Article
Optics
Li Wan, Yizhou Liu, Matthew J. Fuchter, Binghai Yan
Summary: Researchers have discovered that the handedness of circularly polarized light in OLEDs can be switched by reversing the current flow. This direction-dependent emission greatly increases the polarization rate and addresses the issue of symmetry loss in CP-OLEDs. The anomalous CP emission is attributed to the topological electronic property known as orbital-momentum locking in chiral materials.
Article
Chemistry, Inorganic & Nuclear
Meng Wang, Jiayu You, Cunyun Xu, Jun Dong, Chuanyao Luo, Qunliang Song, Sam Zhang
Summary: The article introduces a simple method to improve the performance of Q-2D perovskite solar cells by adding 3D perovskite powder to the precursor solution. This enables the formation of a uniform and closely connected heterostructure with distributed large-n phases, thereby promoting charge transfer.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Zebang Zhao, Jixin Jiang, Jun Guan, Qingyuan Qiao, Dandan Song, Zheng Xu, Bo Qiao, Wageh Swelm, Ahmed Al-Ghamdi, Suling Zhao
Summary: This study presents a simple solution preparation method for efficiently stacking multilayer blue OLEDs. The process involves stamping different polymer films formed via spontaneous spreading (SS) on the water surface. By adjusting the mixing ratio of organic substances in SS films, the properties of the films can be effectively regulated to optimize the performance of blue OLEDs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Mechanical
Sergej Hloch, Kamil Soucek, Jaroslava Svobodova, Monika Hromasova, Miroslav Muller
Summary: This article analyzes the subsurface deformation effects of materials caused by the periodic action of liquid droplets. X-ray micro-CT and SEM analysis were used to study the subsurface deformation and the formation of cavities. The results suggest that lateral jetting after droplet collapsing leads to the formation of hydrodynamic tunnels in the material.
Article
Nanoscience & Nanotechnology
Panlong Yu, Xiaoxiang Zhu, Jialin Bai, Wenyu Ji, Hanzhuang Zhang
Summary: This study demonstrates that transient electroluminescence spectroscopy with quantum-dot light-emitting diodes as the platform is a feasible and reliable method to evaluate the carrier mobility of amorphous organic films. The position of the exciton formation zone is precisely determined and the electrical field intensity across the organic layer is evaluated, allowing for the determination of the charge carrier mobility.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Geosciences, Multidisciplinary
A. Spang, M. Burton, B. J. P. Kaus, F. Sigmundsson
Summary: This study uses numerical modeling results to quantify the ground deformation caused by volatile reservoirs, highlighting the crucial role of volatile-driven buoyancy in volcano deformation and the significant impact of shallow volatile accumulation and release on ground deformation of volcanoes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Applied
Licheng Liu, Yawei Miao, Mengde Zhai, Tai Wu, Xingdong Ding, Haoxin Wang, Cheng Chen, Yong Hua, Li Guo, Ming Cheng
Summary: In this paper, a new electron donor ACR-Cz-DM is reported, which significantly improves the performance of perovskite solar cells. ACR-Cz-DM is constructed based on ACR and Cz-DM, exhibiting excellent hole mobility and conductivity, as well as good film formation and outstanding charge extraction and transport ability. The photoelectric conversion efficiency (PCE) of FAPbI3-based PSCs using ACR-Cz-DM as the electron donor reaches 21.37%, surpassing that of Spiro-OMeTAD-based PSCs (20.10%) under the same conditions.
Article
Chemistry, Physical
Hui Bao, Cuili Chen, Yongqi Cao, Shuai Chang, Shuangpeng Wang, Haizheng Zhong
Summary: In this study, the charge accumulation and recombination in an operational QLED were quantitatively determined using time-resolved electroluminescence (TREL) spectroscopy. Time-resolved current (TRC) measurement was introduced and simulated using an equivalent circuit model, including a series resistance, a parallel resistance, and a capacitance. The key processes in a typical TREL spectra were modeled, and the stages of delay, rising, and decay were correlated to charge accumulations, charge injection and recombination, and charge release and recombination, respectively. The electroluminescence recombination rate was derived by fitting the rising stage curves in the TREL spectra, providing an intrinsic parameter of the emissive materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Multidisciplinary Sciences
Shihao Liu, Jiaming Zhang, Chunxiu Zang, Letian Zhang, Wenfa Xie, Chun-Sing Lee
Summary: In this study, long-distance hole diffusion was achieved in a PEDOT:PSS layer, improving the current balance between electron and hole transport regions in conventional OLEDs. By introducing a lateral hole diffusion layer on the anode side, reduced carrier accumulation, improved efficiency, and enhanced operation stability were demonstrated.
