Advanced Materials & Technologies最新文献

{"title":"Wet‐Printed Stretchable and Strain‐Insensitive Conducting Polymer Electrodes: Facilitating In Vivo Gastric Slow Wave Mapping","authors":"Peikai Zhang, Omkar N. Athavale, Bicheng Zhu, Jadranka Travas‐Sejdic, Peng Du","doi":"10.1002/admt.202400849","DOIUrl":"https://doi.org/10.1002/admt.202400849","url":null,"abstract":"Wearable and implantable devices play a crucial role in clinical diagnosis, disease treatment, and fundamental research on the body's electrophysiology and biochemical processes. Conducting polymers are emerging as promising solutions to surpass the limitations of traditional metal‐based electrodes, offering enhanced conformability, and stretchability. However, current microfabrication techniques of CP electrodes have a number of limitations. In this study, a novel wet‐printing technique is developed for the fabrication of highly stretchable poly(3,4‐ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) microelectrodes. The wet‐printing, conducted in a liquid coagulation bath, has the advantages of being non‐contact, easy and fast to perform, and capable of printing low‐viscosity inks. Wet‐printing of PEDOT:PSS lines with a width of ≈20 µm is demonstrated. By adding D‐sorbitol as a plasticizer, an ultra‐high stretchability of PEDOT:PSS electrodes, of more than 720% is achieved while the electrodes remained conductive and strain‐insensitive up to high strains. The use of PEDOT:PSS wet‐printed electrode arrays for the electrophysiological recording from the stomach is demonstrated. The stretchable electrodes conformed swell to the tissue and recorded comparable electrophysiological signals to Au‐plated electrodes in porcine and rodent animal models. The wet‐printing approach to fabricating flexible and stretchable electrode arrays using low‐viscosity, conducting inks holds promise for applications in conformable electronics.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the Potential and Limitations of PbS and HgTe Colloidal Quantum Dot Infrared Detectors for Free Space Optical Communication","authors":"Xue Zhao, Haifeng Yao, Yanyan Qiu, Naiquan Yan, Qun Hao, Menglu Chen","doi":"10.1002/admt.202400302","DOIUrl":"https://doi.org/10.1002/admt.202400302","url":null,"abstract":"Free space optical communication with infrared light is a promising secure wireless optical communication technology, where infrared photodetectors are the core component. To date, such applications are based on epitaxial growth narrow‐band semiconductors facing the challenge of large‐area fabrication. Infrared colloidal quantum dots (CQDs) are of interest because of the high‐throughput solution processing. Here, large‐area CQD photodetectors with adjustable wavelengths covering 1.3–2.0 µm. For 1 × 1 mm<jats:sup>2</jats:sup> CQD photodetector, the response time achieved within 1 µs at room temperature, responded sharply to the 25 kbps PRBS‐7 communication code is demonstrated. For 1.5 × 1.5 cm<jats:sup>2</jats:sup> large‐area CQD photodetectors, a communication rate of 2 kbps is achieved. This work is a step toward the CQD application in the field of optical communications.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Iris‐Inspired Microparticles with a Two‐Factor Authentication Security Feature for Wet‐Phase Enhanced Anti‐Counterfeiting Strategies","authors":"Cheolheon Park, Minhyuk Lee, Hyeli Kim, Daewon Lee, Jangho Choi, Yeongjae Choi, Wook Park","doi":"10.1002/admt.202400566","DOIUrl":"https://doi.org/10.1002/admt.202400566","url":null,"abstract":"This article presents an iris‐mimicking polymeric microparticle with randomly generated silica film cracks to be utilized as a wet‐phase micro security taggant. The microparticles are designed to replicate the capillary patterns in the human iris, providing high data capacity and stability, making them ideal for authentication. Furthermore, the microparticles integrate a QR code within the pupillary zone of the iris, enabling pupillary authentication to enhance two‐factor identification and elevate overall security levels an unprecedented feature absent in conventional iris recognition systems. The resulting artificial iris‐mimicking microparticles have high coding efficiency and unique characteristics and can be authenticated in the wet phase, making them suitable for use as micro security taggants.