Abstract: Organically modified metal oxide nanoparticles containing two or more cores including a plurality of metal atoms and a plurality of oxygen atoms covalently bonded to the plurality of metal atoms; a first modifying group that is a ligand coordinated to each of the cores and selected from the group consisting of a carboxylic acid carboxylate, a sulfonic acid sulfonate, and a phosphonic acid phosphonate; and a second modifying group that is coordinated to each of the cores and is a ligand having a structure different from that of the first modifying group and/or an inorganic anion, in which organically modified metal oxide nanoparticles have a structure in which the cores are crosslinked through a coordinate bond by at least the first modifying group.

Abstract: An organically modified metal oxide nanoparticle includes a core, a first modification group, and a second modification group. The core includes a plurality of metal atoms and a plurality of oxygen atoms bonded to the plurality of metal atoms. The first modification group is a saturated carboxylic acid/carboxylate ligand coordinated to the core. The second modification group is coordinated to the core, and is an inorganic anion having a smaller size than the first modification group and/or a saturated carboxylic acid/carboxylate ligand having a smaller molecular weight than the first modification group.

Abstract: A resist composition containing a metal compound and a polymer. A structure of the metal compound is changed upon exposure, and the metal compound exhibits changed solubility in a developing solution. The polymer segregates on a surface of a resist film in a case where the resist film is formed using the resist composition. The metal compound contains a metal ion of a metal atom of Group 3 to Group 16 in the long periodic table or a metal oxide of the metal atom, and a bonder that is bonded to the metal ion or the metal oxide. The content of the metal atom contained in the metal ion or the metal oxide is in a range of 0.2% to 3% by mass with respect to a total mass of the resist composition.

Abstract: Organically modified metal oxide nanoparticles containing two or more cores including a plurality of metal atoms and a plurality of oxygen atoms covalently bonded to the plurality of metal atoms; a first modifying group that is a ligand coordinated to each of the cores and selected from the group consisting of a carboxylic acid carboxylate, a sulfonic acid sulfonate, and a phosphonic acid phosphonate; and a second modifying group that is coordinated to each of the cores and is a ligand having a structure different from that of the first modifying group and/or an inorganic anion, in which organically modified metal oxide nanoparticles have a structure in which the cores are crosslinked through a coordinate bond by at least the first modifying group.

Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.

Abstract: An organically modified metal oxide nanoparticles that can be produced by a simple method and can increase the sensitivity and resolution of a resist material. The EUV photoresist material contains organically modified metal oxide nanoparticles and a solvent. The organically modified metal oxide nanoparticles include a core, a first modification group, and a second modification group. The core includes a plurality of metal atoms and a plurality of oxygen atoms bonded to the plurality of metal atoms. The first modification group is a carboxylic acid carboxylate ligand coordinated to the core. The second modification group is a carboxylic acid carboxylate ligand coordinated to the core and having a smaller molecular weight than the first modification group and/or an inorganic anion smaller in size than the first modification group.

Abstract: An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.