ACS Catalysis
·
2024
·
IF 11.3
Xiashuang Luo,Cehuang Fu,Shuiyun Shen,Xiaohui Yan,Liuxuan Luo,Junliang Zhang
A comprehensive understanding of the intricate surface environments of practical nanocatalysts at the atomic level is essential for advancing our knowledge of catalytic mechanisms. In this study, we investigate PtCu octahedral nanoparticles with varying microstrains engineered by Cu dispersion. A detailed analysis of the atom configuration and corresponding microstrain is conducted. The intimate mixing of Cu and Pt results in increased randomness in atom displacement within the lattice and a more pronounced distribution of alternating microstrain on the surfaces. Specifically, we observe that the PtCu concave octahedral nanoparticles with alternating microstrain demonstrate a substantial oxygen reduction reaction (ORR) activity of 3.95 mA cm–2 in area-specific activity. The significant impact of shear microstrain is further underscored, as evidenced by an 86.9% decrease in the ORR activity upon the removal of the alternating shear microstrain. This study sheds light on the effects of microstrain toward the ORR and provides valuable insights into designing advanced Pt-based electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
Heritage Science
·
2024
·Vol. 12
·期 1
·1-13
·
IF 2.6
Wu Huihua,Xie Quanhua,He Yuanyuan,He Xuefeng,Zhou Yuan,Liu Yang,Liu Yufei,Liu Yang,Wan Bo,Zhong Nianbing
Temperature changes during the chemical corrosion of stone cultural relics affect the condensation and evaporation of water and chemical reactions between soluble substances and corrosive solutions. This ultimately leads to changes in the internal structure and composition of the artifacts, which in turn lead to changes in the microstrain of cultural relics. To obtain in-situ real-time information on changes in the temperature and microstrain of stone cultural relics during chemical corrosion damage, a fiber Bragg grating (FBG) detection system was developed. The detection principle for the temperature and microstrain of sandstone was provided. Thermal field emission scanning electron microscopy, X-ray diffraction, and mercury intrusion porosimetry were used to characterize the surface morphology, composition, and pore structure of the sandstone samples, respectively. The temperature and microstrain changes of the sandstone samples under deionized water with different acidic/alkaline and salt solutions and at different temperatures were examined online in situ using the FBG measurement system. The results indicate that the dissolution of sandstone in the acidic solution (H 2 SO 4 and NaHSO 4 ) resulted in an exothermic chemical reaction as well as the dissolution of sandstone in the neutral salt solution (Na 2 SO 4 ) and alkaline solution (NaOH and Na 2 CO 3 ) led to material conversion and exothermic chemical reaction; the deionization reaction belongs to the dissolution reaction. The NaHSO 4 solution caused the most serious corrosive disease on the sandstone surface. When the temperature of the NaHSO 4 solution was 60 °C, the temperature and microstrain of the sandstone reached 63.9 °C and 253.6 με, respectively. The results of this study can support the research of revealing the corrosion mechanism of sandstone in different environments.
