Article
Chemistry, Analytical
Yingying Xiao, Mengzhu Wang, Ye Li, Zhicheng Sun, Zilong Liu, Liang He, Ruping Liu
Summary: Electrical physiology signals are essential for human activity research and recording, with EP electrodes playing a key role in sensor development; significant progress has been made in flexible and high-adhesive EP electrode technology in the past decade.
Article
Chemistry, Physical
Dexin Chen, Mingqiang Zhou, Jiacheng Hu, Zhixin Kang
Summary: A highly adhesive, reflective and conductive graphene-silver composite film was successfully fabricated using electroless plating and spray-spin-spray technique. The composite film showed improvements in peel strength, reflectance, and sheet resistance compared to commercial silver films, as well as maintained good conductive stability after bending and exposure to salt spray environment. These results suggest that the composite films have great potential for applications in flexible electronics.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Tomasz Raczynski, Daniel Janczak, Jerzy Szalapak, Sandra Lepak-Kuc, Dominik Baraniecki, Maria Muszynska, Aleksandra Kadziela, Katarzyna Wojkowska, Jakub Krzeminski, Malgorzata Jakubowska
Summary: This study analyzes the impact of different parameters in the heat transfer process on the electrical and mechanical properties of flexible electronics made on textiles, demonstrating its viability as a manufacturing method.
Article
Nanoscience & Nanotechnology
Yoongook Park, Hoyun Byun, Jun Hyup Lee
Summary: This study presents a highly elastic and transparent adhesive film using tailored dual-stiffness nanoparticles, which offer excellent optical transparency and high adhesion strength. The nanoparticles within the adhesive film improve its elastic properties and optimize stress relaxation ratio and strain recovery rate, making it essential for flexible electronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Xiaowen Yin, Junliang Yang, Haibo Wang
Summary: The vertical phase separation (VPS) structure in organic thin-film transistors (OTFTs) has attractive features for commercialization, including excellent device performance, uniformity, reproducibility, stability, and low-cost fabrication. This comprehensive review covers the evolution, formation mechanism, optimization strategies, fabrication techniques, and potential applications of VPS structures in flexible and stretchable OTFTs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xuepei Wang, Mengjie Zhang, Luwei Zhang, Jinchao Xu, Xinqing Xiao, Xiaoshuan Zhang
Summary: This paper reviews the recent research progress on the preparation of flexible sensors by inkjet printing, including key functional materials, fabrication processes, and applications. The key fabrication techniques, characterization techniques, and optimization methods are highlighted. The opportunities and challenges of inkjet printed flexible sensors are discussed in comparison with traditional rigid sensors.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Kwang Wook Choi, Cheol Shin, Sungwoo Jun, Soo Jong Park, Yooji Hwang, Jin Ho Kwak, Young Wook Park, Jong-Woong Kim, Byeong-Kwon Ju
Summary: A simple two-layer multi-sensor has been fabricated using a non-vacuum solution process in order to address the issues associated with conventional rigid sensors, with high manufacturing costs and risk of peeling. The sensor has a light-sensitive optical response and minimal damage by external adhesives, making it suitable for use as a touch sensor and light sensor in various fields.
Article
Engineering, Electrical & Electronic
Adam M. Weidling, Vikram S. Turkani, Vahid Akhavan, Kurt A. Schroder, Sarah L. Swisher
Summary: The photonic lift-off (PLO) process can rapidly separate polymer films from rigid carriers, enabling the fabrication of flexible electronics.
NPJ FLEXIBLE ELECTRONICS
(2022)
Article
Engineering, Biomedical
Ziyue Wu, Xueting Li, Zhijie Feng, Chunxue Wan, Ya Li, Tianyu Li, Qing Yang, Xinyu Liu, Miaoning Ren, Jiameng Li, Xue Shang, Xiangyu Zhang, Xian Huang
Summary: Advances in wearable bioelectronics have provided important tools for non-invasive measurements of physiological parameters. This system demonstrates the capability to simultaneously and accurately monitor electrocardiogram, photoplethysmogram, body temperature, and acceleration, allowing for dynamic multiparameter recording with low disturbance from motion artifacts. It holds potential for large-scale health monitoring and assisting in public health crisis management.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Engineering, Aerospace
Jianjun Wu, Zengkun Zhang
Summary: This paper proposes a new comprehensive strategy for controlling springback of 3D tubes, which involves optimizing the manufacturing shape and acquiring forming parameters through discretization. Experimental results show partial effectiveness and suggest potential to reduce difficulties in parameter determination in the future.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Chemistry, Analytical
Ahmad Jaafar, Spyridon Schoinas, Philippe Passeraub
Summary: This study presents a newly developed process for the fabrication of multilayer circuits based on pad-printing technique, allowing the superposition of conductive and insulating layers. The versatility of pad-printing technique enables printing on various substrates, including flexible, curved or irregular surfaces, making it advantageous compared to other printing processes. The study demonstrates the functionality of pad-printing through test patterns and a multilayer circuit controlling LEDs, providing recommendations for high printing quality and aiming for a low-cost, fast, and environmentally-friendly production of printed electronics.
