Article
Engineering, Electrical & Electronic
Amira Ali, Abdelsattar M. Sallam, M. Mohsen, Amal Kasry, Sameh O. Abdellatif
Summary: Cardiovascular diseases are responsible for the largest number of deaths globally, with over 17 million people dying each year. In this study, researchers have developed a highly sensitive biosensor using a polyaniline nanofiber organic field effect transistor (OFET) for the detection of the regulatory protein cTnI, which is released into the blood following heart muscle injury. The OFET demonstrated high sensitivity and a low detection limit, making it a promising tool for detecting myocardial infarction.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Douglas Henrique Vieira, Gabriel Leonardo Nogueira, Mayk Rodrigues Nascimento, Lucas Fugikawa-Santos, Neri Alves
Summary: Charge-trap memory phenomena can be observed in an electrolyte-gated transistor (EGT) with a spray-coated zinc oxide (ZnO) active layer and a cellulose-based electrolyte. The EGT exhibits efficient programming and erasing characteristics at low voltages, which can shift the threshold voltage and the oncurrent magnitude. This behavior is attributed to the charged trapping states at the ZnO/electrolyte interface and within the ZnO bulk.
CURRENT APPLIED PHYSICS
(2023)
Article
Materials Science, Ceramics
Kelin Hu, Feipeng Wang, Yuyang Yan, Hongcheng Liu, Zijia Shen
Summary: A novel hybrid structure of Pd doped ZnO/SnO2 heterojunction nanofibers with hexagonal ZnO columns was successfully synthesized in a single step from electrospun precursor nanofibers. The structure exhibited excellent hydrogen gas sensing properties at low temperature, with high response to H2 gas, rapid response/recovery times, good selectivity, and excellent linearity. Characterization of the materials was done using XRD, FESEM, HRTEM, XPS, and synthesis mechanism and gas sensing mechanism were proposed.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Yufeng Xia, Gang He, Wenhao Wang, Qian Gao, Yanmei Liu
Summary: High-quality indium oxide nanofibers were obtained via electrospinning and investigated for their properties. Optimized electrospinning time improved the electrical performance of field-effect transistors, while a high-k dielectric layer significantly reduced operating voltage and enhanced stability.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Chemistry, Physical
Xiaoyan Li, Na Yang, Xuanao Fang, Wei Zhang, Jiming Yao, Jianlin Xu, Kaili Song
Summary: Flexible supercapacitors with self-supported nanofiber electrodes are synthesized using a coaxial electrospinning method. The electrodes consist of a polycaprolactone (PCL) core, a Na-MnO2 sheath, and acid-modified carbon nanotubes (CNTs). These electrodes exhibit high capacitance and wide electrochemical voltage range, providing potential for wearable energy storage applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Nanoscience & Nanotechnology
Wenhui Fu, Jun Li, Linkang Li, Dongliang Jiang, Wenqing Zhu, Jianhua Zhang
Summary: A new strategy utilizing electrospun Li0.33La0.557TiO3 nanofibers to enhance ion transport pathway in polymer-based solid electrolytes was proposed in order to improve the performance of flexible synaptic transistors. The study successfully simulated various synaptic neuron functions using flexible InZnO synaptic transistors with Li0.33La0.557TiO3 nanofibers-based solid electrolytes, presenting a significant attempt in developing high-performance synaptic transistors.
Article
Nanoscience & Nanotechnology
Jun Li, Wenhui Fu, Yuxing Lei, Linkang Li, Wenqing Zhu, Jianhua Zhang
Summary: This study proposes a new sensing idea by inducing and activating the synaptic properties of transistors through adjusting the oxygen vacancy. It combines gas detection with synaptic memory and learning, overcoming the separation between synaptic transistors and sensors and reducing production cost. By simulating the response of human olfactory synapses to target gas, a novel nanofiber field-effect transistor is successfully fabricated.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Alexandre Bachelet, Marion Chabot, Abduleziz Ablat, Kazuo Takimiya, Lionel Hirsch, Mamatimin Abbas
Summary: Charge injection/blocking layers are important in organic electronic devices, but their use in organic light emitting transistors has been limited by high operating voltages. In this study, two hole blocking molecules were integrated into light emitting transistors, resulting in improved optical performance at lower operating voltages. However, the choice of molecule for charge injection can also impact device performance.
