Materials World Network: Anisotropic Colloidal Magnetic Nanostructures

在新兴的功能纳米材料中，磁性纳米结构在许多新现象和不同的应用中占据了重要的地位。西北大学和孟买印度理工学院（IITB）之间的材料世界网络的拟议联合项目，重点关注迄今为止未被充分代表的形状各向异性和磁性纳米结构的组成域的考虑，以及它们对关键现象的影响，如MRI中的质子弛豫，细胞转染和RF加热特性的亲和力。研究的重点是各向异性和复杂多组分磁性纳米结构的合成和表征。在这里，各向异性意味着磁性纳米结构的形态和形状的多样性与尖锐的物理特征，如纳米棒，纳米三角形和纳米枝晶，相比，等轴球形对应物。纳米结构中的各向异性的作用最近被认为是非常重要的，导致了光子学，相位和相关电磁波传播的令人兴奋的前景。此外，磁性纳米结构的组合相当有限，磁性氧化铁和裸金属/合金系统是过去的主要焦点。拟议的工作将扩展纳米磁性组合各向异性的形态，多组分氧化物，和保护的核心（金属/合金）-壳（氧化物）的双重结构。新的合成，广泛的表征与电子和光学显微镜，磁共振，原位同步辐射和细胞转染的组合将有助于解开胶体悬浮液，表面功能化和形状/尺寸各向异性在磁性纳米结构应用中的作用的基本方面。这对MRI成像、生物技术、磁传感器和相关领域具有相当大的影响。 拟议的工作跨越物理科学，工程和生物学的界面，所有这些都是通过创新材料研究实现的。它将广泛利用先进的互联网和基于网络的交互式门户网站，并帮助确定其在国际合作研究中的适当作用。西北大学的高带宽Internet-2主干网和IITB同样令人印象深刻的通信设施将用于提供实时成像和数据采集。除了学生和高级PI的明显交流之外，每个合作伙伴都将参与开发基于磁性胶体的演示模块，用于UG课程，高中团体和当地科学博物馆。该项目将纳入磁性纳米结构短期课程的研究进展，在ASME-NU纳米训练营提供。该项目将在我们所有的招聘工作中展示先进的材料研究，包括积极参与REU和MIN计划。 该奖项由NSF国际科学与工程办公室（OISE）的Sout亚洲项目和DMR的陶瓷（CER）项目共同资助。

Among emerging functional nanomaterials, magnetic nanostructures have carved an important niche in multitude of novel phenomena and diverse applications. The proposed joint project for the Materials World Network, between Northwestern University and the Indian Institute of Technology, Bombay (IITB), focuses on hitherto underrepresented considerations of shape anisotropy and compositional domain of magnetic nanostructures, and their influence on critical phenomena such as proton relaxation in MRI, affinity for cellular transfection and RF heating characteristics. The focus of the research is on synthesis and characterization of anisotropic and complex multicomponent magnetic nanostructures. Here, anisotropy implies magnetic nanostructures with morphological and shape diversity with sharp physical features such as nano-rods, nano-triangles and nano-dendrites, compared to the equiaxed spherical counterparts. The role of anisotropy in nanostructures has recently assumed significant importance, leading to exciting prospects in photonic, phasmonic and related electromagnetic wave propagation. In addition, the portfolio of magnetic nanostructures has been rather limited, with magnetic iron oxides and bare metal/alloys systems being the majority focus in the past. The proposed work will extend the nanomagnetic portfolio to anisotropic morphologies, multicomponent oxides, and protected core (metal/alloy)-shell (oxide) duplex structures. The combination of novel synthesis, extensive characterization with electron and light microscopies, magnetic resonance, in-situ synchrotron radiation, and cellular transfection will help unravel fundamental aspects of colloidal suspension, surface functionalization and role of shape/size anisotropy in magnetic nanostructures applications. This has considerable implications for MRI imaging, biotechnology, magnetic sensors and related fields. The proposed work straddles at the interface of physical sciences, engineering and biology, all enabled by innovative materials research. It will make extensive use of and help define proper role of advanced internet and web-based interactive portals for international collaborative research. The high bandwidth Internet-2 backbone at Northwestern and equally impressive communication facilities at IITB, will be utilized to provide real-time access to imaging and data acquisition. Over and above the obvious exchange of students and senior PIs, each partner will engage in development of demonstrative module based on magnetic colloids for UG classes, high-school groups and local science museums. The project will incorporate research advances in short-course on magnetic nanostructures, being offered at the ASME-NU nano bootcamp. The project will showcase advanced materials research in all our recruiting efforts, including active participation in REU and MIN programs. This award is being co-funded by the Sout Asia program of the NSF Office of International Science and Engineering (OISE), and by the Ceramics (CER) program in DMR