Article
Optics
Lingfeng Zhang, Peng Wan, Tong Xu, Caixia Kan, Mingming Jiang
Summary: In this study, a high-performance UV photodetector was fabricated by combining zinc oxide microwires with polyaniline, resulting in a device with high responsivity and detectivity under UV illumination. The photodetector also demonstrated fast response and recovery times, along with excellent flexibility and stability under bending conditions.
Article
Nanoscience & Nanotechnology
Maosheng Liu, Mingming Jiang, Qinzhi Zhao, Kai Tang, Shulin Sha, Binghui Li, Caixia Kan, Da Ning Shi
Summary: Through a single MW field-effect transistor, we successfully synthesized Sb-doped p-type ZnO microwires and achieved an optical microcavity with a regular hexagonal cross-section and smooth sidewall facets, enabling whispering-gallery-mode lasing. By combining p-ZnO:Sb MW with an n-ZnO layer, we constructed a single ZnO:Sb MW homojunction LED which exhibited typical UV emission. Spatially resolved electroluminescence spectra demonstrated strong exciton-photon coupling in the p-ZnO:Sb MW/n-ZnO homojunction LED, contributing to the exciton-polariton effect. Varying the cross-sectional dimensions of ZnO:Sb wires further modulated the exciton-photon coupling strengths. These results provide an effective exemplification of reliable p-type ZnO and greatly promote the development of low-dimensional ZnO homojunction optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Guan-Chi Lee, Lian-Ming Lyu, Kai-Yuan Hsiao, Yu-Sheng Huang, Tsong-Pyng Perng, Ming-Yen Lu, Lih-Juann Chen
Summary: This study applied a piezo-potential to ZnO/ZnS/MoS2 heterostructures to enhance the separation of photoexcited electrons and holes, resulting in increased production of H2. The heterostructures were synthesized through hydrothermal synthesis, and the H2 production varied with the different mixing ratios of ZnO and MoS2. When a piezopotential was introduced through ultrasonication during the photocatalytic reaction, the rate of H2 production significantly increased due to band tilting and improved charge transfer.
Article
Chemistry, Multidisciplinary
Xingjie Liu, Maosheng Liu, Rongde Zhu, Binghui Li, Peng Wan, Daning Shi, Caixia Kan, Mingming Jiang
Summary: This study explores the importance of heterostructure manufacturing in semiconductor optoelectronic devices and demonstrates the design and construction of a green light-emitting diode (LED) with high-brightness, high-stability, and minimal efficiency droop. The results indicate that band alignment modification at the ZnO:Ga/InGaN heterointerface and capping of Au nanoparticles effectively enhance the electroluminescence properties of the LED.
Article
Chemistry, Multidisciplinary
Mingming Jiang, Kai Tang, Peng Wan, Tong Xu, Haiying Xu, Caixia Kan
Summary: Exciton-polariton light-emitting diodes (LEDs) were successfully fabricated using high quality whispering gallery mode (WGM) microcavities naturally formed by hexagon-shaped Ga-doped ZnO microwires and p-GaAs templates. The exciton-polariton coupling strength in single microwire-based LEDs can be tuned by adjusting the microcavity size.
