Direct writing of flexible electronics through room temperature liquid metal ink.
Direct writing of flexible electronics through room temperature liquid metal ink.
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DOI：
10.1371/journal.pone.0045485
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Liu J
中科院分区：
文献类型：
--
作者：
Gao Y;Li H;Liu J
制造柔性电路的传统方法通常是复杂的、环境不友好的、耗时和能源消耗的，并且因此昂贵。在这里，我们首次描述了使用高性能 GaIn10 基电子墨水（一种被严重忽视的室温液态金属）作为电导体和互连的方法，通过一种相当简单且具有成本效益的方式直接写入柔性电子器件。制备了新一代电子墨水，并改进了其对各种材料的润湿性，使其可以轻松地在环氧树脂板、玻璃、塑料、硅胶、纸张、棉花、纺织品、布料和纤维等一组软质或硬质基材上书写。进行了概念实验，以演示和评估通过本发明的金属墨水直接书写电路的能力。通过一系列基本测量来解释所涉及的机制。通过四点探针法在297 K下测得GaIn10基流体材料的电阻率为34.5 µΩ·cm，并且随着氧量的添加而增加，这表明它是一种优异的金属墨水。导电线可写入厚度约为 10 µm 的特征。通过将液态金属直接写入特定的柔性基板上，可以使多种功能设备（例如显示设计的照明图案的发光二极管（LED）阵列和电风扇）工作。并取得了令人满意的成绩。本方法为直接、快速地编写柔性电子设备开辟了道路，就像在纸上签名或画画一样简单。 GaIn10基液态金属墨水的独特优点在于其熔化温度低、润湿性可控、高导电性和良好的生物相容性。新的电子书写策略和基本原理具有通用性，可以扩展到更多的工业领域，甚至日常生活。
Conventional approaches of making a flexible circuit are generally complex, environment unfriendly, time and energy consuming, and thus expensive. Here, we describe for the first time the method of using high-performance GaIn10-based electrical ink, a significantly neglected room temperature liquid metal, as both electrical conductors and interconnects, for directly writing flexible electronics via a rather easy going and cost effective way. The new generation electric ink was made and its wettability with various materials was modified to be easily written on a group of either soft or rigid substrates such as epoxy resin board, glass, plastic, silica gel, paper, cotton, textiles, cloth and fiber etc. Conceptual experiments were performed to demonstrate and evaluate the capability of directly writing the electrical circuits via the invented metal ink. Mechanisms involved were interpreted through a series of fundamental measurements. The electrical resistivity of the fluid like GaIn10-based material was measured as 34.5 µΩ·cm at 297 K by four point probe method and increased with addition of the oxygen quantity, which indicates it as an excellent metal ink. The conductive line can be written with features that are approximately 10 µm thick. Several functional devices such as a light emitting diode (LED) array showing designed lighting patterns and electrical fan were made to work by directly writing the liquid metal on the specific flexible substrates. And satisfactory performances were obtained. The present method opens the way to directly and quickly writing flexible electronics which can be as simple as signing a name or drawing a picture on the paper. The unique merit of the GaIn10-based liquid metal ink lies in its low melting temperature, well controlled wettability, high electrical conductivity and good biocompability. The new electronics writing strategy and basic principle has generalized purpose and can be extended to more industrial areas, even daily life.
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影响因子：
56.9
作者：
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通讯作者：
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