CAREER: Local Charge, Polarization, and Transport of Nanocrystal Quantum Dot Solid State Structures using Scanning Probe Microscopy

职业：使用扫描探针显微镜研究纳米晶体量子点固态结构的局部电荷、极化和输运

• 批准号: 0955348
• 负责人: Katherine Aidala
• 金额: $ 40万
• 依托单位: Mount Holyoke College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0955348&HistoricalAwards=false
• 关键词: CAREER; Local; Charge; Polarization; Transport

****NON-TECHNICAL ABSTRACT****Semiconducting nanocrystal quantum dots (NQDs) are tiny ?balls? of material with exciting optical and electronic properties that can be controlled by changing the size of the NQD and other parameters. They are relatively easy to incorporate into devices, and have already proven their utility as fluorescent markers for biological imaging. NQDs are being used in photovoltaics, energy efficient lighting, and photodetectors, though the electronic properties of NQDs are sensitive to their immediate surroundings. This Faculty Early Career Award supports a project seeking to understand electronic properties of nanocrystal quantum dots (NQDs) in environments relevant to functional optoelectronic devices. This will be done by using a scanning probe microscope that can investigate individual NQDs, measuring the charge, current, and location of the NQDs in a variety of environments, leading to improved device design. Furthermore, this project aims to increase general science literacy and motivate the female undergraduate students at Mount Holyoke College to pursue careers in science, by engaging undergraduates in hands-on research projects and developing a first year seminar. The seminar seeks to excite the students about present-day research and to educate both science majors and interested non-majors about how science ?happens? by reading and discussing recent popular coverage of scientific discoveries and debates. ****TECHNICAL ABSTRACT****This Faculty Early Career Award supports a project seeking to understand electronic properties of nanocrystal quantum dots (NQDs) in solid state structures, in particular an understanding of charge transport on and off NQDs. The research project will focus on the use of scanning probe microscopy (SPM) to locally probe NQD arrays, as well as isolated and aggregated NQDs deposited on a variety of materials and embedded in organic semiconductors. Scanned gate techniques, electric force microscopy, and conductive SPM can spatially reveal variations in electrical properties of nominally identical areas, illuminating the role of the local environment and imperfections of fabrication on microscopic and macroscopic properties. Furthermore, this project aims to increase general science literacy and motivate the female students at Mount Holyoke College to pursue careers in science, by engaging undergraduates in hands-on research projects and developing a first year seminar. The seminar seeks to excite the students about present-day research and to educate both science majors and interested non-majors about how science ?happens? by reading and discussing recent popular coverage of scientific discoveries and debates.

****非技术摘要****半导体纳米晶体量子点（NQD）是微小的“球”？具有令人兴奋的光学和电子特性的材料，可以通过改变 NQD 的尺寸和其他参数来控制。它们相对容易集成到设备中，并且已经证明了它们作为生物成像荧光标记物的实用性。 尽管 NQD 的电子特性对其周围环境很敏感，但 NQD 正用于光伏、节能照明和光电探测器。该学院早期职业奖支持一个项目，旨在了解与功能光电设备相关的环境中纳米晶体量子点（NQD）的电子特性。 这将通过使用扫描探针显微镜来完成，该显微镜可以研究单个 NQD，测量各种环境中 NQD 的电荷、电流和位置，从而改进设备设计。此外，该项目旨在通过让本科生参与实践研究项目和举办第一年研讨会，提高普通科学素养，并激励曼荷莲学院的女本科生从事科学事业。 该研讨会旨在激发学生对当今研究的兴趣，并教育科学专业和感兴趣的非专业人士了解科学是如何发生的。通过阅读和讨论最近流行的科学发现和辩论报道。 ****技术摘要****该教师早期职业奖支持一个项目，旨在了解固态结构中纳米晶体量子点 (NQD) 的电子特性，特别是了解 NQD 内外的电荷传输。 该研究项目将重点关注使用扫描探针显微镜 (SPM) 局部探测 NQD 阵列，以及沉积在各种材料上并嵌入有机半导体中的分离和聚集的 NQD。 扫描栅极技术、电力显微镜和导电 SPM 可以在空间上揭示名义上相同区域的电特性变化，阐明局部环境的作用以及制造缺陷对微观和宏观特性的影响。 此外，该项目旨在通过让本科生参与实践研究项目和举办第一年研讨会，提高普通科学素养，并激励曼荷莲学院的女学生从事科学事业。 该研讨会旨在激发学生对当今研究的兴趣，并教育科学专业和感兴趣的非专业人士了解科学是如何发生的。通过阅读和讨论最近流行的科学发现和辩论报道。