Mesoporous film, laser emission assembly, and process for producing mesoporous film

Abstract

A novel structure is provided in which mesopores are oriented. Further a mesoporous film is provided which has two-branched diffraction peaks at intervals or 180° according to in-plane X-ray diffraction.

1 . A mesoporous film formed on a substrate face and having tubular mesopores arranged in a state of a honeycomb-packed pore structure, wherein the substrate face has a structural anisotropy, the mesopores are controlled to orient in two directions in planes, and the tubular mesopores are arranged parallel to each other and parallel to the substrate face.  
     
     
         2 . The mesoporous film according to  claim 1 , wherein micelles of amphiphillic molecules are filled in the mesopores.  
     
     
         3 . The mesporous film according to  claim 1 , wherein the wall of the mesopores is formed from a material containing silica.  
     
     
         4 . The mesporous film according to  claim 1 , wherein the size distribution of the mesopores measured by nitrogen gas adsorption has a single maximum, and 60% or more of the mesopores are distributed in the size distribution range of breadth of 10 nm.  
     
     
         5 . The mesporous film according to  claim 1 , wherein, of the two in-plane orientation directions, the region of a first orientation direction and the region of a second orientation direction are substantially the same in area.  
     
     
         6 . The mesporous film according to  claim 1 , wherein the in-plane orientation direction of the mesopores is given by a rubbing treatment, and is controlled by the structural anisotropy of the face of the substrate in two directions, and the direction of the mesopore orientation is the same as the direction of the rubbing treatment.  
     
     
         7 . The mesporous film according to  claim 1 , wherein the in-plane orientation of the mesopores is controlled to two directions by a Langmuir-Blodgett film of a polymer compound having structural anisotropy formed on the face of the substrate, and the orientation direction of the mesopores is the same as the direction of lifting-up of the substrate in the process of the Langmuir-Blodgett film formation.  
     
     
         8 . The mesoporous film according to  claim 1 , wherein a conjugated polymer compound is held in a part or the entire of the mesopores.  
     
     
         9 . A laser emission assembly, comprising the mesoporous film set forth in  claim 8 .  
     
     
         10 . A laser emission assembly, constituted of the mesoporous film set forth in  claim 9  and a medium having a refractivity nearly the same as the refractivity of the substrate carrying the mesoporous film.  
     
     
         11 . A process for producing a mesoporous film including a step of preparing a substrate having a surface structural anisotropy, and a step of bringing the substrate into contact with an aqueous solution containing an inorganic oxide precursor and an amphiphilic substance to form a thin film of a composite of an inorganic oxide and a surfactant having a structure of tubular micelles of the surfactant regularly arranged therein on the substrate face, 
 wherein the composition of the aqueous solution is adjusted to control the tubular molecule micelles to be oriented in two directions in planes.    
     
     
         12 . The process for producing a mesoporous film according to  claim 11 , wherein the process comprises a step of removing the surfactant from the formed thin film of the inorganic oxide-surfactant composite to make the pores of the mesoporous film empty.  
     
     
         13 . A process for producing a mesoporous film including a step of forming a thin film of a polymer compound on a substrate, a step of rubbing treatment of the polymer thin film, and a step of bringing the substrate having the polymer thin film having been rubbing-treated into contact with an aqueous solution containing an inorganic oxide precursor and an amphiphilic substance to form a thin film of a composite of an inorganic oxide and a surfactant having a structure of tubular micelles of a surfactant on the face of the substrate holding the rubbing-treated polymer thin film, 
 wherein the composition of the aqueous solution is adjusted to control the tubular mesopores to be oriented in two directions in planes.    
     
     
         14 . The process for producing a mesoporous film according to  claim 13 , wherein the process comprises a step of removing the surfactant from the thin film containing the formed inorganic oxide-surfactant composite to make the mesopores of the mesoporous film empty.  
     
     
         15 . A mesoporous film in which the in-plane X-ray diffraction spectrum has two-branched diffraction peaks at intervals of 180°.