Capillary-Assisted Printing of Structured Colloidal Monolayers

结构化胶体单层的毛细管辅助打印

• 批准号: 1939362
• 负责人: Xin Yong
• 金额: $ 50万
• 依托单位: SUNY at Binghamton
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1939362&HistoricalAwards=false
• 关键词: Capillary; Assisted; Printing; Structured; Colloidal

Thin films made of micrometer-sized particles can be used in sensing, optical coatings, anti-counterfeiting, and electronics. These applications require that the position and orientation of each particle in the film be tightly controlled. Contemporary manufacturing techniques are unable to provide this level of precision. This award supports fundamental research to create a new additive manufacturing technique that uses the interface of a liquid droplet (a template) to build ordered particle films. The particles are delivered to the surface of the template, where they assemble under the subtle forces that exist at the interface. The droplet evaporates and the particle assembly is mapped to the underlying substrate, creating a dry ordered thin film. The research team will combine computer simulations and experimental testing to discover the relationship between the processing conditions and the characteristics of the thin film deposits. The new knowledge will lead to a scalable platform to manufacture thin film materials with complex patterns from particle building blocks. The educational component of this grant will motivate and train a competitive workforce in advanced manufacturing by focusing on student research experiences and public outreach. A course-based summer program and community activities will be developed to engage students at different levels and the general public. This award will break new ground in engineering thin film materials and contribute to U.S. global leadership in advanced manufacturing.The goal of this project is to create an additive technique for manufacturing dry colloidal monolayers with hierarchical microstructures by exploiting the unique capabilities of interfacial capillary assembly and electrospray targeting. The new method will use a geometrically controlled droplet as a template to assemble two-dimensional crystalline superstructures of microparticles delivered directly to the droplet surface by electrospray. A dry monolayer will be transferred to the underlying structure upon the evaporation of the droplet template. To realize the full application potential of this technique, this research will fill the knowledge gap on the complex interplay of capillary assembly and evaporation-induced transport on non-uniformly curved interfaces. The research team will create surface-evolving models and lattice Boltzmann simulations to predict the interface evolution, droplet hydrodynamics, and particle transport. Advanced flow imaging and particle tracking methods will be applied to validate the model and uncover the underlying physics of structure formation. Electrospray targeting and evaporation experiments will be conducted to test the hypothesis that a surface flow aligned with capillary migration is required to form a structured monolayer in a dry form.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

由微米级颗粒制成的薄膜可用于传感、光学涂层、防伪和电子产品。这些应用要求严格控制膜中每个颗粒的位置和取向。现代制造技术无法提供这种精度。该奖项支持基础研究，以创建一种新的增材制造技术，该技术使用液滴（模板）的界面来构建有序的颗粒膜。粒子被输送到模板的表面，在那里它们在界面处存在的微妙力下聚集。液滴蒸发，颗粒集合体映射到下面的基底上，形成干燥有序的薄膜。研究团队将联合收割机结合计算机模拟和实验测试，以发现加工条件与薄膜沉积物特性之间的关系。新的知识将导致一个可扩展的平台，从颗粒构建块制造具有复杂图案的薄膜材料。该补助金的教育部分将通过专注于学生的研究经验和公众宣传，激励和培训先进制造业的竞争力。将开发以课程为基础的暑期课程和社群活动，以吸引不同层次的学生和公众。该项目的目标是通过利用界面毛细管组装和电喷雾靶向的独特功能，创建一种用于制造具有分层微结构的干胶体单分子层的增材技术。新方法将使用几何控制的液滴作为模板，通过电喷雾组装直接传递到液滴表面的微粒的二维晶体超结构。在液滴模板蒸发时，干燥的单层将被转移到下面的结构。为了实现这项技术的全部应用潜力，这项研究将填补知识空白的复杂相互作用的毛细管组装和蒸发诱导的非均匀弯曲界面上的传输。该研究小组将创建表面演化模型和晶格玻尔兹曼模拟，以预测界面演化，液滴流体动力学和粒子传输。先进的流动成像和粒子跟踪方法将被应用于验证模型，并揭示结构形成的基础物理。电喷雾靶向和蒸发实验将进行测试的假设，表面流动与毛细管迁移对齐，需要形成一个结构化的单层在一个干的form.This奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

Elastocapillary interactions of thermoresponsive microgels across the volume phase transition temperatures

• DOI: 10.1016/j.jcis.2020.09.085
• 发表时间: 2021-02-15
• 期刊: JOURNAL OF COLLOID AND INTERFACE SCIENCE
• 影响因子: 9.9
• 作者: Chen, Shensheng;Yong, Xin
• 通讯作者: Yong, Xin

Viscoelastic necking dynamics between attractive microgels

有吸引力的微凝胶之间的粘弹性颈缩动力学

• DOI: 10.1016/j.jcis.2022.03.048
• 发表时间: 2022
• 期刊: Journal of Colloid and Interface Science
• 影响因子: 9.9
• 作者: Chen, Shensheng;Pirhadi, Emad;Yong, Xin
• 通讯作者: Yong, Xin

Controlling morphology in electrosprayed methylcellulose nanowires via nanoparticle addition: coarse-grained modeling and experiments

通过添加纳米颗粒控制电喷雾甲基纤维素纳米线的形态：粗粒度建模和实验

• 发表时间: 2022
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: J. M. Blisko, M. J.

Probing Colloidal Assembly on Non-Axisymmetric Droplet Surfaces via Electrospray

通过电喷雾探测非轴对称液滴表面上的胶体组装

• DOI: 10.1021/acs.langmuir.2c02729
• 发表时间: 2023
• 期刊: Langmuir
• 影响因子: 3.9
• 作者: Prisaznuk, Joseph M.;Huang, Peter;Yong, Xin;Chiarot, Paul R.
• 通讯作者: Chiarot, Paul R.

Who wins the race near the interface? Stratification of colloids, nano-surfactants, and others

• DOI: 10.1063/5.0098710
• 发表时间: 2022-09-21
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Li, Yifan;Marander, Matthew;Jiang, Shan
• 通讯作者: Jiang, Shan