Article
Optics
Ke Sun, Xinkuo Li, Dezhi Tan, Haiyi Jiang, Kaiyi Xiong, Jie Zhang, Beibei Xu, Zhu Xiao, Zhou Li, Jianrong Qiu
Summary: The study reports the fabrication of pure blue emissive perovskite nanocrystals (PNCs) in glass using ultrafast laser. By engineering the chemical composition in the B-site Cd/Pb mix-cation system, the emission wavelength can be tuned in the range from 461 to 520 nm. The photoluminescence (PL) quantum yield (QY) of CsCdxPb1-xBr3 PNCs reaches 13.4% for the pure blue emission at 467 nm, which is twice that of CsPbBryCl3-y PNCs. The pure blue emissive PNCs demonstrate excellent stability when exposed to UV radiation, heat, and ethanol solvents, showing great potential for information security applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yuhao Lei, Huijun Wang, Linards Skuja, Bodo Kuehn, Bernhard Franz, Yuri Svirko, Peter. G. Kazansky
Summary: It is demonstrated that the ultrafast laser writing in silica glass depends on the grade of silica glass associated with the method of its manufacture. The laser-written modifications, especially birefringent modifications, reveal a dependence on the geometry of writing. The retardance of the scanned birefringent region produced in the regime of anisotropic nanopores formation is about five times higher in a sample manufactured by vapor axial deposition (VAD) than in an electrically fused sample.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Ceramics
Shih-Feng Tseng, Chia-Ho Liao, Wen-Tse Hsiao, Tien-Li Chang
Summary: This study developed screen-printed graphene-based strain sensors for detecting glass deformation using ultrafast laser direct writing. By optimizing laser fabrication parameters, the strain sensor with a 6-mm grid length showed a higher gauge factor compared to sensors with 8 and 10-mm grid lengths.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Goezden Torun, Anupama Yadav, Kathleen A. Richardson, Yves Bellouard
Summary: This study investigates the formation of regular patterns in chalcogenide glass using self-organization processes during femtosecond laser exposure. The formation of nanostructures correlated to the glass network structural evolution is analyzed using Raman spectroscopy and microscopy analysis.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Ceramics
Heng Yao, Rayan Zaiter, Maxime Cavillon, Benjamin Sapaly, Florian Calzavara, Pierre Delullier, Thierry Cardinal, Ye Dai, Bertrand Poumellec, Matthieu Lancry
Summary: Barium germano-gallate glasses are promising for photonic applications in the mid-infrared region, with significant refractive index changes observed under femtosecond laser. The composition of the glass plays a role in determining the refractive index changes, providing ways to design glasses with high refractive index contrast.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Stoffel D. Janssens, David Vazquez-Cortes, Burhannudin Sutisna, Eliot Fried
Summary: This novel approach presents a method for creating durable nanochannels by using a femtosecond laser to directly write optically accessible nanochannels. The dimensions of these nanochannels can be tuned by adjusting the laser pulse energy. The mechanism of nanostrip formation and the patterning of the film through laser writing are also investigated. The applicability of the laser-written nanochannels is demonstrated by fabricating a nanofluidic device that fills with water via capillary action.
Article
Optics
Jiafeng Lu, Enrique Garcia-Caurel, Razvigor Ossikovski, Francois Courvoisier, Xianglong Zeng, Bertrand Poumellec, Matthieu Lancry
Summary: Chirality transfer from femtosecond laser direct writing in achiral transparent materials is caused by the interplay between anisotropic nanogratings and mechanical stress with non-parallel and non-perpendicular neutral axes. However, laser fabrication also induces significant linear birefringence. To precisely manipulate circular polarization properties and minimize linear birefringence, we propose a geometry-inspired multilayer method for direct writing of chiral waveplates. Theoretical analysis shows that our method achieves strong circular birefringence and provides a facile platform for chiral device exploration with minimal linear property existence.
Editorial Material
Optics
Xiujian Li, Wenke Xie
Summary: Appropriate polarization utilization improves light-matter interactions, leading to increased efficiency in ultrafast laser writing, reduced pulse energy, and increased processing speed for high density optical data storage. It also enables the manufacturing of three-dimensional integrated optics and geometric phase optical elements.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Optics
K. B. Ng, W. Y. Chong, C. S. Lim, H. Ahmad
Summary: In this work, the use of femtosecond laser direct writing and two-photon polymerization technique for fabricating single-mode optical waveguides in SU-8 photoresist was demonstrated. By optimizing the waveguide width and other parameters, waveguides with low insertion and propagation losses were successfully fabricated, and the feasibility of fabricating complex waveguide structures was also demonstrated.