研究领域:
文物保护
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 3
·2306176
·
IF 19
Qingren Zhang,Tongtong Liu,Hengyu Guo,Yanan Chen,Yajing Di,Zhengping Zhang,Feng Wang
Pyrochlore ruthenates are highlighted as candidates to replace iridium oxide as oxygen evolution reaction (OER) electrocatalyst, but their designable geometric configurations and composition modulations are hampered by the high-temperature (≈1100 °C) and long-time calcination (more than 12 h), which further decreases the technical and economic feasibility. In this work, an energy- and time-saving approach is proposed to prepare pyrochlore yttrium ruthenate at a much lower calcination temperature (600 °C) and shorter calcination time (6 h) just by inducing A-site substitutions of lead ions (YPRO). The local microstrain derived from Pb provides the surficial compression and extra driving force to overcome the strain energy of phase-transition resistances and the obtained low-temperature YPRO exhibits enriched pores, deficient geometries, shortened Ru─O bond, and enlarged Ru─O─Ru bond angle, which further modify the electronic structure, involving of the rearranged band alignment and the eliminated bandgap. The regulated morphologic, geometric, and electronic structures in YPRO synergically boost the electrocatalytic OER performance (4.8-fold and 30.0-fold enhancements compared with pyrochlore yttrium ruthenate and commercial iridium dioxide (IrO 2 ), respectively) in universal pH conditions. This substitution-induced strain engineering on phase transition should also be effective for other high-temperature materials and trigger their diverse intriguing properties.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Jiayu Xie,Ying Zhang,Huajun Wang,Gang Li,Wenfeng Qin,Chuanxi Lin,Ronghui Guo
Ice formation seriously affect helicopter flight performance, and serious ice accumulation will greatly threaten helicopter travel safety. To avoid the complex measures for surface ice protection and achieve integration, in this work, an ice defense membrane that based on polypyrrole (PPy) modified Ti 3 C 2 T x (MXene) and polydimethylsiloxane (PDMS) encapsulation was proposed. The test results show that membrane integrate the hydrophobicity (Contact angle could reach to 140.1°), dual-drive thermal property (Temperature of membrane could arrive at 116℃ and 68.3℃ at 7 V voltage supply and 100 mW/cm 2 near-infrared radiation, respectively), and micro-strain sensibility (0.05 % tiny strain for membrane could be sensed). Membrane with multifunction and high-integration can be effectively used in ice management. Anti-icing, deicing and ice detection tests were carried out to confirm the efficiency in passive anti-icing, active deicing, and ice formation detection. Moreover, an intelligent ice defense system based on the membrane and hardware circuit has been designed. This work puts forward a membrane with multifunctional integration for ice defense, which could powerfully deal with the icing problem for the aviation field in the future.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Xian Xie,Wei Zhang,Yanzhuo Gou,Pan Deng,Kai Zhang,Shihao He,Jinhua Li,Sujuan Hu,Xianbao Wang,Liangyou Lin
The presence of strain can affect the performance of perovskite solar cells, but strain is often unavoidable in the preparation of perovskite solar cells (PSCs). Herein, 4,5-dichloroaniline-2-sulfonic acid (DCSA) served as a passivator to treat the SnO2 electron transport layer, which led to a reduction of trap states in the SnO2 film and enhanced the energy level alignment between the SnO2 and perovskite layer. The −Cl in DCSA effectively interacts with the uncoordinated Sn4+ that fills the oxygen vacancy sites on the surface of SnO2. Meanwhile, the −SO3H functional group in DCSA interacts with the uncoordinated Pb2+ in perovskite, thus retarding the nonradiative recombination process. These interactions eventually contribute to the decrease in lattice strain within the device. The optimized device achieved a champion power conversion efficiency of 23.32% and retained above 90% of its initial PCE value after 1032 h of storage under ambient conditions without encapsulation.
