利用纳秒脉冲激光在 SUS430 上形成的周期性结构的抗菌效果

IF 1.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Laser Applications Pub Date : 2023-11-01 DOI:10.2351/7.0001196

Mikuru Okazaki, Masaki Hashida, Satoru Iwamori

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引用次数: 0

摘要

我们研究了用纳秒脉冲激光（Nd:YAG，波长 532 nm，脉宽 10 ns，脉冲数 50，重复频率 10 Hz，激光能量 1.2 J/cm2）照射 SUS430 表面所形成的激光诱导周期性表面结构（LIPSS）及其抗菌效果。当脉冲激光接近烧蚀阈值时，表面会产生间距约为 500 nm（接近激光波长）的 LIPSS。使用薄膜附着法（JIS Z 2801）测量了有 LIPSS 和没有 LIPSS 的 SUS430 表面的细菌生长抑制情况。在没有 LIPSS 的表面上，菌落数为 1244 个，而在有 LIPSS 的表面上，菌落数为 198 个，这表明纳秒脉冲激光照射形成的 LIPSS 抑制了细菌的生长。带有 LIPSS 的 SUS430 表面上的氧化铬层可能会从 LIPSS 边缘发射铬离子，从而增强抗菌效果。

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Antibacterial effect of periodic structure formed on SUS430 by using nanosecond pulsed laser

We investigated the laser-induced periodic surface structures (LIPSSs) formed on an SUS430 surface by irradiation with a nanosecond pulsed laser (Nd:YAG, wavelength of 532 nm, pulse width of 10 ns, number of pulses of 50, repetition rate of 10 Hz, and laser fluence of 1.2 J/cm2) and the antibacterial effect of the surface. LIPSSs with an interspacing of about 500 nm, which was close to the laser wavelength, were produced on the surface when the pulsed laser was near the ablation threshold. The film attachment method (JIS Z 2801) was used to measure the bacterial growth suppression on SUS430 surfaces with and without LIPSSs. On the surface without an LIPSS, the number of colonies was 1244, and on that with an LIPSS, the number was 198, indicating that the LIPSS formed by nanosecond pulsed laser irradiation inhibited the growth of bacteria. The chrome oxide layer on the SUS430 surface with the LIPSS may emit chrome ions from the edge of the LIPSS, enhancing the antibacterial effect.

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来源期刊

Journal of Laser Applications 物理-光学

CiteScore

3.60

自引率

9.50%

发文量

125

审稿时长

>12 weeks

期刊介绍： The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.