Article
Chemistry, Multidisciplinary
Tao Li, Bin Li, Haoxiang Zhou, Jun Wang, Gang Ni, Wanli Ma, Chuanxiang Sheng, Jianyu Yuan, Haibin Zhao
Summary: This study reports on the ultrafast dynamics of charge transfer and exciton dissociation in single-material organic solar cells for the first time. It is found that the intramolecular interface in the block copolymer has a higher transfer rate, and the dilute PBDB-T-b-PTY6 film has faster exciton dissociation. By optimizing ordering, the power conversion efficiency of organic solar cells can be improved.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Yunpeng Yan, Rudy Helmons, Michael Carr, Craig Wheeler, Dingena Schott
Summary: A convex pattern surface is proposed and optimized to reduce sliding wear of bulk handling equipment. The surface deformation of the convex pattern sample is modelled to investigate its effectiveness in reducing sliding wear. The simulation results show that the wear volume of a plain sample has a linear relationship with simulated revolutions, while the convex pattern sample has a quadratic trend. The contact behavior demonstrates that the convex pattern facilitates particle rolling and reduces sliding distance.
Article
Chemistry, Multidisciplinary
Yong-Chao Wu, Jin-Ming Liu, Wei Xie, Qing Yin, Jian-Li Shao
Summary: In this study, atomistic simulations were used to investigate the deformation and damage mechanism of single-crystal aluminum nanorod during nanoscale penetration. High-speed bullet impacts were found to cause high pressure and temperature, promoting localized plastic deformation and solid-liquid phase transformation. The number of fragments generated during the penetration increased with the incident velocity, following a power law damping in size distribution.
Article
Energy & Fuels
Jinxia Liu, Jianyu Liu, Zhiwen Cui, Tribikram Kundu
Summary: This study examines the behavior of multipole wavefields in cased holes under axial stress. The results show that the phase slowness of Stoneley, flexural, and screw waves decreases with increasing axial compressive stress. The arrival times of the full waveforms decrease and the amplitudes increase as well. Additionally, the excitation curves of flexural and screw waves shift to low frequencies with increasing stress in soft formations, which is different from open holes.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Chemistry, Multidisciplinary
Lixun Cheng, Yaoling Shen, Pengfei Nan, Chuanqiang Wu, Yilin Tai, Xiaonan Luo, Yongsheng Zhang, Binghui Ge
Summary: In this study, the microstructure evolution of Na2Ti3O7 anode material was observed at the atomic scale using advanced electron microscopy techniques. Anisotropic amorphization was successfully observed, and a phase transition pathway involving a new phase, Na2Ti24O49, was proposed. It was also found that the amorphization is influenced by surface energy and electron dose rate.
Article
Nanoscience & Nanotechnology
Zhaohua Zhu, Yang Li, Zhiqiang Guan, Yan Wu, Zixin Zeng, Sai-Wing Tsang, Shihao Liu, Xiao Huang, Chun-Sing Lee
Summary: By inserting a CsAc layer between the HTL and the hole-dominant perovskite layer, the performance of PeLEDs can be improved by suppressing exciton quenching and enhancing the photophysical properties of the perovskite film.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Kanglong Hui, Wei Dong, Jipeng Fu, Mingxue Tang, Qi Wei, Chengyu Li, Hongjie Zhang
Summary: Non-toxic rare earth composite materials with Na-doped y-Ce2S3 and CePO4 coating were successfully synthesized, showing improved colorant and thermal stability performance.
