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Advanced Optical Characterization and Imaging of Single-Walled Carbon Nanotubes

单壁碳纳米管的先进光学表征和成像

基本信息

批准号：
1409698
负责人：
Robert Weisman
金额：
$ 50万
依托单位：
William Marsh Rice University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-08-15 至 2018-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1409698&HistoricalAwards=false
关键词：
Advanced Optical Characterization Imaging Single

项目摘要

In this project funded by the Chemical Measurement and Imaging Program of the Division of Chemistry, Professor R. Bruce Weisman of Rice University is developing new ways to characterize and purify a scientifically and technologically important class of nanomaterials: single-walled carbon nanotubes (SWCNTs). These nanotubes display many remarkable properties that make them of great current interest to researchers pursuing basic science as well as real-world applications. However, progress in this field is often limited by difficulties in finding the amounts of specific nanotube structures that are present in samples, assessing the nanotube quality, detecting them in trace quantities in biological and environmental specimens, and sorting nanotube mixtures into pure structural forms. This project addresses these challenges using novel experimental methods. This research will provide broader impacts through the participation and professional development of underrepresented minority and women science students. In addition, the experimental methods and findings of the project should speed the development of new and economically valuable commercial technologies based on carbon nanotubes.The project will explore and develop variance spectroscopy, a new optical technique that serves as a bridge between bulk and single-particle regimes and can reveal nanoparticle concentrations, emission efficiencies, inhomogeneities, and aggregation. A recently developed method will be used to directly measure the absolute, structure-specific absorption cross-sections needed to quantify the compositions of single-walled carbon nanotube (SWCNT) samples. Improved analysis methods will support efforts to more effectively sort SWCNTs by length. The project will also focus on enhancing the sensitivity limits for detecting and imaging SWCNTs present in complex samples at trace concentrations.

在这个由化学系化学测量和成像项目资助的项目中，莱斯大学的R. Bruce Weisman教授正在开发新的方法来表征和纯化科学和技术上重要的一类纳米材料：单壁碳纳米管（SWCNTs）。这些纳米管显示出许多非凡的特性，使其成为追求基础科学和现实应用的研究人员的极大兴趣。然而，这一领域的进展常常受到以下困难的限制：寻找样品中存在的特定纳米管结构的数量，评估纳米管质量，检测生物和环境样品中痕量的纳米管，以及将纳米管混合物分类为纯结构形式。本项目采用新颖的实验方法来解决这些挑战。这项研究将通过代表性不足的少数民族和女性理科生的参与和专业发展产生更广泛的影响。此外，这个项目的实验方法和发现应该加速基于碳纳米管的新的和经济上有价值的商业技术的发展。该项目将探索和发展方差光谱学，这是一种新的光学技术，可以作为体粒子和单粒子之间的桥梁，可以揭示纳米粒子的浓度、发射效率、不均匀性和聚集性。最近开发的一种方法将用于直接测量定量单壁碳纳米管（SWCNT）样品组成所需的绝对、结构特异性吸收截面。改进的分析方法将支持更有效地按长度对SWCNTs进行分类。该项目还将侧重于提高检测和成像存在于痕量浓度复杂样品中的SWCNTs的灵敏度限制。