Shin, Dongwoon Kim, Jonghyun Choi, Sun Lee, Yong-bok Chang, Jiyoung 2024-01-19T20:31:16Z 2024-01-19T20:31:16Z 2021-09-02 2019-04 0960-1317 https://pubs.kist.re.kr/handle/201004/120171 This study presents a novel droplet-jet mode of near-field electrospinning which allows microscale control of helix patterns using nanofiber. While the cone jet mode has been used to generate a printable nanofiber to date, the cone jet mode requires a high applied voltage with a long jet travel distance to obtain the nanofiber, resulting in a large coiling diameter. In order to integrate the near-field electrospinning into microscale devices, it is important to achieve a comparable nanofiber pattern resolution. Herein, we have demonstrated printing of nanofibers with a coiling diameter of sub-10 mu m, which is produced by the droplet-jet mode of near-field electrospinning. Also, it is found that the coiling diameter, wavelength, and frequency can be controlled by the droplet size as one of the process parameters in the droplet-jet mode. The droplet-jet mode will be a promising near-field electrospinning technique to apply direct-written nanofibers to various micro-scale applications. English IOP PUBLISHING LTD ELECTROHYDRODYNAMIC JET NANOFIBER OPTIMIZATION DESIGN Droplet-jet mode near-field electrospinning for controlled helix patterns with sub-10 mu m coiling diameter Article 10.1088/1361-6439/ab025e 1 JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.29, no.4 JOURNAL OF MICROMECHANICS AND MICROENGINEERING 29 4 scie scopus 000459439800001 2-s2.0-85064085564 Engineering, Electrical & Electronic Nanoscience & Nanotechnology Instruments & Instrumentation Physics, Applied Engineering Science & Technology - Other Topics Instruments & Instrumentation Physics Article ELECTROHYDRODYNAMIC JET NANOFIBER OPTIMIZATION DESIGN nanofiber near-field electrospinning droplet electrohydrodynamic printing microscale printing direct-writing