Article
Engineering, Aerospace
Douglas C. Hofmann, Punnathat Bordeenithikasem, Yuhang Zhu, Yufei Liu, Nathan J. Conrad, B. Alan Davis, Eric L. Christiansen, Ali Shakouri, Saeed Mohammadi
Summary: In this study, a passive sensor system for spacecraft shield against micrometeoroid and orbital debris (MMOD) was developed. The sensor was fabricated using a conductive metal ink screen-printed on flexible Kapton, suitable for low-cost fabrication of large areas of sensors. The sensor was integrated into a low density, two-wall Whipple shield and tested with hypervelocity impacts to determine the impact size, impact location, and predict the impact energy of the damage.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Ali Nawaz, Leandro Merces, Leticia M. M. Ferro, Prashant Sonar, Carlos C. B. Bufon
Summary: The development of flexible and conformable devices is a significant step towards the realization of next-generation wearable and e-textile applications. Organic field-effect transistors (OFETs), specifically planar and vertical OFETs (POFETs and VOFETs), are particularly interesting due to their low-temperature solution processability, mechanical flexibility, and compatibility with plastic and biodegradable substrates. This in-depth review critically discusses the electrical, mechanical, and physical properties of POFETs and VOFETs, with a focus on key applications such as integrated logic circuits, light-emitting devices, memories, and sensors.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dayue Jiang, Hamzeh A. Al Shraida, Fuda Ning
Summary: Flexible electronics technology involves assembling electronic materials on a flexible substrate, but issues like rigid traces and uncontrollable electrical resistance persist. A study on a four-axis additive manufacturing method for creating non-planar flexible electronics shows promising results in reducing resistance and achieving high dimensional accuracy.
Article
Anatomy & Morphology
Joissi Ferrari Zaniboni, Aryvelto Miranda Silva, Eduardo Fernandez, Cristiane de Melo Alencar, Jessika Mayhara Pereira Morais, Edson Alves de Campos, Milton Carlos Kuga
Summary: The study revealed that eugenol-containing and eugenol-free temporary cements exhibit higher residue persistence at the apical region, resulting in reduced bond strength of the dental posts. However, the impact on dentinal penetration is mainly observed in the apical region.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Chemistry, Multidisciplinary
Siyuan Li, Xuhui Xia, Bryan D. Vogt
Summary: In this study, small and dispersed iron oxide nanoparticles were synthesized on reduced graphene oxide networks through microwave heating with low-cost iron nitrate. The strong coupling of microwave radiation with the graphene network allowed for rapid formation of nanoparticles, followed by quick cooling to minimize crystal growth. Small changes in microwave reaction time led to significant changes in iron oxide morphology.
Article
Chemistry, Physical
Ziyuan Gong, Nicole S. Zacharia, Bryan D. Vogt
Summary: This study investigated the influence of SDS on the structure and properties of Pluronic F108-polyacrylic acid (PAA) coacervates, finding that increasing SDS concentration leads to changes in water content, relative concentration of PAA, and rheological properties. However, the change in rheological properties does not appear to be correlated with large scale structural differences in the coacervate.
Article
Materials Science, Multidisciplinary
Siyuan Li, Mengxue Zhang, Bryan D. Vogt
Summary: The addition of IPA, SDS, and CTAB at low concentrations increases the swelling of the hydrogel film, decreases the elastic modulus, and increases the rheological phase angle. However, at higher concentrations, a transition from swelling to (partial) dissolution may occur in the hydrogel.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Szu-Hao Cho, Piljae Joo, Chi Zhang, Elizabeth A. Lewis, Bryan D. Vogt, Nicole S. Zacharia
Summary: This study demonstrates a simple and practical approach to generate patterned slippery surfaces without the need for complex chemical modification. By preparing a super-hydrophobic base film and coating a BPEI patterning solution, a slippery surface with the ability to constrain liquid motion can be achieved.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Manufacturing
Jia-Ruey Ai, Bryan D. Vogt
Summary: This study investigated the impact of print path and print sequence on the mechanical properties of polycarbonate and polypropylene. The results showed that the interlayer time between printed roads should be controlled within 5 seconds to observe statistical differences in mechanical response. Additionally, the specimen size and raster angle significantly influenced the mechanical properties, with larger effects observed when printing polycarbonate compared to polypropylene.
