Article
Engineering, Electrical & Electronic
Naseem Abbas, Jun Kim, Jeongwoo Yeom, Seongmin Lee, Xun Lu, Seok-min Kim
Summary: A monolithic fabrication process for a vertical SiNW gas sensor using glancing angle deposition (GLAD) was proposed in this article, and the performance of the sensor was evaluated via relative humidity measurement. The optimization of Cu TPE fabrication process led to the selection of an oblique angle of 65 degrees and a thickness of 100 nm as the optimum conditions for improved humidity measurement sensitivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Zhaojun Zhang, Nils Lamers, Chen Sun, Crispin Hetherington, Ivan G. Scheblykin, Jesper Wallentin
Summary: This study presents a low-temperature solution process to fabricate free-standing vertically aligned metal halide perovskite nanowires with excellent optical and electrical properties. Blue-green heterostructured nanowire arrays were also successfully demonstrated. The scalable and high-quality fabrication method offers new possibilities for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Yuwei Guan, Chunhuan Zhang, Zhen Liu, Yiman Zhao, Ang Ren, Jie Liang, Fengqin Hu, Yong Sheng Zhao
Summary: Single-crystalline perovskite p-n junction nanowire arrays are demonstrated as ultra-sensitive photodetectors, which possess high crystallinity for efficient carrier transport and form built-in electric fields facilitating effective carrier separation. These results provide new insights into the design and construction of high-performance photodetectors for practical optoelectronic applications.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Junfeng Lin, Yaxin Lv, Kai Song, Xuwei Song, Hongjun Zang, Pingwu Du, Yaping Zang, Daoben Zhu
Summary: Electrophilic aromatic substitution (EAS) is a fundamental reaction in organic chemistry, and using an oriented external electric field (OEEF) instead of traditional reagents can provide an environmentally friendly method to synthesize aromatic compounds. In this work, OEEF-catalyzed EAS reactions in CPPs were demonstrated, showing the feasibility of OEEF catalysis and offering a way to explore new mechanistic principles of classic organic reactions aided by OEEF.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Dae-Young Um, Yong-Ho Ra, Ji-Hyeon Park, Ga-Eun Hong, Cheul-Ro Lee
Summary: This study presents a new approach to incorporate high concentrations of indium in the InGaN structure using a non-polar quasi-quantum dot heterostructure. The results show that this method can not only improve the radiative recombination efficiency of the nanowire structure, but also enhance the crystalline quality, allowing quantum dots to shift the wavelength up to 913 nm. The integration of nanowire and quantum dot structures opens a new avenue to overcome the limitations of high indium incorporation in photonic semiconductor systems.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Physical
Yu Lu, Ling Wang, Mingyue Chen, Yue Wu, Gaofu Liu, Pengcheng Qi, Min Fu, Hao Wu, Yiwen Tang
Summary: The ZnCo2O4/C core-shell nanowire arrays exhibit high specific capacitance and superior cycling stability, showing promising potential for practical applications in high-performance supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Materials Science, Multidisciplinary
Y. J. Wang, Y. L. Tang, Y. L. Zhu, X. L. Ma
Summary: Ferroelectric crystals with switchable polar structures have potential applications in information storage. Nanoscale ferroelectrics exhibit various exotic domain configurations and polar topologies, which can result in high-density memory bits. However, stabilizing polar topologies in ferroelectric materials, especially in nanoscale, is a significant challenge due to the pronounced coupling between polarizations and spontaneous strains.
Article
Chemistry, Multidisciplinary
Dingguo Zheng, Siyuan Huang, Chunhui Zhu, Peng Xu, Zian Li, Hong Wang, Jun Li, Huanfang Tian, Huaixin Yang, Jianqi Li
Summary: The study analyzed the surface plasmonic nearfield structure based on PINEM observations of silver nanowires, revealing plasmon oscillations associated with typical absorption of photon quanta and analyzing the polarization dependence of plasmon wavelength and symmetry properties. By utilizing advanced imaging techniques, the research has implications for future studies of localized-field structures at interfaces and visualization of novel phenomena in nanostructures, nanosensors, and plasmonic devices.