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrohydrodynamic Printing of Biodegradable PLGA Micro‐Patterns on 3D Polymer Structures","authors":"IlHo Seo, Rizwan Ul Hassan, Byeongseok Ryu, Won‐Gun Koh, WonHyoung Ryu","doi":"10.1002/admt.202400230","DOIUrl":"https://doi.org/10.1002/admt.202400230","url":null,"abstract":"Biodegradable polymers such as polylactic‐co‐glycolic acids (PLGA) are used for various implantable devices such as tissue scaffolds, drug delivery devices, and biosensors in different forms. However, high‐resolution patterning of biodegradable polymers on implantable devices has not been explored much yet. While electrohydrodynamic printing (EHD) can achieve high‐resolution printing compared to other printing methods, EHD printing of PLGA solutions is rarely attempted due to unstable printing. Such printing instability originates from the volatile nature of PLGA inks, and it causes nozzle clogging or change of ink conditions during printing. Here, PLGA ink formulation and a voltage input profile are studied for stable and high‐resolution EHD printing. Addition of glycerol at an optimal ratio as well as the control of voltage pulse shape strongly influenced both the stability and resolution of EHD printing of PLGA patterns. With the optimized inks and voltage inputs, stable printing of PLGA micropatterns down to 5 µ<jats:italic>m</jats:italic> is achieved on both conductive and insulating surfaces for controlled drug release. Furthermore, use of a ring type electrode allows for EHD printing of PLGA micropatterns on 3D surfaces of PLLA tubes and stent struts.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hofmeister Ions‐Induced Thinning of Gelatin to Enhance 3D Printing Precision","authors":"Heng Li Chee, Jing Wen Koo, Ee En Ian Sim, Qiang Zhu, Xu Gao, Md. Faris H. Ramli, Jennifer L. Young, Andrew W. Holle, FuKe Wang","doi":"10.1002/admt.202302230","DOIUrl":"https://doi.org/10.1002/admt.202302230","url":null,"abstract":"Hydrogel 3D printing holds immense potential in fields like personalized medicine, regenerative therapies, and organ creation, offering biocompatible structures similar to the extracellular matrix. Gelatin‐Methacryloyl (GelMA) emerges as a promising candidate, while its high viscosity poses a significant challenge, especially in vat photopolymerization‐based 3D printing. Here, a new approach is presented by using Hofmeister ionic effect to substantially reduce the viscosity of high‐content (up to 60%) Gelatin bioink at room temperature with enhanced mechanical performance of the printed structures. The thinning effect induced by chaotropic Hofmeister ions is investigated through complex viscosity analysis, optical rotation measurements, and sol–gel conversion studies. The thinning effect induced by chaotropic ions enables precise 3D printing of Gelatin hydrogel, achieving accuracy comparable to prints made with polymers. Furthermore, after polymerization, the cations of the chaotropic salt change their role to cross‐linkers, leading to stronger scaffolds that exhibit biocompatibility with robust cell attachment, proliferation, and suitability for cell growth. The combination facilitates the creation of customizable structures and high printing accuracy will promote the wide application of Gelatin in the development of patient‐specific implants, drug delivery systems, and tissue scaffolds, further improving medical treatment efficacy and personalized healthcare.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High Performance Magnetic Mass‐Enhanced Triboelectric‐Electromagnetic Hybrid Vibration Energy Harvester Enabling Totally Self‐Powered Long‐Distance Wireless Sensing","authors":"Ziyue Xi, Hongyong Yu, Hengxu Du, Hengyi Yang, Yawei Wang, Mengyuan Guan, Zhaoyang Wang, Hao Wang, Taili Du, Minyi Xu","doi":"10.1002/admt.202400451","DOIUrl":"https://doi.org/10.1002/admt.202400451","url":null,"abstract":"Wireless sensor networks play a significant role in various fields, and it is promising to construct a totally self‐powered wireless sensor network by harvesting unused mechanical vibration energy. Here, a magnetic mass‐enhanced triboelectric‐electromagnetic hybrid nanogenerator (MM‐HNG) is proposed for harvesting mechanical vibration energy. The additional magnets generate magnetic fields for electromagnetic power generation. As an additional mass effectively increases the membrane's amplitude, thereby enhancing the output performance of the MM‐HNG. The peak power density of TENG in the MM‐HNG reaches 