Article
Chemistry, Multidisciplinary
Apurba Baral, Navonil Bose, Bibhutibhushan Show, Nil Ratan Bandyopadhyay, Nillohit Mukherjee
Summary: ZnO/f-MWCNT composite was synthesized and its potential as a hybrid energy storage device was investigated. A symmetric super-capacitor device was fabricated and its performance was evaluated. Furthermore, the energy harvesting possibilities of ZnO/f-MWCNT composite through the fabrication of a PENG device were explored.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Junfeng Lu, Xiaopeng He, Juan Xu, Fangtao Li, Qingbin Tang, Xiaoxuan Wang, Jun Dai, Qiushi Yao, Feifei Qin, Chunxiang Xu
Summary: In this study, CsPbBr3 microwires were used as gain media and microresonators to achieve two-photon pumped frequency upconversion single-mode lasing. Theoretical calculation and experimental validation showed that CsPbBr3 microwires possess the capability to achieve this output, and the relationship between exciton binding energy and light emission was extracted.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yoojoo Yun, Dong Hoon Shin, Hakseong Kim, Jun Hee Choi, Hyunjeong Jeong, Dongseok Suh, Haeyong Kang, Sang Wook Lee
Summary: The electrical properties of a single facet of an individual ZnO microwire were investigated. The carrier concentration and mobility on the ZnO surface were found to vary along the axial direction of the wire. In addition, nanoscale local Hall probes fabricated by the researchers were able to detect subtle variations in carrier concentration.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Haiying Xu, Juan Xu, Mingming Jiang, Maosheng Liu, Kai Tang, Caixia Kan, Daning Shi
Summary: In this study, one-dimensional (1D) superlattice microwires were synthesized and used to construct a waveguide light source, demonstrating their optical properties. The results indicate that these 1D superlattice microwires can be employed to develop exciton-polariton luminescence/lasing light sources with low-threshold/thresholdless lasers for practical applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Biomedical
Seung Woo Lee
Summary: This study introduces a novel bent flat microwire array for selective activation of cortical columns in mouse brain slices using magnetic stimulation. Array designs with different tip spacings have varying effects on activation, with the 340 μm spacing producing the clearest spatial patterns of activation.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Wenxia Ma, Meiling Lv, Feiping Cao, Zheng Fang, Yuqin Feng, Gang Zhang, Yongsheng Yang, Hongjun Liu
Summary: A ZnO-GO nanocomposite prepared by hydrothermal method at room temperature showed effective degradation of organic dye pollutants and exhibited excellent antibacterial activity due to ultrasound-driven piezoelectric catalysis effect.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Cheng Yu, Xiang-Xiang Yu, Ding-Shan Zheng, Hong Yin
Summary: Novel nanostructures of ZnO nanowire and nanosheet arrays were synthesized by a hydrothermal method, exhibiting both piezoelectric and photocatalytic properties with typical wurtzite structures. Under illumination, the nanowires and nanosheets showed increased degradation rates for RhB with longer reaction times and stirring. The piezo-photodegradation mechanism was analyzed using photocurrent testing and finite element method.
Review
Pharmacology & Pharmacy
Md. Amdadul Huq, Md. Aminul Islam Apu, Md. Ashrafudoulla, Md. Mizanur Rahman, Md. Anowar Khasru Parvez, Sri Renukadevi Balusamy, Shahina Akter, Md. Shahedur Rahman
Summary: Biosynthesized zinc oxide nanoparticles (ZnONPs) have gained attention for their safe and non-toxic nature and powerful antimicrobial characteristics. Microbes and plants have been used to synthesize ZnONPs in a facile, rapid, cost-effective, and non-toxic manner. The antimicrobial mechanisms of ZnONPs include the generation of reactive oxygen species, disruption of cell walls and membranes, and damage to DNA.
Article
Materials Science, Multidisciplinary
Peng Wan, Mingming Jiang, Tong Xu, Yang Liu, Caixia Kan
Summary: This study designed a high-performance self-powered ultraviolet photodetector by enhancing carrier transport through fine doping, which showed significantly improved responsivity and detectivity compared to undoped detectors.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Runqing Huang, Yaxuan Zhao, Zixu Wang, Yichen Gan, Nan Shen, Abbas Amini, Run Shi, Chun Cheng
Summary: Stress/strain engineering is an effective way to adjust the thermal conductivity of materials dynamically. Micro-/nanoscale structures can undergo stress/deformations resulting in changes in thermal conductivity, with reversible changes observed with small bending and irreversible changes with large bending. Through experimental methods, it was found that the thermal conductivity of Si wires can be dynamically tuned by bending.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Chun-Sheng Wu, Sheng-Chan Wu, Bo-Ting Yang, Zong Yu Wu, Yu Hsun Chou, Peter Chen, Hsu-Cheng Hsu
Summary: A single-mode laser with ultra-high quality factor was successfully realized in CsPbBr3 perovskite micro-hemispheres fabricated by chemical vapor deposition, demonstrating single-mode lasing behavior with high quality factor at room temperature. Analysis based on cavity size showed that lasing threshold increases with decreasing cavity size, confirmed by time-resolved PL analysis. Additionally, strong Purcell enhancement effect was observed in the system with high beta-factor and Purcell factor as a function of cavity size.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Zong Yu Wu, Yan Yu Chen, Li-Jyuan Lin, Hsu-Cheng Hsu
Summary: This study demonstrates a lead-free gamma-CsSnI3 perovskite random lasing operated at room temperature, with high-purity gamma-CsSnI3 films grown by chemical vapor deposition showing prolonged stability and achieving a random laser with a high Q-factor (approximately 3000) at excitation energy above 18 mJ/cm(2).
