Article
Materials Science, Multidisciplinary
Wenshan Chen, Xiangyu Xu, Jiaye Zhang, Jueli Shi, Jiawei Zhang, Wencheng Chen, Quin Cheng, Yuzheng Guo, Kelvin H. L. Zhang
Summary: This work reports the fabrication and performance of high performance solar-blind deep-UV photodetectors using (InxGa1-x)(2)O-3 thin films. The results show that controlling the In content in the films can achieve high sensitivity to solar-blind UV spectrum. Compared to Ga2O3, the (InxGa1-x)(2)O-3 films demonstrate enhanced performance due to the modulation of optical and electronic properties by In.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Yu Zhou, Xiao Qiu, Zhu'an Wan, Zhenghao Long, Swapnadeep Poddar, Qianpeng Zhang, Yucheng Ding, Chak Lam Jonathan Chan, Daquan Zhang, Kemeng Zhou, Yuanjing Lin, Zhiyong Fan
Summary: This study presents a wearable UV wristband based on a self-powered flexible perovskite photodetector for real-time UV monitoring. The wristband demonstrates excellent UV detection performance, outstanding mechanical robustness, and desirable operational stability, which can be displayed and recorded on a smartphone to prevent prolonged UV exposure.
Article
Chemistry, Multidisciplinary
Yuehui Wang, Haoran Li, Jia Cao, Jiaying Shen, Qingyi Zhang, Yongtao Yang, Zhengang Dong, Tianhong Zhou, Yang Zhang, Weihua Tang, Zhenping Wu
Summary: High-performance avalanche photodetectors (APDs) based on amorphous Ga2O3 (a-Ga2O3)/ITO heterojunction have been successfully fabricated, showing ultrahigh responsivity, specific detectivity, external quantum efficiency, and exceptional capability for detecting ultraweak signals under 254 nm light irradiation. The superior performance of a-Ga2O3-based APDs can be attributed to intrinsic carrier transport mechanisms in a-Ga2O3 and modified band alignment at the heterojunctions, providing greater design flexibility for wide applications of emerging Ga2O3 semiconductor with improved performance.
Article
Nanoscience & Nanotechnology
Ping-Feng Chi, Feng-Wu Lin, Ming-Lun Lee, Jinn-Kong Sheu
Summary: This article demonstrates solar-blind photodetectors composed of Ga2O3/p-GaN bipolar heterojunctions formed through thermal oxidation and silicon ion implantation processes. The experimental results show that the thermal oxidation process converts p-GaN into semi-insulating β-Ga2O3 films, while silicon ion implantation transforms the insulating properties into n-type β-Ga2O3 with low resistivity and high electron concentration. The fabricated PDs exhibit high photoresponses in the solar-blind band.
Article
Nanoscience & Nanotechnology
Xinhong Zhao, Yu Tao, Jixiang Dong, Yongchu Fang, Xiaoxian Song, Zaoxue Yan
Summary: In this study, Cs3Cu2I5/ZnO heterostructure flexible photodetectors were successfully constructed using a low-temperature solution method and spin-coating technique. The heterostructure exhibited enhanced light/dark current ratio and ultraviolet-to-visible rejection ratios. The Cs3Cu2I5/ZnO heterostructure shows promising potential for wearable and portable visible-blind ultraviolet optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
B. Hanna, Lekshmi R. Pillai, Kavya Rajeev, K. P. Surendran, K. N. N. Unni
Summary: We fabricated and characterized UV photodetectors using thin films of polymer/ZnO nanocomposites. By studying different polymers and varying the ZnO content, we found that the P(VDF-TrFE)/ZnO nanocomposite with a ferroelectric property exhibited the best performance. The choice of top electrode material also played a significant role in the device performance.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Yiyao Peng, Junfeng Lu, Xiandi Wang, Wenda Ma, Miaoling Que, Qiushuo Chen, Fangtao Li, Xianhu Liu, Wenchao Gao, Caofeng Pan
Summary: This paper demonstrates a self-powered and flexible ultraviolet photodetector with high sensitivity, fast response, broad spectral response, good reproducibility, and superior mechanical stability. Furthermore, the relative responsivity can be enhanced through the piezo-phototronic effect.