380.4 W m<jats:sup>−3</jats:sup>, while the peak power density of EMG achieves 736 W m<jats:sup>−3</jats:sup>, which can charge a 0.1 F capacitor rapidly. In addition, a totally self‐powered wireless sensing system is constructed, with the integrated microcontroller unit (MCU), which detects and processes various sensing parameters and controls wireless transmission. The system features rapid transmission speeds and an extensive transmission range (up to 1 km), and its effectiveness has been validated in a practical application aboard an actual ship. The results illustrate the MM‐HNG's broad applicability across various Internet of Things (IoT) scenarios, including smart machinery, smart transportation, and smart factories.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patterned PEDOT:PSS‐Flexible Electrode Using Electrospinning Nano‐Fiber Substrate with UV‐Induced Selective Wettability","authors":"Bin‐Hai Yu, Bin Zhang, Jia‐sheng Li, Zhou Lu, Guan‐Wei Liang, Zong‐tao Li","doi":"10.1002/admt.202400315","DOIUrl":"https://doi.org/10.1002/admt.202400315","url":null,"abstract":"Water‐soluble conductive polymer poly(3,4‐ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) has a broad application prospect in the field of flexible wearable electronics, but the simple and efficient manufacture of patterned PEDOT:PSS flexible electrodes is still challenging. In this paper, a patterned PEDOT:PSS‐flexible electrode with a electrospinning nano‐fiber substrate is proposed. The electrode substrate is produced by electrospinning a hydrophobic polyvinylidene difluoride (PVDF) matrix material loaded with TiO<jats:sub>2</jats:sub> UV‐induced hydrophilic‐hydrophobic conversion particles. The PEDOT:PSS flexible electrode is prepared using a simple UV‐induced selective wettability(UV‐SW) process and optimized vacuum filtration method. The method of manufacturing flexible electrodes based on patterned wetting film substrates is simple and feasible, while the electrode features high precision, good conductivity, and excellent deformation ability. The electrode has a line width error of less than 5%, an initial conductivity of 584.44 S m<jats:sup>−1</jats:sup>, and maintains stable conductivity under 0–180° bending and 0–30° torsion, with variation rates of only 4.9% and 2.3%, respectively. This paper presents a simple method to fabricate patterned PEDOT:PSS flexible electrode with high precision. This study provides an efficient method for the manufacturing of fibric‐based patterned flexible electrodes, this method is promising for fabric‐based wearable electronics.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141868472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bionic Microstructure-Inspired Dual-Mode Flexible Sensor with Photothermal Effect for Ultrasensitive Temperature and Strain Monitoring","authors":"Xiaohui Guo, Yongzheng Niu, Zhihao Yin, Di Wang, Long Liu, Yongming Tang, Xianghui Li, Yifang Zhang, Yu Li, Tianxu Zhang, Xiaowen Zhu, Yiman Xu, Ziwen Zhang, Siwen Ding, Dandan Wang, Bing Yang, Zhihong Mai, Weiqiang Hong, Wenrui Xu, Qi Hong, Yunong Zhao, Feng Yan, Ming Wang, Guozhong Xing","doi":"10.1002/admt.202400701","DOIUrl":"https://doi.org/10.1002/admt.202400701","url":null,"abstract":"Flexible dual-mode sensors play a pivotal role in information exchange between humans and the environment. However, achieving dual-mode sensing encompassing both flexibility and stretchability, while accurately quantifying stimulus signals such as temperature, remains a significant challenge. This paper presents a novel flexible dual-mode strain/temperature sensor (DMSTS) that utilizes graphite powder (GR)/polyaniline (PANI)/silicone rubber composites, inspired by the bionic microstructure of a centipede's foot. The DMSTS exhibits an exceptional strain detection range (≈177%), and a low limit of detection (0.5% strain). Regarding temperature sensing, the DMSTS demonstrates a positive temperature coefficient effect within the range of 25–90 °C, with an ultrahigh sensitivity of 10.3 within the 75–90 °C range. Leveraging the photothermal characteristics of GR and PANI, the DMSTS holds significant promise for applications in human motion detection, infrared imaging, and photothermal effects. When integrated into an intelligent sensing system, it enables dynamic noncontact temperature measurement, human micro-expression detection, and motion joint monitoring. Additionally, by incorporating a flexible thermochromic film with color-changing ink, the DMSTS transforms temperature detection into a visually intuitive operation. With its versatile dual-mode sensing capabilities, the DMSTS exhibits substantial potential in the fields of wearable electronics and healthcare.