Article
Crystallography
Tao Wang, Yinzhou Yan, Liye Zhu, Qian Li, Jing He, Xiaoxia Zhang, Xi Li, Xiaohua Zhang, Yongman Pan, Yue Wang
Summary: This study presents a new method for fabricating high-performance silver nanowire electrodes on flexible substrates. By utilizing nanosecond pulsed laser for nano-welding, the fabricated transparent electrodes exhibit high transmittance, low sheet resistance, high flexibility, and strong durability.
Article
Chemistry, Multidisciplinary
Kaichen Xu, Qi'ao Li, Yuyao Lu, Huayu Luo, Yihui Jian, Dingwei Li, Depeng Kong, Ruohan Wang, Jibing Tan, Zimo Cai, Geng Yang, Bowen Zhu, Qingqing Ye, Huayong Yang, Tiefeng Li
Summary: A calorimetric thermal flow sensor based on laser direct writing and laser-induced graphene has been proposed in this paper, which can monitor both flow intensities and orientations. The sensor exhibits high sensitivity and an extended flow detection range. Integrating the sensor with a data-acquisition board and a dual-mode graphical user interface enables wireless and dynamic monitoring of respiration and the motion of robotic arms.
Article
Multidisciplinary Sciences
Morgan A. Brown, Kara M. Zappitelli, Loveprit Singh, Rachel C. Yuan, Melissa Bemrose, Valerie Brogden, David J. Miller, Matthew C. Smear, Stuart F. Cogan, Timothy J. Gardner
Summary: This report describes the integration of a 3D microelectrode array on a thin-film flexible cable for neural recording. The fabrication process combines traditional thin-film processing techniques and direct laser writing of 3D structures at micron resolution via two-photon lithography. The report provides a method for producing high-aspect-ratio structures.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Yong Lin, Lin Wang, Tao Ma, Likang Ding, Shitai Cao, Gaohua Hu, Jiaxue Zhang, Xiaohui Ma, Yuping Sun, Qian Wang, Desheng Kong
Summary: This study reports a simple coating process to create Ag NW nanocomposites on various flexible/stretchable substrates, which exhibit excellent conductivity and high deformability. The patterned features of conductive nanocomposites can be conveniently accessed using shadow masks or selective laser ablation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Shuyue Wang, Xiaoli Wu, Jiaxin Lu, Zhengwu Luo, Hui Xie, Xiaobin Zhang, Kaiwen Lin, Yuehui Wang
Summary: This study proposes a high concentration silver nanowires (AgNWs) conductive ink for inkjet printing, which enables the fabrication of flexible transparent conductive electrodes with low resistance and high transparency. The relationship between the printing layer and the conductivity, as well as the stability and thermal response of the electrode, are investigated. The results demonstrate the potential of inkjet-printed AgNWs-based flexible transparent conductive electrodes for developing flexible functional electronics.
Article
Biochemistry & Molecular Biology
Yuehui Wang, Xiaoli Wu, Ke Wang, Kaiwen Lin, Hui Xie, Xiaobing Zhang, Jingze Li
Summary: By investigating the factors influencing silver nanowire inkjet printing and fabricating flexible transparent conductive films on PET substrates, it was demonstrated that well-defined patterns with good photoelectric properties can be obtained.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Xiaoli Wu, Shuyue Wang, Zhengwu Luo, Jiaxin Lu, Kaiwen Lin, Hui Xie, Yuehui Wang, Jing-Ze Li
Summary: This study discusses the relationship between the formulation of AgNWs ink and surface tension, viscosity, contact angle, and film-forming properties. Furthermore, it analyzes the effects of printed layers and ink concentration of AgNWs on microstructures, photoelectric properties, accuracy of printed patterns, and sheet resistance during bending cycles.
Article
Materials Science, Multidisciplinary
Chang Liang, Xiaoyan Sun, Wenming Su, Youwang Hu, Ji'an Duan
Summary: An efficient and rapid method using spatial light modulated femtosecond laser for welding silver nanowires (AgNWs) is proposed in this study, which can significantly improve the welding efficiency and reduce the sheet resistance of AgNWs films without substrate damage. The welded AgNWs films demonstrate excellent electrical conductivity even after 10,000 bending cycles, showing promising prospects in the field of flexible transparent electrodes.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Engineering, Environmental
Rui Cheng, Jinsong Zeng, Bin Wang, Jinpeng Li, Zheng Cheng, Jun Xu, Wenhua Gao, Kefu Chen
Summary: A wearable strain sensor with superior performance was prepared using a novel method, demonstrating high sensitivity, fast response time, and durability, suitable for wearable devices and other applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
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
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
Nanoscience & Nanotechnology
Fan Ye, Mike Pivnenko, Huiyu Huang, Xin Chang, Lee Robinson, Youdou Zheng, Yi Shi, Daping Chu
Summary: We introduce two types of dielectric metasurfaces consisting of 3 x 3 regions that can manipulate wavefront by different feature heights. Both polarization-dependent and polarization-independent metasurfaces are achieved for phase depth of 0 to 2 pi at 1550 nm, with considerable average transmittance of 80.1% and 85.1% respectively. By carefully designing nanofeature sizes, the phase modulation capability can be extended over a broadband range of 1460.1-1618.0 nm for optical communications. Moreover, the entire metasurfaces with nanofeatures of varying heights can be fabricated in a single process using direct laser writing with high precision, which is advantageous for mass production and the development of efficient and ultracompact devices.
