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Microtube fabrication based on femtosecond Bessel beam and its flexible driving with external magnetic field

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Microtube, with simple and uniform geometry, is one of the basic structures in micro/nano field. We present a method for the fabrication of magnetic drivable microtubes, by direct femtosecond laser writing com-bined with magnetron sputtering with metal layer. Femtosecond laser beam is modulated into Bessel beam with spatial light modulator (SLM), and then Bessel beam is focused with a high numerical aperture objective. Micro-tubes are fabricated by scanning focused femtosecond Bessel beam in a sample anchored on a three dimen-sion stage. Followed by magnetron sputtering a nickel layer, the microtubes exhibit supermagnetic property and can be flexibly driven by external magnetic field. In this study, the propagation and high numerical aperture fo-cusing properties of femtosecond Bessel beams are investigated. Microtubes, with well controlled diameter, length and distribution are efficiently fabricated. Rapid steering of nickel coated microtubes along specific route in fluid environment with external magnetic field has been realized. The steering of microtubes can be realized in various fluid environments. This method is flexible, controllable and efficient and the fabricated drivable mi-crotubes have a promising applications in noninvasive surgery, targeted drug delivery, bioimaging or biosensing and microenvironment cleaning.









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辛 晨:中国科学技术大学精密机械与精密仪器系,合肥 230026
杨 亮:中国科学技术大学精密机械与精密仪器系,合肥 230026
胡治江:中国科学技术大学精密机械与精密仪器系,合肥 230026
胡 凯:中国科学技术大学精密机械与精密仪器系,合肥 230026
钱冬冬:中国科学技术大学精密机械与精密仪器系,合肥 230026
胡衍雷:中国科学技术大学精密机械与精密仪器系,合肥 230026
李家文:中国科学技术大学精密机械与精密仪器系,合肥 230026
吴 东:中国科学技术大学精密机械与精密仪器系,合肥 230026

联系人作者:杨 亮(ygliang@ustc.edu.cn)

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Chen Xin,Liang Yang,Zhijiang Hu,Kai Hu,Dongdong Qian,Yanlei Hu,Jiawen Li,Dong Wu. Microtube fabrication based on femtosecond Bessel beam and its flexible driving with external magnetic field[J]. Opto-Electronic Engineering, 2017, 44(12): 1180-1186

辛 晨,杨 亮,胡治江,胡 凯,钱冬冬,胡衍雷,李家文,吴 东. 飞秒贝塞尔光用于可磁驱动微管道的高效加工[J]. 光电工程, 2017, 44(12): 1180-1186

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