Cation Exchange Pathways for Constructing Metal Chalcogenide Nanoparticle Libraries

用于构建金属硫族化物纳米粒子库的阳离子交换途径

• 批准号: 2210442
• 负责人: Raymond Schaak
• 金额: $ 67万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2210442&HistoricalAwards=false
• 关键词: Cation; Exchange; Pathways; Constructing; Metal

Non-Technical SummaryNew materials drive innovation in science and technology. Scientists are becoming better and better at predicting new materials, but it can often be challenging to make them. In this project, which is funded by the Solid State and Materials Chemistry program in the Division of Materials Research, Professor Ray Schaak and his group at Penn State University use simple chemical reactions to replace certain elements in a nanoparticle material with other elements. These reactions transform simple nanoparticles into nanoparticles that are much more complex. The researchers are studying how these reactions occur and how they can be used to make new types of nanoparticles that could help to advance applications in clean energy. This project is establishing new rules for how to control the arrangements of atoms and materials within a nanoparticle that contains various metals along with sulfur, selenium, tellurium, and/or oxygen. The PI and his group are applying these rules to many different materials so that they can make large collections of nanoparticles using the same methods. This knowledge will allow researchers to more quickly make and study new materials that are predicted but have remained out of reach. The PI and his group are partnering with a network of faculty and students at local colleges and are providing new educational resources for helping students to understand how atoms arrange in solid-state materials.Technical SummaryThere is a growing disconnect between the scope of materials that can be predicted, including computationally, and those that can be made experimentally. Many materials of interest, especially metastable phases and complex nanoparticles, have no known pathways for synthesizing them. This project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research, uses cation exchange reactions to modify the compositions of nanoparticles, producing large libraries of previously inaccessible nanoparticle materials through rational synthetic pathways. The PI and his group are establishing when and why existing synthetic guidelines break down and defining an expanded set of design rules that are broadly applicable across diverse metal chalcogenide and oxychalcogenide systems, including semiconductors having tunable band gaps. The researchers are studying how interfaces in heterostructured nanoparticles form and evolve and how layered intergrowth and superlattice compounds can be targeted through partial and complete cation exchange reactions that are chemo- and regio-selective. They are developing rational pathways to heterostructured nanoparticle megalibraries having millions of possible members, as well as new chemical reactions that break symmetry and introduce new structural motifs. This project is helping to bridge the gap between materials that can be predicted and those that can be synthesized, which will help to accelerate rational materials development. The PI and his group are partnering with a network of faculty and students at local colleges and are developing resources for visualizing crystal structures and their interrelationships, which allow students to analyze materials and understand their reactivity.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.

非技术概要新材料推动科技创新。科学家们越来越擅长预测新材料，但制造它们往往具有挑战性。在这个由材料研究部固态和材料化学项目资助的项目中，宾夕法尼亚州立大学的 Ray Schaak 教授和他的团队使用简单的化学反应，用其他元素取代纳米颗粒材料中的某些元素。这些反应将简单的纳米颗粒转化为更复杂的纳米颗粒。研究人员正在研究这些反应是如何发生的，以及如何利用它们来制造新型纳米颗粒，从而有助于推进清洁能源的应用。该项目正在制定新规则，指导如何控制纳米颗粒内原子和材料的排列，纳米颗粒含有各种金属以及硫、硒、碲和/或氧。 PI 和他的团队正在将这些规则应用于许多不同的材料，以便他们可以使用相同的方法制造大量纳米颗粒。这些知识将使研究人员能够更快地制造和研究那些被预测但仍然遥不可及的新材料。 PI 和他的团队正在与当地大学的教职员工和学生网络合作，提供新的教育资源，帮助学生了解原子在固态材料中的排列方式。 技术概要可以预测的，包括通过计算预测的，以及可以通过实验预测的。许多感兴趣的材料，特别是亚稳相和复杂的纳米颗粒，没有已知的合成途径。该项目由材料研究部的固态和材料化学项目支持，利用阳离子交换反应来改变纳米颗粒的成分，通过合理的合成途径产生以前无法获得的纳米颗粒材料的大型库。 PI 和他的团队正在确定现有合成指南失效的时间和原因，并定义一套扩展的设计规则，这些规则广泛适用于各种金属硫属化物和氧硫属化物系统，包括具有可调带隙的半导体。研究人员正在研究异质结构纳米颗粒中的界面如何形成和演化，以及如何通过化学和区域选择性的部分和完全阳离子交换反应来靶向层状共生和超晶格化合物。他们正在开发具有数百万可能成员的异质结构纳米粒子巨型库的合理途径，以及打破对称性并引入新结构基序的新化学反应。该项目正在帮助弥合可预测材料和可合成材料之间的差距，这将有助于加速合理材料的开发。该 PI 和他的团队正在与当地大学的教职员工和学生网络合作，正在开发可视化晶体结构及其相互关系的资源，使学生能够分析材料并了解其反应性。该奖项反映了 NSF 的法定使命，并被视为值得通过使用基金会的智力优点和更广泛的影响审查标准进行评估来支持。

项目成果

Postsynthetic Thiol-Induced Reshaping of Copper Sulfide Nanoparticles

• DOI: 10.1021/acs.chemmater.2c03049
• 发表时间: 2022-12
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Haley L. Young;Connor R. McCormick;Auston G. Butterfield;Enrique D. Gomez;R. Schaak

Combinatorial cation exchange for the discovery and rational synthesis of heterostructured nanorods

用于发现和合理合成异质结构纳米棒的组合阳离子交换

• DOI: 10.1038/s44160-022-00203-4
• 发表时间: 2023
• 期刊: Nature Synthesis
• 作者: McCormick, Connor R.;Katzbaer, Rowan R.;Steimle, Benjamin C.;Schaak, Raymond E.
• 通讯作者: Schaak, Raymond E.