Yu Zhou, Zaifu Huang, Yan Chen, Xiaoqian Dong, Fu Fan, Lei Chen, Bo Feng
{"title":"Laser Beam Machining of Janus Porous Electrodes for Long-term Electrophysiological Sensing","authors":"Yu Zhou, Zaifu Huang, Yan Chen, Xiaoqian Dong, Fu Fan, Lei Chen, Bo Feng","doi":"10.1002/admt.202401812","DOIUrl":"https://doi.org/10.1002/admt.202401812","url":null,"abstract":"<p>Flexible epidermal electrodes have attracted significant attention for their ability to conform to irregular surfaces, with comfortable and non-invasive sensing performance. However, challenges remain regarding conformality, breathability, and contact interfacial impedance. This work introduces an ultrathin, trim-paste, and inexpensive Janus porous electrode by laser beam machining. The micron-pore-sized electrodes exhibit exceptional breathability with sweat permeability in less than 1s. In addition, the electrodes exhibit ultrathin profiles, with a thickness of only 23 µm, and an ultralight weight of 0.12 g. Porous electrodes can be trimmed and pasted onto the human skin or objects in a variety of shapes and sizes as required. In particular, the Janus porous kirigami electrodes demonstrate stretchability, with an elongation at break up to 350%. The Janus porous electrodes can be used to detect human electromyography and electrocardiogram signals, showing superior performance compared to commercial gel electrodes, especially in a sweat-rich environment.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huan-Huan Fu, Yu-Long Chen, Bao-Ming Xu, Yao Liu, Wen-Bei Yu, Yu Li, Bao-Lian Su
{"title":"Modulating π − d Conjugated Coordination in Bionic Cu/Cu2O Heterojunctions for Efficient Photodegradation of Organic Contaminants","authors":"Huan-Huan Fu, Yu-Long Chen, Bao-Ming Xu, Yao Liu, Wen-Bei Yu, Yu Li, Bao-Lian Su","doi":"10.1002/admt.202500028","DOIUrl":"https://doi.org/10.1002/admt.202500028","url":null,"abstract":"<p>In situ grown copper (Cu) metal is commonly integrated with Cu<sub>2</sub>O to enhance charge separation and improve photocatalytic degradation of azo dyes, such as Orange II and Methyl orange (MO). However, limited solvent diffusion remains a critical challenge for effective pollutant removal. Inspired by the dandelion structure, this work synthesizes a Cu/Cu<sub>2</sub>O composite with an interconnected nanotube structure and hollow nanosphere, facilitating solvent transport and increasing active surface area. The optimized Cu/Cu<sub>2</sub>O-S3 catalyst achieves 93 % photodegradation efficiency of Orange II and maintains 98 % stability over five cycles at a concentration of 100 mgL<sup>−1</sup>, significantly outperforming MO. While previous studies have attributed this performance to the dihedral angle and planarity of Orange II, the role of photogenerated electron transport at the catalyst-dye interface is largely overlooked. Here, this work reveals that electron transfer from the 3<i>d</i> orbitals of Cu transfer to the 2<i>p</i> energy levels of N, C, O atoms, enhancing carrier mobility and binding interactions. Moreover, the extra α-OH group in Orange II promotes uniform electronic distribution and planar π-bond formation, further improving photocatalytic performance. These insights provide a deeper understanding of photocatalytic mechanisms and offer valuable strategies for designing more efficient catalysts.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reconfigurable Planar Huygens' Metasurface for Wide Beamforming","authors":"Sangmin Lee, Sangjo Choi","doi":"10.1002/admt.202402131","DOIUrl":"https://doi.org/10.1002/admt.202402131","url":null,"abstract":"<p>Huygens' metasurfaces (HMSs), which independently control electric and magnetic dipole responses, have been implemented in planar platforms. However, dynamically controlling both dipole responses to achieve reconfigurability at the sub-wavelength scale remains challenging with conventional planar HMSs. In this work, these challenges are addressed by introducing the first planar, reconfigurable HMS design that integrates varactors and embedded bias lines, allowing for precise and independent control of electric and magnetic surface impedances at the sub-wavelength scale (<i>λ<sub>0</sub></i>/9.4 × <i>λ<sub>0</sub></i>/6.3 × <i>λ<sub>0</sub></i>/22.7) at 5.5 GHz. A large-aperture HMS (4.47<i>λ<sub>0</sub></i> × 4.47<i>λ<sub>0</sub></i>), integrated with 3,528 varactors and fed by a 4 × 4 patch array at a focal-length-to-diameter ratio of 1.6, demonstrates wide beamforming angles ranging from −70° to +70° with an aperture efficiency of 21.09%. This innovative design offers a promising solution for efficient and compact reconfigurable intelligent surfaces, paving the way for advanced wave control in next-generation wireless communication and sensing applications</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Heidi Tuorila, Jukka Viheriälä, Yeasir Arafat, Joonas Hilska, Fatih Bilge Atar, Fatima Gunning, Brian Corbett, Mircea Guina
