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嘉宾介绍
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贠国霖
剑桥大学
柔性传感中的液态金属复合材料
Flexible conductive composites combine the conductivity of fillers with the flexibility of polymers, and are therefore widely used in flexible sensors and soft robotics. However, most conventional composites face performance deficiencies such as low sensitivity, limited functionality, and poor conductivity when stretched, which restricts their applications in soft devices. In this talk, I will introduce a new family of multiscale structured stretchable composites with embedded liquid metals that addressing this challenge. Specifically, I proposed the first ever liquid metal hybrid elastomer with unconventional strain response, with a several-magnitude increase in conductivity under any mechanical loading. On this basis, I created composites with unprecedented anisotropic piezoresistivity and high sensitivity through multi-scale structured design. Their applications in ultrasensitive flexible sensors, self-sensing actuators, and intelligent systems demonstrate performance superior to state-of-the-arts. Based on a liquid metal elastomers with self-adjustable resistance and stiffness, I also demonstrated an active control method of mechanical systems without external control. Owing to its unique electromechanical properties, these liquid metal composites shows broad application prospects in advanced sensors and flexible wearable electronics.
柔性导电复合材料兼具填料的导电性和聚合物的柔韧性，在柔性传感器和软体机器人中得到广泛应用。然而，大多数传统复合材料存在灵敏度低、功能单一、拉伸时导电性衰减等性能缺陷，限制了它们在柔性设备中的应用。为应对这一挑战，我将介绍一种具有多尺度结构设计的新型液态金属多填料复合材料。具体来说，我提出了一种具有非常规应变响应的液态金属混合弹性体，在任何机械载荷下，其电导率都可以提高几个数量级。在此基础上，我通过多尺度结构化设计，创建了具有各向异性压阻效应和极高压力灵敏度的复合材料。它们在超灵敏柔性传感器、自感知执行器和智能系统中的应用表现远超最先进的技术。基于具有可自调节电阻和刚度的液态金属弹性体，我还展示了一种无需外部控制的机械系统主动调控方法。由于其独特的机械和电学性能，这些液态金属复合材料在先进传感器和可穿戴电子设备中展现出广阔的应用前景。
Dr. Guolin Yun is a Royal Society Newton International Fellow in the Department of Engineering at the University of Cambridge. He received his B.S. in Theoretical and Applied Mechanics in 2017 from the University of Science and Technology of China, and his Ph.D. in Mechanical Engineering in 2021 from the University of Wollongong, Australia. His research focus is on the multiscale structured hybrid-filler elastomers with embedded liquid metals, as well as their applications in flexible sensors and stretchable electronics. To date, he has contributed 35 publications to this field in journals such as Nature Communications, Science Advances, Advanced Science, Matter, Advanced Functional Materials, etc., attracted over 1400 citations with an h-index of 17. His research have been widely reported by academic media such as Phys.Org and China Science Daily.
贠国霖博士是剑桥大学工程学院的皇家学会牛顿国际学者。他于2017年本科毕业于中国科学技术大学近代力学系，获得理论与应用力学学士学位，2021年获得澳大利亚伍伦贡大学机械工程博士学位。2022年作为英国皇家学会牛顿国际学者加入剑桥大学工程学院。他的研究重点是嵌入液态金属的多尺度结构化混合填料复合材料，以及它们在柔性传感器和可拉伸电子产品中的应用。迄今为止在Nature Communications、Science Advances、Advanced Science、Matter、Advanced Functional Materials等国际期刊上发表了30余篇SCI论文，引用1400余次，其成果得到了Phys.Org，中国科学报等学术媒体的广泛报道。
潘程枫
浙江大学
软物质材料：从结构设计到生物医学与软体机器人应用
Soft materials exhibit limitless possibilities and potentials to revolutionize various technological domains due to their inherent mechanical flexibility, stretchability, and biocompatibility. Unlike traditional rigid materials, soft materials can conform to complex surfaces, endure significant deformation, and interact seamlessly with biological tissues. These unique properties make them excellent candidates for a wide range of applications that require adaptability and resilience. This presentation focuses on liquid metal based materials architecture design and applications of soft matter in soft electronics, biomedical engineering, and soft robotics.
软物质材料由于其如组织般的机械柔性、可延展性和优异的生物相容性等独特性质，已在众多领域展现出了良好的应用前景。软物质材料的宏观性能不仅取决于基体和增强体的材料本征特性，而且与各组分之间的微纳复合结构也有着密切的关系。本报告以液态金属为典型增强体材料，从软纸质材料微纳结构设计出发，介绍近年团队在智能材料方面取得的突破性成果，以及它们在生物医学和软体机器人领域的应用。
Dr. Chengfeng Pan is an assistant professor of Mechanical Engineering, Zhejiang University. Dr. Pan received his Ph.D. degree at Aug 2020, from the Department of Mechanical Engineering, Carnegie Mellon University. Then, he joined the Chinese University of Hong Kong employed as researcher associate. In 2023, he starts his faculty position as assistant professor of Mechanical Engineering at Zhejiang University. The research interests of Dr. Pan are soft matter development and their applications in soft electronics, biomedical engineering and soft robotics. Dr. Pan has published more than 40 peer-reviewed papers, including the papers in Nature Materials, Nature Electronics, Nature Nanotechnology, Science Robotics, Science Advances, Nature Communications, Advanced Materials, Matter. Dr. Pan also won the Outstanding Young Scientist Awarded by Microsystems & Nanoengineering (2024).