Article
Materials Science, Multidisciplinary
Xiangyu Xu, Ziqian Sheng, Jueli Shi, Xin Chen, Yaxin He, Wenjing Xu, Xu Zhang, Duanyang Chen, Hongji Qi, Kelvin H. L. Zhang
Summary: The bandgap of (AlxGa1-x)(2)O-3 thin films can be modulated by varying the Al contents, resulting in high-performance photodetectors for solar-blind UV bands. The detection cut-off wavelengths and response peaks of the photodetectors can be tuned by changing the Al contents. The wide variations of the bandgap are mainly due to the upshift of the conduction band edges induced by Al 3s state hybridization.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Anil Yadav, Jitesh Agrawal, Vipul Singh
Summary: The study presented completely solution-processed Ag-ZnO nanostructures for highly selective, visible-blind, and stable UV photodetector development. The Ag-decorated ZnO exhibited significant improvements in current leakage, photosensitivity, and UV to visible rejection ratio, showing potential for replacing complex and costly synthesis processes.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Jianan Lv, Xinyue Lu, Xin Li, Minxuan Xu, Jiasong Zhong, Xin Zheng, Yueqin Shi, Xuefeng Zhang, Qi Zhang
Summary: The all-inorganic lead-free Cu-based halide perovskites have attracted extensive interest recently due to their impressive photophysical characteristics. In this study, 2D all-inorganic perovskite Cs3Cu2I5 single crystals were successfully grown on mica substrates, and UV photodetectors based on individual Cs3Cu2I5 nanosheets were fabricated, showing high responsivity and fast response speed, outperforming other 2D metal halide perovskite UV sensors. This work sheds light on the fabrication of green optoelectronic devices based on lead-free 2D perovskites, important for the sustainable development of photoelectric technology.
Article
Engineering, Electrical & Electronic
Arathy Varghese, Abdalla Eblabla, Zehao Wu, Seyed Urman Ghozati, Khaled Elgaid
Summary: This paper presents a performance evaluation of a GaN HEMT-based UV detector on a Si substrate. Through simulations, the UV detection mechanism was investigated, and the fabricated device exhibited a high UV responsivity. The device was found to be blind to visible light, ensuring selective detection of UV wavelengths.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Tingting Yan, Sa Cai, Zijun Hu, Ziqing Li, Xiaosheng Fang
Summary: In this study, the dark current of a TiO2-based PD was effectively reduced by introducing 3 PC71BM, and the self-powered responsivity was increased to 33 mA/W through further optimization of interface layer and electrode material, achieving ultrafast rise/decay times.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Analytical
Antoni Rogalski, Zbigniew Bielecki, Janusz Mikolajczyk, Jacek Wojtas
Summary: The paper presents the long-term evolution and recent development of ultraviolet photodetectors, covering different types of detectors and their advancements. Attention is given to wide band gap semiconductor photodetectors, including AlGaN, SiC-based, and diamond detectors, as well as Ga2O3 as a promising material. New UV photodetector concepts based on low-dimensional solid materials are also discussed, highlighting improvements in performance.
Article
Materials Science, Multidisciplinary
Vaishnavi Krishnamurthi, Taimur Ahmed, Md Mohiuddin, Ali Zavabeti, Naresh Pillai, Christopher F. McConville, Nasir Mahmood, Sumeet Walia
Summary: A liquid metal exfoliation technique was utilized to obtain millimeter-scale ZnO nanosheets with a thickness down to 5 nm, showcasing their potential applications in high-performance electronic and optoelectronic devices.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Physical
Yanyan Peng, Dayong Jiang, Man Zhao, Yuhan Duan, Haoming Wei, Haoda Li, Qingcheng Liang, Shiwei Wang
Summary: In recent years, there has been widespread attention on combining perovskite with other materials to enhance the optoelectronic performance and detection range. This study prepared ZnO/perovskite heterostructure photodetectors using sputtering and sol-gel spin-coating method. The ZnO/perovskite photodetector exhibited superior photoelectric performance over a wide detection range compared to ZnO and perovskite photodetectors. The heterojunction formed reduced the dark current, carrier recombination, and enhanced the photovoltaic performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Shiyu Wei, Zhe Li, Krishnan Murugappan, Ziyuan Li, Fanlu Zhang, Aswani Gopakumar Saraswathyvilasam, Mykhaylo Lysevych, Hark Hoe Tan, Chennupati Jagadish, Antonio Tricoli, Lan Fu
Summary: The rapid development of IoT has led to an increasing demand for self-powered gas sensors for real-time data collection and autonomous responses in various industries. However, most reported self-powered devices, particularly NO2 sensors for air pollution monitoring, have limitations in sensitivity, selectivity, and scalability. In this study, a novel photovoltaic self-powered NO2 sensor based on InP nanowire arrays is demonstrated, which overcomes these limitations. The sensor achieves a high sensing response and low detection limit even under low light intensity, and shows promising performance in dynamic environmental monitoring of motor vehicle exhaust.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Analytical
Dan Shao, Fei Su, Xueyu Zou, Jie Lu, Sitong Wu, Ruijun Tian, Dongmei Ran, Zhiyong Guo, Dayong Jin
Summary: Lung adenocarcinoma is the most common type of lung cancer, and pixel-level labeling can assist pathologists in tumor grading. By manually annotating a dataset and using a data stitching strategy, a framework for lung adenocarcinoma pathology analysis was developed, which accurately labels the histologic patterns of lung adenocarcinoma.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Langping Tu, Kefan Wu, Yongshi Luo, Enhui Wang, Jun Yuan, Jing Zuo, Ding Zhou, Bin Li, Jiajia Zhou, Dayong Jin, Hong Zhang
Summary: Relatively low efficiency is the bottleneck for the application of lanthanide-doped upconversion nanoparticles. The high-level doping strategy realized in recent years has not improved the efficiency as much as expected. This study combines theoretical simulation and spectroscopy to elucidate the role of cross relaxation (CR) in the upconversion process and demonstrates that inhibiting CR significantly improves upconversion efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Electrochemistry
Amirmohammad Khosravi Ghasemi, Mohsen Ghorbani, Mohammad Soleimani Lashkenari, Noushin Nasiri
Summary: Storage of energy and the pollution of the environment are major challenges facing the world today. Hybrid supercapacitors have attracted attention due to their high energy/power density and extended life cycle. A ternary PANI/GO/CuFe2O4 nanocomposite was developed as a new hybrid supercapacitor electrode, which exhibited the highest specific capacitance and cycle stability compared to single and binary samples. These findings suggest that the ternary PANI/GO/CuFe2O4 composite material can be used as a unique electrode material for high-efficiency and reliable energy storage devices.
