CAREER: Metal-Semiconductor Hybrid Core-Shell Heteronanostructures with Geometrically Tunable Optical Properties

职业：具有几何可调光学特性的金属-半导体混合核壳异质纳米结构

• 批准号: 1253231
• 负责人: Hui Wang
• 金额: $ 61.5万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1253231&HistoricalAwards=false
• 关键词: CAREER; Metal; Semiconductor; Hybrid; Core

TECHNICAL SUMMARYThis CAREER award co-sponsored by the Solid State and Materials Chemistry (SSMC) and the Electronic and Photonic Materials (EPM) programs aims to develop quantitative understanding of the geometry-dependent optical characteristics of metal-semiconductor core-shell hybrid heteronanostructures both at the ensemble and single-nanoparticle levels. The proposed research will be carried out following a 3M (Make, Measure, Model) strategy that involves combined experimental and theoretical efforts. Robust wet chemistry approaches will be developed through which a whole set of important geometrical and compositional parameters of the metal-semiconductor core-shell nanoparticles can be precisely fine-controlled. The tight control over the particle geometries will allow one to systematically and selectively fine-tune the synergistic light absorption and scattering properties of the particles over a broad spectral range across the visible and near-infrared regions. Detailed, quantitative understanding of the correlation between particle geometry and optical properties will be developed through combined spectroscopy and electron microscopy measurements and further enhanced by theoretical calculations using Mie scattering theory and Finite Difference Time Domain (FDTD) simulations. Taking the advantage of the particles? geometrical and optical tunability, the PI's group will further explore new ways to utilize engineered hybrid nanoparticles for the optimization of molecular sensing and characterization platforms based on surface-enhanced Raman and fluorescence spectroscopies.NON-TECHNICAL SUMMARY Metal-semiconductor hybrid heteronanostructures have emerged as a new class of multifunctional sub-wavelength optical components with synergistically reinforced optical features, enhanced optical tunability, and even new optical characteristics that are otherwise inaccessible in any of the isolated components or their physical mixture counterparts. This CAREER grant aims to develop quantitative understanding of the relationship between the particle geometry and optical characteristics of metal-semiconductor hybrid heteronanostructures. The knowledge gained through the proposed research will greatly enhance our capabilities to selectively implement desired optical properties into hybrid nanoparticle-based materials and devices for widespread technological applications in materials and life sciences. With this award, the PI will be able to develop a highly interdisciplinary and collaborative nanoscience research and education program that involves broad participation of postdoctoral fellows, graduate, undergraduate, and high school students with diverse backgrounds. The postdocs and students in the PI's group will receive interdisciplinary and multidisciplinary training on cutting-edge research at the interface of physical chemistry and materials science. The PI will build undergraduate research partnerships and organize summer research workshops among University of South Carolina and Primarily Undergraduate Institutions to promote research and education on chemistry and materials science and help increase the enrollment and retention rate, especially those of female and academically underrepresented minorities, in the Science, Technology, Engineering and Mathematics (STEM) majors in the State of South Carolina. For course development, the PI will develop new lab modules to incorporate cutting-edge nanoscience research into the undergraduate and graduate courses. Outreach activities will be developed to educate teenagers from local middle schools and high schools about nanoscience and nanotechnology through scientific demos at annual South Carolina Science and Engineering Fair and summer research mentorships for high school students and teachers.

技术总结这个职业奖由固态和材料化学（SSMC）和电子和光子材料（EMPT）计划共同赞助，旨在发展对金属-半导体核-壳混合异质纳米结构的几何相关光学特性的定量理解，无论是在系综和单个纳米颗粒水平。拟议的研究将按照3 M（制造，测量，模型）策略进行，该策略涉及实验和理论相结合的努力。 将开发稳健的湿化学方法，通过该方法可以精确地精细控制金属-半导体核-壳纳米颗粒的一整套重要的几何和组成参数。对颗粒几何形状的严格控制将允许系统地和选择性地微调颗粒在可见光和近红外区域的宽光谱范围内的协同光吸收和散射特性。详细的，定量的了解粒子的几何形状和光学性质之间的相关性将通过结合光谱和电子显微镜测量，并进一步提高了理论计算使用米氏散射理论和时域有限差分（FDTD）模拟。利用粒子的优势？几何和光学可调谐性，PI的小组将进一步探索新的方法，利用工程混合纳米粒子优化分子传感和表征平台的基础上，表面增强拉曼和荧光光谱。非技术概述金属-半导体混合异质纳米结构已经出现作为一种新的类别的多功能亚波长光学元件，具有协同增强的光学特征，增强的光学可调谐性，以及甚至新的光学特性，这些光学特性在任何孤立的组分或它们的物理混合物对应物中是无法获得的。 这个CAREER补助金的目的是发展定量的理解粒子的几何形状和金属-半导体混合异质纳米结构的光学特性之间的关系。 通过拟议的研究获得的知识将大大提高我们的能力，有选择地实现所需的光学特性到混合纳米粒子为基础的材料和设备在材料和生命科学的广泛技术应用。 有了这个奖项，PI将能够开发一个高度跨学科和协作的纳米科学研究和教育计划，涉及博士后研究员，研究生，本科生和高中学生的广泛参与，具有不同的背景。 PI小组的博士后和学生将接受物理化学和材料科学界面前沿研究的跨学科和多学科培训。 PI将建立本科生研究伙伴关系，并在南卡罗来纳州大学和小学本科院校之间组织夏季研究研讨会，以促进化学和材料科学的研究和教育，并帮助提高入学率和留存率，特别是女性和学术代表性不足的少数民族，在南卡罗来纳州的科学，技术，工程和数学（STEM）专业。 对于课程开发，PI将开发新的实验室模块，将尖端的纳米科学研究纳入本科和研究生课程。 将开展外联活动，通过在一年一度的南卡罗来纳州科学和工程博览会上进行科学演示以及为高中学生和教师提供夏季研究指导，对当地初中和高中的青少年进行纳米科学和纳米技术教育。