Article
Optics
Jianing Liao, Wei Guo, Peng Peng
Summary: A simple low-temperature method for preparing highly conductive and electrochemically active copper-graphene composites has been proposed, which can be applied in the field of flexible electronics with the advantages of rapid and low cost.
OPTICS AND LASERS IN ENGINEERING
(2021)
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
Chemistry, Physical
Gui-Cang He, Li-Na Shi, Yi-Lei Hua, Xiao-Li Zhu
Summary: This work investigates the electron-phonon, phonon-phonon, and phonon structure scattering mechanisms and their impact on the thermal and thermoelectric properties of a silver nanowire (AgNW). The study reveals that the electron-phonon scattering rate decreases with increasing temperature, while the phonon-phonon scattering rate increases and surpasses the electron-phonon scattering rate above the Debye temperature. The rate of phonon structure scattering remains constant. The thermal conductivity of the AgNW exhibits an opposite trend to the total phonon scattering rate with temperature. The thermoelectric properties of the AgNW are heavily influenced by the thermal conductivity, and the figure of merit (ZT) of the AgNW is found to be significantly higher than that of bulk silver at room temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Hong-Zhon Cao, Liang-Chen Cao, Gan Fang, Yuan-Yuan Zhaoc, Guo-Juan Xud, Zhong-Yun Chen, Xuan-Ming Duanc
Summary: This research utilized laser trapping of gold nanoparticles in an aqueous solution to fabricate gold micro/nanostructures, achieving a high spatial resolution. A new additive and subtractive hybrid manufacturing technology was proposed and realized to improve the spatial resolution of the fabricated structures. The technology has great application prospects in the fabrication of high spatial resolution nanostructures, with a gold microring of line width 37 nm successfully fabricated through precise control of fabrication parameters.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Feng Jin, Jie Liu, Yuan-Yuan Zhao, Xian-Zi Dong, Mei-Ling Zheng, Xuan-Ming Duan
Summary: In this study, the high-resolution fabrication of hydrogen silsesquioxane (HSQ) using femtosecond laser direct writing (FsLDW) was demonstrated. A feature size of 26 nm in HSQ was achieved using a 780 nm femtosecond laser. The HSQ microstructures fabricated by FsLDW showed nanoscale resolution, smooth surface, and high thermal stability, indicating potential application in the fabrication of micro-nano devices.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Jian-Yu Wang, Feng Jin, Xian-Zi Dong, Jie Liu, Mei-Ling Zheng
Summary: Inspired by the intelligent response of flytrap, a smart hydrogel microactuator based on a bionic asymmetric structure is demonstrated. The grasping and releasing behavior of the microactuator for micro-objects can be realized and tuned by using pH-triggered shape changes, demonstrating its potential for applications, such as flexible robotics, smart sensors, and microscopic manipulation.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Deming Hu, Tong Liu, Qiaochu Yang, Zhiyuan Xu, Junqiu Long, Yang Ran, Xuan-Ming Duan, Bai-Ou Guan
Summary: This paper presents a microfiber Bragg grating device that utilizes optical fiber and plasmonic gold nanostar (AuNSt) for photothermal actuation. The device demonstrates self photothermal modulation, high temperature elevation, and improved sensitivity. It holds potential for bio-chemical sensing and medical therapeutics.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Physics, Applied
Xiaodi Zhang, Jundong Chen, Weihua Han, Yandong Ge, Yangyan Guo, Xianzi Dong, Xuanming Duan, Meiling Zheng, Fuhua Yang
Summary: This article introduces the study of using arrays of dopant-induced quantum dots as quantum bit platforms. A junctionless silicon nanowire transistor with dual physical channels with a diameter of 10 nm was fabricated using novel femtosecond laser projection exposure together with thermal oxidation. Quantum transport spectroscopy was conducted to demonstrate the evolution of the quantum transport process.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Optics
Tian-Wei Wang, Xian-Zi Dong, Feng Jin, Yuan-Yuan Zhao, Xiang-Yang Liu, Mei-Ling Zheng, Xuan-Ming Duan
Summary: This study investigates the precise modulation of gap width in maskless lithography using a digital micromirror device (DMD). The relationship between structure morphology and light intensity distribution is analyzed, and the gap width is optimized by modulating exposure energy. The aperture diameter of the objective lens is found to have a substantial effect on pattern consistency. The study also proposes an alternative method for achieving fine gap structures through structural decomposition design and precise control of exposure energy. This research provides a promising protocol for fabricating controllable gap microstructures using maskless lithography.
