Reliable transfer enabled by UV-curable stamp with tunable rigidity

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2024-10-30 DOI:10.1016/j.surfin.2024.105348

Lei Chen , Yuan Niu , Cuihong Liu , Runhong Fan , Peng Liu , Dongxu Ma , Xiaoqing Zhang , Chengzhi Liu , Huigao Duan

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Abstract

Transfer printing enables the fabrication of flexible electronics by transferring devices from donor to receiver substrates. However, using an elastic stamp can cause strain and damage during transfer. A rigid stamp can solve this issue, but rigid materials are unsuitable for flexible electronics. In this study, we present a transfer approach using a UV-curable polyurethane acrylate film as a stamp with solvent-induced mechanical properties, from rigidity to elasticity. During the transfer, the UV-curable film is tuned to be rigid to prevent damage to the transferred materials caused by strain during peeling. The approach enables the intact transfer of metallic structures, including various multi-scale Ag patterns with the highest resolution of 10 μm, high transfer yield, and scalability. The interfacial mechanisms of metal transfer were analyzed. The results demonstrate that surface modification through increasing contact angles, improve the stability of metal transfer. When soaked in ethanol, the film becomes soft and elastic, making it an ideal flexible substrate for fabricating electronics, especially for applications in sensing, healthcare, and artificial skin.

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可调节硬度的紫外线固化印章可实现可靠的转印

通过转印，可以将器件从供体基底转印到受体基底，从而制造出柔性电子器件。然而，使用弹性印章可能会在转移过程中造成应变和损坏。刚性印章可以解决这个问题，但刚性材料不适合柔性电子器件。在本研究中，我们提出了一种使用紫外线固化聚氨酯丙烯酸酯薄膜作为印章的转移方法，这种印章具有溶剂诱导的机械特性，从刚性到弹性。在转移过程中，紫外线固化薄膜被调整为刚性，以防止在剥离过程中因应变而损坏转移材料。该方法实现了金属结构的完整转移，包括各种多尺度银色图案，最高分辨率达 10 μm，转移产量高，可扩展性强。对金属转移的界面机制进行了分析。结果表明，通过增大接触角进行表面改性可以提高金属转移的稳定性。当薄膜浸泡在乙醇中时，会变得柔软而富有弹性，使其成为制造电子器件的理想柔性基底，特别是在传感、医疗保健和人造皮肤方面的应用。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)