Nanoheterostructure and method for producing the same

Abstract

A nanoheterostructure includes a first inorganic component and a second inorganic component one of which is a matrix, and the other of which is three-dimensionally and periodically arranged in the matrix, and has a three-dimensional periodic structure whose average value of one unit length of a repeated structure is 1 nm to 100 nm.

1 . A nanoheterostructure comprising a first inorganic component and a second inorganic component one of which is a matrix, and the other of which is three-dimensionally and periodically arranged in the matrix, wherein
 the nanoheterostructure has a three-dimensional periodic structure whose average value of one unit length of a repeated structure is 1 nm to 100 nm.   
     
     
         2 . The nanoheterostructure according to  claim 1 , wherein the inorganic component three-dimensionally and periodically arranged in the matrix has a shape selected from the group consisting of a spherical shape, a columnar shape, and a gyroid shape. 
     
     
         3 . The nanoheterostructure according to  claim 1 , wherein each of the first inorganic component and the second inorganic component is at least one component selected from the group consisting of metals, oxides, carbides, nitrides, borides, and salts. 
     
     
         4 . The nanoheterostructure according to  claim 1 , wherein each of the first inorganic component and the second inorganic component is at least one component selected from the group consisting of metals and metal oxides. 
     
     
         5 . The nanoheterostructure according to  claim 1 , wherein the average value of one unit length of the repeated structure is 1 nm to 50 nm. 
     
     
         6 . The nanoheterostructure according to  claim 1 , wherein
 each of the first inorganic component and the second inorganic component is a magnetic material, and   the nanoheterostructure is a composite magnetic material.   
     
     
         7 . The nanoheterostructure according to  claim 6 , wherein
 one of the first inorganic component and the second inorganic component is a hard magnetic material, and   the other is a soft magnetic material.   
     
     
         8 . A method for producing a nanoheterostructure, comprising:
 a first step of preparing a raw material solution by dissolving, in a solvent,   a block copolymer comprising at least a first polymer block component and a second polymer block component which are immiscible but linked to each other,   a first inorganic precursor having a solubility parameter different from that of the first polymer block component by 2 (cal/cm 3 ) 1/2  or less, and   a second inorganic precursor having a solubility parameter different from that of the second polymer block component by 2 (cal/cm 3 ) 1/2  or less; and   a second step including   a phase-separation treatment for forming a nanophase-separated structure in which at least a first polymer phase comprising the first polymer block component with the first inorganic precursor introduced thereinto and a second polymer phase comprising the second polymer block component with the second inorganic precursor introduced thereinto are regularly arranged by self-assembly,   a conversion treatment for converting the first inorganic precursor and the second inorganic precursor to a first inorganic component and a second inorganic component, respectively, and   a removal treatment for removing the block copolymer from the nanophase-separated structure, to thereby obtain a nanoheterostructure comprising the first inorganic component and the second inorganic component.   
     
     
         9 . The method for producing a nanoheterostructure according to  claim 8 , wherein a solubility parameter difference between the first polymer block component and the first inorganic precursor is smaller than a solubility parameter difference between the first polymer block component and the second inorganic precursor. 
     
     
         10 . The method for producing a nanoheterostructure according to  claim 8 , wherein
 a solubility parameter difference between the first polymer block component and the first inorganic precursor is smaller than a solubility parameter difference between the first polymer block component and the second inorganic precursor, and   a solubility parameter difference between the second polymer block component and the second inorganic precursor is smaller than a solubility parameter difference between the second polymer block component and the first inorganic precursor.   
     
     
         11 . The method for producing a nanoheterostructure according to  claim 8 , wherein the solubility parameter difference between the first polymer block component and the second inorganic precursor is more than 2 (cal/cm 3 ) 1/2 . 
     
     
         12 . The method for producing a nanoheterostructure according to  claim 8 , wherein
 the first inorganic precursor has a solubility parameter different from that of the second polymer block component by more than 2 (cal/cm 3 ) 1/2 , and   the second inorganic precursor has a solubility parameter different from that of the first polymer block component by more than 2 (cal/cm 3 ) 1/2 .   
     
     
         13 . The method for producing a nanoheterostructure according to  claim 8 , wherein at least one of the first inorganic precursor and the second inorganic precursor has a solubility parameter different from that of the solvent by 2 (cal/cm 3 ) 1/2  or less. 
     
     
         14 . The method for producing a nanoheterostructure according to  claim 8 , wherein the second step includes a step of carrying out a heat treatment on the raw material solution as the phase-separation treatment, the conversion treatment and the removal treatment. 
     
     
         15 . The method for producing a nanoheterostructure according to  claim 14 , wherein the heat treatment is carried out in an inert gas atmosphere. 
     
     
         16 . The method for producing a nanoheterostructure according to  claim 15 , further comprising, after the heat treatment in the inert gas atmosphere, any one of:
 an oxidization treatment for oxidizing the first inorganic component and the second inorganic component in an oxidizing gas atmosphere; and   a reduction treatment for reducing the first inorganic component and the second inorganic component in a reducing gas atmosphere.   
     
     
         17 . The method for producing a nanoheterostructure according to  claim 8 , wherein
 the nanoheterostructure comprises the first inorganic component and the second inorganic component one of which is a matrix, and the other of which is three-dimensionally and periodically arranged in the matrix, and   the nanoheterostructure has a three-dimensional periodic structure whose average value of one unit length of a repeated structure is 1 nm to 100 nm.   
     
     
         18 . The method for producing a nanoheterostructure according to  claim 17 , wherein the inorganic component three-dimensionally and periodically arranged in the matrix has a shape selected from the group consisting of a spherical shape, a columnar shape, and a gyroid shape.