Article
Chemistry, Multidisciplinary
Zi Hao Guo, Hai Lu Wang, Yangshi Shao, Longwei Li, Luyao Jia, Xiong Pu
Summary: This research reports a highly rectifying, temperature-tolerant, and flexible hydrogel ionic diode, which successfully solves the problem of existing ionic diodes. The experimental results show that the ionic diode has excellent resistance to high temperature and freezing, and the rectification ratio is significantly superior to previous reports. In addition, a flexible full-wave rectifier circuit is successfully fabricated, and its integration with the triboelectric nanogenerator provides an effective solution for biomechanical energy harvesting.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Applied
Jinsu Jung, Dongjoo Bae, Sungho Kim, Hee-Dong Kim
Summary: In this study, the self-rectifying resistive switching (RS) behavior was demonstrated in Ti/ZrN/Pt/p-Si resistive random access memory (RRAM) devices. The memory cell with a p-Si bottom layer showed a larger current ratio compared to conventional structures, and also exhibited a current-limited region in a low voltage region, potentially resulting in a diode-type RRAM with self-selecting properties. These results suggest that ZrN-based RRAM cells with a Pt/p-Si selector could realize a self-selecting RRAM cell without additional peripheral elements to suppress disturbances in reading operations.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Li-Ping Fu, Xiao-Qiang Song, Xiao-Ping Gao, Ze-Wei Wu, Si-Kai Chen, Ying-Tao Li
Summary: This paper demonstrates a memory device based on Pt/TiOx/W structure with self-rectifying property for WORM memory application. After programming, the devices exhibit excellent uniformity and remain permanently in the low resistance state. The potential application of TiOx-based WORM memory device in crossbar arrays is shown in the results.
Article
Physics, Applied
Huai-Yu Wang, Fei Cheng, Chao Gu
Summary: In this paper, an efficient electromagnetic rectifying metasurface (ERM) is proposed for wireless power transfer. The unit cell for the proposed ERM is composed of a cross-shaped energy capture structure that can absorb the electromagnetic power from the free space. The proposed ERM design has the merit of no extra matching circuit required, reducing size, complexity, and insertion loss. A prototype of a 4 x 4-element ERM was fabricated and measured, demonstrating an output power of up to 166 mW with an efficiency of 71.1% at a incident power density of 1050 mu W/cm(2). The polarization stability of the ERM was also verified with less than 10% efficiency reduction for different polarizations of the incident wave.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Kai-Uwe Demasius, Aron Kirschen, Stuart Parkin
Summary: Research on memcapacitive devices utilizing charge shielding principle for parallel multiply-accumulate operations offers a highly energy-efficient approach while ensuring high precision. Fabrication of a crossbar array and training a neural network with it demonstrates the potential for high energy efficiency and precision in implementing parallel multiply-accumulate operations.
NATURE ELECTRONICS
(2021)
Article
Energy & Fuels
Krzysztof Dziarski, Arkadiusz Hulewicz, Grzegorz Dombek, Lukasz Druzynski
Summary: This article discusses the indirect thermographic temperature measurement of a semiconductor diode D00-250-10. The methodology of selecting the measurement point, the method of thermographic measurement, and the simulation method of obtaining the die temperature are described. The experimental results show a small difference between the measured temperature and the die temperature.
Article
Chemistry, Multidisciplinary
Krzysztof Dziarski, Arkadiusz Hulewicz, Lukasz Druzynski, Grzegorz Dombek
Summary: Energy converters can provide electrical appliances with the necessary energy parameters. Rectifier bridges are used when direct current is needed, and these bridges are made using rectifier diodes. However, power diodes used in rectifier bridges and power converters can experience excessive junction temperatures. Research work was conducted to model and analyze the heat dissipation of a rectifier diode on a heat sink under forced convection conditions. The simulation results were compared with thermographic temperature measurements, and a method to determine the convection coefficient under forced convection conditions was presented. The difference between the simulation results and thermographic measurements was found to be 0.1 degrees C, depending on the power dissipated at the junction and the air velocity around the diode.