PROGRESS IN ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Chemical
Fang Peng, Bryan D. Vogt, Miko Cakmak
Summary: The application of 3D printing using thermoplastics has been limited by their poor mechanical strength. This study demonstrates that core-shell structured filaments can improve interfacial bonding and enhance mechanical strength.
INTERNATIONAL POLYMER PROCESSING
(2022)
Article
Chemistry, Physical
Pablo I. Sepulveda-Medina, Chao Wang, Ruipeng Li, Masafumi Fukuto, Bryan D. Vogt
Summary: The local environment within a hydrogel affects the properties of water, including ice crystallization. This study examined the antifreeze properties of equilibrium-swollen amphiphilic copolymers with different hydrophobic segments. The results showed that the strength of hydrophobic associations influenced the efficacy of ice inhibition. In general, the addition of ethylhexyl acrylate was less effective for ice inhibition compared to covalently crosslinked hydrogels.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Ceramics
Huseyin Kaya, Stephane Gin, Bryan D. Vogt, Seong H. Kim
Summary: This study investigates the aqueous corrosion mechanism of a model boroaluminosilicate glass at ground water relevant pHs. The results reveal that alteration layers formed under different pH conditions exhibit similar porous network structures, but with differences in bond lengths and bond angles in the glass network. Furthermore, the relative abundance of hydrous species within the alteration layer appears to be pH-dependent.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Manufacturing
Jia-Ruey Ai, Siyuan Li, Bryan D. Vogt
Summary: Rapid microwave post-processing is shown to greatly improve the mechanical properties of 3D printed PEEK, particularly in terms of elastic modulus and stress at break. The method does not affect the crystallinity of the material, but improves the interfaces between printed roads, resulting in increased mechanical properties. This simple post-processing technique can be applied to other commercial engineering plastic filaments containing carbon or other microwave active fillers.
ADDITIVE MANUFACTURING
(2022)
Article
Polymer Science
Sierra F. Yost, Christian W. Pester, Bryan D. Vogt
Summary: By controlling the molecular mass distribution, the mechanical properties of 3D printed thermoplastics can be improved, providing a simple and effective approach compared to more complex methods.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Mario. V. V. Ramos-Garces, Dodangodage Ishara Senadheera, Karthik Arunagiri, Polyxeni. P. P. Angelopoulou, Georgios Sakellariou, Ke Li, Bryan. D. D. Vogt, Revati Kumar, Christopher. G. G. Arges
Summary: Ion-exchange membranes (IEMs) are widely used in various applications in electrochemical systems. The chemical composition and macromolecular architecture of ion-conducting polymers play a crucial role in ion and water transport. This study focuses on the preparation of different microphase separated block copolymer electrolytes (BCEs) with distinct side chain chemistries. The results show that the more hydrophobic alkyl side chains exhibit significantly higher ionic conductivity compared to alkoxy and zwitterionic side chains.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Physical
Szu-Hao Cho, Elizabeth A. Lewis, Nicole S. Zacharia, Bryan D. Vogt
Summary: Layer-by-layer assembly allows controlled coatings with the ability to manipulate composition through thickness. Non-destructive quantification of depth dependence of allyl content in these coatings is demonstrated using IR spectroscopic ellipsometry, revealing dynamic dissolution-deposition processes and mechanisms for exponential growth in LbL assemblies.
Article
Materials Science, Multidisciplinary
Jia-Ruey Ai, Fang Peng, Piljae Joo, Bryan D. Vogt
Summary: The study explores the trade-offs between mechanical properties and dimensional accuracy in 3D printing of plastics using a core-shell filament structure. Increasing the glass transition temperature of the core polymer significantly improves dimensional accuracy, while impact resistance of the core-shell structure depends on the core polymer selected.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Bing Li, Chao Zhang, Fang Peng, Wenzhi Wang, Bryan D. Vogt, K. T. Tan
Summary: This study introduces and demonstrates a tunable, locally resonant structural waveguide based on 3D printing, using shape memory polymer modules to achieve active vibration bandgap switching and elastic wave manipulation successfully.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Vincent M. Torres, Jacob A. LaNasa, Bryan D. Vogt, Robert J. Hickey
Summary: The in situ polymerization method successfully increases the number of effective junctions per chain by grafting poly(styrene) onto a commercial thermoplastic elastomer, SBS, resulting in enhanced mechanical performance. Nanostructural transitions from disordered spheres to lamellar structures were identified with increasing styrene content, with samples exhibiting lamellar structures showing maximum mechanical performance at 61-77 wt% PS.This work demonstrates the use of RIPT to transform standard SBS materials into polymer systems with improved mechanical properties.
