Article
Materials Science, Multidisciplinary
Zachary A. Siefker, John N. Hodul, Carsten Flores-Hansen, George T-C Chiu, James E. Braun, Jeffrey F. Rhoads, Bryan W. Boudouris
Summary: This article introduces a low-cost CO2 sensor for measuring indoor air quality and discusses the impact of temperature on sensor performance. The experimental results show that the adsorption capacity of the polymer for CO2 decreases with increasing temperature, providing guidance for the development of low-cost and small-scale indoor air quality sensors.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Wen Zhang, Dequan Chen, Xin Wang, Xingyi Xie
Summary: This study presents a simplified synthesis method for polyethylenimine (PEI) by using 2-haloethylamine in aqueous solution without separating the aziridine intermediate. The optimized two-stage process at different temperatures allows the conversion of 2-chloroethylamine into aziridine and PEI oligomer, and the subsequent ring-opening polymerization of aziridine to form PEI chains. The impurities in the final polymers are significantly reduced compared to traditional methods. This study provides insights into the mechanism of aziridine polymerization under basic conditions and offers a safer and more economical approach to manufacturing PEI polymers.
Article
Chemistry, Analytical
Maeum Han, Soonyoung Jung, Yeonsu Lee, Daewoong Jung, Seong Ho Kong
Summary: In this study, a PEI-functionalized CNT sensor was fabricated for detecting carbon dioxide at room temperature. The sensor exhibited better sensitivity to CO2 gas compared to the pristine CNT sensor, and showed good repeatability and selectivity. The morphology and properties of the sensor were analyzed using SEM, Raman spectroscopy, and FT-IR spectroscopy.
Review
Chemistry, Inorganic & Nuclear
Chao Zhang, Kaichun Xu, Kewei Liu, Jinyong Xu, Zichen Zheng
Summary: With the development of economy and society, the detection of carbon dioxide (CO2) has attracted more attention. Metal oxide semiconductor materials have been widely used in CO2 detection due to their various crystal structures, micro-nano morphologies, simple preparation process, and low cost. This article reviews the sensing mechanism and sensitization methods of CO2 gas sensing materials based on metal oxides, and introduces the CO2 sensing properties of chemical resistive sensors based on various metal oxide semiconductors, such as SnO2, ZnO, TiO2, and BaTiO3.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Yuan He, Deng Pan, Hang Chi, Feiyu Luo, Yuan Jiang, Dongtao Ge, Hua Bai
Summary: A universal oxidant-intermediated surface polymerization method for fabricating conducting polymer coatings and patterns on various substrates was reported, showing successful application on different materials and providing a powerful tool for conducting polymer-based device fabrication.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Pei-Bo Chen, Jia-Wen Yang, Zhi-Xiu Rao, Qing Wang, Hai-Tao Tang, Ying-Ming Pan, Ying Liang
Summary: Efficient utilization of CO2 is crucial in achieving carbon neutralization, and one challenge is the in-situ conversion of low concentration CO2 found in waste gases. This study introduces a novel heterogeneous catalyst, Ag@POP-NL-3, which exhibits high efficiency and selectivity in absorbing and activating CO2 from lime kiln waste gas. This catalytic system achieves both CO2 capture and resource utilization simultaneously, effectively converting low-concentration CO2 into valuable chemicals.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Shu-Meng Hao, Shuang Liang, Christopher D. Sewell, Zili Li, Caizhen Zhu, Jian Xu, Zhiqun Lin
Summary: The development of lithium-based batteries has rapidly progressed in recent decades, with a focus on polymer electrolytes to enhance safety and energy storage capabilities. By designing and synthesizing branched polymers, researchers have increased the ionic conductivity of these electrolytes, leading to improved lithium transport in batteries. This Mini Review summarizes the diversity of branched polymers for polymer electrolytes and provides design principles for enhancing their physical, mechanical, and electrochemical performance. Challenges and future prospects in this field are also outlined.
