CAREER: Dynamics of Binary Anisotropic Magnetic Colloids

该奖项将解决胶体科学中的主要挑战之一，通过开发一个定量和数值框架来模拟由不同形状和材料特性的颗粒组成的悬浮液的平衡和动力学以及它们在磁场中的相互作用。该项目将建立不同形状的相互作用粒子之间的联系，以及它们在磁场影响下的排列。将确定产生结构的动态激励的相互作用粒子之间的相互关系。通过该项目获得的基本见解将有助于实现各向异性胶体在不同应用中的潜力，如可调材料和多驱动纳米机器人、极化表面、磁流变学、活性悬浮液、药物输送和磁热治疗等。此外，该奖项将通过为当地在校学生和阿拉巴马大学亨茨维尔分校的本科生举办活动，开发英语和西班牙语课程内容，促进代表人数不足的群体的参与。此外，制作有关胶体相互作用和纳米机器人在磁场中的操纵的视频和动画内容，将教育普通公众这些相互作用如何在胶体技术中发挥重要作用，以及这些组装的结构可能如何影响我们未来的生活。该奖项将通过建立新的方法来分析和量化非对称各向异性胶体粒子的相互作用，使用二元系统来促进具有不同空间顺序和取向对称性的结构，并产生一个理论框架，从而系统地促进对椭球体组成的胶体悬浮液的理解，从而使合理的方法能够应用于新的应用。该项目将开发一个具有新的定量和数值框架的强大的研究计划，使用单位四元数参数和新的椭球-偶极近似来模拟磁场影响下由不同形状和材料性质的椭球组成的悬浮体的平衡和动态行为。该项目将开发一种系统的分析，将不同形状和材料性质的椭球体的相互作用能量、力和扭矩作为其相对位置和方向的函数进行量化。此外，该奖项将通过生成描述由椭球体组成的多致动微型和纳米机器人组装的模型，并支持合理的方法来推进极化表面组装中的应用，从而促进对流体动力学、流变学和纳米技术的基本理解。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。

This award will address one of the main challenges in colloid science by developing a quantitative and numerical framework to model the equilibrium and dynamics of suspensions composed of particles with different shapes and material properties and their interactions in magnetic fields. The project will establish the connections between the interacting particles with different shapes and their arrangement under the influence of a magnetic field. The interrelation between the interacting particles to generate a dynamic actuation of the structures will be determined. The fundamental insights obtained through this project will help realize the potential of anisotropic colloids in different applications, such as tunable materials and multi-actuating nanorobots, polarized surfaces, magneto-rheology, active suspensions, drug delivery, and magnetic hyperthermia, among others. Additionally, this award will promote the participation of underrepresented groups through activities for local school students and undergraduate students at the University of Alabama in Huntsville, developing course content in English and Spanish. Moreover, creating video and animated content on colloidal interactions and nanorobot manipulation in magnetic fields will educate the general public on how these interactions play an important role in colloidal technologies and how these assembled structures may affect our future life. This award will systematically advance the understanding of colloidal suspensions composed of ellipsoids by establishing new approaches to analyze and quantify the interactions of non-symmetric anisotropic colloidal particles, using binary systems to promote structures with different spatial order and orientational symmetry, and generating a theoretical framework that will enable a rational approach to novel applications. The project will develop a strong research program with a novel quantitative and numerical framework, using unit quaternion parameters and the novel ellipsoid-dipole approximation, to model the equilibrium and dynamic behavior of suspensions composed of ellipsoids with different shapes and material properties under the influence of magnetic fields. The project will develop a systematic analysis quantifying the interaction energy, force, and torque of ellipsoids with different shapes and material properties as a function of their relative positions and orientations. Furthermore, this award will advance the fundamental understanding of hydrodynamics, rheology, and nanotechnology by generating models that describe assembly of multi-actuating micro and nanorobots composed of ellipsoids and enabling rational approaches to advancing applications in assembly of polarized surfaces.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.