Article
Chemistry, Multidisciplinary
Piyawan Paisrisarn, Takao Yasui, Zetao Zhu, Annop Klamchuen, Panita Kasamechonchung, Tuksadon Wutikhun, Visittapong Yordsri, Yoshinobu Baba
Summary: This study investigated the effect of crystallinity and morphology of ZnO nanowires on the capture efficiency of EVs, important biomarkers of cancer. The results showed that both the crystallinity and morphology of the nanowires played a role in improving the EV capture performance.
Article
Chemistry, Multidisciplinary
Yi Li, Xiaojing Wei, Qiuyue Yang, Jie Zhang, Wencai Wang, Linlin Dong, Bokai Gao, Chen Li, Xiaolin Sun, Yanwen Ma
Summary: In this work, self-powered flexible transparent ultraviolet (UV) photodetectors with fast response speed, high transparency, and excellent mechanical stability are reported. The device is based on a CuO/ZnO nanowire array heterojunction on a Cu NW backbone. It exhibits a rise time of 16 ms, a decay time of 17 ms, a photocurrent/dark current ratio of 392, and a transparency of 80%. Furthermore, the device retains good photoresponse performance even after 10,000 bending cycles, demonstrating its superior mechanical stability.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Agnieszka Fiszka Borzyszkowska, Agnieszka Sulowska, Pawel Czaja, Aleksandra Bielicka-Gieldon, Ivar Zekker, Anna Zielinska-Jurek
Summary: This study successfully synthesized multi-doped carbon dots (xCDs) with excellent fluorescence properties from microalga Chlorella pyrenoidosa using simple hydrothermal and microwave-assisted methods. The nonmetal doping in the nanomaterials was confirmed by XPS, while the existence of metals in the CDs was confirmed by ICP-OES and TEM, with Mg, Ca, K, and Na being the dominant doped metals. The synthesized xCDs were used for the modification of ZnO, and their photocatalytic properties were evaluated, showing promising potential for the degradation of carbamazepine.
Article
Chemistry, Multidisciplinary
Huiqin Zhou, Anlin Feng, Shanshan Ji, Yidong Hu, Qingyang Li
Summary: A ZnO nanowire array was synthesized within 10 minutes for the first time through electrodeposition of a Zn nanocrystal coating followed by a microwave hydrothermal treatment, offering the cheapest and fastest route from aqueous solutions so far. This simple, economical, efficient, flexible, and scalable method has promising prospects for industrial applications.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Malkeshkumar Patel, Ji Heun Seo, Sangho Kim, Thanh Tai Nguyen, Manjeet Kumar, Juhyung Yun, Joondong Kim
Summary: This study introduces a photovoltaic-powered transparent heater system using silver nanowire networks to generate heat via the Joule effect. The ZnO coating not only enhances stability but also maintains the optical transparency of the heater.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Shunhang Wei, Shufang Chang, Fan Yang, Zhengping Fu, Gang Liu, Xiaoxiang Xu
Summary: Stable and efficient photoelectrochemical water splitting has been achieved by utilizing a BaTaO2N photoanode decorated with CoO microflowers. The CoO microflowers effectively collect holes to protect BaTaO2N against photocorrosion, resulting in a Faraday efficiency of almost unity for O-2 evolution reactions. The tips of the CoO microflowers are identified as the most active sites for water oxidation reactions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Haitao Wang, Zhongyu Hou, Changlin Li, Bo Wang
Summary: Research in plasma actuation is focusing on enhancing thrust density for aerodynamic flow control. A new method involving nanoscaled structures and voltage/frequency tuning has been proposed and experimentally evaluated. Results show a 78% increase in thrust with nanostructures, but a threshold effect with lower voltages and frequencies impacting thrust generation. Electric characteristics are not sensitive to nanostructures, demonstrating the effectiveness of incorporating nanoscaled structures into DBD plasma actuators to improve mechanical performance.
