Redox Properties of Reduced Semiconductor Nanocrystals

还原半导体纳米晶体的氧化还原性质

• 批准号: 1506014
• 负责人: Daniel Gamelin
• 金额: $ 52万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506014&HistoricalAwards=false
• 关键词: Redox; Properties; Reduced; Semiconductor; Nanocrystals

The Macromolecular, Supramolecular and Nanochemistry Program supports the efforts of Professor Daniel Gamelin of the University of Washington to study the redox properties of reduced semiconductor nanocrystals. The interconversion of chemical, electrical, and optical energies is critical to many advanced technologies. Nanoscale semiconductors play central roles in many of these technologies. This research is addressing fundamental aspects of the redox and photoredox properties of colloidal semiconductor nanocrystals, focusing on interconversion of the various forms of energy and yielding new materials and new fundamental knowledge relevant to a wide variety of catalytic, opto-electronic, and energy-conversion technologies. Characterization of reduced-nanocrystal physical properties, electronic structures, and redox properties is building important bridges connecting fields of semiconductor nanoscience, photochemistry, electrochemistry, spectroscopy, and energy and information sciences. This project is also providing participants with advanced interdisciplinary education and training, and preparing them for careers in science, engineering, and education. Integration of research and education is being emphasized through involvement of undergraduate students in the research, incorporation of experiments and research concepts from this project into the University of Washington undergraduate curriculum, close collaboration with faculty from undergraduate institutions, and outreach activities at regional community colleges, high schools, and community events.This project aims to explore the redox properties of colloidal semiconductor nanocrystals including ZnO, In2O3, CdSe, CdS, CdTe and PbS, and related compositions, focusing on the development and understanding of solution-phase reduced nanocrystals containing excess delocalized conduction-band electrons. A combination of advanced syntheses, sophisticated spectroscopies, and analytical methods is being applied to develop reduced colloidal semiconductor nanocrystals and to understand their electronic structures and redox characteristics. This research emphasizes the development of new materials, new quantitative methodologies, and new redox chemistries. The integration of synthesis, spectroscopy, reactivity studies, electronic-structure studies, and quantitative analysis is facilitating the discovery and development of advanced materials, and elucidating fundamental structure/function relationships in these unusual materials. This project is providing advanced interdisciplinary education and training for participants in the areas of inorganic, physical, and materials chemistries, preparing them for careers in science, engineering, technology innovation, and education. These activities have a broader impact through integration of research and education, particularly at the undergraduate level, and through outreach activities involving regional community colleges, high schools, and the general community.

大分子、超分子和纳米化学项目支持华盛顿大学Daniel Gamelin教授对还原半导体纳米晶体氧化还原特性的研究。化学能、电能和光能的相互转换对许多先进技术至关重要。纳米级半导体在许多这些技术中发挥着核心作用。本研究旨在解决胶体半导体纳米晶体氧化还原和光氧化还原特性的基本问题，重点关注各种形式能量的相互转换，并产生与各种催化、光电和能量转换技术相关的新材料和新基础知识。还原纳米晶体物理性质、电子结构和氧化还原性质的表征是连接半导体纳米科学、光化学、电化学、光谱学、能源与信息科学等领域的重要桥梁。该项目还为参与者提供先进的跨学科教育和培训，为他们在科学、工程和教育领域的职业生涯做好准备。通过让本科生参与研究，将实验和研究概念纳入华盛顿大学的本科课程，与本科院校的教师密切合作，以及在地区社区学院、高中和社区活动中开展外展活动，强调研究和教育的整合。本项目旨在探索包括ZnO、In2O3、CdSe、CdS、CdTe和PbS在内的胶体半导体纳米晶体及其相关成分的氧化还原特性，重点是开发和理解含有过量离域导带电子的液相还原纳米晶体。先进的合成、复杂的光谱和分析方法的结合正在应用于开发还原胶体半导体纳米晶体，并了解它们的电子结构和氧化还原特性。本研究强调新材料、新定量方法和新氧化还原化学的发展。合成、光谱学、反应性研究、电子结构研究和定量分析的整合促进了先进材料的发现和发展，并阐明了这些不寻常材料的基本结构/功能关系。该项目为无机、物理和材料化学领域的参与者提供先进的跨学科教育和培训，为他们在科学、工程、技术创新和教育领域的职业生涯做好准备。这些活动通过整合研究和教育，特别是在本科一级，以及通过涉及区域社区学院、高中和一般社区的外展活动，产生更广泛的影响。