CAREER: Saturated and Unsaturated Silicon for Single-Molecule Electronics

职业：用于单分子电子产品的饱和和不饱和硅

• 批准号: 2340979
• 负责人: Timothy Su
• 金额: $ 77万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-06-01 至 2029-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2340979&HistoricalAwards=false
• 关键词: CAREER; Saturated; Unsaturated; Silicon; Single

With support from the Chemical Structure, Dynamics & Mechanisms B Program of the Chemistry Division, Timothy Su of the Department of Chemistry at the University of California, Riverside (UCR) is developing silicon-based electronics at the smallest length scales (i.e., molecules). Silicon is the hallmark material of modern microelectronics and emerging quantum electronic technologies. With silicon electronics becoming increasingly miniaturized, it is ever important to understand how the structure of silicon at molecular length scales can be designed and controlled to give tailored electronic properties. The central hypothesis is that by controlling the structure of the molecular backbone, silicon-based molecular circuits can be made to be highly resistive, highly conducting, or electronically switchable to extents that outperform current molecular electronic technologies. The educational activities focus on attracting and retaining disadvantaged and underrepresented students in the STEM (science, technology, engineering and mathematics) pipeline from the elementary school level to the university level. Toward this goal, student-created social media videos will be leveraged to: (1) improve learning outcomes and close the achievement gap for UCR students at the entry point of their STEM coursework, (2) create a cyberinfrastructure to demystify chemical concepts and STEM careers, (3) engage local 5th and 6th grade students in science through silicon materials experiments, and (4) broaden participation in chemical research. These activities heavily target the needs of students at UC Riverside, a designated Hispanic Serving Institution (HSI), where over fifty percent of students are Pell Grant recipients and the first in their families to attend a 4-year college.This proposal describes the synthesis, functionalization, and integration of conjugated molecular silicon into single-molecule circuits studied with a scanning tunneling microscopy break-junction (STM-BJ) approach. It will: (1) explore the impact of Ge-atom incorporation and cluster dimerization on destructive quantum interference (DQI) in bicyclic oligosilane insulators, (2) use mechanical stimuli to promote or disrupt weak intramolecular bonding interactions within the polysilane backbone to access reversible conductance switches, and (3) probe unsaturated silicon molecules as an unexplored class of nanoelectronic materials anticipated to be several orders of magnitude more conductive than their organic analogs. These efforts are aimed at establishing the foundation of the principal investigator’s program to explore an emerging area of work termed main group molecular electronics.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.

在化学结构，动力学和机制B计划的支持下，加利福尼亚大学河滨大学化学系的Timothy SU，Riverside（UCR）正在以最小的长度尺度（即分子）开发基于硅的电子设备。硅是现代微电子和新兴量子电子技术的标志材料。随着硅电子的越来越小的微型化，了解如何在分子长度尺度上设计和控制硅的结构如何具有定制的电子特性，这一点至关重要。中心假设是，通过控制分子主链的结构，可以使基于硅的分子电路具有高度抗性，高度传导或以电子方式切换到超出电流分子电子技术的范围。这些教育活动着重于吸引和保留在STEM（科学，技术，工程和数学）管道中从小学到大学级别到大学级别的弱势和人数不足的学生。为了实现这一目标，由学生创建的社交媒体视频将被利用为：（1）改善学习成果并在其STEM课程的入口处缩小UCR学生的成就差距，（2）创建一个网络基础结构，以使化学概念和STEM职业脱颖而出，（3）通过Silicon Interials和4年级的参与者，（3）使其在Science Consection和6年级的参与者中，（3）实验，（4）。 These activities heavily target the needs of students at UC Riverside, a designated Hispanic Serving Institution (HSI), where over fifty percent of students are Pell Grant recipients and the first in their families to attend a 4-year college.This proposal describes the synthesis, functionalization, and integration of connected molecular silicon into single-molecule circuits studiod with a scanning tunneling microscopy break-junction （STM-BJ）方法。它将：（1）探索生物寡硅烷绝缘子中掺入和聚类二聚化对破坏性量子干扰（DQI）的影响，（2）使用机械刺激来促进或破坏弱分子内粘结相互作用或破坏多性分离型骨架内部反向电导不良电导液中的均匀分类和（3）孔的均匀分类的（3）孔子的（3）纳米电源材料预计将比其有机类似物更有导电。这些努力旨在建立首席研究者计划的基础，以探索称为主要小组分子电子产品的新兴领域。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛影响的审查标准通过评估来获得的支持。