Article
Nanoscience & Nanotechnology
Jian-Fu Tang, Yi-Da Sie, Zong-Liang Tseng, Ja-Hon Lin, Lung-Chien Chen, Cheng-Liang Hsu
Summary: In this study, a photodetector and humidity sensor based on zinc oxide nanowires (ZnO NWs) with CsPbBr3 perovskite quantum dots (PQDs) were developed. The excellent optoelectronic properties of PQDs make them ideal for semiconductor sensors. The experimental results showed that the performance of PQD/ZnO NWs was superior to that of ZnO NWs, especially in terms of humidity response and photocurrent.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mei Liu, Mengfan He, Lingdi Kong, Aristide Djoulde, Xinyue Liu, Weilin Su, Pengfei Zhao, Xin Bai, Jinbo Chen, Jinjun Rao, Zhiming Wang
Summary: In this study, a micro-sized renewable energy source based on a single zinc oxide nanowire (ZnONW) was introduced to power multiple common bulk sensors. By manipulating and deforming a single suspended ZnONW using a nanomanipulator within a scanning electron microscope, the piezoelectric properties of the ZnONW were studied.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yuxiao Zheng, Xueying Xu, Fengrui Li, Weilin Chen, Jian Gong, Chunlei Wang
Summary: This work presents a transparent photodetector based on binary metal oxides, where the addition of polyoxometalate (POM) modified ZnO NWs in the top layer increases UV absorption and creates an interlayer p-n junction, achieving high transparency and efficient photodetection capabilities.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Se-Yong Park, Soon-Ho Rho, Hwan-Seok Lee, Kyoung-Min Kim, Hee-Chul Lee
Summary: Porous films of metals and metal oxides have gained attention due to their larger surface areas and higher reactivities. This study utilized a modified direct current magnetron sputtering method to form porous Zn-ZnO composite films, followed by a wet post-oxidation process to fabricate pure porous ZnO films. Optimal conditions for forming the composite films included an oxygen ratio of 0.3% in the argon gas flow and a process pressure of 14 mTorr. The resulting porous ZnO films had 26% porosity when oxidized at 500°C for 5 minutes.
Article
Engineering, Electrical & Electronic
Yicong Chen, Yu Zhang, Juncong She, Shaozhi Deng, Jun Chen
Summary: In this work, a model was established to study the transient emission current and temperature distribution of individual nanowires during pulsed field emission. Factors influencing the maximum transient emission current were investigated, and guidelines for improving the emission current in different applications were given. This study provides important insights for designing quasi-one-dimensional nanowire field emitter arrays.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Optics
Xiaomiao Fei, Dayong Jiang, Man Zhao
Summary: Recent studies have shown that nanostructures have a significant gain effect on the performance of photodetectors (PDs). In this study, Cu2O and ZnO films were prepared using electrochemical and magnetron sputtering methods, respectively, and ZnO nanowire arrays (NWAs) were grown on Cu2O/ZnO PDs using a hydrothermal method. The introduction of ZnO nanowires effectively improved the responsivity and light absorption of the Cu2O/ZnO PD by about 16 times. The ZnO nanowires also enhanced the detection sensitivity of the Cu2O/ZnO/ZnO NWs PD by nearly 5 times, demonstrating their remarkable improvement for heterojunction PDs.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Hue Thi Nguyen, Tuyet Nhung Pham, Le Thi Le, Tien Khi Nguyen, Anh-Tuan Le, Tran Quang Huy, Thuy Thi Thu Nguyen
Summary: This study introduces the bioformulations of Ag/BBR and ZnO/BBR complexes against pathogenic bacteria in the gastrointestinal tract. The presence of BBR significantly influenced the nanoparticle growth, resulting in the formation of core/shell structured Ag/BBR and ZnO/BBR NPs with small particle sizes. The antibacterial test showed that BBR, Ag, or ZnO components all contributed to the increase of antibacterial ability of Ag/BBR and ZnO/BBR NPs against both methicillin-resistant Staphylococcus aureus (MRSA) and Salmonella enteritidis (S. enteritidis).
Article
Chemistry, Multidisciplinary
Hajar Ghannam, J. P. B. Silva, Adil Chahboun
Summary: By synthesizing zinc oxide nanowires of different lengths, the relationship between surface morphology and electrochemical performance was studied, with the finding that increasing the length of the nanowires contributes to a decrease in electrochemical performance. A new strategy combining nanowires and microsheets was proposed to improve the morphology for enhanced electrochemical performance.
