Chemomechanics of Thin Film Detachment in Liquid-Assisted Transfer Printing

液体辅助转移印刷中薄膜分离的化学力学

• 批准号: 1728149
• 负责人: Baoxing Xu
• 金额: $ 28.27万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1728149&HistoricalAwards=false
• 关键词: Chemomechanics; Thin; Film; Detachment; Liquid

Transfer printing is a technique of assembling layered structures in which a thin film or layers of thin films processed on a source substrate are picked and released onto a target substrate. This operation is performed successively until the desired layered structure is formed. This process is widely used in the fabrication of micro- to nano-scale thin film based devices, especially in the production of flexible electronics. In current practice, the technique relies heavily on trial and error, which results in low yields. This is particularly true for the transfer of thin films with multiple layers or discrete structures, where damage and residual contamination are quite common. This award will focus on the fundamental study of detachment mechanics of thin film-substrate systems in a liquid environment. The outcome of this research will impact the design and execution of transfer printing process through development of simple steps and relationships for high, yet efficient, throughput. This research is an interdisciplinary study involving chemo-mechanics, materials science and manufacturing. Graduate and undergraduate students will be exposed to and trained on a broad scope of education and skills, respectively. Undergraduate students form underrepresented groups will be actively recruited and a university program will be leveraged to perform K-12 outreach. Transfer printing is emerging as a competitive technique in the delivery and assembly of thin films in manufacturing. Its working efficiency is inherently underpinned by the detachment mechanics of thin films from substrates. The liquid-assisted transfer printing technique could promote both yield and quality of the detachment of thin films and involves a synergistic interplay of external mechanical loading and chemical reactions at the solid-liquid interface. The project will conduct a comprehensive study of liquid-assisted interfacial detachment in film-substrate systems, where the presence of liquid water will react with interfacial materials, leading to a controllable and selective detachment of thin film layers. The outcome of this study will be two-fold: 1) a comprehensive chemomechanics theory of liquid-driven detachment mechanics, and 2) a hybrid computational modeling framework that bridges solid-liquid atomistic interactions (mechanism) and continuum phenomena of film detachment (structural function) with validation from experimental testing and theory. The research will impact the transfer printing fabrication technique by providing scientific and technological means to achieving efficient, quantitative throughput.

转印是组装分层结构的技术，其中在源基板上处理的薄膜或薄膜层被拾取并释放到目标基板上。连续地进行该操作，直到形成期望的分层结构。该工艺广泛用于制造基于微米至纳米尺度薄膜的器件，特别是用于柔性电子产品的生产。 在目前的实践中，该技术严重依赖于试错法，这导致产量低。这对于具有多层或离散结构的薄膜的转移尤其如此，其中损坏和残留污染是相当常见的。该奖项将侧重于液体环境中薄膜-基底系统分离力学的基础研究。这项研究的结果将影响转移印刷过程的设计和执行，通过开发简单的步骤和关系，高，但有效的，吞吐量。本研究是一项涉及化学力学、材料科学和制造学的跨学科研究。研究生和本科生将分别接受广泛的教育和技能培训。来自代表性不足群体的本科生将被积极招募，大学课程将被用来进行K-12推广。转移印刷正在成为制造业中薄膜输送和组装的竞争性技术。它的工作效率本质上是由薄膜从衬底上分离的力学支撑的。液体辅助转印技术可以提高薄膜分离的产量和质量，并且涉及外部机械载荷和固液界面处的化学反应的协同相互作用。该项目将对薄膜-基底系统中的液体辅助界面分离进行全面研究，其中液态水的存在将与界面材料发生反应，导致薄膜层的可控和选择性分离。本研究的结果将是双重的：1）液体驱动分离力学的综合化学力学理论，以及2）一个混合计算建模框架，该框架将固体-液体原子相互作用（机制）和膜分离的连续现象（结构功能）与实验测试和理论的验证联系起来。该研究将通过提供科学和技术手段来实现高效、定量的生产量，从而影响转印制造技术。

项目成果

Chemomechanics of transfer printing of thin films in a liquid environment

• DOI: 10.1016/j.ijsolstr.2019.07.011
• 发表时间: 2019-12
• 期刊: International Journal of Solids and Structures
• 影响因子: 3.6
• 作者: Yue Zhang;Bong-Joong Kim;Yuan Gao;Dae Seung Wie;Chi Hwan Lee;Baoxing Xu

Two- and three-dimensional self-folding of free-standing graphene by liquid evaporation

• DOI: 10.1039/c8sm00873f
• 发表时间: 2018-08-07
• 期刊: SOFT MATTER
• 影响因子: 3.4
• 作者: Liu, Qingchang;Xu, Baoxing
• 通讯作者: Xu, Baoxing

A perspective on intelligent design of engineered materials and structures by interface mechanics

• DOI: 10.1016/j.mechrescom.2021.103668
• 发表时间: 2022-01-20
• 期刊: MECHANICS RESEARCH COMMUNICATIONS
• 影响因子: 2.4
• 作者: Xu, Baoxing

Wafer-recyclable, environment-friendly transfer printing for large-scale thin-film nanoelectronics

• DOI: 10.1073/pnas.1806640115
• 发表时间: 2018-07-31
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Wie, Dae Seung;Zhang, Yue;Lee, Chi Hwan
• 通讯作者: Lee, Chi Hwan

Electro-chemo-mechanics theory in transfer printing of thin films in electrolyte solutions

• DOI: 10.1016/j.ijsolstr.2022.111848
• 发表时间: 2022
• 期刊: International Journal of Solids and Structures
• 影响因子: 3.6
• 作者: Yue Zhang;Baoxing Xu