Ring crystalline body and production method thereof

Abstract

To provide a ring crystalline body, which is a ring crystalline body with a small diameter and formed with a thin line and capable of providing electric conduction along the ring, and to provide a production method of the ring crystalline body. A droplet is stuck to a surface of a substrate and then the droplet is evaporated to a discontinuous underlayer ring having an ultrafine three-dimensional structure on the substrate surface. After that, when a transition metal dichalcogenide, a transition metal trichalcogenide, or a low-dimensional conductor as raw material gas is evaporated, a ring crystalline body comprising the raw material is grown along the underlayer ring.

What is claimed is:  
     
         1 . A ring crystalline body comprising a circularly continuous crystalline transition metal dichalcogenide or transition metal trichalcogenide.  
     
     
         2 . A ring crystalline body comprising a circularly continuous crystalline low-dimensional conductor.  
     
     
         3 . The ring crystalline body according to  claim 1  or  claim 2 , wherein the crystallinity is a single crystal.  
     
     
         4 . A production method of a ring crystalline body comprising the steps of: 
 forming a continuous or discontinuous underlayer ring having an ultrafine three-dimensional structure in the substrate surface; and    circularly growing a crystal along the underlayer ring.    
     
     
         5 . The production method according to  claim 4 , wherein the underlayer ring is formed by sticking droplets of an underlayer ring material to the substrate surface and evaporating the droplets.  
     
     
         6 . The production method according to  claim 4 , wherein the crystal is grown by evaporation.  
     
     
         7 . The production method according to  claim 4 , wherein the crystal is grown by sputtering.