用于现场溶解氧测量的穿透微电极传感器

Jin-hwan Lee, Tae-Sun Lim, I. Papautsky
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引用次数: 0

摘要

介绍了一种用于生物领域溶解氧(DO)原位测量的新型穿透式微电极阵列(MEA)传感器。该传感器采用基于高频的蚀刻技术,以聚合聚吡咯层作为绝缘体。传感器区域由每个微电极顶端1.7微米凹槽内的金层形成。用Ag/AgCl参比电极测量盐溶液的DO,充分表征了这些DO MEAs的电化学性能。在0 ~ 9 mg/L (0 ~ 21% O2)范围内,DO MEAs具有快速的线性响应。这些新型传感器能够穿透样品进行测量,并且由于其体积小,非常适合于原位操作。
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Penetrating Microelectrode Sensor for In Situ Dissolved Oxygen Measurements
This paper describes a new penetrating micro-electrode array (MEA) sensor for in situ measurements of dissolved oxygen (DO) in bioapplications. The sensor was fabricated using an HF-based etching technique, with a polymerized polypyrrole layer as an insulator. The sensor area was formed by a gold layer inside a 1.7 mum recess at the tip of each microelectrode. Electrochemical performance of these DO MEAs was fully characterized by measuring DO of saline solutions with a Ag/AgCl reference electrode. The DO MEAs exhibited a rapid and linear response in the 0-9 mg/L (0-21% O2) range. These new sensors are able to penetrate samples in order to perform measurements, and are ideally suited for in situ operations due to their small size.
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