JOURNAL OF RARE EARTHS
(2022)
Article
Optics
Xiaowei Zhang, Su Zhang, Xiaodong Li, Tao Tan, Haiyan Wu, Weihong Yuan, Ran Pang, Lihong Jiang, Chengyu Li, Hongjie Zhang
Summary: Non-contact luminescence temperature measurement technology has great application potential in various fields. By studying the photoluminescent properties of Nb5+ and Sm3+ ions, it was found that the fluorescence intensity ratio between them can be used as a temperature detecting signal. The co-doped YTaO4 phosphors may be used as optical temperature sensors.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiaowei Zhang, Su Zhang, Xiaodong Li, Tao Tan, Haiyan Wu, Jiangyue Su, Weihong Yuan, Ran Pang, Lihong Jiang, Da Li, Chengyu Li, Hongjie Zhang
Summary: The study investigates the luminescent characteristics of Pr3+ ions and the development of new luminescent materials. Results show that the luminescence properties of Pr3+ are influenced by its concentration, and different quenching mechanisms exist. Additionally, adjusting the doping concentration of Pr3+ can alter the color gamut of the compound.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Juanjuan Su, Qiannan Sun, Shen Lin, Shuang Lu, Qian Zhang, Yuanxin Li, Bo Li, Yao Sun, Kai Liu, Hongjie Zhang, Fan Wang, Jingjing Li, Yan Wei
Summary: A new type of biosynthetic and unfolded protein nanocarrier has been developed, which efficiently loads and delivers a variety of chemotherapeutic agents for oral squamous cell carcinoma (OSCC) therapy. This versatile formulation strategy improves efficacy, bioavailability, and safety of chemotherapeutics while mitigating off-target side effects.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Meng Zhao, Jing Wang, Xiao Wang, Jing Xu, Li Liu, Weiting Yang, Jing Feng, Shuyan Song, Hongjie Zhang
Summary: This study reports an unconventional galvanic replacement reaction that fabricates a unique hierarchical structure of Fe3O4-CeO2 bimetallic nanotubes covered by Fe2O3 ultrathin nanosheets. The addition of CeO2 stabilizes Fe2+ cations, leading to remarkably enhanced NH3 yield rate and Faradaic efficiency. The hierarchical feature enhances electrode-electrolyte contact, while the generation of Fe2O3-Fe3O4 heterogeneous junctions optimizes the reaction pathways.
Article
Chemistry, Multidisciplinary
Kelu Zhao, Bo Li, Yao Sun, Bo Jia, Jing Chen, Wenhao Cheng, Lai Zhao, Jingjing Li, Fan Wang, Juanjuan Su, Jing Sun, Bing Han, Yawei Liu, Hongjie Zhang, Kai Liu
Summary: A new type of biosynthetic protein bioadhesives with superior adhesion performance has been reported. They are designed and biosynthesized to react with aldehyde cross-linkers to achieve in situ strong adhesion. The obtained bioadhesives show ultra-high adhesion strength and possess great potential for wound closure, wound repair, and noncompressible hemorrhage treatment.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yang Liu, Rui Niu, Ruiping Deng, Shuyan Song, Yinghui Wang, Hongjie Zhang
Summary: Immunotherapy is a promising treatment strategy for tumor regression, but it has low response rates due to the lack of immunogenicity in tumor cells. This study presents a strategy to enhance the immunogenicity of tumor cells by inducing cascade immunogenic tumor ferroptosis. A nanoplatform was developed to trigger lipid peroxidation and activate ACSL4, resulting in irreversible cascade immunogenic ferroptosis. This approach could overcome the limitations of current immunotherapy.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Xin Yuan, Ni Wu, Zhiyong Guo, Hongbing Zhan
Summary: In this study, a novel 1D COF (FZU-68) was reported, which exhibited high specific surface area, narrow pore size distribution, and remarkable chemical/thermal stability. The fluorescence of FZU-68 was quenched in response to trace amounts of water due to water-induced enol-keto isomerization in its structure. This research not only demonstrates the feasibility of integrating heteroatoms and functional groups into 1D COFs but also sheds light on the application prospects of COFs in the field of chemical sensing.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shichao Yang, Wenwei Chen, Baisheng Sa, Zhiyong Guo, Jingying Zheng, Jiajie Pei, Hongbing Zhan
Summary: Triggered by the expanding demands of semiconductor devices, strain engineering of two-dimensional transition metal dichalcogenides (TMDs) has garnered considerable research interest. Through steady-state measurements, strain has been proved in terms of its modulation of electronic energy bands and optoelectronic properties in TMDs. However, the influence of strain on the spin-orbit coupling as well as its related valley excitonic dynamics remains elusive. Our findings demonstrate the effect of strain on the excitonic dynamics of monolayer WS2 and suggest that the spin-flip process is strain-dependent, providing a reference for the application of valleytronic devices.