ELECTROCHIMICA ACTA
(2023)
Article
Green & Sustainable Science & Technology
Mellissa Hardtke, Leila Khanjaninejad, Candace Lang, Noushin Nasiri
Summary: Despite efforts to reduce gender inequality in STEM, engineering remains one of the least equitable fields in Australian universities. There is a lack of research in understanding the factors contributing to Australian women students' participation in engineering. To address this, a qualitative study was conducted with women undergraduate students at Macquarie University. Findings indicate that gendered perceptions and stereotypes negatively impact women students' experiences and persistence in engineering, creating barriers both within the university and in future workplace environments.
Article
Chemistry, Multidisciplinary
Aditya Tripathi, Anastasiia Zalogina, Jiayan Liao, Matthias Wurdack, Eliezer Estrecho, Jiajia Zhou, Dayong Jin, Sergey S. Kruk, Yuri Kivshar
Summary: We demonstrate the effect of spin-momentum locking on upconversion photoluminescence emitted from rare-earth doped nanocrystals coupled to a phase-gradient dielectric metasurface. Different directionalities for left and right circular polarized light are observed, which can be attributed to the photonic Rashba effect that leads to a spin-dependent splitting of emitted light in momentum space.
Article
Chemistry, Multidisciplinary
Yongtao Liu, Jiajia Zhou, Shihui Wen, Fan Wang, Hongjun Wu, Qian Chen, Chao Zuo, Dayong Jin
Summary: Multiphoton upconversion super-resolution microscopy (MPUM) is a promising imaging modality that achieves increased resolution and penetration depth through the use of nonlinear near-infrared emission light. However, high excitation power is required for emission saturation, leading to increased phototoxicity. In this study, the authors propose a simple on-chip mirror design that allows for nonlinear saturation emission under low excitation power. This method significantly decreases the excitation power and enables a lateral resolution of around 35 nm in imaging single nanoparticles on-chip. The findings offer a straightforward solution for enhancing super-resolution imaging using pre-designed on-chip devices.
Article
Biochemical Research Methods
Shuang Fu, Wei Shi, Tingdan Luo, Yingchuan He, Lulu Zhou, Jie Yang, Zhichao Yang, Jiadong Liu, Xiaotian Liu, Zhiyong Guo, Chengyu Yang, Chao Liu, Zhen-li Huang, Jonas Ries, Mingjie Zhang, Peng Xi, Dayong Jin, Yiming Li
Summary: We propose a deep-learning method for precise localization of spatially variant point emitters, covering the full chip of a modern sCMOS camera. By using a graphic processing unit-based vectorial point spread function fitter, we accurately model the spatially variant PSF of a high numerical aperture objective in the entire field of view. Combined with deformable mirror-based optimal PSF engineering, we demonstrate high-accuracy three-dimensional single-molecule localization microscopy over a large volume, enabling imaging of mitochondria and nuclear pore complexes in entire cells without hardware scanning, with a 100-fold increase in throughput compared to existing techniques.
