简 历：秦发祥，浙江大学“百人计划”研究员，第12批青年“千人计划”入选者。2010年取得Bristol大学航天工程博士学位，且被选为竞争RAE fellowship 的两个候选人之一；之后分别在法英日从事研究工作。迄今发表论文90余篇、国际专利2个、英文专著两本等。现担任Journal of Electronic Materials 副主编。中国复合材料学会青年工作委员会副主任委员、中国超材料学会常务理事。
题 目：Programmable Microwire Metacomposites
摘 要：Ferromagnetic microwires have been emerged as one of the most promising magnetic materials involved in various applications including magnetic sensors, structural health monitoring and biomedical engineering owing to their outstanding giant magneto-impedance effect and soft magnetic properties. Such properties confer them programmable strong responses to the incident microwaves to realize tunable wide band-stop and band-pass features through regulating the wire microstructure/property relationship and topological arrangement of the wires in the polymer matrix. In this talk, we will briefly review the recent progress of our group on developing novel strategies to achieve microwave tunability in composites containing these functional fillers. Structural modification of one type of microwire through suitable current annealing and arrangement of the annealed wires in multiple combinations are sufficient to distinctly red-shift the transmission dip frequency of the composites. Inspired by the enhancement in the mechanical and electromagnetic functionality of composites by addition of nano-carbons, we have also adopted the multiscale design philosophy by hybridizing nano-carbons with the microwire. By controlling the thickness and morphology of the CNT and degree of thermal reduction in the GO we are able to tune the negative permittivity characteristics of the composites incorporating such hybrid fibers. These programmable strategies broaden the scope of application of microwire metacomposites to cover areas such as miniaturized frequency selective surfaces, band-stop and band-pass filters, dual-band modulators, structural health monitoring and ultrasensitive field/stress sensors. Microwire metacomposites then integrate metamaterial and composite engineering concepts to realize smart composites with adaptive functionalities. Through adopting the single component-control and the multiscale approaches to metacomposites design their effective macroscopic properties are easily programmed from the materials perspective.