Gil Manjae, Moon Seongjun, Yoon Jaewon, Rhamani Sahar, Shin Jae-Won, Lee Kyung Jin, Lahann Joerg
Department of Fine Chemical Engineering and Applied Chemistry College of Engineering Chungnam National University 99 Daehak-ro (st) Yuseong-gu Daejeon 305-764 Republic of Korea.
Macromolecular Science and Engineering University of Michigan Ann Arbor MI 48109 USA.
Adv Sci (Weinh). 2018 Apr 19;5(6):1800024. doi: 10.1002/advs.201800024. eCollection 2018 Jun.
Anisotropically compartmentalized microparticles have attracted increasing interest in areas ranging from sensing, drug delivery, and catalysis to microactuators. Herein, a facile method is reported for the preparation of helically decorated microbuilding blocks, using a modified electrohydrodynamic cojetting method. Bicompartmental microfibers are twisted in situ, during electrojetting, resulting in helical microfibers. Subsequent cryosectioning of aligned fiber bundles provides access to helically decorated microcylinders. The unique helical structure endows the microfibers/microcylinders with several novel functions such as translational motion in response to rotating magnetic fields. Finally, microspheres with helically patterned compartments are obtained after interfacially driven shape shifting of helically decorated microcylinders.
各向异性分隔的微粒在从传感、药物递送、催化到微致动器等领域引起了越来越多的关注。在此，报道了一种使用改进的电流体动力学共喷射方法制备螺旋装饰微结构单元的简便方法。在电喷射过程中，双隔室微纤维原位扭转，形成螺旋微纤维。随后对排列的纤维束进行冷冻切片，可得到螺旋装饰的微圆柱体。独特的螺旋结构赋予微纤维/微圆柱体多种新功能，如响应旋转磁场的平移运动。最后，通过螺旋装饰微圆柱体的界面驱动形状转变，获得了具有螺旋图案隔室的微球。
