Nanoparticles with Stainless Interfaces: Void Symmetry Control and New Compositions for Applications in Energy Transfer Storage and Biotechnology

非技术总结：该研究有望克服研究人员合成金属合金纳米结构所遇到的许多挑战。 使用核/合金方法，将合成尺寸范围为5至50 nm的纳米颗粒，其具有由铁、铬、镍、铝和钛组成的不锈钢界面。这些纳米材料合金预计具有独特的相行为，氧化性能和空隙/缺陷形态。 该项目的最终目标是：开发新的“湿化学”合成策略来制备纳米材料，了解由此产生的氧化和相行为，并控制该行为，以构建在能源和生物技术领域具有实用性的新型结构。一个博士后研究员和多个研究生和本科化学学生将得到支持。该研究员将获得宝贵的专业发展，并沿着学生，将获得宝贵的经验和培训，在尖端纳米材料科学，材料化学和相关的仪器技术。 PI将促进少数民族学生参与该项目，并继续指导妇女从事专业STEM职业。这项工作将对材料化学和纳米科学社区在北部锡拉丘兹纽约地区产生深远的影响，通过外联活动，增强本科生和研究生课程的工作，并通过举办一个区域研讨会纳米科学，汇集了来自该地区的研究人员具有相似的兴趣。技术概要：该项目探讨了合金成分、相行为和氧化特性可用于控制纳米材料内部微观结构的假设。多年来，研究人员已经掌握了许多纳米结构的尺寸和形状控制所需的合成，今天的重点正在转向能够以极高的精度处理这些材料的内部结构。 为了实现这一目标，我们将准备新的纳米合金界面与不锈钢一样的组合物，将被用作化学工具来控制界面氧化速率，这反过来又会改变缺陷和空位的Kirkendall扩散。这将允许制备具有形态上限定的空隙空间的纳米颗粒，包括不对称的，其可以用1-5 nm的保真度控制。 本计画的目标是制造新的非贵金属奈米合金，利用合金的组成、相行为与氧化特性来操控内部的孔洞结构，并将这些技术联合收割机结合来调整内部孔洞的对称性与层级。 此外，在该项目的过程中，将尝试一些新的纳米合金界面，包括钛和铝基医疗和超合金。这些新的纳米材料将立即应用于从能源到生物技术领域，包括气体储存、多相催化和电池技术，以及医用合金表面和涂层。

NON-TECHNICAL SUMMARY: The research is expected to overcome a number of challenges encountered by researchers synthesizing metal alloy nanostructures. Using a core/alloy approach, nanoparticles in the size range of 5 to 50 nm will be synthesized with stainless interfaces that are made up of iron, chromium, nickel, aluminum and titanium compositions. These nanomaterial alloys are expected to have unique phase behavior, oxidation properties, and void/defect morphologies. The ultimate goals of this project are to; develop new "wet-chemical" synthesis strategies to prepare the nanomaterials, to understand the resulting oxidation and phase behavior, and to control that behavior in order to construct novel structures that have utility in energy and biotechnology sectors. A postdoctoral fellow and multiple graduate and undergraduate chemistry students will be supported. The fellow will gain valuable professional development, and along with the students, will gain valuable experience and training in cutting edge nanomaterial science, materials chemistry and associated instrumental techniques. The PI will promote minority student involvement in the project, and continue his work in guiding women to professional STEM careers. The work will have a profound affect on the materials chemistry and nanoscience communities in the upstate Syracuse New York region through outreach events, enhancements to undergraduate and graduate course work and via hosting a regional workshop on nanoscience that brings together researchers with similar interests from the region. TECHNICAL SUMMARY: This project explores the hypothesis that alloy composition, phase behavior, and oxidation characteristics can be use to control the internal microstructure of nanomaterials. Over the years researchers have mastered the synthesis required for size and shape control of many nanostructures, and today focus is shifting towards being able to process the internal structure of these materials with great precision. To accomplish this goal, we will prepare new nano-alloy interfaces with stainless steel like compositions that will be used as a chemical tool to control interfacial oxidation rates, which in turn will alter Kirkendall diffusion of defects and vacancies. This will allow for the preparation of nanoparticles with morphologically defined void spaces, including asymmetric ones, which can be controlled with 1-5 nm fidelity. The goals of this project are to fabricate new non-noble metal nano alloys, to use alloy composition, phase behavior, and oxidation properties to manipulate the internal void structure, and to combine these technologies to tailor internal void symmetry and hierarchy. Moreover, through the course of the project, a number of novel nano-alloy interfaces will be attempted, including titanium and aluminum based medical and super-alloys. These new nanomaterials will have immediate applications ranging from the energy to biotechnology sectors, including; gas storage, heterogeneous catalysis and battery technologies, as well as medical alloy surfaces and coatings.