Epoxy insulated carbon fiber and carbon nanotube fiber microelectrodes.
Epoxy insulated carbon fiber and carbon nanotube fiber microelectrodes.
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DOI：
10.1016/j.snb.2013.03.066
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发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Venton BJ
中科院分区：
文献类型：
--
作者：
Zestos AG;Nguyen MD;Poe BL;Jacobs CB;Venton BJ
碳纤维微电极（CFME）通常由拉成细锥形的玻璃毛细管或外径为90 μm的聚酰亚胺涂层毛细管构成。在这里，开发了一种新的制造方法，用薄的环氧树脂涂层绝缘碳纤维微电极。用激光蚀刻聚四氟乙烯（Teflon）模具，使其具有30-40 μm深和宽的通道，每个通道填充有Armstrong C7环氧树脂。将碳纤维铺设到每个通道中，使得纤维延伸通过模具，并且环氧树脂在烘箱中固化。将纤维的一端修剪至约100 μm以形成圆柱形碳纤维微电极，而另一端连接到针并连接到恒电位仪。环氧树脂绝缘电极进行了测试与快速扫描循环伏安法。对于多巴胺，灵敏度与玻璃和聚酰亚胺涂层毛细管电极相似，线性范围为0.1至10 μM，LOD为24 nM。SU-8环氧树脂作为替代绝缘体进行了测试，因为它在较低的温度下使用光固化，但它更脆。碳纳米管纤维也成功地与环氧树脂绝缘。环氧绝缘CFME用于检测体内刺激的多巴胺释放。环氧树脂绝缘电极的直径比聚酰亚胺涂层的毛细管电极小，适合大规模生产。它们对于在不允许使用玻璃的高等哺乳动物中使用是有利的，并且具有不能在毛细管拉拔器中制造的替代电极材料，例如碳纳米管纤维。
Carbon-fiber microelectrodes (CFMEs) are typically constructed from glass capillaries pulled to a fine taper or from a polyimide-coated capillary that is 90 μm in outer diameter. Here, a new fabrication method is developed to insulate carbon-fiber microelectrodes with a thin epoxy coating. A polytetrafluoroethylene (Teflon) mold was laser etched with channels 30–40 μm deep and wide and each channel filled with Armstrong C7 epoxy. A carbon fiber was laid into each channel so that the fiber extended past the mold, and the epoxy cured in an oven. One end of the fiber was trimmed to about 100 μm to form a cylindrical carbon-fiber microelectrode, while the other end was attached to a pin and connected to a potentiostat. Epoxy-insulated electrodes were tested with fast-scan cyclic voltammetry. For dopamine, the sensitivity is similar to glass and polyimide-coated capillary electrodes with a linear range of 0.1 to 10 μM and a LOD of 24 nM. SU-8 epoxy was tested as an alternative insulator because it cures at a lower temperature using light, but it was more brittle. Carbon nanotube fibers were also successfully insulated with epoxy. Epoxy- insulated CFMEs were used to detect stimulated dopamine release in vivo. Epoxy-insulated electrodes are smaller in diameter than polyimide-coated capillary electrodes and amenable to mass production. They are advantageous for use in higher order mammals, where glass is not permitted, and with alternative electrode materials, such as carbon nanotube fibers, that cannot be fabricated in a capillary puller.
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影响因子：
3
作者：
Ariansen JL;Heien ML;Hermans A;Phillips PE;Hernadi I;Bermudez MA;Schultz W;Wightman RM
通讯作者：
Wightman RM
DOI：
10.1039/b807563h
发表时间：
2009-01
期刊：
The Analyst
影响因子：
--
作者：
Huffman ML;Venton BJ
通讯作者：
Venton BJ
影响因子：
56.9
作者：
Vigolo, B;Pénicaud, A;Poulin, P
通讯作者：
Poulin, P
影响因子：
4.2
作者：
Heien, MLAV;Phillips, PEM;Wightman, RM
通讯作者：
Wightman, RM
基于聚苯二胺作为独特固体离子载体的铅离子选择性电极
影响因子：
6.1
作者：
Huang, Mei-Rong;Rao, Xue-Wu;Ding, Yong-Bo
通讯作者：
Ding, Yong-Bo