Structure-property relationships in novel conjugated mixed conductors

新型共轭混合导体的结构-性能关系

• 批准号: 1808401
• 负责人: Alberto Salleo
• 金额: $ 37万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808401&HistoricalAwards=false
• 关键词: Structure; property; relationships; novel; conjugated

Nontechnical description: Soft materials that have the ability to transport both ions and electrons are of great interest for use at the interface between electronics and biology. Indeed, biology works by shuttling ions while electronic systems work by moving electrons. Mixed conductors, that transport both ions and electrons, can act as translators between biological signals and electronic devices. Potential applications of these materials include biosensors, neural probes, and drug delivery systems. In this project, new plastic materials exhibiting mixed conduction are studied. In particular, the structure of these materials is correlated with their ability to transport ions and electrons. Advanced materials characterization techniques using X-rays and electron beams are used to analyze the structure of these plastics down to the molecular level, in order to determine what limits their performance. Ultimately, these insights allow to design and synthesize higher performance materials. Scientific advances resulting from the project are incorporated in undergraduate and graduate classes. The educational outreach is completed by enrolling undergraduate students to join the project during the Summer Quarter, with a focus on recruiting through the Engineering Diversity Program. An additional program, the Art + Science program at Stanford is leveraged to broaden the undergraduate experience through interactions with the Cantor Museum aimed at studying the materiality of art objects. Finally, the interdisciplinary nature of the research project provides a broad educational training to the graduate student involved in it, which greatly facilitates the student's insertion in the biotech industry workforce.Technical description: Polymers that exhibit mixed ionic and electronic conduction have the ability to transduce ionic fluxes, the language of biology, into electrical currents, which can be manipulated by conventional electronics. The goal of the project is to understand how ion penetration and electronic carrier transport are affected by the microstructure of a new family of polymeric mixed conductors. In particular, the effect of crystalline texture, degree of crystallinity and mesoscopic organization of the crystallites is studied. Advanced X-ray diffraction techniques and a new scanning nanobeam microscopy technique are used to analyze the microstructure. The microstructure is correlated to performance, as characterized using electrochemical methods. The ultimate goal is to determine materials design rules, which will be confirm by studying potentially high-performing materials. Healthcare is being revolutionized by the confluence of engineering and medical sciences. Soft materials that exhibit mixed conduction have a role to play because of their outstanding electrical properties combined with a low modulus. New high-performance materials are ideally placed to play an important role in this space. Finally, the project trains a student with an interdisciplinary outlook, ready to enter this nascent industry.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.

非技术性描述：具有传输离子和电子的能力的软材料对于在电子学和生物学之间的界面处使用具有极大的兴趣。事实上，生物学通过穿梭离子来工作，而电子系统通过移动电子来工作。混合导体既可以传输离子又可以传输电子，可以作为生物信号和电子设备之间的翻译器。这些材料的潜在应用包括生物传感器、神经探针和药物递送系统。在本项目中，研究了表现出混合导电性的新型塑料材料。特别地，这些材料的结构与它们传输离子和电子的能力相关。使用X射线和电子束的先进材料表征技术用于分析这些塑料的结构，直至分子水平，以确定限制其性能的因素。最终，这些见解允许设计和合成更高性能的材料。从该项目产生的科学进步被纳入本科生和研究生班。教育推广是通过招收本科生在夏季季度加入该项目完成的，重点是通过工程多样性计划招聘。另一个项目是斯坦福大学的艺术+科学项目，该项目通过与康托博物馆的互动来扩大本科生的经验，旨在研究艺术品的物质性。最后，该研究项目的跨学科性质为参与研究的研究生提供了广泛的教育培训，这极大地促进了学生进入生物技术行业的劳动力队伍。技术描述：具有混合离子和电子导电性的聚合物具有将离子通量（生物学语言）转化为电流的能力，可以通过传统的电子技术进行操纵。该项目的目标是了解离子渗透和电子载流子传输是如何受到一个新的聚合物混合导体家族的微观结构的影响。特别是，晶体织构，结晶度和介观组织的微晶的效果进行了研究。先进的X射线衍射技术和一种新的扫描纳米束显微镜技术被用来分析的微观结构。微观结构与性能相关，其特征在于使用电化学方法。最终目标是确定材料设计规则，并通过研究潜在的高性能材料来确认。工程学和医学科学的融合正在彻底改变医疗保健。表现出混合导电性的软材料由于其出色的电气性能和低模量而发挥作用。新型高性能材料是在这一领域发挥重要作用的理想选择。最后，该项目培养了一名具有跨学科视野的学生，为进入这一新兴行业做好了准备。该奖项反映了NSF的法定使命，并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，被认为值得支持。

项目成果

Tuning Organic Electrochemical Transistor Threshold Voltage using Chemically Doped Polymer Gates

使用化学掺杂聚合物栅极调节有机电化学晶体管阈值电压

• DOI: 10.1002/adma.202202359
• 发表时间: 2022
• 期刊: Advanced Materials
• 影响因子: 29.4
• 作者: Tan, Siew Ting Melissa;Lee, Gijun;Denti, Ilaria;LeCroy, Garrett;Rozylowicz, Kalee;Marks, Adam;Griggs, Sophie;McCulloch, Iain;Giovannitti, Alexander;Salleo, Alberto
• 通讯作者: Salleo, Alberto

Mixed Ionic–Electronic Conduction, a Multifunctional Property in Organic Conductors

• DOI: 10.1002/adma.202110406
• 发表时间: 2022-04
• 期刊: Advanced Materials
• 影响因子: 29.4
• 作者: Siew Ting Melissa Tan;Aristide Gumyusenge;T. Quill;G. LeCroy;G. Bonacchini;Ilaria Denti;A. Salleo

Role of the Anion on the Transport and Structure of Organic Mixed Conductors

• DOI: 10.1002/adfm.201807034
• 发表时间: 2019-02-01
• 期刊: ADVANCED FUNCTIONAL MATERIALS
• 影响因子: 19
• 作者: Cendra, Camila;Giovannitti, Alexander;Rivnay, Jonathan
• 通讯作者: Rivnay, Jonathan

Diffraction imaging of nanocrystalline structures in organic semiconductor molecular thin films

• DOI: 10.1038/s41563-019-0387-3
• 发表时间: 2019-08-01
• 期刊: NATURE MATERIALS
• 影响因子: 41.2
• 作者: Panova, Ouliana;Ophus, Colin;Minor, Andrew M.
• 通讯作者: Minor, Andrew M.

Organic Transistors Incorporating Lipid Monolayers for Drug Interaction Studies

• DOI: 10.1002/admt.201900680
• 发表时间: 2019-10-18
• 期刊: ADVANCED MATERIALS TECHNOLOGIES
• 影响因子: 6.8
• 作者: Cavassin, Priscila;Pappa, Anna-Maria;Owens, Roisin M.
• 通讯作者: Owens, Roisin M.