Properties of droplet formation made by cone jet using a novel capillary with an external electrode
Properties of droplet formation made by cone jet using a novel capillary with an external electrode
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DOI：
10.1016/j.elstat.2005.10.016
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发表时间：
2006-07-01
影响因子：
1.8
通讯作者：
Mizuno, Akira
中科院分区：
文献类型：
--
作者：
Yogi, Osamu;Kawakami, Tomonori;Mizuno, Akira
本文提出了一种用于电喷雾锥喷模式的毛细管，该毛细管具有外部电极，可将液滴精确地点在基片表面上。外电极是通过在玻璃毛细管的尖端周围沉积金而制成的。通过向毛细管中的溶液施加正脉冲去电压来进行电喷雾。外加正偏压时，溶液弯月面在针尖处变形更尖锐，弯月面中心延长。这种变形稳定了来自尖端泰勒锥的射流的轨迹。根据实验结果，具有0.3 μ L体积的液滴的定位精度从没有外部电极的常规毛细管的2.5 μ M的标准偏差提高到1.1 μ M。(c)2005年由Elsevier B.V.出版
A capillary with an external electrode for cone-jet mode of electrospray has been developed to spot a droplet accurately on a substrate surface. The external electrode is made by gold deposition around tip of a glass capillary. The electrospray was made by applying a positive pulsed de voltage to the solution in the capillary. Using a positive bias voltage to the external electrode, the meniscus of the solution at the tip deformed to be more sharp, and center of the meniscus was prolonged. This deformation stabilized the trajectory of the jet from the Taylor cone at the tip. From the experimental result, accuracy of positioning of the droplet having 0.3 pL volume was improved with the standard deviation of 1.1 mu m, from that of 2.5 mu M for conventional capillary without the external electrode. (c) 2005 Published by Elsevier B.V.