ORGANIC ELECTRONICS
(2021)
Article
Polymer Science
Dandan Zhang, Xiuli Zhang, Xingjia Li, Huiping Wang, Xiaodong Sang, Guodong Zhu, Yuhei Yeung
Summary: A unique and highly flexible piezoelectric nanogenerator based on bismuth chloride (BiCl3)/zinc oxide (ZnO)/poly(vinylidene fluoride) (PVDF) nanofibers was prepared using electrospinning technique. It exhibited excellent performance as a highly sensitive self-powered sensor and could detect vital signals.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Nurul Zahirah Noor Azman, Wan Faihanah Irwaty Wan Mohamed, Ramzun Maizan Ramli
Summary: In this study, n-ZnO/n-Bi2O3/epoxy-PVA nanofiber mats were fabricated using electrospinning. The X-ray attenuation capability and filler dispersion were investigated. The results showed that the nanofiber mat with 20 wt% n-ZnO had the best X-ray attenuation capabilities. Further research is needed to improve the characteristics of the nanofiber mats.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Physical
Guangjian Tian, Zongwang Huang, Haidong Wang, Chunhong Cui, Yi Zhang
Summary: The use of breath protective equipment is crucial for personal health protection against air contamination and bacterial infection. Through modification with nanoparticles, nanofibers used as core filter layer materials in face masks can exhibit multifunctionality, including particulate matter filtration and bacterial inhibition. The HNTs-ZnO/PCL nanofiber membranes developed in this study show high antibacterial efficiency and improved particle filtration performance, making them a promising material for antibacterial protective mask filter layers.
APPLIED CLAY SCIENCE
(2022)
Article
Materials Science, Textiles
Il Jae Lee, Yo Sub Park, Chae Won Park, Doo Hyun Baik
Summary: PI nanowebs were prepared by electrospinning with various process variables, and then subjected to hot drawing to enhance the alignment of nanofibers. Analysis confirmed that high-speed collecting rollers and hot drawing could significantly improve the tensile strength of PI nanowebs.
FIBERS AND POLYMERS
(2022)
Article
Nanoscience & Nanotechnology
Pingping Yu, Weiwei Wang, Tianxu Zheng, Xi Wan, Yanfeng Jiang
Summary: The self-powered ZnO nanofiber array/BaTiO3 photodetector fabricated through electrospinning method shows improved photocurrent and switch ratio, enabling its practical applications in a wide temperature range. This device can detect weak signals at low power intensity with a wide temperature range of 0-100 degrees C under 0 V bias.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Leitao Cao, Xi Yu, Xia Yin, Yang Si, Jianyong Yu, Bin Ding
Summary: Composite nanofiber aerogels with a hierarchical maze-like structure show enhanced low-frequency sound absorption capability compared to traditional fiber aerogels. They offer excellent sound absorption performance, lightweight properties, and robust mechanical properties, making them a potential choice for sound absorption applications in vehicles, buildings, and indoor environments.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Lan Zhou, Hang Yu, Md Yamin Hossain, Fen Chen, Chunhui Du, Guoqing Zhang
Summary: An asymmetric integrated ESNF Supporting Layer is constructed by introducing photothermal materials PANI and using in situ photothermal annealing, which solves the problem that high surface roughness and large pore size of ESNF affect the formation of polyamide layers. The NTFC-FO membrane prepared by this strategy has highly selective polyamide layer, low membrane structural parameter (S), high water flux, low reverse salt flux, and also exhibits excellent rejection to dye wastewater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Optics
Chang Liu, Shuimei Ding, Qianlei Tian, Xitong Hong, Wanhan Su, Lin Tang, Liming Wang, Mingliang Zhang, Xingqiang Liu, Yawei Lv, Johnny C. Ho, Lei Liao, Xuming Zou
Summary: This study proposes a new device that combines optoelectronic memory and a detector, allowing for switchable functions. The device has long storage time, high on/off ratio, and excellent multi-bit storage in the memory mode. In the detector mode, it exhibits fast response, impressive responsivity, and self-driven broadband detection. Additionally, the device has the ability to quickly resolve polarization in the near-infrared range.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Yu Bu, Xu Wang, Xiuming Bu, Zhengyi Mao, Zhou Chen, Zebiao Li, Fengqian Hao, Johnny C. Ho, Jian Lu
Summary: Achieving high strength, deformability and toughness in polymers is a challenging task. This study introduces a self-assembling nacre-like polymer composite that exhibits extremely high toughness and increased strength. The composite demonstrates remarkable mechanical properties, surpassing previously reported values for polymer composites.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
You Meng, Yuxuan Zhang, Zhengxun Lai, Wei Wang, Weijun Wang, Yezhan Li, Dengji Li, Pengshan Xie, Di Yin, Dong Chen, Chuntai Liu, SenPo Yip, Johnny C. Ho
Summary: Converting vapor precursors to solid nanostructures via a liquid noble-metal seed is a common vapor deposition principle. However, such a noble-metal-seeded process is excluded from the crystalline halide perovskite synthesis, mainly hindered by the growth mechanism shortness. In this work, the Au-seeded CsPbI3 nanowires growth is realized based on a vapor-liquid-solid (VLS) growth mode powered by a spontaneous exothermic nucleation process, contributing to outstanding photodetector performances.
