CAREER: A Multi-modal Study of Bi-continuous Pattern Formation in Nano/Meso Composite and Porous Metals Films via Solid-State Interfacial Dealloying

非技术概述：对材料在多个时间和空间尺度上的基本动力学和热力学的理解将导致设计新的建筑的优雅方法，从而为社会带来新的能力和好处。在这一总体目标的推动下，该学院早期职业发展(CALEAR)奖支持研究一种新兴的通用方法，以制造纳米/介观尺度的互连双连续金属-金属复合材料和高表面多孔金属。该项目将使在传感、驱动、储能和催化等广泛重要领域具有新功能的新材料的设计成为可能。该职业奖项还将支持基于石溪大学(SBU)和布鲁克海文国家实验室(BNL)合作的综合教育计划。这些努力将激励和培养多样化的学生群体，学习材料科学和工程，这是我们社会未来的关键技术。特别是，学生将从获得在国家同步辐射光源II(NSLS-II)使用先进的同步辐射X射线技术学习材料的机会中受到启发。在大学、国家实验室和社区之间建立协同作用将使学生、研究人员和普通民众直接受益，因为他们能够参与正在进行的研究并/或从正在进行的研究中获得灵感和知识。技术总结：该职业奖将支持重点研究一种新兴的脱合金化过程：固态界面脱合金化(SSID)。SSID是一种自组织过程，是一种在纳米/介观尺度上制备双连续金属-金属复合材料和多孔金属的通用方法。SSID为合成这种结构开辟了一条新的途径，特别是在非贵金属中。SSID还有可能用于制备具有高热稳定性和化学反应活性的高比表面积金属/金属氧化物。这些材料的加工-结构-性能关系将用原位同步加速器技术来表征。将在NSLS-II上结合不同的X射线技术，实施多模式方法。该方案的研究目标是：1)通过SSID工艺制备一类新的纳米/介观金属-金属复合材料和多孔金属薄膜；2)了解控制其形态、结构和化学成分演变的基本机制；3)将加工和结构与热性能和化学性质联系起来。这项建议的教育目标是通过个人研究参与和指导，以及课程开发，将同步加速器技术整合到材料科学和工程教育中。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Non-Technical Summary: Fundamental kinetics and thermodynamics understanding in materials across multiple time and spatial scales will lead to elegant methods for designing novel architectures that enable new capabilities and benefits for society. Driven by this overarching goal, this Faculty Early Career Development (CAREER) award supports research to examine an emerging versatile method for fabricating interconnected bi-continuous metal-metal composites and high-surface porous metals at nano/meso scales. The project will enable the design of new materials possessing new functions in a wide range of important fields, including sensing, actuating, energy storage and catalysis. This CAREER award will also support an integrated educational plan based on a Stony Brook University (SBU) - Brookhaven National Laboratory (BNL) collaboration. The efforts will inspire and grow a diverse student body to pursue materials science and engineering, a critical technology for our society's future. In particular, students will be inspired by gaining opportunities to study materials using advanced synchrotron X-ray techniques at the National Synchrotron Light Source II (NSLS-II). Creating synergy between a university, a national laboratory and the community will directly benefit students, researchers and the general population by enabling them to work in and/or gain inspiration and knowledge from the research being performed. Technical Summary: This CAREER award will support research that focuses on examining an emerging dealloying process: solid-state interfacial dealloying (SSID). A self-organizing process, SSID is a versatile method for fabricating bi-continuous metal-metal composites and porous metals at nano/meso scales. SSID opens a new route to synthesize such structures, particularly in non-noble metals. SSID may also potentially be used to create high surface area metal/metal oxides with high thermal stability and chemical reactivity. The processing-structure-property correlations in these materials will be characterized by in situ synchrotron techniques. A multi-modal approach will be implemented by combining different X-ray techniques at NSLS-II. The research objectives of this proposal are 1) to create a new class of nano/meso metal-metal composites and porous metal films via this SSID process, 2) to understand the fundamental mechanisms that govern its material evolution in morphology, structure and chemical composition, and 3) to correlate processing and structure with the thermal and chemical properties. The educational objectives of this proposal are to integrate synchrotron techniques in materials science and engineering education through personal research engagement and mentoring, as well as curriculum development.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.