Article
Nanoscience & Nanotechnology
Shuai Yang, Meng Li, Chu Li, Linyu Yan, Qiang Li, Qihuang Gong, Yan Li
Summary: Self-propelled autonomous devices have wide application potential in energy conservation, environmental protection, and biomedical engineering. However, traditional driving forces often require external energy or special chemicals. In this study, a novel and environmentally friendly droplet-driven device (DDD) was developed, which consists of superhydrophilic triangles on a superhydrophobic plate processed solely by a femtosecond laser. The DDD is driven by a water droplet flow along a superhydrophilic channel and can be manipulated by changing the point angle of the triangle and the volume of the droplet. By fabricating multiple or special channels, the DDD can translate, rotate, and even carry objects, providing a new approach for the fabrication of green self-propelled autonomous devices and their application in intelligent systems and environmental protection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Fan Zhang, Haoran Wang, Kai Yin, Ji'an Duan
Summary: A new method using femtosecond laser to fabricate antireflective microstructures on zinc sulfide surfaces has been proposed in this study, effectively suppressing surface Fresnel reflection and regulating the reflectance spectra and wettability.
OPTICS AND LASER TECHNOLOGY
(2022)
Review
Plant Sciences
Arjun Kafle, Hannah E. R. Frank, Benjamin D. Rose, Kevin Garcia
Summary: This review compiles and discusses the methods and applications of split-root assays in the study of arbuscular mycorrhizal and ectomycorrhizal symbioses, highlighting their importance in understanding mycorrhizal associations.
JOURNAL OF EXPERIMENTAL BOTANY
(2022)
Article
Optics
Yujia Guo, Kaixin Zhang, Ming Zhang, Yingjie Chai, Ying Du, Guohang Hu
Summary: Gold nanojets with various morphologies, fabricated on gold thin film by femtosecond laser irradiation, exhibit near-field localized surface plasmon resonance and photothermal effects, supporting potential applications in high-resolution imaging, nanomanipulation, and sensing. Confined electron oscillations in LSPR lead to intense local EM field enhancement, improving vertical resolution down to nanoscale at the end of gold tip. Periodic nanojet arrays printed with different geometries show potential as refractometric sensors with high sensitivity and reproducibility, promoting fs laser printing as a precise tool for nanoarchitecture in optical imaging, nanomanipulation, and sensing applications.
Article
Engineering, Electrical & Electronic
Xue-Qing Liu, Rong Cheng, Jia-Xin Zheng, Shuang-Ning Yang, Bao-Xu Wang, BenFeng Bai, Qi-Dai Chen, Hong-Bo Sun
Summary: Blazed gratings can concentrate light energy to desired diffraction orders in optical detection devices. By utilizing femtosecond laser lithography and reactive ion etching on sapphire substrates, blazed gratings with high mechanical stability were fabricated, providing insights for the construction of micro-optical devices with potential applications under harsh conditions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Bing Wang, Wenyuan An, Liang Wang, Lishi Jiao, Hongsheng Zhang, Haiying Song, Shibing Liu
Summary: This paper investigates the fabrication method of micro/nano hierarchical superhydrophobic surface on 304 stainless steel and the enhancement of antibacterial property by coating hydrophobic coating and structuring ZnO nanowires.
