Brewton-Parker College: A Private Christian/Baptist College located in Southeast Georgia Mathematics and Natural Sciences: Biology, Chemistry, Mathematics, PhysicsMathematics and Natural Sciences: Biology, Chemistry, Mathematics, PhysicsMathematics and Natural Sciences: Biology, Chemistry, Mathematics, PhysicsMathematics and Natural Sciences: Biology, Chemistry, Mathematics, Physics

Home / Academics / Division of Math & Science / Faculty / Christopher Jones / Dissertation / Chapter 2-Section 2.5

2.5 Preparation of Thin Film Superconductor Electrodes

With this background material in mind, methods had to be developed to examine the electrochemical response at thin film electrodes due to the fact that they cannot be mechanically resurfaced given the 1000 thickness of films.

Schematic diagram of a thin film electrodes where a) is the superconducting thin film deposited on an insulating substrate, b) is a superconducting thin film electrode electrically connected by a brass clip, and c) is a superconducting thin film electrode electrically connected by conducting copper tape and a brass clip.

Illustration 2.4: Schematic diagram of a thin film electrodes where a) is the superconducting thin film deposited on an insulating substrate, b) is a superconducting thin film electrode electrically connected by a brass clip, and c) is a superconducting thin film electrode electrically connected by conducting copper tape and a brass clip.

Thin films of YBa2Cu3O7-x were made into electrodes by simply attaching a wire to the thin film via a brass clip. To increase the stability of the contact and the contact area, conductive copper tape is placed tightly under the clip and over the top portion of the film. Illustration 2.4 shows a schematic of a thin film electrode. The back of the thin film has Ag paint or Au paste on the reverse side from the laser ablation process. To prevent the back from being involved in the electrochemistry, the Ag paint or Au paste is scraped off and usually covered with Apiezon wax. During electrochemical measurements, care is taken to prevent solution contact with the copper tape or brass clip.

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Updated on: April 15, 2010 8:26 PM