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
Chemistry, Physical
Yaoyao Liu, Yuxuan Wang, Ming Yang, Qiang Wu, Zhixuan Li, Chunling Zhang, Jianmin Zhang, Jianghong Yao, Jingjun Xu
Summary: This study successfully fabricated 102-nm-period deep-subwavelength ripples on the ZnO surface using metal-film-assisted femtosecond laser processing, reducing the period of the ripples and decreasing the damage threshold by changing the material surface structure.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yahui Su, Liang Chen, Yunlong Jiao, Juan Zhang, Chuanzong Li, Yiyuan Zhang, Yachao Zhang
Summary: The hierarchical hydrophilic/hydrophobic/bumpy Janus (HHHBJ) membrane, inspired by the desert beetle and cactus thorn, achieves self-driven fog collection and significantly enhances water collection efficiency. The innovative design allows for continuous efficient fog condensation on the top surface and timely droplet removal on the bottom surface, providing insights for the construction of highly efficient fog collection systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Sree Satya Bharati Moram, Chandu Byram, Venugopal Rao Soma
Summary: We have developed a simple and cost-effective SERS substrate for the trace detection of pesticide and dye molecules. Surface patterns on Si substrates were fabricated using femtosecond laser ablation, and chemically synthesized Au nanostars were embedded to enhance the SERS performance. The as-prepared substrates allowed us to detect a minimum concentration of 0.1 ppm for thiram, 1 ppm for thiabendazole, 1.6 ppb for methylene blue, and 1.8 ppb for Nile blue.
Article
Chemistry, Multidisciplinary
Mohammadrahim Kazemzadeh, Miguel Martinez-Calderon, Song Y. Paek, MoiMoi Lowe, Claude Aguergaray, Weiliang Xu, Lawrence W. Chamley, Neil G. R. Broderick, Colin L. Hisey
Summary: Placental extracellular vesicles (EVs) play important roles in pregnancy, but they are also implicated in the progression of preeclampsia. A fabrication process called laser-induced nano-structuring of SERS-active thin films (LINST) was developed to produce substrates that allow the biochemical fingerprinting of EVs. The findings encourage the exploration of surface-enhanced Raman spectroscopy (SERS) of EVs as a promising method for preeclampsia liquid biopsies.
Article
Materials Science, Multidisciplinary
R. Kuladeep, L. Jyothi, Chakradhar Sahoo, D. Narayana Rao, V Saikiran
Summary: This study presents a detailed analysis of the effects of ultrashort laser pulse irradiation on the surface of single crystalline silicon. The formation of laser-induced periodic sub-wavelength surface structures and silicon nanoparticles was observed under different laser parameters. The results also showed that the morphology and periodicity of the sub-wavelength surface structures strongly depend on the laser fluence and pulse number, while the amount of oxygen incorporated into silicon is influenced by laser parameters such as fluence and pulse number.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Physics, Multidisciplinary
Xinbin Zhang, Yazhou Cheng, Yongcheng Zhang
Summary: Ridge waveguides in zinc sulfide (ZnS) crystal were fabricated using femtosecond laser ablation combined with Kr8+ ion irradiation. The transmission performance of the waveguide was improved by reducing color centers and point defects through thermal annealing, resulting in significantly reduced propagation loss in TE mode. Raman spectroscopy confirmed that Kr8+ ion irradiation did not cause significant lattice damage to ZnS crystal.
FRONTIERS IN PHYSICS
(2021)
Article
Optics
Jukun Liu, Ziyao Qin, Min Lu, Jiaqi Ju, Kaiqiang Cao, Long Chen, Ke Cheng, Yanyan Huo
Summary: The dynamics of the formation of periodic ripples induced by two femtosecond laser pulses on an Al film were studied. The first pulse only induced random nanostructures, while the second pulse resulted in the appearance of periodic ripples near these nanostructures. The formation mechanism was explained using a surface-plasmon-polariton model and a Drude-Lorentz model, and the results were validated through simulations.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
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)
Article
Nanoscience & Nanotechnology
S. Katsiaounis, N. Chourdakis, E. Michail, M. Fakis, I Polyzos, J. Parthenios, K. Papagelis
Summary: In this work, we introduce an experimental protocol to engineer nanometer scale pores in CVD graphene membranes under ambient conditions, using low power ultra-short laser pulses and overcoming the drawbacks of other perforation techniques. We visualized and quantified the nanopore network using Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM), while Raman spectroscopy is utilized to correlate the nano-perforated area with the nanotopographic imaging. Our results suggest that Raman imaging provides the identification of nanoporous area and, in combination with AFM, we provide solid evidence for the reproducibility of the method, as nanopores of a certain size distribution are formed under these experimental conditions.
Article
Chemistry, Multidisciplinary
Matteo Mastellone, Alessandro Bellucci, Marco Girolami, Valerio Serpente, Riccardo Polini, Stefano Orlando, Antonio Santagata, Elisa Sani, Frank Hitzel, Daniele M. Trucchi
Summary: This study demonstrates, for the first time, the achievement of two-dimensional laser-induced periodic surface structures with deep-subwavelength periodicity on diamond surfaces. The method involves using two temporally delayed and cross-polarized femtosecond-laser pulses to achieve distinctive nanotexturing, which can be controlled by varying the number of pulses. The effective treatment of large areas of diamond surfaces under scanning mode leads to significantly enhanced absorptance in the visible range, paving the way for the development of metasurfaces for future diamond-based optoelectronic devices.
Article
Optics
Yang Liu, Ji Huang, Bin Yin, Yunxia Ye, Misheng Liang, Xiaozhe Chen, Feifei Wang, Jingjing Zhang, Zijie Dai
Summary: We present a femtosecond laser print-assisted dry etching technology for fabricating micro-convex surfaces (MCS) on hard and brittle materials. The technique involves transferring liquid ultraviolet curing adhesive from a donor substrate to a receiving substrate using femtosecond laser-induced forward transfer, followed by UV curing and dry etching. The effects of laser parameters and substrate surface free energy on MCS morphology were investigated, and it was found that the morphology could be controlled independently or jointly by regulating the diameter and height.
Article
Chemistry, Physical
D. Pavlov, A. Porfirev, S. Khonina, L. Pan, S. I. Kudryashov, A. A. Kuchmizhak
Summary: By combining shaping and multiplexing of the laser beam, ultrafast femtosecond-laser patterning of Au films with coaxial and circular hole arrays at a printing rate of 10(6) elements per second was achieved. The parallel laser-printing method developed in this study is capable of replicating coaxial hole arrays with a resonant transmission over 90% in the mid-IR spectral range resulting from the coupling between localized electromagnetic mode supported by coaxial unit cell and the lattice-type SPPs.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Haoran Wang, Fan Zhang, Kai Yin, Ji 'an Duan
Summary: In this study, a femtosecond laser micro-machining technique was used to fabricate biomimic nanostructures on optical glass, inspired by the high transparency of cicada wings, to improve the transmittance of optical devices. The mechanism for the enhancement of transmittance and the design of the artificial structure were explored using a rigorous coupled-wave analysis method. The height, diameter, and period of the nanostructures could be adjusted by controlling the laser-processing parameters, resulting in wide-angle omnidirectional antireflection in the visible band and hydrophobicity properties. These bioinspired nanostructures are expected to be widely used in glass display applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
