and also to processes for producing the same. The present fine hollow powder and thin flaky titanium oxide powder have a distinguished dispersibility and are useful for additives to cosmetics, pigments, paints, etc., and the present fine hollow powder also has a distinguished flowability and is useful for seed particles for flow measurement.

Abstract: The invention provides a novel luminescent nanosheet, and applications to that luminescent nanosheet. The invention also breaks down conventional common knowledge of nanosheet solutions to provide a nanosheet paint that makes use of a high-concentration nanosheet solution suitable for dispersion of a luminescent nanosheet or the like. The invention provides a luminescent nanosheet having perovskite octahedral crystals combined together in a planar configuration, characterized in that the octahedral crystals each have a multistacked crystal sheet structure wherein the octahedral crystals are multistacked over at least 3 high in the direction vertical to a sheet plane, and an element providing a luminescence center is solid-solubilized between the multistacked octahedral crystals (see FIG. 8).