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Swelling and delamination of multi-electrode sensor arrays studied by variable-pressure scanning electron microscopy

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Lemoine, P, Mailley, P, Hyland, M, McLaughlin, JAD, McAdams, ET, Anderson, JMCC, Lynch, A, Diamond, D and Leader, M (2000) Swelling and delamination of multi-electrode sensor arrays studied by variable-pressure scanning electron microscopy. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, 50 (3). pp. 313-321. [Journal article]

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Multi-electrode sensor arrays are made of soft and wet materials not easily examined by most microscopic techniques. in this paper, we have demonstrated that low-vacuum scanning electron microscopy (LVSEM) and energy-dispersive X-ray analysis (EDX) are adequate for studying the hydration, swelling, and possible delamination of multi-electrode sensor arrays. We found that the LVSEM environment had no detectable effect on the morphology of Na+, K+, and Ca++ sensors, and EDX analysis indicated that all three membranes have similar compositions. However, once hydrated, the sensors exhibited different behaviors. The K+ and Ca++ sensors swelled more than the Na+ sensor did. This swelling is due principally to water sorption in the membrane. We believe that the larger thickness of the K+ and Ca++ membrane is partly responsible for the observed swelling effect. A simple Griffith analysis of the interface rupture confirms the experimental evidence that these thicker membranes also are more prone to delamination failure. (C) 2000 John Wiley & Sons, Inc.

Item Type:Journal article
Keywords:multi-electrode sensor array; low-vacuum SEM; swelling; delamination; peel stresses
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:18914
Deposited By:Mrs Ann Blair
Deposited On:19 Jul 2011 08:54
Last Modified:19 Jul 2011 08:54

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