摘要
Fiber is one of the most fundamental material forms seen in human life.Beftting from their long and bendable shape,fbers with diferent specialties and diferent dimensions are used in a multitude of applications,ranging from fabrics[1]to telecommunications[2],from generating laser[3]to sensing and actuating,etc.[4-6].In recent years,major breakthroughs were made,demonstrating that fbers have novel optical[7-9],electronic[10],acoustic[11,12]and cell interfacing[13,14]properties that enable new functionalities.Functional fbers and related application research are at the crossroads of many disciplines,including optics,materials science,device physics,nanotechnology,and fuid dynamics.