Article
Chemistry, Multidisciplinary
Bolun Wang, Ruixuan Peng, Xuewen Wang, Yueyang Yang, Enze Wang, Zeqin Xin, Yufei Sun, Chenyu Li, Yonghuang Wu, Jinquan Wei, Jingbo Sun, Kai Liu
Summary: A novel ultrafast method is introduced to synthesize and pattern VO2 in seconds under ambient conditions through laser direct writing on a V5S8 canvas, overcoming the limitations of traditional synthesis that requires minutes or hours of global heating and low oxygen partial pressure. This approach enables fast and efficient integration of VO2-based heterojunction devices and can be applied to other intriguing intermediate phases of oxides.
Article
Chemistry, Multidisciplinary
Jin Xu, Ruoxing Wang, Haoqing Jiang, Xingtao Liu, Licong An, Shengyu Jin, Biwei Deng, Wenzhuo Wu, Gary J. Cheng
Summary: In this study, ultrafast laser direct writing was combined with an external magnetic field for the first time to achieve mass production of 3D hybrid materials with unique functions. Metal-organic framework crystals were used as precursors to support graphene-coated ultrafine cobalt nanoparticles on 3D porous carbon. The study demonstrated significant improvements in electrochemical water-splitting tests due to the alignment of nanoparticles and controlled elemental compositions induced by the magnetic field.
Article
Materials Science, Multidisciplinary
Alexey S. Lipatiev, Georgiy Yu Shakhgildyan, Maxim P. Vetchinnikov, Hojeong Lee, Jong Heo, Sergey Lotarev, Vladimir N. Sigaev
Summary: In this study, the structure of microdomains containing CdS nanoparticles in glass written by laser was examined using transmission electron microscopy. CdS nanocrystals had a size distribution with multiple peaks, with quantum dots of minimal size near the edges. The CdS nanocrystals showed a significant increase in size from the periphery to the center of the laser-written microdomain, with potential applications in advanced optical data encoding and security tagging.
Article
Optics
Xiaoli Sun, Shuo Sun, Carolina Romero, Javier R. Vazquez de Aldana, Fengqin Liu, Yuechen Jia, Feng Chen
Summary: A low-loss depressed cladding waveguide architecture was designed and fabricated in neodymium-doped yttrium aluminum garnet crystal, with ear-like waveguide structures formed by femtosecond laser writing. These structures showed more symmetric mode profiles and lower losses, leading to efficient waveguide lasers in both continuous wave and pulsed regimes, as well as a passively fundamentally Q-switched laser with narrow pulse width and high repetition rate.
Article
Materials Science, Multidisciplinary
Valerio Levati, Davide Girardi, Nicola Pellizzi, Matteo Panzeri, Matteo Vitali, Daniela Petti, Edoardo Albisetti
Summary: Nanomaterials derive their properties from specific nanostructures, and traditional nanofabrication techniques are often used for device fabrication. This perspective discusses an alternative approach where advanced nanofabrication techniques are used to directly nanostructure condensed matter systems after growth, inducing controlled changes in properties. The advantages, limitations, applications, and future perspectives of this approach are highlighted.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Ceramics
Yi-lun Wang, Shuang-shuang Li, Bao-jia Li, Yao Zhang, Li-jing Huang, Nai-fei Ren
Summary: Ultrafast laser direct writing was used to prepare Ag mesh transparent conductive films (TCFs) on commercial FTO/Glass substrate to enhance its overall photoelectric performances. Optimal parameters for fabricating the TCFs were found to be a laser scanning speed of 2200 mm/s, a laser fluence of 0.050 J/cm(2), and an Ag mesh height of 2500 nm. The resulting transparent heater showed improved heating performance compared to the FTO heater, indicating significant enhancement of the FTO/Glass substrate's photoelectric properties.