{"title":"Micro-Transfer Printing of GaSb Optoelectronics Chips for Mid-Infrared Silicon Photonics Integrated Circuits","authors":"Heidi Tuorila, Jukka Viheriälä, Yeasir Arafat, Joonas Hilska, Fatih Bilge Atar, Fatima Gunning, Brian Corbett, Mircea Guina","doi":"10.1002/admt.202401791","DOIUrl":"https://doi.org/10.1002/admt.202401791","url":null,"abstract":"<p>3D integration of GaSb-based gain chips on a silicon photonics platform using micro-transfer printing is demonstrated for the first time. The release process of GaSb coupons and their transfer for the demonstration of hybrid GaSb/Silicon-photonics on-chip external cavity lasers is reported. A methodology to evaluate the key features of the gain chip coupons, namely the quality of the etched facets and the facet coating deposited using a wafer-level process, is introduced. The characterization provides insight into the fabrication factors limiting the performance of the gain coupons. The level of performance achieved for the transfer printing process offers a solid landmark for the development of photonics integration technology operating at the 2–3 µm wavelength range. This is instrumental for the deployment of mid-infrared photonic integration technology in emerging applications related to gas and biomarker sensing.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 10","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zikang Yu, Yun Mou, Yang Peng, Daqin Chen, Mingxiang Chen
{"title":"Toward High-Brightness Laser Lighting: Progress and Perspectives on Phosphor-in-Glass Films","authors":"Zikang Yu, Yun Mou, Yang Peng, Daqin Chen, Mingxiang Chen","doi":"10.1002/admt.202402050","DOIUrl":"https://doi.org/10.1002/admt.202402050","url":null,"abstract":"<p>Laser lighting is considered as a next-generation solid-state lighting (SSL) source due to its advantages of high-power density and brightness, high collimation, long irradiation distance, and free of “efficiency droop.” Laser-excited phosphor, in which blue laser diodes (LDs) excite a yellow phosphor converter, is a common method to realize white laser lighting. As a novel all-inorganic phosphor converter material with easy preparation, low cost, adjustable luminescent property, and ability to combine with high heat-conducting substrate, the phosphor-in-glass film (PiGF) attracts a lot of attention. In this perspective, the state-of-art research data on PiGFs are summarized, and the preparation and constitution of PiGF are introduced. The topics about how to improve the luminescence saturation threshold (ST), light extraction, color uniformity, and color rendering in laser lighting are discussed. Correspondingly, the applications in laser lighting and display, biomedical devices, and visible light communications are outlined. Moreover, the prospects of future directions about PiGFs in laser-driven lighting are indicated. This work will promote the study on high-performance PiGFs in laser lighting and its applications.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yi An, Jiaming Liu, Jiayong Yan, Hongyu Feng, Ruichen Zhou, Daming Wu, Jing Yang, Tao Liu, Jingyao Sun