Article
Multidisciplinary Sciences
You Meng, Xiaocui Li, Xiaolin Kang, Wanpeng Li, Wei Wang, Zhengxun Lai, Weijun Wang, Quan Quan, Xiuming Bu, SenPo Yip, Pengshan Xie, Dong Chen, Dengji Li, Fei Wang, Chi-Fung Yeung, Changyong Lan, Chuntai Liu, Lifan Shen, Yang Lu, Furong Chen, Chun-Yuen Wong, Johnny C. Ho
Summary: The authors explore the unique multi-scale van der Waals interactions in one-dimensional tellurium systems to overcome the restrictions imposed by chemical bonds. They succeed in synthesizing wafer-scale van der Waals nanomeshes composed of self-welding Te nanowires on various substrates at a low temperature, which exhibit improved transport and photoelectric properties. These Te vdWs nanomesh electronics hold great promise in meeting emerging technological demands.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Shiyuan Liu, Junchen Liao, Xin Huang, Zhuomin Zhang, Weijun Wang, Xuyang Wang, Yao Shan, Pengyu Li, Ying Hong, Zehua Peng, Xuemu Li, Bee Luan Khoo, Johnny C. C. Ho, Zhengbao Yang
Summary: A van der Waals stripping method is introduced to fabricate large-area and freestanding piezoceramic thin films in a simple, green, and cost-effective manner. The water-based stripping film method shows low energy consumption and low pollution, making it suitable for various applications such as micro energy harvesting and Covid-19 spike protein detection.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Physical
Shu-Chi Wu, Zhengxun Lai, Ruoting Dong, Shin-Yi Tang, Kuangye Wang, Tzu-Yi Yang, Ying-Chun Shen, Hsiang-Ju Liao, Teng-Yu Su, Chiou-Ru Cheng, Yuanfei Ai, Yu-Ze Chen, Yi-Chung Wang, Ling Lee, Yi-Jen Yu, Johnny C. Ho, Yu-Lun Chueh
Summary: Recent advances in the use of organic-inorganic hybrid perovskites have been investigated for various applications, such as solar cells, photodetectors, light-emitting devices, and lasers. The perovskite structure can host extrinsic elements, making it a promising candidate for battery applications. Previous studies have shown the suitability of organic-inorganic hybrid perovskites as anode materials for lithium-ion and sodium-ion batteries.
Article
Chemistry, Physical
Zhengxun Lai, Yuxuan Zhang, You Meng, Xiuming Bu, Wei Wang, Pengshan Xie, Weijun Wang, Chuntai Liu, SenPo Yip, Johnny C. Ho
Summary: This study reports a new type of electrode, metalloid electrode, which is more stable than conventional noble metals as electrical contacts for halide perovskites. The degradation mechanism of noble metal electrodes compared to metalloid electrodes is investigated, and it is found that noble metals are prone to halogenation in halide perovskites, while metalloid electrodes remain intact after long-term storage. Furthermore, the long-time operation stability of perovskite devices with metalloid electrodes is higher than that of noble metals. First-principles calculations confirm the exceptional stability of metalloid electrodes.
Article
Chemistry, Physical
Yezhan Li, Zhengxun Lai, You Meng, Wei Wang, Yuxuan Zhang, Xuwen Zhao, Di Yin, Weijun Wang, Pengshan Xie, Quan Quan, SenPo Yip, Johnny C. Ho
Summary: Organic-inorganic halide perovskite is a low-cost and solution-processable material with remarkable optoelectronic properties, making it an ideal candidate for high-performance photodetectors and reduce device costs.