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrolytic Micro-Capacitors Based on Tantalum Films for High Voltage Applications","authors":"Cédric Teyssedou, Jérémie Chaillou, Isabelle Roch-Jeune, David Troadec, Marielle Huvé, Pascal Roussel, Christophe Lethien","doi":"10.1002/admt.202400682","DOIUrl":"https://doi.org/10.1002/admt.202400682","url":null,"abstract":"Electrolytic capacitors are known to be fast devices with very low time constant and able to deliver high power. This class of capacitors is then an interesting technology to power miniaturized embedded electronics for Internet of Things applications. However, the current electrolytic capacitor suffers from its bulky size that does not fit with the miniaturization. To solve this issue, a proof-of-concept consisting of miniaturizing an electrolytic capacitor based on tantalum materials to give rise to a new class of electrolytic micro-capacitors is proposed. To reach this ambitious objective, thin films (&lt;100 nm) of tantalum metal (Ta), tantalum nitride (TaN), and tantalum oxide (Ta₂O₅) are deposited on a Si substrate by sputtering deposition method. After a careful optimization of the deposition parameters, Ta/Ta₂O₅ and TaN/Ta₂O₅ electrodes (Ta and TaN ≈45 nm and Ta₂O₅ ≈25 nm) and study their behaviors when biased at high voltage (&gt;20 Volts) in aqueous electrolyte are produced. The Ta/Ta₂O₅ and TaN/Ta₂O₅ interfaces when the electrode is polarized near and beyond the breakdown voltage of the dielectric layer are carefully investigated. Polarizing the electrodes beyond the breakdown voltage are shown to result in anodization-like mechanisms. In the case of the TaN/Ta₂O₅ electrode, an N-rich porous layer grew within the Ta₂O₅ layer as polarization increased. A comparative study on the 2 stacked layers electrodes with different compositions (Ta/Ta₂O₅ and TaN/Ta₂O₅) but similar thicknesses (45/25 nm) is carried out: both electrodes show excellent capacitance retention of over 90% over 300 000 cycles. The frequency behavior of Ta/Ta₂O₅ and TaN/Ta₂O₅ electrodes shows that both are potential candidates in electrolytic micro-capacitors for powering miniaturized electronics.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optomechanical Cavities Based on Epitaxial GaP on Nominally (001)-Oriented Si","authors":"Paula Mouriño, Laura Mercadé, Miguel Sinusía Lozano, Raquel Resta, Amadeu Griol, Karim Ben Saddik, Enrique Barrigón, Sergio Fernández-Garrido, Basilio Javier García, Alejandro Martínez, Víctor J. Gómez","doi":"10.1002/admt.202400525","DOIUrl":"https://doi.org/10.1002/admt.202400525","url":null,"abstract":"Gallium Phosphide (GaP) has recently received considerable attention as a suitable material for building photonic integrated circuits due to its remarkable optical and piezoelectric properties. Usually, GaP is grown epitaxially on III–V substrates to keep its crystallinity and later transferred to silicon wafers for further processing. Here, an alternative promising route for the fabrication of optomechanical (OM) cavities on GaP epitaxially grown on nominally (001)-oriented Si is introduced by using a two-step process consisting of a low-temperature etching of GaP followed by selective etching of the underneath silicon. The low-temperature (–30 °C) during the dry-etching of GaP hinders the lateral etching rate, preserving the pattern with a deviation between the design and the pattern in the GaP layer lower than 5%, avoiding the complex process of transferring and bonding a GaP wafer to a silicon-on-insulator wafer. To demonstrate the quality and feasibility of the proposed fabrication route, suspended OM cavities are fabricated and experimentally characterized. The cavities exhibit optical quality factors between 10³ and 10⁴ at telecom wavelengths, and localized mechanical resonances ≈3.1 GHz with quality factors ≈63 when measured at room temperature. These results suggest a simple and low-cost way to build GaP-based photonic devices directly integrated on industry-standard Si(001) photonic wafers.","PeriodicalId":7200,"journal":{"name":"Advanced Materials & Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}