设计了一种新型的基于电液动力学的喷头,该喷头内含一个可伸缩的针尖.由这种喷头组成的喷印系统,在不同的条件下可以产生离散的点和珠状结构两种喷射模式.结果表明:溶液浓度是区分这两种喷射模式的关键因素.当喷射溶液的浓度比较低时,喷印系统喷射出离散的圆点;当较高时,喷射出珠状结构.其珠状结构中珠子的直径随着系统供液速率的增加而变大,随着PEO溶液浓度的提高和针尖频率的增加而减小.改变收集板的移动速度,可以改变喷射沉积物形态,且该系统的喷射频率与可伸缩针尖的运动频率之间有很好的线性相关性.
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