Article
Engineering, Electrical & Electronic
Xiaojie Li, Chuan Liu, Jiaquan Kong, Hai Ou, Juncong She, Shaozhi Deng, Jun Chen
Summary: High-voltage thin-film transistors (HV-TFTs) with designed field-plates are demonstrated to work in a wide range of kilo-voltage and with tunable breakdown voltages. Investigating the placement and voltage biasing of the field plates, it is found that the enhanced breakdown voltage is associated with a reduced electric potential at the end of the gated channel. This study reveals the breakdown mechanisms of HV-TFTs and provides an effective design route for balancing breakdown voltages and on-current.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Deyi Huang, Yicong Chen, Chengyun Wang, Juncong She, Shaozhi Deng, Jun Chen
Summary: The study investigates the influence of controlled saturation current on the response speed of MOSFET-controlled FEAs, finding that the response speed decreases nearly linearly as the saturation current decreases. A solution is proposed using a controlled current larger than the induced current during the charging process and can rapidly reduce to the field emission current to balance stability and response speed.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Yicong Chen, Xuqi Wang, Libin Wang, Chengyun Wang, Guofu Zhang, Juncong She, Shaozhi Deng, Jun Chen
Summary: This work investigates the field emission characteristics of addressable gated field emitter arrays (FEAs) and establishes a general model based on FN theory. The study reveals that nonlinear FN plots with positive and negative slopes can occur in gated FEAs, and the turning point of the curves is related to the proportion of anode and gate field. In addition, the research finds that the transconductance of the gated FEAs increases exponentially with the total surface field. A demonstration using addressable gated ZnO nanowire FEAs is also presented, showing a well-fitted relationship between the transconductance and anode voltage.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Yicong Chen, Yu Zhang, Juncong She, Shaozhi Deng, Jun Chen
Summary: In this work, a model was established to study the transient emission current and temperature distribution of individual nanowires during pulsed field emission. Factors influencing the maximum transient emission current were investigated, and guidelines for improving the emission current in different applications were given. This study provides important insights for designing quasi-one-dimensional nanowire field emitter arrays.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Nanoscience & Nanotechnology
Jinlun Huang, Yifeng Huang, Miaoxuan Zeng, Ningsheng Xu, Yuan Huang, Jun Chen, Juncong She, Shaozhi Deng
Summary: Metal cone-shaped nanotip field-electron emitters, known as Spindt-type tips, have shown great potential in vacuum micro-/nanoelectronics. This study presents an in situ stress-release process for fabricating chromium (Cr) tip arrays. The process involves the use of patterned photoresist microcavities and trenches for the formation and stress release of the metal tips. High-aspect-ratio Cr tips were achieved by plasma etching, and a gated Cr-tip array was fabricated using a self-aligned microfabrication procedure. The Cr tips exhibited good etch resistance and showed emission current suitable for various applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Physics, Applied
Guichen Song, Yicong Chen, Shaozhi Deng, Jun Chen
Summary: The study establishes a general model for a gated hot carrier tunneling device to determine the optimized thickness of a tunneling barrier for improving the collection efficiency. Simulation results show that the maximum efficiency is influenced by the field strength, tunneling barrier height, mean free path, and threshold energy. Additionally, experimental measurements on a graphene/h-BN/graphene heterostructure confirm the model and provide insight into the emission efficiency as a function of h-BN thickness.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zekun Guo, Haojian Lin, Hu Zhang, Yan Tian, Yicong Chen, Jun Chen, Shaozhi Deng, Fei Liu
Summary: Tetragonal borophene sheets with high ambient stability were successfully fabricated by the LPCVD method. Compared with bulk counterparts, 2D borophene has potential applications in high-speed transistors, optoelectronic detection, field emission, and mechanical enforcement areas. The research suggests that LPCVD-grown borophene may be a promising building block for constructing high-performance nanodevices with good ambient stability.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Engineering, Electrical & Electronic