Article
Nanoscience & Nanotechnology
Bikesh Gupta, Doudou Zhang, Hongjun Chen, Chennupati Jagadish, Hark Hoe Tan, Siva Karuturi
Summary: This study presents a novel approach for fabricating high-performance solar cells based on InP heterojunctions using a solution-processed ferri-hydrite (Fh) electron-selective contact (ESC). The champion cell efficiency of 16.6% is achieved, which is a significant improvement over those from previous studies using other solution-processed ESC materials. The Fh layer not only selectively extracts photogenerated electrons from InP but also simultaneously serves as a surface protection layer, improving the cell's long-term stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Gungun Lin, Jawairia Umar Khan, Sareh Zhand, Yuan Liu, Dayong Jin
Summary: Researchers have developed a modular hydrogel membrane carrier with composite DNAzymes for rapid and highly sensitive detection of pathogenic bacteria gene target analytes. By incorporating composite DNAzymes into a polymer network, the researchers were able to release the DNAzymes to cleave RNA reporter probes and generate fluorescence, achieving quantitative assay performance. The work represents a significant advancement in the development of a versatile pathogenic bacteria testing platform. Overall, the importance of this research is 9 out of 10.
ANALYTICAL CHEMISTRY
(2023)
Article
Optics
Shui-Jing Tang, Mingjie Zhang, Jialve Sun, Jia-Wei Meng, Xiao Xiong, Qihuang Gong, Dayong Jin, Qi-Fan Yang, Yun-Feng Xiao
Summary: Researchers demonstrate real-time measurement of natural vibrations of single mesoscopic particles using photoacoustic excitation and acoustic coupling to an optical microresonator for readout. This technology extends the reach of vibrational spectroscopy and is applied for biomechanical fingerprinting of microorganisms at the single-cell level.
Article
Multidisciplinary Sciences
Chao Mi, Xun Zhang, Chengyu Yang, Jianqun Wu, Xinxin Chen, Chenguang Ma, Sitong Wu, Zhichao Yang, Pengzhen Qiao, Yang Liu, Weijie Wu, Zhiyong Guo, Jiayan Liao, Jiajia Zhou, Ming Guan, Chao Liang, Chao Liu, Dayong Jin
Summary: Researchers have developed a high-resolution near-infrared-II (NIR-II) imaging method for non-invasive diagnosis of skeletal disorders. By using lanthanide-doped nanocrystals, they were able to passively target the bone marrow and achieve effective bone imaging for over two months. The NIR-II imaging technique showed comparable results to X-ray imaging and could also diagnose early onset inflammation in rheumatoid arthritis.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Gungun Lin, Jawairia Umar Khan, Sareh Zhand, Yuan Liu, Dayong Jin
Summary: This study presents a modular hydrogel membrane carrier incorporated with composite DNAzymes for rapid and highly sensitive detection of pathogenic bacteria gene targets. The composite DNAzymes are incorporated into polyethylene glycol diacrylate polymer networks, allowing for the cleavage of RNA substrate components to generate fluorescence. By modulating the morphology, composition, and microporous structures of the DNAzyme carriers, quantitative assay performance is achieved. This work represents an important advancement in the development of a generic, isothermal, and protein enzyme-free pathogenic bacteria testing platform technology.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Biomedical
Fu Zou, Yuanhua Liu, Zelyu Chen, Zhanghao Karl, Dayong Jin
Summary: This paper introduces a lightweight network FRUNet based on U-Net, which combines the advantages of Fourier Channel Attention (FCA Block) and Residual unit to improve image segmentation accuracy. FCA Block automatically assigns the weight of learned frequency information to the spatial domain, paying more attention to the precise high-frequency information of diverse biomedical images. The combination of FCA and U-Net is studied, with the skip connection of U-Net fusing encoder information with the decoder. Extensive experimental results show that FRUNet outperforms other advanced medical image segmentation methods in terms of network parameters and accuracy, particularly excelling in pathological section segmentation of nuclei and glands.
IEEE JOURNAL OF TRANSLATIONAL ENGINEERING IN HEALTH AND MEDICINE
(2023)
Article
Chemistry, Multidisciplinary
Zayakhuu Gerelkhuu, Haribalan Perumalsamy, Mahnaz Maddahfar, Dayong Jin, Jaewoo Song, Tae Hyun Yoon
Summary: In order to promote the use of lanthanide-doped upconversion nanoparticles (UCNPs) in various biomedical applications, it is important to assess their toxicity comprehensively, including their cellular association and interactions with human immune cells. Recent advancements in high-throughput single-cell technologies have enabled us to gain a better understanding of the complex interactions between nanoparticles and human immune cells. In this study, we used a single-cell based mass cytometry technique to investigate the heterogeneous interactions of Yb3+/Er3+-doped NaYF4 UCNPs with human peripheral blood mononuclear cells (hPBMCs). The study demonstrated a new innovative approach to understanding the heterogeneous interactions of conventional nanomaterials with complex human immune systems, which will facilitate the safe implementation of nanomaterials in biomedical applications.
ENVIRONMENTAL SCIENCE-NANO
(2023)