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Sheng-Chan Wu, Gia-Yuan Zhuang, Yia-Chung Chang, Hsu-Cheng Hsu
Summary: Accurate determination of refractive index dispersion is crucial for optical device design. This study focused on hexagonal ZnO microrod cavities and investigated the impact of excitons on refractive index dispersion near resonance energy. The modified Lorentz oscillator model was utilized to extract exciton resonance energy and damping term, yielding reliable results. The measured dispersion relations of polaritons agreed well with theoretical model predictions, supporting the validity of the study.
Article
Chemistry, Multidisciplinary
Kuan-Hsueh Peng, Sheng-Hsiung Yang, Zong-Yu Wu, Hsu-Cheng Hsu
Summary: Introducing DPMP or TPP ligands onto cesium lead bromoiodide nanocrystals improves air stability and optoelectronic properties, with DPMP showing better stabilization of emission, carrier lifetime, and photoluminescence quantum yield. The surface passivation by DPMP or TPP ligands reduces nonradiative recombination, leading to enhanced performance and prolonged device lifetime in perovskite light-emitting diodes.
Article
Optics
Abdullah Taha Ali, W. Maryam, Yu-Wei Huang, Hsu-Cheng Hsu, Naser M. Ahmed, N. Zainal, H. Abu Hassan, Mohammed Ali Dheyab
Summary: This study demonstrated the growth of vertically aligned Al-doped ZnO nanorods on glass substrate at different temperatures, with the Al content strongly depending on the growth temperature, achieving optimal doping level at 110 degrees C. Samples with high doping levels showed superior random lasing performance, with a noticeable redshift in the lasing peak.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Nurizati Rosli, Mohd Mahadi Halim, Md Roslan Hashim, Wan Maryam Wan Ahmad Kamil, Gia-Yuan Zhuang, Si-Yuan Chan, Hsu-Cheng Hsu
Summary: By tuning the concentration of the chemical bath solution, a transition from ZnO nanowalls to nanoflakes was achieved. The changes in particle size and crystallite size of the nanostructures affect the threshold and emission wavelength of random lasing. Ultimately, the nanoflakes structure showed the lowest threshold for random lasing, making it the best structure for ZnO random lasers.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Zhang-Wei Huang, Sheng-Hsiung Yang, Zong-Yu Wu, Hsu-Cheng Hsu
Summary: This study successfully enhanced the performance of inverted perovskite solar cells (PSCs) by preparing a nanoporous nickel oxide (NiOx) layer as the hole transport layer, which maintained 80% of its initial efficiency after 50 days of storage.
Article
Chemistry, Multidisciplinary
Zong Yu Wu, Jie-Hao Zhuang, Yu-Tsung Lin, Yu-Hsun Chou, Pin Chieh Wu, Chung-Lin Wu, Peter Chen, Hsu-Cheng Hsu
Summary: The study investigated the thermal photoluminescence characteristics of CsSnBr3 microstructures and their PL quenching behavior at high temperature. The monotonic blue shifts in PL emission upon temperature increase suggest a band gap widening associated with an emphasis effect. The estimated activation energy of thermally assisted nonradiative recombination for CsSnBr3 microsquares and micropyramids is higher than CsPbBr3, indicating better thermal stability.
Article
Optics
Sheng-Chan Wu, Ya-Chi Liu, Li-Jyuan Lin, Yia-Chung Chang, Hsu-Cheng Hsu
Summary: By studying the laser behavior and simulated modes of CsPbBr3 microwires, it is found that high-order transverse modes can sustain even with significant optical loss, and higher-order modes tend to appear before the fundamental mode on wider microwires. The challenges of sustaining whispering gallery mode in CsPbBr3 microwires highlight the importance of considering lateral dimensions and geometry for future low-threshold wire-based laser device designs.