Article
Physics, Applied
Jialiang Zhang, Qing Yang, Qingyun Ma, Fangzheng Ren, Haoyu Li, Chengjun Zhang, Yang Cheng, Feng Chen
Summary: The study prepared a slippery surface with excellent self-cleaning, stability, and self-healing properties, inspired by the Nepenthes plant. The stretchability of the slippery surface is essential for application in flexible sensor surfaces. By using femtosecond laser, an interconnected porous structure was prepared on pre-stretched polydimethylsiloxane, and then infused with lubricant to create the slippery surface. This stretchable slippery surface maintained its performance even under tensile conditions and after multiple stretch cycles, demonstrating remarkable self-cleaning and chemical stability. The femtosecond laser direct writing technique holds promise for stable surfaces in various extreme environmental applications of flexible electronic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yang Liu, Lan Jiang, Xiaowei Li, Peng Yi, Ji Huang, Yunxia Ye, Zhipeng Wang
Summary: This study proposes a coloring method using a spatially modulated femtosecond laser hybrid technology to achieve single-pixel control and dynamic adjustment of structural colors. The fabricated microcurve surface exhibits bright colors under white light irradiation, and the color of each pixel can be adjusted independently by changing the morphology of the modified region. By accurately controlling the arrangement of microcurve surfaces, different color patterns can be fabricated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Hongchen Du, Nian Zhang, Baoxing Xiong, Xiang Zhang, Xiao Yuan
Summary: This study utilizes femtosecond laser direct writing (FsLDW) to fabricate micro-nano-perforated structures with different periods and diameters on polyester (PET) films, and then embosses the perforated structures onto polyvinylidene fluoride (PVDF) films to create sensors with circular truncated cone (CTC) structures. The effect of period and diameter on sensor sensitivity is investigated numerically and experimentally. The results show that a high sensitivity of 8.98 mV/KPa can be achieved in a PVDF film pressure sensor with a period of 50 μm and a diameter of 30 μm, which is approximately 10.9 times that of the structureless sensor. This work not only provides a rapid fabrication method for pressure sensors using femtosecond laser and hot embossing, but also holds potential for micro-signal detection.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Xinran Dong, Li Zeng, Dongkai Chu, Xiaoyan Sun, Ji'an Duan
Summary: This research investigates the high temperature properties of fiber Bragg gratings (FBGs) fabricated by overexposure using femtosecond laser phase mask technology. The overexposed FBG (FBG-II) exhibits temperature resistance up to 1000 degrees C and a reflection intensity of over 12 dB after air cooling treatment. The temperature stability of FBG-II can be significantly enhanced through rapid air cooling treatment, with higher air cooling rates yielding more significant effects.
Article
Optics
Ying-De Wang, Ze-Zheng Li, Yi-Chun Li, Yan-Zhao Duan, Li-Cheng Wang, Yan-Hao Yu, Qi-Dai Chen
Summary: Optical waveguides prepared by femtosecond laser direct writing have birefringent properties, which can affect polarization encoding and entanglement on chips. In this study, we propose a shape-stress dual compensation fabrication scheme to decrease birefringence and obtained ultralow birefringent waveguides (1 x 10(-9)) by controlling the shape and position of the waveguide. We also demonstrate the evolution of polarization-independent waveguide array with different polarized light and suggest that ultralow birefringent waveguides will have extensive applications in polarization encoding and entangled quantum photonic integrated circuits.
Review
Materials Science, Multidisciplinary
Jiawei Li, Chun Cao, Yiwei Qiu, Cuifang Kuang, Xu Liu
Summary: As the most fundamental unit of photonic integration, optical waveguides offer the possibility of developing efficient and practical photonic chips by facilitating the on-chip integration of devices with different functions. Femtosecond direct laser writing (FsDLW), as a burgeoning 3D microfabrication technology, can realize the rapid formation of arbitrary optical waveguides without any mask inside versatile materials. This review provides an overview of the different optical loss types and suitable measurement methods, summarizes the fabrication mechanisms, discusses the application fields and development prospects of different materials, and concludes with insights and perspectives of the future development of optical waveguides and processing technology via FsDLW.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Yuchun He, Kai Yin, Lingxiao Wang, Tingni Wu, Qinwen Deng, Yapeng Dou, Christopher J. Arnusch
Summary: A magnetically actuated superhydrophilic robot sphere (MSR) based on femtosecond laser direct writing technology is developed for droplet steering. The MSR with uniform micro-/nanostructures on its surface can be remotely controlled to transport droplets using a contactless magnetic actuator. The method provides a novel and reliable approach for droplet manipulation and broadens its application.
Article
Multidisciplinary Sciences
Chen Xin, Zhongguo Ren, Leran Zhang, Liang Yang, Dawei Wang, Yanlei Hu, Jiawen Li, Jiaru Chu, Li Zhang, Dong Wu
Summary: The authors developed micrometer scale soft robots with multiple microjoints that can achieve different deformation modes, utilizing a two-in-one femtosecond laser strategy to create microactuators composed of hydrogel and metal nanoparticles. These microactuators have short response times and require low actuation power. The ability to integrate multiple microjoints into soft robots at the micrometer scale represents a significant challenge.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jovan Maksimovic, Haoran Mu, Molong Han, Daniel Smith, Tomas Katkus, Vijayakumar Anand, Yoshiaki Nishijima, Soon Hock Ng, Saulius Juodkazis
Summary: Ultra-short 230 fs laser pulses of 515 nm wavelength were focused to 700 nm spots on a Cr etch mask, creating similar to 400 nm nano-holes. The ablation threshold was found to be 2.3 nJ/pulse, and lower energies produced nano-disks while higher energies produced nano-rings. The controlled alloying of Si and Cr on large surface areas with sub-diffraction resolution was achieved using subtle sub-1 nJ pulse energy control.