Article
Chemistry, Multidisciplinary
Xueqing Wang, Fanglan Yao, Pengcheng Xu, Ming Li, Haitao Yu, Xinxin Li
Summary: Based on real-time observations of ZnO nanowires sulfurization processes in SO2 atmosphere using in situ TEM, a quantitative structure-activity relationship (QSAR) is revealed. The ZnO-100 nm nanowires gradually transform into core-shell nanostructures, while sparse nanoparticles are observed on the surface of ZnO-500 nm sample, indicating weak solid-gas interaction with SO2. The QSAR model is validated with adsorption heat data and aberration-corrected TEM characterization, leading to exploration of adsorbing/sensing applications of ZnO nanomaterials.
Article
Polymer Science
Byung-Ho Kang, In-Yong Jeong, Sung-Hoon Park
Summary: Hybrid conducting composites with broad sensing capabilities and low hysteresis were developed to address the challenges of flexible strain sensors, offering increased tensile strain and reduced plastic deformation. These bi-layer materials showed excellent reproducibility and a wider sensing range compared to single-layer composites.
Article
Chemistry, Physical
Maria Kurian, Vidyanand Vijayakumar, Narugopal Manna, Fayis Kanheerampockil, Suresh Bhat, Sreekumar Kurungot
Summary: This work proposes a new strategy of UV light-assisted in situ polymerization to enhance the performance of quasi-solid-state zinc-air batteries (ZABs). The strategy is also suitable for a mechanically stable OH- conducting anion exchange polymer electrolyte membrane (AEPEM) reinforced by a glass fiber (GF) separator. The in situ polymerized ionomer-skin/interlayer acts as a buffer layer to narrow down the performance gap between quasi-solid-state ZABs and standard liquid electrolytes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Analytical
Dovydas Barauskas, Donatas Pelenis, Mindaugas Dzikaras, Gailius Vanagas, Marius Mikolaju, Jonas Baltrusaitis, Darius Virzonis
Summary: The prototype gravimetric microelectromechanical imine functionalized CO2 sensor equipped with custom electronics and significantly increased stability under sub-percent concentrations is investigated. Instabilities caused by relative air humidity were eliminated by two in-situ calibration methods: two-channel readings correction and single-channel correction by the reference disturbance. Capacitive micromachined ultrasound transducers (CMUT) were designed for 15 MHz nominal resonance frequency, while actual sensor readings were lower (over 12 MHz) due to the functionalization. The resonance frequency of polyethyleneimine (PEI) functionalized CMUT during sub-percent CO2 detection experienced instabilities of several hundred Hz while the relative humidity of the air was changed between 10% and 35%. Readings of graphene oxide (GOx) functionalized CMUT working in parallel with PEI functionalized CMUT were used for two-channel correction, resulting in highly stable sensor output, characterized by 3.2 Hz standard deviation during almost one-hour experiment, while relative humidity varied between 10% and 25%. Single channel reading correction method resulted in larger residual instability, characterized by a standard deviation of up to 36 Hz over a two-hour experiment, however, it was found to be more effective for longer humidity-induced drifts, since reference disturbance of known relative humidity of 75% maintained by saturated NaCl solution technique was used.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Composites
Yinghong Yu, Xiao Liu, Xiyue Cui, Yishou Wang, Xinlin Qing
Summary: This study developed an innovative multifunctional piezoelectric-fiber hybrid sensor network for comprehensive monitoring of multiple physical quantities during the curing process of thick carbon fiber-reinforced polymer (CFRP) composites. Three different approaches based on non-invasive and integrated piezoelectric lead-zirconate-titanate (PZT) sensor network were effectively developed to track the degree of cure and key steps using guided wave velocity and amplitude. The proposed sensor network demonstrated its effectiveness in in-situ and real-time monitoring of multiple physical quantities during the curing cycle, contributing to the advancement in smart manufacturing and life-cycle structural health monitoring of composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Carlos Alberto Augusto Sanchez Quinones, Vicente Ismael Agueda Mate, Jose Antonio Delgado Dobladez, Silvia Alvarez-Torrellas, Marcos Larriba, Maria Martin-Martinez
