Potentiostatic preparation of molecular adsorbates for scanning probe microscopy
First Claim
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1. A method of preparing molecular adsorbates for scanning probe microscopy comprising:
- loading a substrate into a cell;
placing the cell on a scanning probe microscope;
placing a clean reference electrode in said cell;
placing a clean counter electrode in said cell in spaced relationship to said reference electrode;
dissolving a polymer containing negatively charged molecules into a buffer solution that is inert relative to said substrate;
filling said cell with said polymer .[.contained.]. .Iadd.containing .Iaddend.buffer solution;
activating said reference electrode and said counter electrode and applying a potential to said substrate to deposit and secure said polymer onto said substrate for examination by said microscope.
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Abstract
.[.A method of.]. .Iadd.An apparatus and method for .Iaddend.preparing molecular adsorbates for scanning probe microscopy by potentiostatic methods. Negatively charged molecules are deposited upon and held to a substrate with an electrochemical cell having a gold substrate, a platinum wire counter electrode and a silver wire reference electrode. The polymer to be observed is dissolved into a buffer solution which is non-reactive with the substrate which is gold (111).
119 Citations
14 Claims
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1. A method of preparing molecular adsorbates for scanning probe microscopy comprising:
- loading a substrate into a cell;
placing the cell on a scanning probe microscope;
placing a clean reference electrode in said cell;
placing a clean counter electrode in said cell in spaced relationship to said reference electrode;
dissolving a polymer containing negatively charged molecules into a buffer solution that is inert relative to said substrate;
filling said cell with said polymer .[.contained.]. .Iadd.containing .Iaddend.buffer solution;
activating said reference electrode and said counter electrode and applying a potential to said substrate to deposit and secure said polymer onto said substrate for examination by said microscope. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- loading a substrate into a cell;
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12. A method of preparing molecular adsorbates for scanning probe microscopy comprising:
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loading a substrate into a cell; placing the cell on a scanning probe microscope; placing a clean reference electrode in said cell; placing a clean counter electrode in said cell in spaced relationship to said reference electrode; dissolving a polymer containing charged molecules into a buffer solution that is inert relative to said substrate; filling said cell with said polymer containing buffer solution; activating said reference electrode and said counter electrode; and applying a potential between said substrate and said counter electrode to deposit and secure said polymer onto said substrate for examination by said microscope..Iaddend..Iadd.13. A method according to claim 12 in which said substrate comprises gold..Iaddend..Iadd.14. A method according to claim 12 in which said reference electrode is silver wire..Iaddend..Iadd.15. A method according to claim 12 in which said - View Dependent Claims (13)
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14. wire..Iaddend..Iadd.31. An electrochemical fluid cell and substrate assembly according to claim 28 wherein said reference electrode is silver wire..Iaddend..Iadd.32. An electrochemical fluid cell and substrate assembly according to claim 28 wherein said counter electrode is platinum wire..Iaddend..Iadd.33. An electrochemical fluid cell and substrate assembly according to claim 28 wherein said reference electrode is silver wire and said counter electrode is platinum wire..Iaddend..Iadd.34. An electrochemical fluid cell and substrate assembly for use in studying molecular adsorbates with a scanning probe microscope, said cell comprising:
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an electrically conductive substrate; an electrically insulating cell wall having an inner boundary defining a fluid container open at its top, said fluid container having a bottom boundary defined by said substrate; said substrate in electrical contact with a conductor having a portion extending under and beyond said inner boundary; a reference electrode extending from beyond said fluid container into said fluid container through said top; a counter electrode extending from beyond said fluid container into said fluid container through said top and maintained in spaced relationship to said reference electrode; a voltage potential capable of being applied to said substrate by connecting said voltage potential to said electrically conductive substrate at said portion of said conductor extending under and beyond said inner boundary..Iaddend..Iadd.35. An electrochemical fluid cell and substrate assembly according to claim 34 wherein said substrate comprises gold..Iaddend..Iadd.36. An electrochemical fluid cell and substrate assembly according to claim 34 wherein said reference electrode is silver wire..Iaddend..Iadd.37. An electrochemical fluid cell and substrate assembly according to claim 34 wherein said counter electrode is platinum wire..Iaddend..Iadd.38. An electrochemical fluid cell and substrate assembly according to claim 35 wherein said reference electrode is silver wire..Iaddend..Iadd.39. An electrochemical fluid cell and substrate assembly according to claim 35 wherein said counter electrode is platinum wire..Iaddend..Iadd.40. An electrochemical fluid cell and substrate assembly according to claim 35 wherein said reference electrode is silver wire and said counter electrode is platinum wire. .Iaddend.
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Specification