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)
|Deposited By:||Mrs Ann Blair|
|Deposited On:||19 Jul 2011 07:54|
|Last Modified:||19 Jul 2011 07:54|
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