Summary: In order to fulfill the Paris Agreement, CO2 capture technologies must be developed to reduce Green House Gas emissions. Adsorption is considered a viable technology due to its mild conditions. Selective sorbents with high CO2 adsorption capacities are needed. This study used branched poly-ethylenimines (PEI) with different average molecular weights, agglomerated with silica at different weight percentages. Adsorption was measured and kinetic parameters were estimated. The results showed that the materials produced were selective and had potential use in adsorption processes, with the sample of the lowest average molecular weight having the highest adsorption capacity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Electrical & Electronic
Wei Liu, Tingting Yao, Kun Jia, Jianyu Gu, Donghong Wang, Xuehong Wei
Summary: The composite film prepared with in situ polymerization and blade coating process shows high electrical and thermal conductivity, as well as outstanding EMI shielding performance. Additionally, the film achieves high EMI SE at 65.3 dB with a thickness of 80 μm.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Analytical
Shinji Tamura, Nobuhito Imanaka
Summary: Gas sensors with trivalent cation-conducting solids have been reviewed, and it has been found that these sensors exhibit high sensing performances for CO2, NOx, and NH3 even at moderate temperatures. This discovery provides a strategy for developing novel solid electrolyte-type gas sensors with enhanced selectivity, sensitivity, and long-term stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Polymer Science
Yoshihiro Ohta, Chih-Feng Huang, Yi-Huan Lee, Chi-An Dai, Tsutomu Yokozawa
Summary: Well-defined block copolymers consisting of hyperbranched polyamide and polystyrene were synthesized and their self-assembled structures in solutions were investigated. The morphology of the resulting copolymers varied with different compositions and solvent conditions, including the formation of spherical micelles and vesicles.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Electrochemistry
Tzu-Hsuan Wang, Chia-Yu Lin, Yu-Cheng Huang, Chia-Ying Li
Summary: In this work, a facile and scalable electrosynthetic approach was developed to prepare core-shell-structured polyaniline|gold nanoparticles nanofiber (nanoPANI|Au) as an efficient electrocatalyst for electrochemical CO2 reduction (e-CO2RR). Under optimal conditions, the prepared nanoPANI|Au exhibited high turnover frequency of 0.40 s-1 and CO-mass activity of 5.67 A g-1 with satisfactory selectivity (Faradaic efficiency: 70.0 +/- 2.1%) for CO generation in 0.1M NaHCO3 at a moderate over-potential of 0.59 V. This work opens a new avenue for the preparation of core-shell-structured conducting polymer|metal nanoparticles as electrocatalysts for e-CO2RR.
ELECTROCHIMICA ACTA
(2023)
Article
Cardiac & Cardiovascular Systems
Yu-Tsung Shih, Shu-Yi Wei, Jin-Hua Chen, Wei-Li Wang, Hsin-Yi Wu, Mei-Cun Wang, Chia-Yu Lin, Pei-Lin Lee, Chih-Yuan Lin, Hung-Che Chiang, Yu-Ju Chen, Shu Chien, Jeng-Jiann Chiu
Summary: This study reveals the regulation of vascular endothelial phosphoproteins induced by disturbed flow and their contribution to atherogenesis. The phosphorylation of vinculin at serine 721 induced by disturbed flow promotes endothelial permeability and atherosclerosis. The level of endothelial VCLS721p is a clinicopathological biomarker for atherosclerosis progression.
EUROPEAN HEART JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Yuanwen Jiang, Artem A. Trotsyuk, Simiao Niu, Dominic Henn, Kellen Chen, Chien-Chung Shih, Madelyn R. Larson, Alana M. Mermin-Bunnell, Smiti Mittal, Jian-Cheng Lai, Aref Saberi, Ethan Beard, Serena Jing, Donglai Zhong, Sydney R. Steele, Kefan Sun, Tanish Jain, Eric Zhao, Christopher R. Neimeth, Willian G. Viana, Jing Tang, Dharshan Sivaraj, Jagannath Padmanabhan, Melanie Rodrigues, David P. Perrault, Arhana Chattopadhyay, Zeshaan N. Maan, Melissa C. Leeolou, Clark A. Bonham, Sun Hyung Kwon, Hudson C. Kussie, Katharina S. Fischer, Gurupranav Gurusankar, Kui Liang, Kailiang Zhang, Ronjon Nag, Michael P. Snyder, Michael Januszyk, Geoffrey C. Gurtner, Zhenan Bao
Summary: Smart bandages based on multimodal wearable devices have the potential to monitor and intervene in the healing process of chronic wounds. However, the integration of sensors and stimulators in current smart bandage technologies is limited. In this study, a flexible bioelectronic system with wireless power, closed-loop sensing and stimulation circuits, and skin-interfacing hydrogel electrodes with switchable adhesion was developed to address these challenges. The wound care system showed improved healing and tissue regeneration in preclinical wound models.
