CAREER: Leading to Accelerated Discoveries in High-Throughput Ultrafast Laser-Driven Processing of High Entropy Alloy Nanoparticles

职业：加速高通量超快激光驱动高熵合金纳米粒子加工的发现

• 批准号: 2237820
• 负责人: Ritesh Sachan
• 金额: $ 52.92万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-04-01 至 2028-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2237820&HistoricalAwards=false
• 关键词: CAREER; Leading; Accelerated; Discoveries; Throughput

This Faculty Early Career Development (CAREER) award supports fundamental research that enables high-throughput creation of high entropy alloy nanoparticles (HEA NPs). HEA NPs are structures where multiple elements (typically five or more) are homogeneously mixed at nanoscale dimensions. This technique of fabricating NPs offers access to a large number of compositions of HEAs that have the ability to form unique microstructures, leading to new physical properties which can be applied in areas like catalysis in order to reduce the energy consumption of industrial processes. A key challenge to realizing the unique potential of HEA NPs is the lack of manufacturing processes that can access a large compositional and dimensional space of NPs and advance the fundamental understanding of process-structure-property correlations. This research project will aim to develop a laser-driven method that reliably allows the generation of HEA NPs with control over broad composition and size ranges. This project aims to generate extensive material libraries of HEA NPs, which can accelerate research to understand the across-the-scale (atomic-to-nano) structure of NPs and their correlation with the electro- and plasmonic catalytic properties. The integrated educational program of this project will disseminate the research activities to a broad community of students and teachers at the K-12, undergraduate, and graduate levels. These initiatives aim toward increasing the skilled workforce of engineers with improved participation of underrepresented American populations.This project aims to develop a high-throughput methodology to create HEA NPs with large compositional and dimensional space by employing a nanosecond pulsed laser-driven particle formation method. The pulsed laser processing on combinatorial multilayer/alloy ultrathin films (1-30 nm) facilitates the fabrication of well-defined isolated droplet-shaped HEA NPs of various compositions on substrates. These NPs are formed through the laser-induced melt-phase dewetting phenomenon, coupled with thermally-driven mass transport and ultrafast solidification in the nanosecond timescale. The success of this hypothesis-driven methodology will facilitate an accelerated fundamental understanding of the formation mechanism, governing factors, elemental distribution, and microstructures. The utilization of conventional and advanced data science driven characterization methods, such as 4D scanning transmission electron microscopy, will resolve the compositional and microstructural complexities to fill the knowledge gaps in understanding laser-material interactions for creating NPs. These results will have broader implications for advancing the fundamental science of microstructure correlations with the electro- and plasmonic catalytic properties of HEA NPs. The project will lead to the creation of new material libraries for HEA NPs and open up future opportunities for applications in catalysis and other areas. This project is jointly funded by the Advanced Manufacturing Program, the Established Program to Stimulate Competitive Research (EPSCoR), and the Metals and Metallic Nanostructures Program.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.

这项教师早期职业发展（职业）奖支持了基础研究，该研究能够创建高熵合金纳米颗粒（HEA NPS）。 HEA NP是在纳米级尺寸上混合多个元素（通常五个或更多）的结构。这种制造NP的技术可访问具有形成独特微观结构的大量HEAS组成，从而导致新的物理特性，这些物理特性可以在催化等领域应用，以减少工业流程的能源消耗。意识到HEA NP的独特潜力的一个主要挑战是缺乏可以访问NP的庞大构图和维空间的制造过程，并提高对过程结构 - 质量相关性的基本理解。该研究项目将旨在开发一种激光驱动的方法，该方法可靠地生成具有控制广泛成分和大小范围的HEAP。该项目旨在生成大量的HEA NP材料库，这些库可以加速研究以了解NP的整个尺度（原子与纳米）结构及其与电和等离子和等离子催化特性的相关性。该项目的综合教育计划将把研究活动传播给K-12，本科和研究生级别的广泛的学生和老师社区。这些举措旨在通过不足代表的美国人口的参与来提高工程师的熟练劳动力。该项目旨在通过采用纳米脉冲脉冲激光粒子粒子形成方法来开发具有较大构图和维度空间的Hea NP。组合多层膜（1-30 nm）上的脉冲激光加工有助于底物上各种组合物的各种组合物的定义明确的分离的液滴形状NP的制造。这些NP是通过激光诱导的熔融玻璃体易碎现象形成的，与热驱动的质量传输结合，并在纳米秒时尺度中形成超快的固化。这种假设驱动的方法的成功将有助于加速对形成机制，管理因素，元素分布和微观结构的基本理解。传统和先进数据科学驱动的表征方法（例如4D扫描传输电子显微镜）的利用将解决组成和微观结构复杂性，以填补知识差距，以了解为创建NP的激光 - 材料相互作用。这些结果将对推进与HEAP的电和等离子催化特性的微观结构相关性的基本科学具有更广泛的意义。该项目将导致创建用于HEAP的新材料库，并为催化和其他领域的应用开放未来的机会。该项目由高级制造计划，既定的竞争研究计划（EPSCOR）以及金属和金属纳米结构计划共同资助。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来支持的。

项目成果

Creation of Multi‐Principal Element Alloy NiCoCr Nanostructures via Nanosecond Laser‐Induced Dewetting

通过纳秒激光诱导去湿创建多主元合金 NiCoCr 纳米结构

• DOI: 10.1002/smll.202309574
• 发表时间: 2024
• 期刊: Small
• 影响因子: 13.3
• 作者: Mandal, Soumya;Gupta, Ashish Kumar;Konečná, Andrea;Shirato, Nozomi;Hachtel, Jordan A.;Sachan, Ritesh
• 通讯作者: Sachan, Ritesh