NSF-BSF: The Hard-Soft Interface -- Integrating 2D Semiconductors with Functional Polymers for Nanoscale Optoelectronics

NSF-BSF：硬-软接口——将二维半导体与功能聚合物集成以实现纳米级光电子学

• 批准号: 1808011
• 负责人: Ashwin Ramasubramaniam
• 金额: $ 45万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808011&HistoricalAwards=false
• 关键词: NSF; BSF; Hard; Soft; Interface

Nontechnical description: Two-dimensional (2D) materials are a class of crystalline materials composed of extremely thin sheets (one or a few atoms in thickness) with the potential to create smaller and faster electronic and optical devices. However, since existing methods for preparing such devices are not suitable for 2D materials, new approaches must be discovered that promote their easy integration into device constructs. This project studies 2D materials that are coated with polymers, which can be applied with extreme precision to manipulate the physical and electronic properties at specific locations. This promotes inexpensive, large-scale fabrication of electronic and optical devices within single sheets of 2D materials, enabling applications in low-power, nanoscale electronic and optical devices, including wearable and conformable devices. This project includes summer research opportunities for middle and high school students as well as recruitment and mentoring of underrepresented minority students at UMass Amherst, and outreach to the community in Western Massachusetts. US-Israel scientific collaborations are enhanced by graduate students exchanges between partner institutions.Technical Description: A major challenge in harnessing 2D materials for optoelectronic devices arises from limited avenues for exercising precise control over charge carrier concentrations (doping). This project focuses on Mo and W transition-metal dichalcogenides (TMDCs) with the goal of modulating their optoelectronic properties through novel interfacial chemistries that are more straightforward and robust to implement than direct substitutional doping of the TMDC itself. An integrated theory-synthesis-characterization approach facilitates rational design and application of organochalcogen- and dipole-rich functional polymers for precise, spatially-targeted control over carrier doping, work functions, and band gaps of TMDCs. This hard-soft, 2D materials platform, enables the preparation of optoelectronic devices such as photodiodes, transistors, and inverters - key building blocks of digital electronics - fabricated within 2D monolayers using methods that are scalable and compatible with existing semiconductor technology. Fundamental advances in the development of polymer-TMDC semiconductors project far-reaching impact on optoelectronic devices, enabling technologies in computing, data storage, and consumer electronics. The research program is integrated with formative summer research opportunities for undergraduates from minority-serving institutions, as well as local middle- and high-school students, thereby nurturing the next generation of materials scientists and engineers. Researchers also deliver informal lectures to the broader public in Western Massachusetts to kindle interest in the emerging field of 2D materials. US-Israel scientific collaborations are enhanced by graduate students exchanges between partner institutions.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.

非技术描述：二维（2D）材料是一类结晶材料，由极薄的床单（一个或几个厚度的一个或几个原子）组成，可能会产生较小，更快的电子和光学设备。但是，由于准备此类设备的现有方法不适合2D材料，因此必须发现新的方法将其易于集成到设备构造中。该项目研究了涂有聚合物的2D材料，这些材料可以以极高的精度应用以操纵特定位置的物理和电子特性。这促进了在2D材料的单张纸内廉价，大规模制造的电子和光学设备，可在低功率，纳米级电子和光学设备（包括可穿戴和符合符合设备）中应用。该项目包括中学生和高中生的夏季研究机会，以及在UMass Amherst招募和指导代表性不足的少数族裔学生，以及向马萨诸塞州西部的社区推广。伙伴机构之间的研究生交流增强了美国 - 以色列的科学合作。技术描述：利用2D材料用于光电设备的主要挑战源于有限的途径，该途径是对对电荷载体浓度（掺杂）进行精确控制的途径。该项目侧重于MO和W过渡金属二色元（TMDC），其目的是通过新型的界面化学分配来调节其光电特性，而与TMDC本身的直接替代掺杂相比，它们更简单，更强大。综合理论合成特征方法促进了有机原料和富含偶极子的功能聚合物的合理设计和应用，以精确，空间靶向载体掺杂，工作功能以及TMDC的带隙。这个硬柔软的2D材料平台可以制备光电设备，例如光电二极管，晶体管和逆变器 - 数字电子设备的关键构件 - 在2D单层中使用可扩展并与现有半导体技术兼容的方法在2D单层中制造。聚合物-TMDC半导体项目开发的基本进步项目对光电设备的影响深远影响，从而使计算，数据存储和消费电子产品的技术能够实现。该研究计划与少数派服务机构以及当地中学和高中生的本科生的形成性夏季研究机会融合在一起，从而培养了下一代材料科学家和工程师。研究人员还向马萨诸塞州西部的更广泛的公众提供非正式的讲座，以对2D材料的新兴领域进行兴趣。伙伴机构之间的研究生交流增强了美国 - 以色列的科学合作。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的评估标准通过评估来支持的。

项目成果

Bidirectional Electronic Tuning of Single-Layer MoS2 with Conjugated Organochalcogens

• DOI: 10.1021/acs.jpcc.8b10826
• 发表时间: 2019-01
• 期刊: The Journal of Physical Chemistry C
• 作者: Peijian Wang;Ryan C. Selhorst;T. Emrick;A. Ramasubramaniam;M. Barnes

Polarization-Driven Asymmetric Electronic Response of Monolayer Graphene to Polymer Zwitterions Probed from Both Sides

单层石墨烯对聚合物两性离子的偏振驱动不对称电子响应从两侧探测

• DOI: 10.1021/acsami.1c13505
• 发表时间: 2021
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Hight-Huf, Nicholas;Nagar, Yehiel;Levi, Adi;Pagaduan, James Nicolas;Datar, Avdhoot;Katsumata, Reika;Emrick, Todd;Ramasubramaniam, Ashwin;Naveh, Doron;Barnes, Michael D.
• 通讯作者: Barnes, Michael D.