Article
Chemistry, Multidisciplinary
Rong-Rong Wang, Mei-Ling Zheng, Wei-Cai Zhang, Jie Liu, Teng Li, Xian-Zi Dong, Feng Jin
Summary: With the development of device miniaturization, there is a demand for a flexible and fast method to prepare microstructures with desired patterns. In this study, a novel photoreduction-polymerization method is developed for preparing conductive metal-polymer patterns. Ag/polyaniline nanocomposites are synthesized using maskless optical projection lithography technology, which demonstrates the surface-enhanced Raman scattering effect on the microstructures. This preparation method opens up new avenues for the fabrication of micro-nano devices such as sensors and detectors.
Article
Optics
Gui-Cang He, Kang-Wei Zhang, Li-Na Shi
Summary: This study investigates the fundamental correction effect of self-absorption (SA) on the measurement of element concentration in laser-induced plasmas (LIPs). Soil LIPs spectra are measured using a typical experimental setup, and the SA coefficient (SA lambda) of a spectral line is directly obtained through fitting the Voigt function. The results show that considering SA correction leads to element concentrations in soil that are closer to those obtained by chemical methods.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jing-Tao Chen, Yuan-Yuan Zhao, Yang Zhang, Jian-Xin Zhu, Xuan-Ming Duan
Summary: This paper introduces a label-free neural network-based inverse lithography technology (LF-NNILT) that improves the performance and extrapolation ability of mask optimization without relying on labels. LF-NNILT significantly enhances the printability of target layouts and the manufacturability of synthesized masks compared to traditional ILT. Moreover, LF-NNILT achieves a much faster optimization speed and is simpler to implement, supporting the development of advanced lithography.
Article
Physics, Applied
Xiang-Yang Liu, Xian-Zi Dong, Min Guo, Feng Jin, Tian-Wei Wang, Xuan-Ming Duan, Zhen-Sheng Zhao, Mei-Ling Zheng
Summary: We propose a strategy to achieve narrow gaps in micro-nano structures using the femtosecond laser maskless optical projection lithography (MOPL) technique. Simulation predicts the trend of factors affecting the gap width, in agreement with experimental results. A narrow gap of 243 nm is obtained by optimizing the structure design and processing parameters. Furthermore, large-area functional micro-nano structures with narrow gaps are successfully fabricated. The strategy of optimizing gap width in MOPL is flexible and effective, providing wide application prospects in nanophotonics and semiconductor micro-nano device fabrication.
APPLIED PHYSICS EXPRESS
(2023)
Article
Optics
Duo Miao, Yuan-Yuan Zhao, Shun-Cheng Cai, Zhi-Xiang Li, Jing-Tao Chen, Jia-Ning An, Xuan-Ming Duan
Summary: This study proposes a new hybrid Dammann grating structure that can effectively generate an engineering-grade M2 x N2 spot array with a simple structural design. The hybrid Dammann grating exhibits high efficiency and low non-uniformity at a wavelength of 532 nm and can be fabricated through maskless projection lithography for large-scale, low-cost production.
Article
Chemistry, Physical
Chun Du, Ziyi Yang, Anzhen Mo, Xuanming Duan, Guowei Yang
Summary: In order to improve the performance of solar energy-driven water generation, optimization strategies such as alloying and combination of plasmonic and defect modulation are required for two-dimensional (2D) photothermal materials. However, the complex preparation process and insufficient solar spectrum absorption pose challenges in practical utilization. This study proposes a self-enhancing photothermal performance strategy induced by topological surface states (TSSs). By fabricating 2D WTe2 on mixed cellulose ester (MCE), a photothermal device with WTe2 @MCE exhibits an excellent photothermal evaporation rate, 1.09 kg·m(-2)·h(-1), which is 6.1 and 3.1 times higher than MCE and pure water, respectively. This improvement can be attributed to the characteristics of 2D Weyl semimetal WTe2 with TSSs, including high optical absorption capacity, low thermal diffusivity, specific heat capacity, and high carrier density, which are supported by experiments and calculations. The contribution of TSSs to the enhancement of optical absorption for efficient solar water generation is revealed through comparative experiments. Furthermore, the photothermal conversion mechanism is explored, revealing that the photoexcited electrons recombine with the holes through nonradiative mode, releasing thermal energy through phonon emission via multiple pathways. This work promotes the application of Weyl semimetal material with TSSs in solar water evaporation.