{"title":"A Simple and Efficient Preparation Method for Flexible Pressure Sensors Using Salt Template and Vacuum Infiltration","authors":"Yi An, Jiaming Liu, Jiayong Yan, Hongyu Feng, Ruichen Zhou, Daming Wu, Jing Yang, Tao Liu, Jingyao Sun","doi":"10.1002/admt.202500013","DOIUrl":"https://doi.org/10.1002/admt.202500013","url":null,"abstract":"<p>Flexible pressure sensor has a wide range of applications in physiological signal monitoring. Besides, flexible pressure sensors with good properties like high sensitivity, flexibility, and excellent stability have become a key direction for the research. In this paper, micro-structured sponges (polydimethylsiloxane/carbon nanotube (PDMS/CNT)) is prepared using a salt template, followed by the application of vacuum infiltration to introduce graphene nanoparticles (GNPs) into the sponge skeleton. Surface microstructures are further created using sandpaper to enhance sensitivity. The prepared flexible sensor not only achieves a high gauge factor (GF = 17.14) and extremely low detection limits (4.5 mN) but also exhibits exceptional stability (over 3500 pressure cycles at 5% strain, the periodic signals do not decay or show significant differences). In addition, the sensor exhibits a feature of fast response (80 ms). The proposed method features low cost and simple production processes, showcasing significant promise and extensive application potential in intelligent healthcare across diverse areas.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yongkuan Wu, Haolong Li, Jinsong Leng, Zhichun Zhang, Yanju Liu
{"title":"Preparation of Ultra-Lightweight Buckypaper-Ni-Cu High-Performance Electromagnetic Shielding Films by Chemical-Electroplating Modified Method","authors":"Yongkuan Wu, Haolong Li, Jinsong Leng, Zhichun Zhang, Yanju Liu","doi":"10.1002/admt.202401998","DOIUrl":"https://doi.org/10.1002/admt.202401998","url":null,"abstract":"<p>This study successfully fabricates an ultra-lightweight buckypaper(BP)-Ni-Cu layered structure film using vacuum filtration and chemical-electroplating methods, achieving a thickness of 34 µm and a surface density of 50 g m<sup>−</sup><sup>2</sup>. The film exhibits a notably low surface square resistance of 9.5 mΩ □<sup>−1</sup>. Regarding electromagnetic shielding performance, it exhibits exceptional effectiveness across multiple frequency bands: 96.67 dB in the Partial S-band (2.6–4 GHz), 65.05 dB in the C1 band (4–6 GHz), 64.23 dB in the C2 band (6–8 GHz), 87.04 dB in the X band (8–12 GHz), and 90.46 dB in the Ku band (12–18 GHz). In terms of mechanical properties, compared with the tensile fracture strength of 33.67 MPa of the BP film, the tensile fracture strength of the BP-Ni film is enhanced to 51.9 MPa, and that of the BP-Ni-Cu film is elevated to 49.43 MPa. Additionally, the film demonstrates good thermal stability at temperatures up to 300<sup> °</sup>C. It also exhibits favorable electrical conductivity. Overall, considering its excellent characteristics, including multi-band shielding and ultra-lightweight properties, this film presents a novel and highly promising solution for aerospace electromagnetic shielding applications.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luksa Kujovic, Xiaolei Liu, Mustafa Togay, Ali Abbas, Adam M. Law, Luke O. Jones, Kieran M. Curson, Kurt L. Barth, Jake W. Bowers, John M. Walls, Ochai Oklobia, Dan A. Lamb, Stuart J. C. Irvine, Wei Zhang, Chungho Lee, Timothy Nagle, Dingyuan Lu, Gang Xiong
{"title":"Development of ZnO Buffer Layers for As-Doped CdSeTe/CdTe Solar Cells with Efficiency Exceeding 20%","authors":"Luksa Kujovic, Xiaolei Liu, Mustafa Togay, Ali Abbas, Adam M. Law, Luke O. Jones, Kieran M. Curson, Kurt L. Barth, Jake W. Bowers, John M. Walls, Ochai Oklobia, Dan A. Lamb, Stuart J. C. Irvine, Wei Zhang, Chungho Lee, Timothy Nagle, Dingyuan Lu, Gang Xiong","doi":"10.1002/admt.202401364","DOIUrl":"https://doi.org/10.1002/admt.202401364","url":null,"abstract":"<p>The front buffer layer plays an important role in CdSeTe/CdTe solar cells and helps achieve high conversion efficiencies. Incorporating ZnO buffer layers in the CdSeTe/CdTe device structure has led to highly efficient and stable solar cells. In this study, the optimization of ZnO buffer layers for CdSeTe/CdTe solar cells is reported. The ZnO films are radio frequency sputter-deposited on SnO<sub>2</sub>:F coated soda-lime glass substrates. The substrate temperature for the ZnO deposition is varied from 22 to 500 °C. An efficiency of 20.74% is achieved using ZnO deposited at 100 °C. The ZnO thickness is varied between 40 nm and 75 nm. Following the ZnO depositions, devices were fabricated using First Solar's CdSeTe/CdTe absorber, CdCl<sub>2</sub> treatment, and back contact. The optimal ZnO deposition temperature and thickness is 100 °C and 65 nm, respectively. The STEM-EDX analysis shows that within the detection limits, chlorine is not detected at the front interface of the devices using ZnO deposited at 22 °C and 100 °C. However, depositing ZnO at 500 °C results in chlorine segregation appearing at the ZnO/CdSeTe boundary. This suggests that chlorine is not needed to passivate the ZnO/CdSeTe interface during the lower temperature depositions. The nanocrystalline ZnO deposited at lower temperatures results in a high-quality interface.