NATURE BIOTECHNOLOGY
(2023)
Article
Polymer Science
Ping-Jui Yu, Yan-Cheng Lin, Chia-Yu Lin, Wen-Chang Chen
Summary: Diverse approaches have been presented to synthesize intrinsically stretchable conjugated polymers, but compromise in charge carrier mobility is often observed. This study engineered polythiophenes with flexible or rigid backbones and different side chains to improve their mechanical tolerance and amorphous content. The best mobility-stretchability properties were observed in polythiophene with a quaterthiophene backbone and thienyl-ester-substituted side chains. The jointed design of biaxial extension and ester functional groups proved to be efficacious in improving the mobility-stretchability properties of polythiophenes.
Article
Nanoscience & Nanotechnology
Gaurav Kumar Silori, Subashchandrabose Thoka, Kuo-Chuan Ho
Summary: The applicability of nanofillers in gel polymer electrolyte (GPE)-based devices has significantly increased in the past decade. However, the development of their applicability in GPE-based electrochromic devices (ECDs) has been limited due to challenges such as optical inhomogeneity, transmittance drop, and poor electrolyte fabrication methodologies. In this study, a reinforced polymer electrolyte tailored through PVDF-HFP, BMIMBF4, and various types of mesoporous SiO2 nanofillers was demonstrated to address these issues.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Chih-Yuan Sung, Chia-Yu Lin, Chu-Chen Chueh, Yan-Cheng Lin, Wen-Chang Chen
Summary: Until now, the study of the mobility-stretchability of semiconducting polymers has received extensive attention, but little focus has been placed on their morphology and field-effect transistor characteristics under compressive strains, which are equally important in wearable electronic applications. This research applies a contact film transfer method to evaluate the mobility-compressibility properties of conjugated polymers. Various isoindigo-bithiophene conjugated polymers with different side chains are investigated, and it is found that P(SiO-Si) outperforms other symmetric polymers in dissipating strain and enhancing mechanical durability. The contact film transfer technique is also demonstrated to be applicable for studying the compressibility of different semiconducting polymers. These results provide a comprehensive understanding of the mobility-compressibility properties of semiconducting polymers under tensile and compressive strains.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Polymer Science
Megumi Matsuda, Chia -Yu Lin, Kazushi Enomoto, Yan-Cheng Lin, Wen-Chang Chen, Tomoya Higashihara
Summary: In this study, the development of stretchable semiconducting polymers through statistical terpolymerization with conjugation break spacers (CBSs) was investigated. The inclusion of thioether units into naphthalenediimide (NDI)-based semiconducting polymers was found to significantly affect their semiconductivity and stretchability, compared to alkyl- and ether-based CBSs.
Article
Multidisciplinary Sciences
Fu-Xiang Rikudo Chen, Chia-Yu Lin, Hui-Ying Siao, Cheng-Yuan Jian, Yong-Cheng Yang, Chun-Liang Lin
Summary: In this study, a deep learning-based atomic defect detection framework (DL-ADD) is proposed to efficiently detect atomic defects in molybdenum disulfide (MoS2) and generalize the model for defect detection in other TMD materials.
Article
Health Care Sciences & Services
Yi-Huei Chang, Szu-Ying Pan, Chia-Yu Lin, Chi-Ping Huang, Chi-Jung Chung, Yung-Hsiang Chen, Wen-Chi Chen
Summary: Prostate abscess (PA) is a potentially life-threatening condition that requires prompt treatment. However, the declining incidence of PA in developing countries and high-risk patients can hinder early diagnosis. This study aimed to review the etiology, pathophysiology, diagnosis, and treatment options for PA, as well as analyze the characteristics and clinical course of patients. The findings can guide the development of a personalized treatment strategy for patients with PA.
JOURNAL OF PERSONALIZED MEDICINE
(2023)
Article
Health Care Sciences & Services
Chia-Hui Chen, Chia-Yu Lin, Chiao-Ling Chen, Kuan-Ting Chen, Cho Lee, Ya-Hsin Yu, Chiao-Yu Shih
Summary: This study investigated the effectiveness of regular physical exercise-based swallowing intervention for reducing coughing and choking in older adults with dementia. The findings suggest that such intervention can effectively alleviate coughing and choking problems and its effectiveness is long-lasting. However, individuals with more advanced age and higher dementia levels may experience shorter-term effectiveness from the intervention.
Article
Nanoscience & Nanotechnology
Ting-Wei Chang, Yu-Ching Weng, Yi-Ting Tsai, Yuanwen Jiang, Naoji Matsuhisa, Chien-Chung Shih
Summary: The manipulation of the polymer backbone structure has a profound influence on the crystalline behavior and charge transport characteristics of polymers. This study proposes a universal strategy to boost the stretchability of polymers by incorporating a nonlinear conjugated linker (NCL) into the main chain. The introduction of the NCL disrupts the linearity and central symmetry of the conjugated polymer backbone, reshaping the polymer conformation and increasing its stretchability. This method is applicable to a wide range of donor-acceptor pair polymers and does not compromise the mobility of the polymer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Chia-Wei Lee, Chia-Hsing Lin, Lyu-Ying Wang, Yi-Huan Lee
Summary: This study developed a sustainable nanocomposite foam system with outstanding EMI shielding performance by synthesizing a green thermoplastic polyamide elastomer (TPAE) system from recycled PET and adding single-walled carbon nanotubes (SWCNTs) for the manufacture of TPAE/SWCNT nanocomposites. The foam achieved a favorable conductivity of 0.15 S/cm and an extremely high specific shielding effectiveness (SSE) of 213.26 (dB cm3/g) with excellent durability. The foam can be easily recycled, reprocessed, and refoamed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yun-Ju Liao, Shih-Ching Huang, Chia-Yu Lin
Summary: This study explores the electrosynthesis of 6-hydroxyhexanoic acid and adipic acid from the electrochemical oxidation of hexanediol at a nanoporous nickel oxyhydroxide modified electrode as an environmentally-friendly alternative to their fossil fuel-based industrial syntheses. The effects of electrolysis conditions on faradaic efficiency and product distribution were examined, and a scale-up electrosynthesis using a flow-type electrolyzer was demonstrated.
FARADAY DISCUSSIONS
(2023)
Article
Education & Educational Research
Hui-Tzu Chang, Chia-Yu Lin, Wei-Bin Jheng, Shih-Hsu Chen, Hsien-Hua Wu, Fang-Ching Tseng, Li-Chun Wang
Summary: The research aims to develop a personalized hybrid course recommendation system (PHCRS) based on human-centered AI in education, which assists students in selecting courses from different departments. The system integrates three recommendation methods, item-based, user-based, and content-based filtering, and optimizes the parameter weights using a genetic algorithm to improve prediction accuracy. The study collects course syllabi, tags courses from twelve departments, and trains the recommendation model using course tags, student records, and grades. Experimental results on 1490 courses selected by 5662 students show that item-based filtering has a higher influence on course recommendations. A genetic algorithm successfully finds the optimal solution and parameter settings. A questionnaire survey with 61 undergraduate students reveals that 83.60% of them are more interested in courses recommended at the top of the list, indicating autonomous motivation across the hybrid recommendation method. In conclusion, PHCRS can benefit all students by tuning optimal weights for course selection factors in each department, providing the best course combinations for reference.
EDUCATIONAL TECHNOLOGY & SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Bruno Galizia, Patrick Fiorenza, Corrado Bongiorno, Bela Pecz, Zsolt Fogarassy, Emanuela Schiliro, Filippo Giannazzo, Fabrizio Roccaforte, Raffaella Lo Nigro
Summary: This study demonstrates the growth of oriented AlN thin films on 4H-SiC substrates using PE-ALD technique, and investigates the impact of NH3 plasma pulsing on the microstructure and orientation degree of the AlN layers. The structural characterization reveals different polymorphic structures depending on the NH3 plasma pulsing time, and electrical nanoscopic characterization shows a correlation between the AlN crystalline phases and the insulating properties.
MICROELECTRONIC ENGINEERING
(2024)
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)
