CAREER: CAS: Chemical Pathways for the Synthesis of Dilute Metal Alloy and Multimetallic Complex Solid Solution Nanocrystals

职业：CAS：稀金属合金和多金属络合物固溶体纳米晶体合成的化学途径

• 批准号: 2239441
• 负责人: Xingchen Ye
• 金额: $ 70万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-02-01 至 2028-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2239441&HistoricalAwards=false
• 关键词: CAREER; CAS; Chemical; Pathways; Synthesis

With the support of the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry, Dr. Xingchen Ye of Indiana University Bloomington will develop new ways of making nanoscale metal alloys. In addition to potentially exhibiting unique chemical and physical properties, these nanoparticles contain earth-abundant, non-precious elements making them less expensive and more sustainable than the commonly used noble metal nanoparticles. These nanoparticles have the potential to enable new technologies in clean energy, photonics, pharmaceutical industry applications and more. The broader impacts of this project include educational and outreach initiatives that aim to increase interest in science among K-12 students and to improve undergraduate students’ readiness for graduate study in STEM fields. Specifically, Dr. Ye will develop a classroom teaching module called “Colloids-Microscopy-Data” to expose high school students to modern aspects of colloidal chemistry and microscopy imaging. In addition, an 8-week summer program will be created to engage undergraduate students, particularly those from underrepresented groups, in materials chemistry research. The Ye research group aims to establish chemical pathways for the synthesis of dilute metal alloy and complex multimetallic nanocrystals with well-defined shape and composition. In Aim 1, a library of dilute metal alloy nanocrystals will be synthesized and characterized, with the emphasis on non-precious yet chemically more challenging base metal systems. The catalytic and plasmonic properties of these nanocrystals will be evaluated to understand structure-property relationships. In Aim 2, a novel catalytic growth mechanism will be studied, which could provide access to diverse metal nanocrystals not yet available using existing synthetic methods. Finally, in Aim 3, the mechanisms and pathways for the formation of multimetallic nanocrystals consisting of five or more elements will be examined. An important goal of this research is to gain a better fundamental understanding of the factors that control the structures and compositions of these classes of nanoparticles.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.

在化学系高分子、超分子和纳米化学项目的支持下，印第安纳大学伯明顿分校的叶星辰博士将开发制造纳米级金属合金的新方法，这些纳米颗粒除了可能表现出独特的化学和物理特性外，还含有地球。 -丰富的非贵重元素使其比常用的贵金属纳米颗粒更便宜且更可持续，有潜力推动清洁能源新技术的发展。叶博士表示，该项目的更广泛影响包括旨在提高 K-12 学生对科学的兴趣并提高本科生为 STEM 领域研究生学习做好准备的教育和推广活动。将开发一个名为“胶体-显微镜-数据”的课堂教学模块，让高中生了解胶体化学和显微镜成像的现代知识。此外，还将创建一个为期 8 周的暑期课程，以吸引本科生，特别是本科生。叶研究小组的目标是建立合成具有明确形状和成分的稀金属合金和复杂多金属纳米晶体的化学途径。在目标1中，将合成稀金属合金纳米晶体库。并进行表征，重点是非贵重但化学上更具挑战性的贱金属系统将评估这些纳米晶体的催化和等离子体特性。在目标 2 中，将研究一种新的催化生长机制，该机制可以提供使用现有合成方法无法获得的多种金属纳米晶体。最后，在目标 3 中，研究多金属纳米晶体的形成机制和途径。这项研究的一个重要目标是更好地了解控制此类纳米颗粒结构和成分的因素。该奖项反映了由五种或更多元素组成的纳米颗粒。通过使用基金会的智力价值和更广泛的影响审查标准进行评估，NSF 的法定使命被认为值得支持。

项目成果

Elucidating the role of seed structure in the heterometallic seeded growth of copper-based nanocrystals

• DOI: 10.3389/fnano.2023.1163390
• 发表时间: 2023-05-15
• 期刊: FRONTIERS IN NANOTECHNOLOGY
• 作者: Jeong, Soojin;Skalla, Rebecca X.;Ye, Xingchen
• 通讯作者: Ye, Xingchen