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202401364","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ilona Lecerf, José Elìas Angulo-Cervera, Frederico Orlandini-Keller, Pierre Moritz, Fabrice Mathieu, David Bourrier, Samuel Charlot, Liviu Nicu, Thierry Leïchlé, Thibaut Devillers, Richard Haettel, Nora M. Dempsey, Thomas Blon, Lise-Marie Lacroix
{"title":"A MEMS Electromagnetic Vibration Energy Harvester with Monolithically Integrated NdFeB Micromagnets","authors":"Ilona Lecerf, José Elìas Angulo-Cervera, Frederico Orlandini-Keller, Pierre Moritz, Fabrice Mathieu, David Bourrier, Samuel Charlot, Liviu Nicu, Thierry Leïchlé, Thibaut Devillers, Richard Haettel, Nora M. Dempsey, Thomas Blon, Lise-Marie Lacroix","doi":"10.1002/admt.202401817","DOIUrl":"https://doi.org/10.1002/admt.202401817","url":null,"abstract":"<p>The monolithic integration of high-performance magnets into microfabricated devices remains a technological challenge despite the great interest for telecommunications, automotive, biomedical or space applications. Here the integration of 50 µm thick sputtered arrays of NdFeB micromagnets into a functional micro-electro mechanical system (MEMS) in-plane electromagnetic vibration energy harvester is reported. A combination of analytical modeling and numerical simulations guided the design of the magnet arrays along with ad-hoc planar coils, to produce a high transduction factor. The resulting energy harvesters deliver a voltage of 2.5 mV, a power of 6 nW under an acceleration of 0.8 g and a normalized power density of 3 × 10<sup>−4</sup> kg s m<sup>−3</sup> (20 mW m<sup>−3</sup>) for a device volume of roughly 300 mm<sup>3</sup>, which is comparable to state-of-the-art MEMS electromagnetic vibration harvesters. This study serves as a show-case for the possibility of integrating high-performance micromagnets into functional devices using microfabrication processes.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 10","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202401817","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emily Duan, Syed Ahmed Jaseem, Jeong Yong Kim, Michael D. Dickey, Matthew Bryant
{"title":"Strain Amplification via Helically Braided Fiber Reinforced Sleeve for Soft Material Energy Harvesting","authors":"Emily Duan, Syed Ahmed Jaseem, Jeong Yong Kim, Michael D. Dickey, Matthew Bryant","doi":"10.1002/admt.202402033","DOIUrl":"https://doi.org/10.1002/admt.202402033","url":null,"abstract":"<p>Soft, elastic materials (e.g., elastomers and gels) are useful for emerging devices that can deform, such as stretchable electronics and soft robots. Mechanisms exist to sense such strain deformation or convert it into electricity. This study proposes a way to amplify (increase) the strain applied to soft materials for a given external strain and thereby make more effective sensors and energy harvesters. The approach relies on a helically braided fiber reinforced sleeve that serves two purposes: 1) it adds strength and mechanical reinforcement to the soft materials it encases, while maintaining compliance and softness, and 2) it squeezes the soft material during strain, thereby elongating it and increasing the “effective” strain. As a demonstration platform, we focus on its utility for soft and stretchable variable-area electrical double layer (EDL) supercapacitor energy harvesters made of hydrogel with liquid metal electrodes. Kinematic modeling of the braided sleeve quantifies the relationship between sleeve geometry parameters and effective strain. Simulations and experiments with fabricated EDL supercapacitor energy harvesters confirm increases in peak current due to the braided sleeve. These findings suggest a simple route to enhance the sensitivity of strain sensors and the performance of mechanical energy harvesters in devices built from soft materials.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 13","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202402033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}