Article
Optics
Abdullah Taha Ali, W. Maryam, Yu-Wei Huang, H. C. Hsu, Naser M. Ahmed, N. Zainal, Mahmood S. Jameel
Summary: This study focused on enhancing UV random lasing emissions using SiO2 capped Zinc Oxide nanorod array, resulting in a significant increase in lasing emission intensity. The best sample with 100 nm of SiO2 capping exhibited superior lasing performance, almost completely suppressing the spontaneous emission peak.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Abdullah Taha Ali, W. Maryam, Yu-Wei Huang, H. C. Hsu, Naser M. Ahmed, H. Abu Hassan, N. Zainal
Summary: Au-doped ZnO nanorods fabricated by chemical bath deposition were found to exhibit random laser emission characteristics. The doped nanorods showed increased crystallite size, indicating lattice expansion. Photoluminescence measurements revealed an emission peak at 570nm, which was attributed to transitions associated with oxygen vacancies due to doping. The lowest lasing threshold was observed in the sample with the highest Au doping percentage.
Article
Materials Science, Multidisciplinary
Meng-Cheng Yen, Chia-Jung Lee, Yung-Chi Yao, Yuan-Ling Chen, Sheng-Chan Wu, Hsu-Cheng Hsu, Yuto Kajino, Gong-Ru Lin, Kaoru Tamada, Ya-Ju Lee
Summary: Constructing polaritonic devices with monolayer-featured exciton-emitters in ultra-compact photonic architectures is essential for exploring the potential applications of optical nonlinearities, macroscopic condensations, and superfluidity. In this study, a feasible strategy for exciton-polariton formations is demonstrated by implementing a Tamm-plasmon polaritonic device with single-monolayered perovskite quantum dots. The metallic character of the device allows for a highly confined resonance mode that strongly overlaps with the embedded quantum dots, resulting in enhanced light-matter coupling. The dispersion relation and polariton-polariton interaction energy of the device can be tuned, making it a determinant step towards strong light-matter coupling and polariton spintronics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Sheng-Chan Wu, Chun-Sheng Wu, Ching-Hang Chien, Yu-Wei Zhang, Chung-Xian Yang, Cheng Liu, Ming-Hsien Li, Chen-Fu Lin, Yu-Hao Wu, Bi-Hsuan Lin, Yu-Hsun Chou, Yia-Chung Chang, Peter Chen, Hsu-Cheng Hsu
Summary: A convenient methodology based on temperature-dependent spectroscopy is proposed to investigate the effect of polariton resonant modes on refractive index dispersion. Stable exciton-polaritons and exciton-polarons are confirmed by energy dispersions and the observation of self-trapped exciton-polaron state. The large negative thermal-optic coefficient due to damping effect of exciton-phonon scattering is observed, indicating the potential use of quasi-2D perovskite as a phase compensator for conventional semiconductor materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sheng-Chan Wu, Chung-Xian Yang, Jer-Shing Huang, Yia-Chung Chang, Ching-Hang Chien, Hsu-Cheng Hsu
Summary: Herein, a method for estimating the light-matter coupling strength based on the shifts of resonant modes in temperature-dependent photoluminescence spectra from 295 to 77 K is proposed. ZnO microrods are used as microcavities to extract the temperature-dependent index dispersion and Rabi splitting. Additionally, the Rabi-splitting energy of bulk ZnO at 0 K is estimated to be about 289 meV.
Article
Engineering, Electrical & Electronic
Wei-Chih Lai, Tien-Yu Wang, Siou-Huei Yang, Po-Yuan Chen, Tzung-Fang Guo, Peter Chen, Hsu-Cheng Hsu
Summary: The addition of choline chloride was found to enhance the optoelectronic properties of perovskite materials and reduce the conversion time. It also led to changes in the morphology and absorption edge of the perovskite, resulting in improved optoelectronic properties.
ACS APPLIED ELECTRONIC MATERIALS
(2021)