Article
Chemistry, Multidisciplinary
Bumsu Park, Ja Kyung Lee, Christoph T. Koch, Martin Woelz, Lutz Geelhaar, Sang Ho Oh
Summary: Growing an InxGa1-xN/GaN multi-quantum well heterostructure in nanowire form can overcome limitations in conventional planar heterostructure LEDs by relaxing the strain induced in the heterostructure through the sidewalls of the nanowire. This study demonstrates techniques for mapping the complex strain distribution within an In0.3Ga0.7N/GaN MQW heterostructure embedded in a GaN nanowire and provides insights into the strain-induced piezoelectric fields in nanowire LEDs.
Article
Chemistry, Multidisciplinary
Nitish Mathur, Fang Yuan, Guangming Cheng, Sahal Kaushik, Inigo Robredo, Maia G. Vergniory, Jennifer Cano, Nan Yao, Song Jin, Leslie M. Schoop
Summary: In this study, a unique internal interface known as a merohedral twin boundary was discovered in chemically synthesized single-crystal nanowires of CoSi. Scanning transmission electron microscopy revealed that this internal interface is a (001) twin plane connecting two enantiomeric counterparts. Ab initio calculations showed the presence of localized internal Fermi arcs at the (001) twin plane, distinct from external Fermi arcs and bulk states. These merohedrally twinned CoSi nanowires provide an ideal platform for exploring topological properties associated with internal interfaces in Weyl semimetals.
Article
Polymer Science
Jing-Hua Zhao, Bao-Sheng He, Ao-Shen Li, Chao-Nan Wang, Qing-Qing Li, Zhi-Jun Hu
Summary: This study demonstrates a simple and low-cost approach to obtain piezoelectric PVDF films by directly hot-pressing PVDF films sandwiched between chitosan or cellulose films. The electrostatic interactions between PVDF and chitosan or cellulose enable a high content of polar phases and a measured piezoelectric charge coefficient. The findings have important implications for the development of sensors, actuators, and energy harvesters.
CHINESE JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yong-Jun Kwon, Youngki Yeo, Min-Su Kim, Yong-Jin Kim, Heung-Sik Park, Jaegyu Kim, Si-Young Choi, Chan-Ho Yang
Summary: Topological textures of ferroelectric polarizations have potential applications in future information technology. However, energy losses and deviations from stability can affect the symmetry and shape of these textures. In this study, we investigated the domain structure of bismuth tungsten oxide thin films grown on SrTiO3 substrates using advanced microscopy techniques. We discovered a hidden phase with a different polarization orientation that promotes the formation of flux closure domains, bringing us one step closer to an isotropic two-dimensional polar material.
Article
Clinical Neurology
Binney Sharma, Avishek Roy, Trina Sengupta, Lal Chandra Vishwakarma, Anuraag Singh, Ritesh Netam, Tapas Chandra Nag, Nasreen Akhtar, Hruda Nanda Mallick
Summary: Sleep has an impact on both brain function and neuromuscular junction morphology and neurochemistry.
Article
Nanoscience & Nanotechnology
Feng-Hui Gong, Yu-Ting Chen, Yin-Lian Zhu, Yun-Long Tang, Heng Zhang, Yu-Jia Wang, Bo Wu, Jia-Qi Liu, Tong-Tong Shi, Li-Xin Yang, Chang-Ji Li, Yan-Peng Feng, Xiu-Liang Ma
Summary: This work investigates the domain evolution and topological properties of ultrathin PbTiO3 (PTO) films using Cs-corrected scanning transmission electron microscopy (STEM), reciprocal space mapping (RSM), and piezoresponse force microscopy (PFM). It is found that when the thickness of PTO films is less than 6 nm, there is a coexistence of a/c domains and bowl-like topological structures, identified as convergent and divergent types of meron. Abundant 90 degrees charged domain walls are also identified. PFM studies confirm the ferroelectric properties of these ultrathin PTO films.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yanqing Jia, Haibin Guo, Jing Ning, Jincheng Zhang, Dong Wang, Boyu Wang, Haidi Wu, Xue Shen, Chi Zhang, Yue Hao
Summary: The study introduces a high-performance self-variable-voltage light information transmission integrated system to address the complexity of sensing and driving circuits in IoT technology, demonstrating its potential application in low-power, self-powered optical communication transmission systems.
