Treating fluidic channels

Abstract

Disclosed is the treatment of the interior walls of a fluidic channel with a self-assembled monolayer of an organophosphorus acid.

1 . A method of depositing a thin coating of nanometer dimensions within a fluidic channel comprising:
 (a) contacting interior walls of the fluidic channel either directly or indirectly through an intermediate organometallic coating with a an organophosphorus acid,   (b) forming a self-assembled monolayer of the organophosphorus acid adhered to the interior walls of the fluidic channel or to the intermediate organometallic layer.   
     
     
         2 . The method of  claim 1  in which the fluidic channel is a closed fluidic circuit. 
     
     
         3 . The method of  claim 1  in which the fluidic channel is an open fluidic channel. 
     
     
         4 . The method of  claim 3  in which the open fluidic channel is associated with a dispensing device. 
     
     
         5 . The method of  claim 2  in which the open fluidic channel is associated with a radiator. 
     
     
         6 . The method of  claim 1  in which the fluidic channel is made from metal. 
     
     
         7 . The method of  claim 6  in which the fluidic channel is made from iron. 
     
     
         8 . The method of  claim 6  in which the metal is a metal alloy. 
     
     
         9 . The method of  claim 6  in which the metal alloy is stainless steel. 
     
     
         10 . The method of  claim 6  in which the self-assembled monolayer is chemically bonded to the metal. 
     
     
         11 . The method of  claim 1  in which the organophosphorus acid is contacted with the intermediate organometallic layer. 
     
     
         12 . The method of  claim 1  in which the organometallic layer is a polymeric metal oxide having unreacted alkoxide and/or hydroxyl groups. 
     
     
         13 . The method of  claim 12  in which the substrate is a polymeric material. 
     
     
         14 . The method of  claim 13  in which the self-assembled monolayer is chemically bonded to the organometallic layer. 
     
     
         15 . The method of  claim 1  in which the organophosphorus acid is an organophosphonic acid. 
     
     
         16 . The method of  claim 15  in which the organophosphorus acid is an organophosphonic acid or derivative thereof comprising a compound or a mixture of compounds of the structure: 
       
         
           
           
               
               
           
         
         wherein x is 0 to 1, y is 1, z is 1 to 2 and x+y+z=3; R and R″ are each independently a hydrocarbon or substituted hydrocarbon radical having a total of 1 to 30 carbon atoms or an oligiomeric group, R′ is H, a metal or lower alkyl. 
       
     
     
         17 . The method of  claim 16  where R and R″ are each independently a fluorine-substituted hydrocarbon radical. 
     
     
         18 . The method of  claim 16  in which R and/or R″ is a group of the structure: 
       
         
           
           
               
               
           
         
         where A is an oxygen radical or a chemical bond; n is 1 to 6; Y is F or  C   n F 2n+1 ; b is 2 to 20, m is 0 to 6 and p is 0 to 18. 
       
     
     
         19 . A fluidic channel having interior walls with a self-assembled monolayer of an organophosphorus acid adhered directly or through an intermediate organometallic coating to the interior walls. 
     
     
         20 . The fluidic channel of  claim 19 , which is a closed fluidic circuit. 
     
     
         21 . The fluidic channel of  claim 19 , which is an open fluidic channel. 
     
     
         22 . The fluidic channel of  claim 21  in which the open fluidic channel is associated with a dispensing device. 
     
     
         23 . The fluidic channel of  claim 20 , which is associated with a radiator. 
     
     
         24 . The fluidic channel of  claim 19 , which is made from metal. 
     
     
         25 . The fluidic channel of  claim 24 , which is made from iron. 
     
     
         26 . The fluidic channel of  claim 24 , which is a metal alloy. 
     
     
         27 . The fluidic channel of  claim 24 , which is stainless steel. 
     
     
         28 . The fluidic channel of  claim 19  in which the self-assembled monolayer is chemically bonded to the metal. 
     
     
         29 . The fluidic channel of  claim 19  in which the organophosphorus acid is adhered to the intermediate organometallic layer. 
     
     
         30 . The fluidic channel of  claim 29  in which the organometallic layer is a polymeric metal oxide having unreacted alkoxide and/or hydroxyl groups. 
     
     
         31 . The fluidic channel of  claim 19 , which is a polymeric material. 
     
     
         32 . The fluidic channel of  claim 29  in which the self-assembled monolayer is chemically bonded to the organometallic layer. 
     
     
         33 . The fluidic channel of  claim 19  in which the organophosphorus acid is an organophosphonic acid. 
     
     
         34 . The fluidic channel of  claim 19  in which the organophosphorus acid is an organophosphonic acid or derivative thereof comprising a compound or a mixture of compounds of the structure: 
       
         
           
           
               
               
           
         
         wherein x is 0 to 1, y is 1, z is 1 to 2 and x+y+z=3; R and R″ are each independently a hydrocarbon or substituted hydrocarbon radical having a total of 1 to 30 carbon atoms or an oligomeric group, R′ is H, a metal or lower alkyl. 
       
     
     
         35 . The fluidic channel of  claim 34  where R and R″ are each independently a fluorine-substituted hydrocarbon radical. 
     
     
         36 . The fluidic channel of  claim 34  in which R and/or R″ is a group of the structure: 
       
         
           
           
               
               
           
         
         where A is an oxygen radical or a chemical bond; n is 1 to 6; Y is F or C n F 2n+1 ; b is 2 to 20, m is 0 to 6 and p is 0 to 18.