Article
Biochemical Research Methods
Dong Wu, Li-Gang Niu, Si-Zhu Wu, Jian Xu, Katsumi Midorikawa, Koji Sugioka
Article
Microscopy
Kazuo Umemura, Yusuke Sadoya, Kazuki Nagao, Ryota Oikawa, Yasutaka Hanada, Koji Sugioka, Shigeki Mayama
Article
Biochemical Research Methods
Yasutaka Hanada, Tatsuya Ogawa, Kazuhiko Koike, Koji Sugioka
Article
Materials Science, Multidisciplinary
Steven M. Yalisove, Koji Sugioka, Costas P. Grigoropoulos
Article
Multidisciplinary Sciences
Chenchu Zhang, Yanlei Hu, Wenqiang Du, Peichao Wu, Shenglong Rao, Ze Cai, Zhaoxin Lao, Bing Xu, Jincheng Ni, Jiawen Li, Gang Zhao, Dong Wu, Jiaru Chu, Koji Sugioka
SCIENTIFIC REPORTS
(2016)
Article
Multidisciplinary Sciences
Bing Xu, Wen-Qiang Du, Jia-Wen Li, Yan-Lei Hu, Liang Yang, Chen-Chu Zhang, Guo-Qiang Li, Zhao-Xin Lao, Jin-Cheng Ni, Jia-Ru Chu, Dong Wu, Su-Ling Liu, Koji Sugioka
SCIENTIFIC REPORTS
(2016)
Article
Multidisciplinary Sciences
Fei He, Junjie Yu, Yuanxin Tan, Wei Chu, Changhe Zhou, Ya Cheng, Koji Sugioka
SCIENTIFIC REPORTS
(2017)
Editorial Material
Engineering, Manufacturing
Koji Sugioka
Summary: The GHz burst mode of femtosecond laser pulses can improve ablation efficiency without deteriorating ablation quality. However, optimizing the parameters involved in GHz burst mode poses challenges for practical implementation. The author’s perspective article examines the history, current status, and future challenges and prospects of this new strategy in femtosecond laser processing.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Francesc Caballero-Lucas, Kotaro Obata, Koji Sugioka
Summary: Ultrashort laser pulses can achieve precise material ablation by confining the processing area and suppressing heat diffusion. However, challenges arise when high speed material removal and higher ablation efficiencies are required. A study found that combining GHz bursts with MHz bursts in BiBurst mode significantly improves the ablation efficiency of silicon. Under optimal conditions, BiBurst mode can ablate a volume 4.5 times larger than single pulse mode ablation while delivering the same total energy.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Shota Kawabata, Shi Bai, Kotaro Obata, Godai Miyaji, Koji Sugioka
Summary: This study explores the ability of GHz burst mode femtosecond laser pulses to create two-dimensional laser-induced periodic surface structures (LIPSS) on silicon. The formation mechanism of these structures is attributed to the synergistic contribution of the electromagnetic mechanism and the hydrodynamic mechanism, including the generation of hot spots and convection flow.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Kotaro Obata, Francesc Caballero-Lucas, Shota Kawabata, Godai Miyaji, Koji Sugioka
Summary: To achieve high-throughput material removal, higher laser intensities are preferred, but they can have detrimental effects on ablation quality. This paper introduces a BiBurst femtosecond laser pulse method that prevents air breakdown and increases ablation speed by a factor of 23 without deteriorating ablation quality under conditions where air ionization is avoided.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2023)
Article
Engineering, Biomedical
Daniela Serien, Aiko Narazaki, Koji Sugioka
Summary: Femtosecond laser direct write (fs-LDW) is a promising technology for high-resolution, flexible, and versatile three-dimensional printing using protein solution as a precursor. The diverse proteins with different native functions enable various applications of this technology. However, the lack of understanding of the printing mechanism hampers the design and generation of 3D microstructures for biomedical applications. In this study, we used eight commercially available homopeptides as precursors and found that tyrosine, histidine, glutamic acid, and lysine contribute more to the fabrication process, indicating the involvement of ions in addition to the previously proposed radical mechanism. The findings suggest that the uneven electron density over larger amino acid molecules plays a significant role in aiding fs-LDW.
ACTA BIOMATERIALIA
(2023)
Article
Engineering, Manufacturing
Dongshi Zhang, Liang-Chun Wu, Masashi Ueki, Yoshihiro Ito, Koji Sugioka
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2020)
Article
Engineering, Manufacturing
Dongshi Zhang, Bikas Ranjan, Takuo Tanaka, Koji Sugioka
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2020)