Article
Chemistry, Multidisciplinary
Maciej Klein, Yutao Wang, Jingyi Tian, Son Tung Ha, Ramon Paniagua-Dominguez, Arseniy Kuznetsov, Giorgio Adamo, Cesare Soci
Summary: Emerging immersive visual communication technologies require light sources with complex functionality for dynamic control of light properties. Flat optics based on artificially structured metasurfaces offer a viable solution, but integrating them into electrically driven devices is challenging. This study demonstrates a new approach to monolithic integration of a dielectric metasurface into a perovskite light-emitting transistor, enhancing the electroluminescence intensity and enabling dynamic tunability of polarization. This concept opens up unlimited opportunities for light management strategies based on metasurface design and integration.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jingyi Tian, Giorgio Adamo, Hailong Liu, Mengfei Wu, Maciej Klein, Jie Deng, Norman Soo Seng Ang, Ramon Paniagua-Dominguez, Hong Liu, Arseniy Kuznetsov, Cesare Soci
Summary: A tunable polarization vortex microlaser is demonstrated using a subwavelength-thin phase-change halide perovskite BIC metasurface, which allows reversible and bistable switching between distinct polarization vortexes underpinned by opposite topological charges through perovskite structural phase transitions.
ADVANCED MATERIALS
(2023)
Article
Biophysics
Luan Quang Le, Kaicheng Zhu, Haibin Su
Summary: Understanding prokaryotic cell growth requires a multiscale modeling framework that considers the kinetics pathway of ribosomes and the molecular responses to nutrient conditions. The competitive binding between cognate and near-cognate tRNAs for ribosomes can be modulated by [Mg2+]. A kinetics framework is developed to bridge ribosomal synthesis to cell growth, optimizing the cell growth rate by varying the characteristics of ribosomal synthesis through cellular responses to different nutrient conditions. Experimental measurements show quantitative agreement with two quadratic scaling relations: nutrient flux versus cell mass and ribosomal number versus growth rate.
BIOPHYSICAL JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
N. A. Richter, Y. F. Zhang, M. Gong, T. Niu, B. Yang, S. Xue, J. Wang, H. Wang, X. Zhang
Summary: This study presents a solute synergy strategy to stabilize the microstructures and improve thermal stability in high strength nanotwinned (NT) Al-Co-Zr alloys. Zr solute additions promote microstructural and mechanical stability up to 400 degrees C. In-situ microcompression tests demonstrate high strengths and deformability in these ternary NT alloys. Density functional theory calculations provide insight into the interplay between Co and Zr solute and their role in stabilizing incoherent twin boundaries. This work offers a strategy for enhancing both strength and thermal stability of nanocrystalline materials through synergistic solute pairs.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Bingqiang Wei, Wenqian Wu, Jian Wang
Summary: Ni-SiOC nanocomposites exhibit two characteristic microstructures and display high strength and good plastic flow stability. However, their fracture behavior and plasticity vary under different testing conditions.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Bingqiang Wei, Wenqian Wu, Jian Wang
Summary: Ni-SiOC nanocomposites maintain crystal-amorphous dual-phase nanostructures after high-temperature annealing at different temperatures. Both crystal Ni and amorphous SiOC maintain stability under He irradiation. The amorphous SiOC ceramic is immune to He irradiation damage, contributing to the He irradiation resistance of Ni alloy.
Article
Biochemistry & Molecular Biology
Kalok Chan, Long Thanh Ta, Yong Huang, Haibin Su, Zhenyang Lin
Summary: In this study, a simple molecular representation method was developed using machine learning and artificial intelligence techniques to predict rate constants of aryl bromides in palladium-catalyzed Sonogashira coupling reactions. The results demonstrate the importance of incorporating domain knowledge into machine learning for improved data analysis.
Article
Multidisciplinary Sciences
John P. Hirth, Dongyue Xie, Greg Hirth, Jian Wang
Summary: Type II and IV twins with irrational twin boundaries were studied in plagioclase crystals using high-resolution transmission electron microscopy. It was observed that the twin boundaries relaxed and formed rational facets separated by disconnections, similar to what was seen in NiTi. The topological model (TM) was required for precise theoretical prediction of the orientation of the Type II/IV twin plane, and predictions were also made for other types of twins. The faceting process provided a challenging test for the TM, but the analysis showed excellent agreement with the observations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Nanoscience & Nanotechnology
Tian Zhang, Jie Tang, Shudong He, Fulin Jiang, Dingfa Fu, Jie Teng, Jian Wang
Summary: We experimentally investigated the microstructure evolution and strengthening behaviors of three cold-worked austenitic steels that deform via dislocations, twinning, and stacking faults. It was found that the development of stacking faults and twins acts as kinematical barriers for dislocation motion, which is influenced by stacking fault energy and accumulated dislocations. These factors accelerate the dislocation storage rate, strengthen the alloys, and develop a high strain hardening rate. Therefore, we proposed a nonadditive strengthening equation by combining the dislocation-based two-internal-variable model coupled with kinematical barriers to rationalize the experimental observations.