APPLIED SCIENCES-BASEL
(2023)
Review
Chemistry, Multidisciplinary
Sheng-Guang Ren, A-Wei Dong, Ling Yang, Yi-Bai Xue, Jian-Cong Li, Yin-Jie Yu, Hou-Ji Zhou, Wen-Bin Zuo, Yi Li, Wei-Ming Cheng, Xiang-Shui Miao
Summary: This article discusses the sneak path issue in in-memory computing architecture and the application of self-rectifying memristors in 3D integration. Self-rectifying memristors have high integration density and show good power consumption and scalability. The article also introduces the applications of self-rectifying memristors in 3D memory, IMC, neuromorphic computing, and hardware security, and discusses the challenges and potential solutions at the device and system levels.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yoon Ho Jang, Janguk Han, Jihun Kim, Woohyun Kim, Kyung Seok Woo, Jaehyun Kim, Cheol Seong Hwang
Summary: This study maps non-Euclidean graphs to a specific crossbar array (CBA) and uses the sneak current in the CBA to identify the similarity function between nodes. The sneak-current-based function can be used to predict future connectivity, community connections, and neural connections in the brain.
ADVANCED MATERIALS
(2023)
Article
Mechanics
Zhengxian Liu, Qifeng Li, Xin Lan, Wenfeng Bian, Liwu Liu, Sida Hao, Yanju Liu, Jinsong Leng
Summary: This study investigated the structural and dynamic analysis of an SMPC flexible solar array system, verifying its structural strength and reliability through numerical simulations and experiments. The successful launch of the SMPC-FSAS on the SJ-20 geostationary satellite further confirmed its safety and reliability for future design of ultra-large flexible solar arrays.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Seok-Kyu Cho, Kyeong-Seok Oh, Jong Chan Shin, Ji Eun Lee, Kyung Min Lee, Junbeom Cho, Won Bo Lee, Sang Kyu Kwak, Minjae Lee, Sang-Young Lee
Summary: A new class of quasi-solid-state single lithium-ion conductors based on anion-rectifying semi-interpenetrating polymer networks has been developed, featuring fast Li+ migration via surface charge and suppression of anion-triggered side reactions with Li-metal anodes. This innovative approach improves rate performance and cycling retention of Li-metal cells compared to those based on traditional liquid electrolytes.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Harshada Patil, Shania Rehman, Honggyun Kim, Kalyani D. Kadam, Muhammad Asghar Khan, Karim Khan, Jamal Aziz, Muhammad Ismail, Muhammad Farooq Khan, Deok-kee Kim
Summary: This study demonstrates the nonvolatile and synaptic characteristics of ferroelectric-semiconductor heterojunction-based devices, where the growth temperature of the ferroelectric layer plays a crucial role in resistive switching. At 550 degrees C, enhanced resistive switching and neuromorphic applications are achieved with good recognition accuracy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Taegyun Park, Seung Soo Kim, Byeol Jun Lee, Tae Won Park, Hae Jin Kim, Cheol Seong Hwang
Summary: This article introduces a self-rectifying memristor with electronic bipolar resistive switching, which has electroforming-free, highly rectifying properties and low operating power. By configuring the memristors in a vertical array structure, a higher memory density can be achieved compared to a planar array structure. These advantages can be utilized in in-memory computing to provide a new and efficient stateful logic gate with high parallelism. The different switching mechanism is explained and exploited to realize the AND and OR Boolean logic gates.
Article
Multidisciplinary Sciences
Guo-Xin Zhang, Zhi-Cheng Zhang, Xu-Dong Chen, Lixing Kang, Yuan Li, Fu-Dong Wang, Lei Shi, Ke Shi, Zhi-Bo Liu, Jian-Guo Tian, Tong-Bu Lu, Jin Zhang
Summary: This research develops retinomorphic vision sensors with nonvolatile tunable responsivity using an ion-induced localized-field strategy, and constructs a complete neuromorphic visual system with front-end in-sensor computing and back-end in-memory computing.
Article
Optics
Na Li, Chi Zhao, Xiangyang Li, Pengchao Zhao, Bin Zheng, Geting Gao
Summary: This paper presents the design of a wideband metal rectifying antenna based on a concave bow tie structure with an optimized absorption efficiency of 94.6% within the wavelength range of 400 nm-1600 nm. The experiment verifies a photoelectric conversion efficiency of 5.14 x 10-9.
OPTICS COMMUNICATIONS
(2023)
Review
Polymer Science
Gopinath Kasi, Sathishkumar Gnanasekar, Kai Zhang, En Tang Kang, Li Qun Xu
Summary: This review discusses the recent advancements and potential of polyurethane (PU) composites for antibacterial applications. By incorporating fillers into the PU matrix, the resulting products exhibit unique and improved physicochemical properties. The bactericidal ability of PU composites depends on their surface composition, morphology, charge, and stability.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Peng Liu, Ping Huang, En-Tang Kang
Summary: This study introduces a novel dextran-based drug delivery system that exhibits pH sensitivity during cancer chemotherapy. Experimental results show that the system has good biocompatibility and anti-tumor effects in vitro, while in vivo studies demonstrate its effectiveness in inhibiting tumor growth with minimal weight loss.
