Structural Control of Macroporous Noble Metals as Glucose Sensing Electrode Materials
Abstract:Macroporous (mp-) Pt films, which were obtained by electrolytic deposition of Pt on polymethylmethacrylate (PMMA) template films and subsequent removal of PMMA, were investigated as an electrode material for a glucose sensor. The PMMA template films had a comparatively ordered three-dimensional (3D) array, and then the resulting mp-Pt films also showed the structure reflecting the template films. This macroporous structure with a high specific surface area resulted in an increase in glucose response and an extension of the detection limit, because of the large active area of immobilized glucose oxidase (GOD). The effects of mediator immobilization and the kind of GOD immobilization methods on the glucose sensing properties were also studied. Among the electrodes tested, the mp-Pt electrode, on which an appropriate amount of GOD was immobilized by dripping technique and the mediator was sandwiched between the mp-Pt and GOD layer, showed the highest glucose sensing properties. It was also revealed that the thin and uniform immobilization of GOD was effective for improving the response stability.
Document Type: Research Article
Publication date: December 1, 2008
More about this publication?
- The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites