Article
Physics, Applied
Johanna Meier, Julius Kahl, Adrian Avramescu, Martin Strassburg, Gerd Bacher
Summary: Researchers studied p-i-n InGaN/GaN core-shell microrod LEDs using confocal microscopy with high spatial resolution. They found that under low excitation conditions, the devices emit red light, with green and blue light becoming more prominent as driving current increases. Analysis of 3D photoluminescence maps revealed the origins of different emissions, with red light coming from the tip area, green light from the corners, and blue light from the m-plane. The study also confirmed the hypothesis of charge carrier tunneling losses through experiments with external voltage and laser excitation.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Andrey P. Tarasov, Arsen E. Muslimov, Vladimir M. Kanevsky
Summary: This study explores the optical gain mechanisms in hexagonal ZnO microrods and demonstrates high-performance whispering gallery mode (WGM) lasers. The main contribution to stimulated emission (SE) in near-threshold excitation intensities is found to be inelastic exciton-electron scattering.
Article
Materials Science, Multidisciplinary
Shuo Qian, Enhui Bao, Huiyu Chen
Summary: ZnO microflowers consisting of porous nanosheets were synthesized by hydrothermal reaction and subsequent annealing at 300 degrees C. Characterization through XRD, SEM, TEM, and N-2 adsorption-desorption test revealed that the ZnO microflowers had a size of about 6 mu m, a surface area of 58.6 m(2)/g, an average pore size of 14.1 nm, and a size distribution centered at 15.1 nm. The hydrothermal temperature played a crucial role in determining the shape and size of the ZnO products. These ZnO microflowers with porous structure and large surface area show potential applications in gas sensors, photo-catalysis, electrochemical energy storage, and more. The synthetic method presented here is simple, cost-effective, and can be extended to the preparation of other metal oxides with controlled structures.
Article
Materials Science, Multidisciplinary
Qiushi Jiang, Zhaolian Han, Yafeng Yuan, Chuan Cai, Jinying Li, Zhiqiang Cheng
Summary: This study introduces the reaction between nano-ZnO and H2C2O4 in the electrospinning solution to effectively adjust the heterostructure of TiO2/ZnO and control the particle size of nano-spheres. The soaking and calcination process allows ZnO to fully combine with the TiO2 precursor, forming a phase-mixed heterojunction. The phase-mixed structure enhances light utilization and results in enhanced photocatalytic activity and cycling stability of TiO2/ZnO mixed materials. This research provides a new approach for the preparation of controllable metal oxide phase-mixed materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Daniel Scheiber, Maxim N. Popov, Peter Supancic, Juergen Spitaler
Summary: The paper presents a study on the head-to-head (-O-Zn-O-) inversion boundaries (IB) in zinc oxide. Ab-initio calculations based on density-functional theory (DFT) are used to investigate the impact of impurities (Fe, Bi, Pr, Sn, Ti, and Sb) on IB formation under different atomic coverages. The results show that IBs are spontaneously formed in Sb-, Sn-, and Fe-doped ZnO, with coverages of 1/3, 1/2, and 1 monolayer, respectively. A half monolayer of Ti also reduces the IB formation energy, but it is not enough to trigger IB formation. Bi and Pr do not promote IB formation significantly under relevant conditions for ZnO sintering. Inspired by the success of DFT in evaluating IB energies, the implications for IB design and control are discussed.
Article
Physics, Applied
David Elam, Eduardo Ortega, Anastasiia Nemashkalo, Yuri Strzhemechny, Arturo Ayon, Arturo Ponce, Andrey A. Chabanov
Summary: In this study, ZnO thin films were successfully deposited by atomic layer deposition at relatively low temperatures. The homoepitaxial films exhibited high quality monocrystalline structure similar to the substrate, but the growth temperature affected the density and distribution of intrinsic defects.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Truong Thi Hien, Vu Thi Bich, Phan Thi Binh, Mai Thi Thanh Thuy, Tien Dai Nguyen, Man Minh Tan, Nguyen Manh Hung, Tran Thi Trang, Chu Thi Thu Hien, Chu Van Tuan, Nguyen Thi Nguyet
Summary: This study synthesized ZnO@CdS core-shell nanorods using a chemical bath deposition and hydrothermal method, and applied them to the photoanode for hydrogen evolution by water splitting. The results showed that the prepared photoanode exhibited high photocurrent density and energy conversion efficiency under solar light.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Ebrahim Chalangar, Elfatih Mustafa, Omer Nur, Magnus Willander, Hakan Pettersson
Summary: In this study, a new low-cost template-assisted synthesis method was used to fabricate vertically aligned ZnO nanorod arrays on Si (100). The nanorods were grown on a double seed layer composed of reduced graphene oxide (rGO) and Al-doped ZnO nanoparticles. The seed layer was prepared by spray-coating the substrate with graphene and dip-coating it into an Al-doped ZnO sol-gel solution. A growth template was created using a double-layer resist spin-coated on top of the rGO/ZnO:Al seed layer and patterned by colloidal lithography. The results showed successful chemical bath deposition of ZnO nanorods with controllable diameter and density in the nanoholes of the patterned resist mask. Our novel method has the potential to fabricate electronic devices on various smooth substrates with a short thermal budget and the seed layer acting as a conductive strain-relieving back contact. The top contact can be easily made by depositing a suitable transparent conductive oxide or metal, depending on the specific application.
Article
Chemistry, Multidisciplinary
Andres Jenaro Lopez Garcia, Giuliano Sico, Maria Montanino, Viktor Defoor, Manojit Pusty, Xavier Mescot, Fausta Loffredo, Fulvia Villani, Giuseppe Nenna, Gustavo Ardila
Summary: Zinc oxide nanowires are promising for various devices, and printing techniques offer advantages such as low cost and high quality results. Gravure printing is an effective method for depositing ZnO seed layers on flexible substrates, enabling the fabrication of flexible piezoelectric transducers with ZnO nanowires.
Article
Engineering, Environmental
Jiyu Sun, Fangyuan Liu, Usman Salahuddin, Mudi Wu, Chunxiang Zhu, Xingxu Lu, Bo Zhang, Binchao Zhao, Zhiqiang Xie, Yunjiang Ding, Dongsheng Li, Chang-Yong Nam, Feng-Yuan Zhang, Pu-Xian Gao
Summary: By tuning the experimental processing parameters, highly improved ZnO nanoarray supported Cu-ZnO-Al2O3 catalysts have been successfully demonstrated for methanol production under low-temperature and low-pressure conditions, with desirable yield and selectivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ngoc Linh Nguyen, Ngo Ngoc Ha
Summary: The electronic properties, stability, and migration mechanism of six different point defects on non-polar ZnO surfaces were investigated using first-principles density functional theory. The results revealed the formation of defective energy states within the band gap of ZnO surfaces, their orbital properties, and defect-induced local surface magnetic moments. The thermodynamic phase diagrams showed that free-defect structures are the most stable under the thermodynamic equilibrium condition, while oxygen-vacancy defect surfaces are only stable at lower oxygen chemical potentials. Additionally, the energy barriers of different defect migration mechanisms were simulated, providing insights into the suppression of defect formation.
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, Analytical
Jinyu Huang, Hao Liang, Jiexiong Ye, Dongting Jiang, Yiling Sun, Xuejin Li, Youfu Geng, Jiaqi Wang, Zhengfang Qian, Yu Du
Summary: Au-loaded ZnO sensors were successfully prepared via seed-assisted solvothermal methods, showing excellent performance in detecting HCHO with significantly improved detection limit and response to HCHO.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Clement Lausecker, Bassem Salem, Xavier Baillin, Vincent Consonni
Summary: The formation mechanisms of ZnO nanowires from Au seed layers are investigated for different precursor concentrations, leading to variations in the morphological properties. The thermodynamic properties of the chemical bath play a critical role in the formation of ZnO nanowires. This study provides valuable insights for optimizing the morphology of ZnO nanowires for their integration into piezoelectric devices.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Yunxia Wang, Aoqi Zhang, Zhitao Shao, Huan Yu, Yi Xu, Xin Liu, Mengqi Cui, Feng Gao, PingAn Hu, Wei Feng
Summary: In this work, Se microrod array films were prepared using an electrodeposition method, which showed excellent photodetection performance due to their larger electrochemically active surface area and stronger light absorption capabilities.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Chemical
Youdong Cheng, Xuerui Wang, Chuankun Jia, Yuxiang Wang, Linzhi Zhai, Qing Wang, Dan Zhao
JOURNAL OF MEMBRANE SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Yun Guang Zhu, Yonghua Du, Chuankun Jia, Mingyue Zhou, Li Fan, Xingzhu Wang, Qing Wang
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Multidisciplinary Sciences
Juezhi Yu, Yong-Sheng Hu, Feng Pan, Zhizhen Zhang, Qing Wang, Hong Li, Xuejie Huang, Liquan Chen
NATURE COMMUNICATIONS
(2017)
Article
Multidisciplinary Sciences
Yun Guang Zhu, Qi Liu, Yangchun Rong, Haomin Chen, Jing Yang, Chuankun Jia, Li-Juan Yu, Amir Karton, Yang Ren, Xiaoxiong Xu, Stefan Adams, Qing Wang
NATURE COMMUNICATIONS
(2017)
Article
Chemistry, Physical
Zixuan Liu, Yantao Zhang, Chuankun Jia, Hao Wan, Zhe Peng, Yujing Bi, Yang Liu, Zhangquan Peng, Qing Wang, Hong Li, Deyu Wang, Ji-Guang Zhang
Article
Electrochemistry
Li Fan, James Robert Jennings, Shaik M. Zakeeruddin, Michael Graetzel, Qing Wang
Article
Chemistry, Physical
Li Fan, Chuankun Jia, Yun Guang Zhu, Qing Wang
ACS ENERGY LETTERS
(2017)
Article
Chemistry, Multidisciplinary
Mingyue Zhou, Qizhao Huang, Thuan Nguyen Pham Truong, Jalal Ghilane, Yun Guang Zhu, Chuankun Jia, Ruiting Yan, Li Fan, Hyacinthe Randriamahazaka, Qing Wang
Article
Chemistry, Physical
Liangwei Yang, Fuzhen Zhao, Yan Zhao, Yangyong Sun, Guangwu Yang, Lianming Tong, Jin Zhang
Article
Chemistry, Applied
Guangwu Yang, Liangbin Li, Hao Liu, Yuanzhuang Cheng, Yanli Chen, Xiyou Li
Summary: The study found that Ca2+, Mg2+, and Zn2+ can act as catalysts to produce high-quality zeolite templated carbon (ZTC) and lower the growth temperature. The formation mechanism of ordered ZTC structure was also revealed.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Yuanzhuang Cheng, Guangwu Yang, Zhongcheng Tian, Yujie Cui, QianLi Xing, Hao Liu, Haolong Shi, Yujiang Zhong, Yanli Chen, Xiyou Li
Summary: A new type of hierarchical porous carbon material with tri-modal pore structure, Tri-PC, was successfully synthesized via a novel template approach. Tri-PC showed great potential as a catalyst support and exhibited higher catalytic activity compared to commercial catalysts.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Guangwu Yang, Mengyu Lu, Yuanzhuang Cheng, Hao Liu, Jingshun Shen, Liangbin Li, Wenjie Wang, Yanli Chen, Xiyou Li
Summary: This study demonstrates for the first time that zinc oxide (ZnO) can effectively catalyze the conversion of acetylene into graphene and significantly reduce the growth temperature. Through the use of ZnO nanoparticles as catalyst and template, super thin and defect rich graphene shell (TD-GS) is successfully prepared. By adjusting the growth conditions or process, new carbon structures can also be easily achieved.
Article
Chemistry, Physical
Guangwu Yang, Hao Liu, Xinmei Li, Chengben Liu, Zhi Li, Xiyou Li
Summary: Low-temperature processed perovskite films often have sub-micrometer scale grains and defects, which reduce the performance of perovskite solar cells (PSCs). This study demonstrates that carboxylated carbon nanotubes (COOH-CNTs) are effective additives for different types of PSCs and can improve their performance in terms of crystallization, light harvesting, and carrier extraction/transportation. The efficiency of (FAPbI3)0.97(MAPbBr3)0.03 PSC increased from 17.27% to 18.91%, and CsPbBr3 and MAPbBr3 devices showed efficiency improvements of over 11% and 7%, respectively.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Guangwu Yang, Hao Liu, Madi Arsakay, Jingshun Shen, Yanfeng Shen, Alisher Fatkhulloev, Rodney S. Ruoff
Summary: We achieved the synthesis of an ordered 3D microporous graphene architecture via chemical vapor deposition using zeolite as the template. The introduction of Ca2+ effectively catalyzed the growth of ZTC and reduced the growth temperature. Various synthetic parameters were investigated to improve the ZTC growth, resulting in high-quality samples with continuous single-layer carbon structures.
Article
Electrochemistry
Ashwini Kumar Sharma, Erik Birgersson, Feng Pan, Qing Wang
ELECTROCHIMICA ACTA
(2017)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.