Review
Chemistry, Multidisciplinary
Zhangyong Si, Wenbin Zheng, Dicky Prananty, Jianghua Li, Chong Hui Koh, En-Tang Kang, Kevin Pethe, Mary B. Chan-Park
Summary: The increasing prevalence of antimicrobial drug resistance in pathogenic bacteria poses a critical threat to global health. Cationic polymers, which target bacterial membranes, are seen as the last frontier in antibacterial development due to their low propensity for resistance and rapid bactericidal effect. Advanced antimicrobial cationic polymers show promise for overcoming bacterial membrane-related resistance mechanisms and may be useful for future therapeutic applications.
Review
Materials Science, Biomaterials
Gnanasekar Sathishkumar, Kasi Gopinath, Kai Zhang, En-Tang Kang, Liqun Xu, Yunlong Yu
Summary: Medical devices and surgical implants are essential in tissue engineering and regenerative medicine. However, biofouling and microbial colonization on the implant surface remain major concerns. Tannic acid (TA) is a polyphenol that can be used to functionalize medical substrates, inhibiting microbial adhesion and colonization. This review focuses on recent advancements in TA-based bioinspired universal surface coating technologies and their applications in antifouling and antibacterial purposes.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Biophysics
Yan Wang, Xiaodong He, Yanfang Cheng, Lin Li, Kai Zhang, En-Tang Kang, Liqun Xu
Summary: This study developed a surface modification strategy using PVA-PPy NPs and TA to create a Ti-TPP surface that can reduce bacterial adhesion. The Ti-TPP surface also exhibited photothermal property and could kill bacteria through hyperthermal effect under near-infrared irradiation, while preventing early-stage biofilm formation.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Engineering, Environmental
Xiaodong He, Jieyu Zhang, Liwei Xie, Gnanasekar Sathishkumar, Chunmei Li, Xi Rao, Jing Zhao, Kai Zhang, Rui Wang, En-Tang Kang, Liqun Xu
Summary: This study investigated a simplified method for supramolecular assembly of natural bio compounds to develop functional coating layers. The coating exhibited antibacterial, anticorrosive, and biocompatible properties, and promoted endothelial cell proliferation. In addition, the coating demonstrated effective anti-fogging performance. The one-step co-deposition method provided a simple, environmentally benign, and sustainable approach for designing and fabricating multifunctional surfaces.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Sneha Sree Mullapudi, Juwita Norasmara Rahmat, Ratha Mahendran, Yew Koon Lim, Lee Ting Ong, Kah Ying Wong, Edmund Chiong, En -Tang Kang, Koon Gee Neoh
Summary: A nanocarrier based on human serum albumin was developed for targeted therapy of bladder cancer cells, showing significant antitumor effects in a mouse model. It also exhibited efficient fluorescence targeting in the urine of BC patients, serving as a therapeutic and diagnostic tool for NMIBC management.
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
(2022)
Article
Chemistry, Multidisciplinary
Yanfang Cheng, Jie Tang, Xiaodong He, Gnanasekar Sathishkumar, Yan Wang, Kai Zhang, Xi Rao, En-Tang Kang, Li-Qun Xu
Summary: This study develops an antibacterial coating for biomedical materials/devices by immobilizing glucose oxidase using tannic acid. The coating shows strong antibacterial activity against Escherichia coli and Staphylococcus aureus by enzymatically converting glucose to antibacterial substances. It also effectively resists biofilm formation. In vitro and in vivo studies confirm its safety.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Biophysics
Jie Tang, Yanfang Cheng, Tao Huang, Yang Wang, Kai Zhang, En-Tang Kang, Liqun Xu
Summary: This study demonstrates a one-pot fabrication method for antifouling coatings based on the simultaneous surface adhesion of trihydroxyphenyl and dihydroxyphenyl moieties of tannic acid (TA) derivative and covalent conjugation of hydrophilic poly(2-methyl-2-oxazoline) (PMOXA). The surface hydrophilicity and deposition universality on various substrates were investigated, and the anti-bacterial, anti-platelet adhesion, and anti-biofilm formation abilities of the coating were studied. In vitro hemolysis and cytotoxicity, as well as in vivo biocompatibility, were evaluated. The results indicate that the TA/PMOXA-based coating can be used as an antifouling additive on biomedical implants and devices.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Materials Science, Coatings & Films