Article
Chemistry, Multidisciplinary
Yandong Chen, Yueguang Xue, Wenhao Liu, Shilin Li, Xinlian Wang, Weixian Zhou, Guanghui Zhang, Kai Liu, Hongjie Zhang, Yuliang Zhao, Chunying Chen, Ying Liu
Summary: A wearable sweat-based energy generator (SEG) is designed to directly power up a soft artificial muscle, which generates electricity from sweat based on the redox reaction. The generator shows a maximum power density of 18.3 μW cm-2 at a resistance of 0.3 kΩ with a small amount of sweat (0.2 mL), sufficient to activate the artificial muscles.
Article
Chemistry, Multidisciplinary
Hongyan Ji, Xiao Wang, Xiaoxu Wei, Yuxuan Peng, Shuaishuai Zhang, Shuyan Song, Hongjie Zhang
Summary: Hydrogenolysis is an effective method for converting polyolefins into high-value chemicals. In this study, the activity of CeO2-supported Ru single atoms, nanoclusters, and nanoparticles in LDPE hydrogenolysis showed a volcanic trend. Metal-support interactions and hydrogen spillover effect were identified as the two key factors in the reaction. Only when the balance between these two effects is achieved, as in CeO2-supported Ru nanoclusters, can the hydrogenolysis activity be promoted.
Review
Nanoscience & Nanotechnology
Yusai Zhou, Kai Liu, Hongjie Zhang
Summary: Biomineralization is an attractive pathway for producing high-performance mineral-based biomaterials with hierarchical structures. Many biomimetic mineralized materials have been fabricated for biomedical applications, but there are still significant gaps compared to natural materials, especially in terms of mechanical properties and multiscale structures.
ACS APPLIED BIO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yafang Luo, Zhen Chang, Jiajie Pei, Zhiyong Guo, Hongbing Zhan
Summary: A series of 2D covalent organic frameworks (COF) based on core-substituted naphthalene diimides (cNDIs) were designed and synthesized, with tunable bandgap without global structural changes. The bandgaps of the COFs were found to be related to the electron-donating substituents and varied with respect to the interlayer distances. The presence of electron donor substituents promoted charge delocalization and resulted in a longer charge recombination lifetime.
Article
Materials Science, Biomaterials
Li Yang, Jun Guo, Liwen Wang, Sicheng Tang, Ai-fang Wang, Shengwu Zheng, Zhiyong Guo, Xingjie Zan
Summary: Researchers developed an acid-resistant metal-organic framework (MOF) for efficient oral delivery of insulin. The encapsulated insulin remained stable in the stomach acid environment and was released in the intestine in the form of nanoparticles. The modified delivery vehicle facilitated the transport of insulin through intestinal barriers, resulting in significant oral hypoglycemic effects.
BIOMATERIALS SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Wenjing Wang, Tao Tan, Shangwei Wang, Taixing Tan, Su Zhang, Chengyu Li, Hongjie Zhang
Summary: Phosphors have attracted significant interest as potential optical temperature sensors. A new blue-light stimulated KSr6Sc(SiO4)(4):Eu2+ phosphor with decorative krohnkite-like octahedral tetrahedral chains was successfully synthesized. The phosphor exhibits yellow-orange emission and shows high sensitivity to temperature variation from 200 to 475 K.
DALTON TRANSACTIONS
(2023)