CERAMICS INTERNATIONAL
(2021)
Article
Biotechnology & Applied Microbiology
Jing Huang, Miao-Ting Li, An-Qi Shen, Xia Wan, Xu-Qing Liu, Yu-Zhen Li, Qiong-Qiong Yang, Bo -Bo Zhang
Summary: This study investigates the underlying mechanisms of linolenic acid in promoting triterpenoids production. The results show that linolenic acid can alter cell membrane composition, permeability, and morphology, leading to increased production of triterpenoids.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Xiaobin Gu, Kaijun Dong, Lihua Peng, Liang Bian, Qin Sun, Weimin Luo, Bobo Zhang
Summary: Due to the intermittent nature of solar energy, the water generation yield of interfacial solar vapor generation during the nighttime is limited. To address this limitation, a phase change material (PCM)-integrated solar vapor generator was proposed. The study explored the use of different types of PCM/EG form-stable PCMs and found that PEG1500/EG had the best performance. A proof-of-concept evaporator showed that the mass change of the FSPCM-integrated solar vapor generator was significantly higher than that of a conventional evaporator. COMSOL simulations indicated that the overall performance of the FSPCM-integrated solar vapor generator could be further improved.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Bingxin Zhang, Ming Gao, Weiqi Tang, Xiaona Wang, Chuanfu Wu, Qunhui Wang
Summary: This study investigated the effects of methanol vapour esterification (MVE) on catalyst activity and reusability. The results showed that MVE achieved a high conversion yield of 98.8%, and the catalyst could be reused up to eight batches with a conversion rate of 83.4%. Compared to liquid methanol esterification (LME), MVE offered a higher turnover frequency and number of catalyst reuses. It also reduced leaching and chemical derivatization of the acidic groups on the catalyst surface, resulting in a lower production cost of methyl oleate.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Materials Science, Biomaterials
Jiahe Wu, Bo Zhang, Nengming Lin, Jianqing Gao
Summary: Biofilm formation contributes to bacteria's resistance to conventional antibiotics. Nanotechnology-based strategies offer feasible ways to interfere with the biofilm life cycle and modulate the bacterial biofilm microenvironment, which could aid in the treatment of bacterial infections. However, there are remaining challenges to overcome in the development of nanotechnology-based strategies.
BIOMATERIALS SCIENCE
(2023)
Article
Automation & Control Systems
Shuping Zhao, Jigang Wu, Bob Zhang, Lunke Fei, Shuyi Li, Pengyang Zhao
Summary: This article proposes a novel adaptive graph embedded preserving projection learning method. By combining sparse graph learning and projection learning, it achieves feature extraction and selection, and has been proven effective and competitive through experiments.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Computer Science, Artificial Intelligence
Ziyuan Yang, Lu Leng, Andrew Beng Jin Teoh, Bob Zhang, Yi Zhang
Summary: This paper investigates cross-database attacks in palmprint recognition systems and reveals the latent correlations among coding-based palmprint templates. It proposes an effective cross-database attack algorithm with a 100% success rate. The research indicates high risks of cross-database attacks and privacy invasion in palmprint recognition systems adopting coding-based representation.
KNOWLEDGE-BASED SYSTEMS
(2023)
Article
Computer Science, Information Systems
Zhihao Hao, Bob Zhang, Dianhui Mao, Jerome Yen, Zhihua Zhao, Min Zuo, Haisheng Li, Cheng-Zhong Xu
Summary: This paper proposes a method of generating contract templates based on LSTM-RNN to simplify the coding process and improve the security of smart contracts by extracting syntax and semantic features for template generation.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Merlin Airik, Haley Arbore, Elizabeth Childs, Amy B. Huynh, Yu Leng Phua, Chi Wei Chen, Katherine Aird, Sivakama Bharathi, Bob Zhang, Peter Conlon, Stanislav Kmoch, Kendrah Kidd, Anthony J. Bleyer, Jerry Vockley, Eric Goetzman, Peter Wipf, Rannar Airik
Summary: Karyomegalic interstitial nephritis (KIN) is a genetic kidney disease caused by recessive mutations in the FAN1 DNA repair enzyme. The disease is characterized by genomic instability and mitotic abnormalities in tubular epithelial cells. Hypersensitivity to endogenous reactive oxygen species (ROS) is identified as a key factor in the pathogenesis of KIN, leading to chronic oxidative and double-strand DNA damage.