Zilin Chen, Xu Liu, Zhe Cheng, Xiaodong Tan, Yunjie Xiang, Jing Li, Yongping Zhang, Zhisong Lu, En-Tang Kang, Liqun Xu, Xi Rao
Summary: A ZnO/Zn(OH)(2) hybrid coating was fabricated on pure Zn surface through plasma electrolytic oxidation (PEO) to investigate the effect of PEO treatment on the degradation behavior of Zn and Zn-based materials. The degradation effects were studied through immersion tests in simulated body fluid (SBF) and Hank's solution. The results showed that PEO treatment accelerates the degradation of Zn and the corrosion products mainly consist of Zn(OH)(2), ZnO, Zn-3(PO4)(2), and Ca-P matters. PEO-treated Zn exhibited good in vitro biocompatibility and enhanced antibacterial properties, making it promising for orthopedic implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Kai Zhang, Xiaojuan Lei, Caiqing Mo, Jin Huang, Ming Wang, En-Tang Kang, Liqun Xu
Summary: High indoor humidity/temperature have negative impacts on public health and industrial productivity, while traditional air conditioning systems consume significant energy and contribute to the greenhouse effect. This study presents an asymmetric bilayer cellulose-based fabric that enables solar-driven dehumidification, transpiration-driven power generation, and passive radiative cooling without any energy input. The fabric demonstrates high moisture absorption and evaporation rates, reducing indoor humidity to a comfortable level under sunlight. The evaporation-driven capillary flow generates a maximum open-circuit voltage of 0.82 V and a power density of 1.13 mu W cm(-3). Moreover, the fabric achieves subambient cooling of approximately 12 degrees C and an average cooling power of approximately 106 W m(-2) under radiation of 900 W m(-2). This work opens up possibilities for developing high-performance environmentally friendly materials for sustainable moisture/thermal management and self-powered applications.
Article
Chemistry, Multidisciplinary
Xiaodong He, HuaJun Wu, Yan Wang, Yunjie Xiang, Kai Zhang, Xi Rao, En-Tang Kang, Liqun Xu
Summary: Surface modification is crucial for tailoring the functionalities of solid materials. In this study, a simple and universal surface modification method based on phytic acid (PA) is developed, which introduces antimicrobial function through the adhesion and electrostatic interaction of PA. The modified surfaces exhibit strong antibacterial performance due to the synergistic bactericidal effects of cationic polymers (CPs) and photothermal effect caused by Prussian blue nanoparticles (PB NPs). The PA-PB-CP coating disturbs the membrane integrity, enzymatic activity, and metabolism function of bacteria, leading to the elimination of adhered bacteria.
Review
Engineering, Biomedical
Sathishkumar Gnanasekar, Gopinath Kasi, Xiaodong He, Kai Zhang, Liqun Xu, En-Tang Kang
Summary: This review assesses recent advancements in polymer-photosensitizer hybrid materials developed for antibacterial photodynamic therapy (APDT) applications. The review discusses the integration and functionalization of photosensitizers with polymers, the use of photosensitizer coatings to eliminate healthcare-associated infections, and the application of photosensitizers in films, scaffolds, and hydrogels for regenerative medicine.
BIOACTIVE MATERIALS
(2023)
Article
Engineering, Biomedical
Ziyi Wu, Tao Huang, Gnanasekar Sathishkumar, Xiaodong He, Huajun Wu, Kai Zhang, Xi Rao, En-Tang Kang, Liqun Xu
Summary: A simple and eco-friendly method of phytic acid-promoted exfoliation of black phosphorus nanosheets (PA@BP NSs) is developed. The resultant PA@BP NSs are conjugated with cationic polyquaternium-2 (PQ), leading to the formation of PA-BP-PQ composite coatings on the polydimethylsiloxane surface. The PA-BP-PQ composite coating exhibits remarkable bi-modal (contact-killing and photothermal) antimicrobial therapy with good biocompatibility both in vitro and in vivo.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Materials Science, Biomaterials
Lin Li, Yan Wang, Tao Huang, Xiaodong He, Kai Zhang, En-Tang Kang, Liqun Xu
Summary: The emergence of antibiotic drug resistance has led to the development of alternative strategies such as antibacterial photodynamic therapy (APDT). In this study, cationic porphyrin-based nanoparticles (NPs) were prepared and shown to have intrinsic antibacterial properties against Gram-positive bacteria. These NPs also exhibited good hemocompatibility and low cytotoxicity.
BIOMATERIALS SCIENCE
(2022)