SCRIPTA MATERIALIA
(2023)
Review
Chemistry, Physical
Bingqiang Wei, Lin Li, Lin Shao, Jian Wang
Summary: Crystalline metals have good deformability but poor strength and irradiation tolerance, while amorphous materials have poor deformability but high strength and good irradiation tolerance. By refining characteristic size, the flow strength of crystalline metals and the deformability of amorphous materials can be enhanced. This leads to enhanced strength and improved plastic flow stability in crystalline-amorphous nanostructures. The high-density interfaces in these nanostructures can trap radiation-induced defects and accommodate free volume fluctuation. This article reviews various crystalline-amorphous nanocomposites and their synthesis, deformation behaviors, and multiscale materials modelling.
Article
Materials Science, Multidisciplinary
Jian Song, Songsong Yao, Quan Li, Jiamiao Ni, Zhuoxin Yan, Kunming Yang, Guisen Liu, Yue Liu, Jian Wang
Summary: Engineering the surface orientation of fcc metals to the {111} plane can enhance their oxidation resistance. In this study, a reconstructed surface layer with the {111} orientation was observed on high-temperature deposited Gr/{001} Cu surface. A surface melting-solidification mechanism dominated by Gr/Cu interfacial energy and promoted by high-temperature surface melting was proposed to explain the surface reconstruction process. These findings suggest a possible strategy to enhance the surface properties of fcc metals through engineering surface crystallography.
Article
Nanoscience & Nanotechnology
Xingchi Xiao, Liang Cheng, Di Bao, Qi Ying Tan, Teddy Salim, Cesare Soci, Elbert E. M. Chia, Yeng Ming Lam
Summary: Singlet fission (SF) materials have been used to improve the power conversion efficiency (PCE) of solar cells. However, SF implementation in perovskite solar cells has not been successful due to the lack of understanding of the SF/perovskite heterojunctions. In this study, the charge dynamics between a well-known SF molecule, TIPS-pentacene, and a triple-cation perovskite Cs-0.05(FA(0.85)MA(0.15))(0.95)PbI2.55Br0.45 were investigated. The results show that there is an electron-transfer process from TIPS-pentacene to perovskite, leading to an increase in carrier density in the perovskite layer. This study confirms the potential of SF-enhanced perovskite solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Fluids & Plasmas
Kaicheng Zhu, Haibin Su
Summary: In this study, a new model is proposed to describe the nucleation-growth dynamics of individual nanocrystals by extending the free energy landscape to include activation-adsorption-relaxation reaction pathways. The crystallization dynamics were simulated using the Monte Carlo method based on the transition state theory. The results reveal a transient quasi-equilibrium stage before nucleation starts and a postnucleation crossover regime where the dynamic growth exponents asymptotically converge towards classical limits. Power laws are also generalized to address the dimension and scale effects for the growth of large crystals.
Article
Chemistry, Multidisciplinary
Jiawei Zheng, Xinjun He, Yuniu Zhang, Benzheng Lyu, Jinwook Kim, Shiang Li, Xinhui Lu, Haibin Su, Wallace C. H. Choy
Summary: Solution-processed top electrodes using metallic nanoparticles have been proposed for the large-scale industrialization of organic solar cells (OSCs). A compact-packing-enabled fabrication approach is introduced for the efficient stacking and sintering of metallic nanoparticles, leading to high conductivity and high reflectance top electrodes. The use of gallic acid-assisted silver nanoparticles (AgNPs) results in high-quality AgNP films with uniform particle size distribution and superior storage stability, enabling the achievement of a record high efficiency of 14.69% for large-area solution-processed OSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Kaicheng Zhu, Saber Naserifar, William A. Goddard, Haibin Su
Summary: In this work, detailed atomistic simulations were performed to investigate the dynamic properties of supercooled water. The analysis revealed multiscale features in the transient relaxation dynamics, with classical Langevin behavior dominating at fast timescales and two different activation barriers at long timescales. The modulation of the entropy spectrum by temperature was explained using a three-state model that involved a topological transition of the hydrogen-bond network. The quantitative characterization of the network topology provided valuable insights for further studies on the transient relaxation dynamics of supercooled water.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