JOURNAL OF MATERIOMICS
(2023)
Article
Nanoscience & Nanotechnology
Yunpeng Xia, Jiajia Zha, Haoxin Huang, Huide Wang, Peng Yang, Long Zheng, Zhuomin Zhang, Zhengbao Yang, Ye Chen, Hau Ping Chan, Johnny C. C. Ho, Chaoliang Tan
Summary: This study explores the effect of different crystal phases of MoTe2 as the charge-trapping layer in 2D van der Waals heterostructure-based flash memory devices. It is found that the device based on MoS2/h-BN/1T'-MoTe2 exhibits better performance than the device based on MoS2/h-BN/2H-MoTe2, including a larger memory window, faster switching speed, and higher extinction ratio. This research demonstrates that the crystal phase of 2D TMDs has a significant impact on the performance of nonvolatile flash memory devices based on 2D vdW heterostructures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zhengxun Lai, Zixin Zeng, You Meng, Yuxuan Zhang, Yi Shen, Wei Wang, Dengji Li, Dong Chen, Di Yin, Sai-Wing Tsang, SenPo Yip, Johnny C. Ho
Summary: A facile slow-evaporating solvent method is demonstrated to synthesize high-quality organic-inorganic halide perovskite films. Compared with the conventional spin-coating method, the films fabricated by this method show higher crystallinity, oriented lattice, smoother surface morphology, and lower trap density. The photodetector manufactured with this method-based film also performs better than those by the spin-coating method.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Di Yin, Dong Chen, Yuxuan Zhang, Weijun Wang, Quan Quan, Wei Wang, You Meng, Zhengxun Lai, Zhe Yang, SenPo Yip, Chun-Yuen Wong, Xiuming Bu, Xianying Wang, Johnny C. C. Ho
Summary: Electrochemically converting waste nitrate (NO3-) into high-value-added ammonia (NH3) is challenging due to the multistep electron transfer and complex intermediates involved. In this study, Cu2O/NiO heterostructure electrocatalyst was synthesized and proven to efficiently produce NH3. The obtained Cu2O/NiO, induced by the electrochemically-driven phase conversion, acts as the active phase, modulating interfacial charge distribution and reducing the overpotential. The tandem system achieved a NH3 Faradaic efficiency of 95.6% and a super-high NH3 selectivity of 88.5% at an ultralow reaction voltage.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sen Zhang, Pingdan Xiao, Xitong Hong, Ruohao Hong, Chang Liu, Qianlei Tian, Wanhan Su, Chao Ma, Xingqiang Liu, Kenli Li, Johnny C. Ho, Yawei Lv, Qinghui Hong, Lei Liao, Xuming Zou
Summary: This study demonstrates a flexible artificial vision system integrated with optical perception, computation, and learning functionalities using SnO optoelectronic synaptic transistor-based event-driven vision sensors. The SnO transistors with HfO2 passivation layer exhibit gate-tunable bidirectional photoresponse behavior, simulating the neurobiological functionalities of bipolar cells. The multilayer neural network learning circuit built from these transistors achieves high recognition accuracy and noise reduction.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
You Meng, Weijun Wang, Wei Wang, Bowen Li, Yuxuan Zhang, Johnny Ho
Summary: This article reviews the advances in anti-ambipolar heterojunctions and highlights their significance in materials, devices, circuits, and broad-scale research.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Jiajia Zha, Handa Liu, Huide Wang, Siyuan Li, Haoxin Huang, Yunpeng Xia, Chen Ma, Peng Yang, Zhuomin Zhang, Zhengbao Yang, Ye Chen, Johnny C. C. Ho, Chaoliang Tan
Summary: A plasma-optimized contact strategy was reported to improve the performance of PdSe2 nanoflake-based field-effect transistors (FETs).
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Rui Zhang, Zhuojun Yang, Liwen Liu, Jie Lin, Shaofeng Wen, You Meng, Yi Yin, Changyong Lan, Chun Li, Yong Liu, Johnny C. Ho
Summary: This study reports highly sensitive, broadband, and flexible PdSe2 thin film photodetectors on PI substrates that can detect light from UV to infrared regions. The devices with thick PdSe2 films exhibit good performance, with a responsivity of 37.6 mA W-1 at 1550 nm and a fast response time. The thin PdSe2 film shows both positive and negative photoresponses in the infrared region, and the negative photoresponse in the UV to VIS region is attributed to charge transfer-related adsorption-desorption of gas molecules.
ADVANCED OPTICAL MATERIALS
(2023)