潘程枫，博导，优青（海外），浙江大学“百人计划”研究员，浙江大学医学院附属第二医院急诊医学科兼聘教授。分别于2013年和2016年在北京交通大学和中山大学生物医学工程获得学士和硕士学位，2020年在卡内基梅隆大学机械工程系获得博士学位，随后加入香港中文大学机械与自动化系担任副研究员，2023年加入浙江大学机械与工程学院担任”百人计划”研究员。主要研究方向为软物质材料设计与制造、医用柔性可穿戴设备及软体机器人。在Nature Materials, Nature Electronics, Nature Nanotechnology, Science Robotics, Science Advances, Nature Communications, Advanced Materials, Matter等期刊论文上发表论文40余篇。获2024年度MINE青年科学家称号。
汪鸿章
清华大学
液态金属相变智能弹性体与软体机器人
The transition of matter from solid to liquid state in nature is a fundamental and ancient physical phenomenon, ubiquitous in everyday life. For instance, the ancient sayings "water droplets turn into ice" and "candles weeping" vividly depict these common solidification and melting processes. Metals, due to their exceptional properties, play an indispensable role in modern industry. However, the high melting points of many metals pose significant challenges for the study and application of reversible phase transitions in metals. Room-temperature liquid metals, as a class of materials with unique physicochemical properties, have garnered increasing attention in recent years; their potential in various key research fields and high-tech industries is continuously being unearthed. Particularly, gallium-based liquid metals, with their melting points near room temperature, can achieve reversible solid-liquid phase transitions under relatively mild conditions. During this process, the material's optical, thermal, mechanical, and electrical properties undergo significant changes, providing an ideal platform for in-depth study and utilization of metal solid-liquid phase transition characteristics. The report will focus on the multi-stimuli triggered phase transition behavior of liquid metal elastomer materials, exploring how performance regulation can expand their applications in smart sensing, soft robotics, energy storage, and other fields.
自然界中物质从固态到液态的转变是一个基本而古老的物理现象，它在日常生活中无处不在，比如古语中所说的“滴水成冰”和“蜡烛垂泪”就形象地描绘了这些常见的凝固和熔化过程。金属因其卓越的特性，在现代工业中扮演着不可或缺的角色。然而，许多金属的熔点较高，这给研究和应用金属的可逆相变过程带来了不小的挑战。而室温液态金属作为一类具有独特物理化学性质的材料近年来得到了越来越多的关注；其在多个关键研究领域和高科技产业的潜力也不断被挖掘出来。特别是以镓为基础的液态金属，由于其室温附近的熔点，可以在相对温和的条件下实现可逆的固液相变。这一过程中，材料的光学、热学、力学和电学性能会发生显著变化，为深入研究和利用金属固液相变特性提供了一个理想的平台。报告将重点介绍液态金属弹性体材料的多刺激触发相变行为，探讨如何通过性能调控来拓展其在智能传感、软体机器人、能源存储等领域的应用。
Hongzhang Wang, a Special Researcher and Ph.D. supervisor at Tsinghua University Shenzhen International Graduate School, mainly engages in research on liquid metal smart materials and their applications in soft robot actuation and sensing. He has published over 50 academic papers in journals such as Science Advances, Nature Review Materials, Matter, Advanced Materials, and holds 10 national authorized invention patents, as well as authoring 2 book chapters. The liquid metal phase change machines he designed were selected for extraterrestrial experimental plans. He has presided over the National Natural Science Foundation of China and was selected for the Young Talent Support Project of the Chinese Society of Mechanical Engineering. He serves as a young editorial board member for journals The Innovation (IF: 32.1), Soft Science, and Wearable Electronics. He has received the highest honor of Tsinghua University's special scholarship (10/30000), Tsinghua University Shuimu Scholar, Beijing Outstanding Doctoral Dissertation, Tsinghua University Outstanding Graduate, and Tsinghua University Outstanding Doctoral Dissertation, among other honors. His research achievements have been reported by media outlets such as CCTV, Dragon TV, China International Broadcasting Network, Science and Technology Daily, and Economic Daily.
汪鸿章，清华大学深圳国际研究生院特别研究员、博士生导师，主要从事液态金属智能材料及其在软体机器人驱动和传感领域应用研究。在Science Advances, Nature Review Materials，Matter, Advanced Materials等期刊发表学术论文 50余篇，获得国家授权发明专利10项，出版专著2章节。所设计液态金属相变机器入选外太空实验计划。主持国家自然科学基金，入选中国工程机械学会青年人才托举工程。担任期刊The Innovation（IF: 32.1）、Soft Science、Wearable Electronics青年编委。曾获得清华大学学生最高荣誉特等奖学金（10/30000）、清华大学水木学者、北京市优秀博士学位论文、清华大学优秀毕业生、清华大学优秀博士学位论文等荣誉。研究成果曾获中央电视台、东方卫视、国家外文局电视台、科技日报、经济日报等媒体报道。
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主持人
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袁博
北京航空航天大学
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研讨嘉宾
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汤剑波
西湖大学
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