Article
Energy & Fuels
Dongji Wu, Xiaobin Gu, Qin Sun, Weimin Luo, Bobo Zhang, Jiangang Peng, Liang Bian, Kaijun Dong
Summary: This study proposed a new method to enhance the thermal conductivity of phase change materials (PCMs) by in situ reduction deposition of copper (Cu) on PCM carriers. The composite phase change materials (CPCMs) prepared using this method showed significantly higher latent heat and thermal conductivity compared to traditional methods of adding thermal conductive particles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Dermatology
Tianyi Wang, Wang You, Linna Zhao, Bingxin Zhang, Hongmei Wang
Summary: This study aims to investigate the mechanism of Lithospermum erythrorhizon Sieb (LES) in the treatment of atopic dermatitis (AD) by combining network pharmacology and signed random walk with restart (SRWR). The results showed that active compounds in LES, such as caffeic acid, Isovaleric acid, Arnebinol, and Alannan, may inhibit key mediators involved in several pathways related to AD. The application of SRWR could help identify potential targets of LES and elucidate the mechanism of action of traditional Chinese medicine.
CLINICAL COSMETIC AND INVESTIGATIONAL DERMATOLOGY
(2023)
Article
Computer Science, Information Systems
Shuping Zhao, Lunke Fei, Jie Wen, Jigang Wu, Bob Zhang
Summary: In the real-world, missing views are a common problem in multiview data. Existing clustering methods often ignore the hidden information of the absent views and fail to reflect the real distribution of the data. To address this issue, this paper proposes a method called ICSL_IMC, which learns the intrinsic and complete structures for all views, effectively capturing the real distribution of the absent instances. The proposed method outperforms state-of-the-art methods on various databases.
IEEE TRANSACTIONS ON MULTIMEDIA
(2023)
Article
Computer Science, Information Systems
Shuyi Li, Bob Zhang, Lunke Fei, Shuping Zhao, Yicong Zhou
Summary: Compared with uni-modal biometrics systems, multimodal biometrics systems using multiple sources of information have received considerable attention recently. However, most traditional multimodal biometrics techniques extract features independently without considering the associations between different modalities. This paper proposes a method to learn sparse and discriminative multimodal feature codes for multimodal finger recognition, which takes into account inter-modality and intra-modality information. Experimental results demonstrate the effectiveness and robustness of the proposed framework.
IEEE TRANSACTIONS ON MULTIMEDIA
(2023)
Article
Computer Science, Artificial Intelligence
Ling Xiao, Beiji Zou, Xiaoyan Kui, Chengzhang Zhu, Wensheng Zhang, Xuebing Yang, Bob Zhang
Summary: Redundancy elimination techniques are investigated to reduce storage overheads for cloud-assisted health systems. A multi-feature-based redundancy elimination scheme, called MFRE, is proposed to utilize the similarity feature and temporal locality feature to assist redundancy elimination. This scheme improves compression ratios and system throughput compared to the state-of-the-art method by 9.68% and 50% respectively.
CAAI TRANSACTIONS ON INTELLIGENCE TECHNOLOGY
(2023)
Article
Optics
Zhuo Wang, Bo Zhang, Dezhi Tan, Jianrong Qiu
Summary: In this study, long-term optical data storage (ODS) technology with an ultralong lifetime of 2x107 years was achieved by using an ultrafast laser pulse to reduce Eu3+ ions and modify the optical properties inside Eu-doped aluminosilicate glasses. The induced modifications in the glass were found to withstand temperatures up to 970 K and strong ultraviolet light irradiation with a power density of 100 kW/cm2. The Eu2+ active ions exhibited strong and broadband emission with a maximum width of 190 nm, and the photoluminescence (PL) could be flexibly tuned throughout the visible region by adjusting the alkaline earth metal ions in the glasses. The developed technology and materials have significant implications for photonic applications such as long-term ODS.
OPTO-ELECTRONIC ADVANCES
(2023)
Article
Computer Science, Artificial Intelligence
Guancheng Wang, Zhihao Hao, Haisheng Li, Bob Zhang
Summary: This study proposes a novel gradient-based neural network model with an activated variable parameter, named AVPGNN model, to solve time-varying constrained quadratic programming (TVCQP) problems. The AVPGNN model avoids matrix inverse, introduces time-derivative of time-varying parameters, and adopts activation function to accelerate convergence rate. The accuracy and convergence rate of the AVPGNN model are analyzed in theory and demonstrated through numerical experiments and application examples.
CAAI TRANSACTIONS ON INTELLIGENCE TECHNOLOGY
(2023)
