EAGER: Silicon Graphane Analogues

EAGER：硅石墨烷类似物

• 批准号: 1201953
• 负责人: Joshua Goldberger
• 金额: $ 10万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-01 至 2013-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1201953&HistoricalAwards=false
• 关键词: EAGER; Silicon; Graphane; Analogues

TECHNICAL ABSTRACT:The primary goals of this research supported by the Solid State and Materials Chemistry program are to develop the synthetic methodology for creating organic-passivated single atom thick sheets of silicon, evaluate their stability in air and water environments, and study their optical and electronic properties both in the bulk and as single isolated sheets. These organic-terminated silicon sheets will be synthesized by combining nonaqueous deintercalation of layered Zintl silicon phases with surface functionalization processes. A combination of X-ray diffraction, Raman, FTIR, XPS, AFM, SEM, and TEM measurements will be employed to characterize the structure and morphology as well as evaluate the long-term air and water stability of these materials. The optical and electronic properties of these layered silicon graphane analogues will be characterized using absorption, fluorescence, and electronic measurements on bulk pellets and single isolated sheets. These single atom thick silicon graphane analogues are expected to be air- and water-stable, and possess numerous advantages compared to bulk silicon and other two-dimensional layers, including having a direct and tunable band gap, as well as the capability for covalent functionalization with minimal disruption to conductivity, thus potentially making them a versatile building block for a multitude of applications.NON-TECHNICAL ABSTRACT: The discovery of allotropes of carbon that are zero-dimensional (fullerene), one-dimensional (nanotubes), and two-dimensional (graphene), has opened up entire fields of research and ultimately culminated in two Nobel prizes. Still, silicon remains the most ubiquitous and technologically significant material of our time. This research program focuses on understanding how to synthesize single atom thick sheets of silicon that are protected with organic molecules for air- and water- stability, and evaluationg their optical and electronic properties. Considering the promise and application of silicon in computing, photovoltaics, thermoelectrics, battery electrodes, spintronics, and chemical/ biochemical sensing, the creation of new air- and water-stable allotropes of silicon with fundamentally unique properties can hold great potential in numerous technologies, including renewable energy technologies. This program will be integrated with educational and outreach activities at Ohio State which target high school students, undergraduates, and the general public. The PI is actively involved in mentoring underrepresented groups at both the undergraduate, and graduate levels, encouraging their development as the next generation of materials innovators. Finally, this program will support community outreach activities designed to foster interest in materials- and energy-related science, technology, and engineering at the K-12 level, via collaborative programs with the Center of Science and Industry (COSI) museum, and the state Science Olympiad program.

技术摘要：本研究由固态和材料化学项目支持，主要目标是开发有机钝化单原子厚硅片的合成方法，评估其在空气和水环境中的稳定性，并研究其整体和单个隔离片的光学和电子特性。这些有机终止硅片将通过层状锌硅相的非水脱嵌和表面功能化工艺相结合来合成。结合x射线衍射、拉曼、FTIR、XPS、AFM、SEM和TEM测量将被用来表征这些材料的结构和形态，以及评估这些材料的长期空气和水稳定性。这些层状硅石墨烯类似物的光学和电子特性将使用吸收、荧光和电子测量来表征大块颗粒和单个隔离片。这些单原子厚硅石墨烯类似物预计具有空气和水稳定性，并且与大块硅和其他二维层相比具有许多优点，包括具有直接可调的带隙，以及共价功能化的能力，同时对电导率的破坏最小，因此有可能使它们成为多种应用的通用构建块。摘要：碳的零维（富勒烯）、一维（纳米管）和二维（石墨烯）同素异形体的发现，开辟了整个研究领域，并最终获得了两项诺贝尔奖。尽管如此，硅仍然是我们这个时代最普遍、最具技术意义的材料。本研究计划的重点是了解如何合成用有机分子保护的单原子厚硅片，以保持空气和水的稳定性，并评估其光学和电子特性。考虑到硅在计算、光伏、热电、电池电极、自旋电子学和化学/生物化学传感方面的前景和应用，具有基本独特性质的新型硅的空气和水稳定同素异形体的创造在许多技术中都具有巨大的潜力，包括可再生能源技术。该项目将与俄亥俄州立大学针对高中生、本科生和普通公众的教育和推广活动相结合。PI积极参与指导本科生和研究生水平的代表性不足的群体，鼓励他们发展为下一代材料创新者。最后，该项目将通过与科学与工业中心（COSI）博物馆和国家科学奥林匹克项目的合作项目，支持旨在培养K-12年级学生对材料和能源相关科学、技术和工程兴趣的社区外展活动。