Song Kang, Yicong Chen, Chengyun Wang, Guofu Zhang, Shaozhi Deng, Jun Chen
Summary: In this article, a fully vacuum-encapsulated transparent flat-panel X-ray source was prepared using ZnO nanowires cold cathode and indium-tin-oxide (ITO) transmission anode. The effect of ITO film thickness on X-ray radiation intensity was studied. The results showed a radiation dose rate of 6.85 mGy/s measured at 5 cm in front of the flat-panel X-ray source (FPXS) and an optical transmittance of 72.63% at 550-nm light. X-ray spectra indicated indium as the main element for X-ray generation. With the device used in an X-ray and visible light dual-functional inspection setup, simultaneous X-ray and visible light imaging of objects was demonstrated.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Physical
Manni Chen, Zhipeng Zhang, Bin Wen, Runze Zhan, Kai Wang, Shaozhi Deng, Jiangsheng Xie, Jun Chen
Summary: This study presents the use of Ga2O3 compact layer to form a heterojunction structure with FAPbI3 for perovskite-based X-ray detectors. The FAPbI3/Ga2O3 detector exhibits significantly reduced dark current and increased photo-to-dark current ratio compared to the bare FAPbI3 detector. It also achieves a lower detection limit and shorter response time. Furthermore, the FAPbI3/Ga2O3 device demonstrates better repeatability due to the suppression of ion migration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Jingshun Pan, Qiang Li, Yaoming Feng, Ruifeng Zhong, Zhihao Fu, Shuixian Yang, Weiyuan Sun, Bin Zhang, Qi Sui, Jun Chen, Yuecheng Shen, Zhaohui Li
Summary: Photoacoustic tomography (PAT) is an attractive imaging modality that provides optical contrast with acoustic resolutions. In this work, we demonstrate PAT with a chalcogenide-based micro-ring sensor array and develop an effective means of parallel interrogation using a digital optical frequency comb.
NATURE COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Jiaquan Kong, Chuan Liu, Xiaojie Li, Hai Ou, Juncong She, Shaozhi Deng, Jun Chen
Summary: In this study, equations were derived to describe the current-voltage relations of offset Corbino thin film transistors. The influence of offset position and parameters on saturation voltage and current was quantitatively described. The theoretical physical model was verified through computer-aided design simulation and experimental results.
Article
Radiology, Nuclear Medicine & Medical Imaging
Xu Li, Shuang Huang, Zengxiang Pan, Peishan Qin, Wangjiang Wu, Mengke Qi, Jianhui Ma, Song Kang, Jun Chen, Linghong Zhou, Yuan Xu, Genggeng Qin
Summary: This study demonstrates the feasibility of using an end-to-end U-net for deblurring and deoverlapping in the flat-panel X-ray source domain. The neural network successfully converts overlapping cone beam projections to parallel beam projections, and the resulting images have high structural similarity to the original parallel beams. The model achieves excellent performance on different tasks and shows good generalization ability.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Yicong Chen, Jun Chen, Zhibing Li
Summary: This article reviews the recent progress on cold cathodes with graphene as the direction, including both experimental and theoretical studies. The review emphasizes the phenomena that are absent in conventional cold cathodes but present in two-dimensional van der Waals materials, such as directionality and coherence. It also covers the fabrication of emitter structures for field emission applications, their field emission properties, and the existing field emission model.
Article
Engineering, Electrical & Electronic
Weiwen Wu, Jianjia Zhang, Shaoyu Wang, Jun Chen
Summary: A new stationary CT scanner called FANS, based on a flat-panel addressable nanowire-cold-cathode architecture, is proposed. The FANS scanner is a small and cheap system as it utilizes a low-cost compact flat-panel X-ray source. It is also a stationary CT system with fast-switching capabilities. Moreover, the FANS system provides high-quality image output by incorporating superior regularization priors.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Nanoscience & Nanotechnology
Shuangyang Kuang, Li Su, Xiaoyan Wei, Jun Zhou, Liwei Xiong, Liang Huang
Summary: The self-powered seawater desalination system proposes a solution to reduce energy consumption and environmental pollution by using a wind-driven nanogenerator. This system achieves high desalination capacity and can utilize natural wind energy for desalination.
ACS APPLIED MATERIALS & INTERFACES
(2023)
