A General and Robust Route to Highly Diverse Hollow Nanostructures with New Properties

具有新特性的高度多样化空心纳米结构的通用且稳健的途径

• 批准号: 2004546
• 负责人: Xiaohu Xia
• 金额: $ 47.5万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2004546&HistoricalAwards=false
• 关键词: General; Robust; Route; Highly; Diverse

Non-Technical Summary Nanoscale materials with hollow interiors (i.e., hollow nanomaterials) are critical components in many areas of science and technology. The properties of hollow nanomaterials and their usefulness in applications such as biosensing and catalysis have strong dependence on their detailed structure such as shape and elemental composition and can be different than those of solid particles of the same size. Nevertheless, it has been a challenge to finely control the structure of a hollow nanomaterial in chemical synthesis. The goal of this project, which is jointly supported by the Solid State and Materials Chemistry program and the Metals and Metallic Nanostructures program, both in the Division of Materials Research, is to establish a general and effective method to synthesize hollow nanomaterials with controllable structures and new properties. In addition to synthesizing new materials, this project examines properties such as thermal stability and unusual interactions with light that will be important for eventual applications. This project provides multidisciplinary research training for graduate and undergraduate students particularly from underrepresented groups. Through a new NanoAmbassadors program, undergraduate students will be involved in outreach on nanomaterials at their former high schools. The project also provides high school students with summer research opportunities.Technical SummaryHollow nanomaterials have found widespread uses in many areas, including biomedicine, imaging, sensing, catalysis and electronics. Controlling the structure of hollow nanostructures is an effective approach to tailoring their physicochemical properties. The proposed work, which is jointly supported by the Solid State and Materials Chemistry program and the Metals and Metallic Nanostructures program, both in the Division of Materials Research, seeks to develop a general and robust method to precisely control the structure of hollow nanomaterials. This method relies on alternating processes of galvanic replacement reactions and sacrificial template regeneration. As examples, design and synthesis of hollow nanostructures made of gold, silver, platinum, palladium, copper, and materials containing multiple metals are being demonstrated. A series of hollow nanostructures with diverse structures and new properties are being generated. Detailed structures of the hollow nanomaterials and their structural responses to heating are revealed with high-performance electron microscopy. Plasmonic properties of the nanomaterials are investigated using both experimental measurements and computational simulations. This project will benefit the engagement of graduate and undergraduate students, especially those from underrepresented groups, in research. The research is also integrated into outreach activities for K-12 students. Through a new NanoAmbassadors program, undergraduate students will be involved in outreach on nanomaterials at their former high schools. The project also provides high school students with summer research opportunities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

具有中空内部的纳米级材料（即，中空纳米材料）是许多科学和技术领域的关键组成部分。中空纳米材料的性质及其在生物传感和催化等应用中的有用性强烈依赖于其详细结构，如形状和元素组成，并且可能不同于相同尺寸的固体颗粒。然而，在化学合成中精细控制中空纳米材料的结构一直是一个挑战。该项目由材料研究部的固态和材料化学计划以及金属和金属纳米结构计划共同支持，其目标是建立一种通用有效的方法来合成具有可控结构和新性能的中空纳米材料。 除了合成新材料外，该项目还研究了热稳定性和与光的异常相互作用等特性，这些特性对于最终的应用至关重要。 该项目为研究生和本科生提供多学科研究培训，特别是来自代表性不足群体的学生。通过一个新的纳米大使计划，本科生将在他们以前的高中参与纳米材料的推广。 该项目还为高中生提供暑期研究机会。技术概述中空纳米材料在生物医学、成像、传感、催化和电子等许多领域都有广泛的用途。控制中空纳米结构的结构是定制其物理化学性质的有效方法。拟议的工作由材料研究部的固态和材料化学计划以及金属和金属纳米结构计划共同支持，旨在开发一种通用而强大的方法来精确控制中空纳米材料的结构。该方法依赖于电化学置换反应和牺牲模板再生的交替过程。例如，由金、银、铂、钯、铜和含有多种金属的材料制成的中空纳米结构的设计和合成正在被展示。一系列具有不同结构和新性能的中空纳米结构正在产生。用高性能电子显微镜揭示了中空纳米材料的详细结构及其对加热的结构响应。使用实验测量和计算模拟来研究纳米材料的等离子体性质。该项目将有利于研究生和本科生的参与，特别是那些来自代表性不足的群体，在研究。这项研究也被纳入K-12学生的外联活动。 通过一个新的纳米大使计划，本科生将在他们以前的高中参与纳米材料的推广。 该项目还为高中生提供暑期研究机会。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Morphology-Invariant Metallic Nanoparticles with Tunable Plasmonic Properties

• DOI: 10.1021/acsnano.0c06123
• 发表时间: 2021-01-29
• 期刊: ACS NANO
• 影响因子: 17.1
• 作者: Gao, Zhuangqiang;Shao, Shikuan;Xia, Xiaohu
• 通讯作者: Xia, Xiaohu

Effects of Cascading Optical Processes: Part II: Impacts on Experimental Quantification of Sample Absorption and Scattering Properties

• DOI: 10.1021/acs.analchem.2c05055
• 发表时间: 2023-02-14
• 期刊: ANALYTICAL CHEMISTRY
• 影响因子: 7.4
• 作者: Wathudura，Pathum;Wamsley，Max;Zhang，Dongmao
• 通讯作者: Zhang，Dongmao

Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

• DOI: 10.1021/acs.jpcc.0c10402
• 发表时间: 2021-01
• 期刊: Journal of Physical Chemistry C
• 影响因子: 3.7
• 作者: Yadong Zhou;Gang Chen;Shengli Zou

Understanding the Impact of Wall Thickness on Thermal Stability of Silver–Gold Nanocages

• DOI: 10.1021/acs.jpcc.2c01433
• 发表时间: 2022-04
• 期刊: The Journal of Physical Chemistry C
• 作者: Shikuan Shao;Xiangyu Zhu;V. Ten;Moon J. Kim;Xiaohu Xia