研究领域:
材料科学
·
能源技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Qin Du,Cheng Zhu,Zixi Yin,Guangren Na,Chuantong Cheng,Ying Han,Na Liu,Xiuxiu Niu,Huanping Zhou,Hongda Chen,Lijun Zhang,Shengye Jin,Qi Chen
Organic–inorganic hybrid halide perovskites (ABX3), especially layered 2D perovskites, have been recognized as promising semiconductors due to their tunable crystal structure and unique optoelectronic properties. A-site cations, as spacers, allow various metal halide assemblies, but the stacking pattern and the influence of their collective behavior on the properties of the resultant materials remain ambiguous. Here, the cation-stacking effects in the 2D perovskite single crystals, with a focus on the electron–phonon interaction, are investigated. We reveal the different photoluminescence from the surface region and the interior of the crystal, which is due to the residual strain induced by A-site cation stacking. We also examine the cation-stacking effects on the electron–phonon interaction, which is further employed to tailor the optoelectronic properties of the resultant 2D crystals. By reducing the microstrain, we reduce the electron–phonon coupling to improve the mobility and their stability against electric field in the corresponding crystals. Our study suggests a way to manipulate the optoelectronic properties in 2D perovskite materials by rational design of cation stacking.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Kechun Guo,Wenzhuo Zhu,Jian Wang,Wen Sun,Shuai Zhou,Ming He
A gradient anisotropic cellulose hydrogel was prepared by the diffusion of CaCl 2 solution. The degree of orientation of the cellulose chains decreased along the ion diffusion direction, and the birefringence of the highly oriented area was up to 1.323×10 −4 . Importantly, we first propose and demonstrate the presence of sensitive region in the gradient anisotropy hydrogel. The sensitive region located in the order-disorder transition displayed large color variation with the optical path difference (R) range from 155 nm to 1200 nm, high sensitivity (1 % strain interval), low detection (minimum 1 % strain), good cycling ability of 50 times and frost resistance at −20℃. Based on this, the readable response colorimetric card was designed for micro-strain detection. The programmable Ca 2+ diffusion design made it convenient to fabricate cylindrical and tubular hydrogels. This concept of sensitive region and this flexible strategy will broaden new horizons to materials that have excellent responsive properties for optical applications, sensors and multiscale bionics architectures.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xingyu Zhou,Dahui Sun,Shanshan Zhao,Junhui Jiang,Junbo Dang,Ruifu Lv,Guibin Wang,Mei Zhang
The aim of this work is to explore the potential application of three-dimensional (3D) needle-punched carbon fiber/poly(ether ether ketone) (CF/PEEK) composites in the field of fractures internal fixation. First, the machinability of 3D needle-punched CF/PEEK composites was explored through mechanical property tests on drilled composite samples; subsequently, the microstrain of composite bone plates at different stages of fracture healing was verified in an in vitro simulation of tibia fracture internal fixation model and compared with titanium alloy bone plates; finally, thinking of the potential debris dropout and exposure of carbon fibers that may occur after implantation of the bone plates in vivo and biocompatibility in vitro tests were conducted. After the above experiments, it can be seen that the composites can still maintain 60% of their ultimate tensile strength and 85% of their ultimate flexural strength after drilling, and the strains in all parts of the composite bone plate are higher than those of the titanium alloy bone plate in all periods of fracture healing, with the maximum being higher than 180%. In addition, debris dropout and exposure of carbon fibers of the composite bone plate will not affect osteoclast activity and will not excessively stimulate immune-inflammation reactions. In this work, we verified 3D needle-punched CF/PEEK composites’ feasibility as bone plates for internal fixation of fractures, providing a direction for the development of composite bone plates.
研究领域:
生物医学工程
·
材料科学
·
骨科医学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Hang Yang,Dong Tu,Yi Wei,Xinru Huang,Haonan Ju,Wei Wang,Fan Xia,Xiuguo Chen,Guogang Li
Owing to the unique mechano-optical response, mechanoluminescence (ML) materials possess dynamic, sensitive, visual, and recoverable strain sensing capabilities. However, the dilemma of lacking outstanding ML materials with high detection precision under micro deformations still exists, thereby hindering advanced applications in multi-angle and multidimensional scenarios. Herein, a novel Pr 3+ -doped perovskite oxide (NaTaO 3 :Pr 3+ )-based composite elastic thin film is developed, which achieves ultrasensitive ML responses to both microscale compressive and tensile strains. Compared with the record of LiTaO 3 :Tb 3+ , the corresponding deformation detection limit has been improved by five times, reaching 0.01%, which is comparable to the performance of the widely used piezoresistive and capacitive sensors. The results reveal that the ML originates from the interaction between adjacent defects and the varying local piezoelectric fields near Pr Na O 9 and Pr Ta O 6 polyhedra. Most notably, the strain and ML demonstrate identical distributions on a 3D-printed model coated with NaTaO 3 :Pr 3+ thin film even under micro deformation less than 0.4%, highlighting the significant potential of NaTaO 3 :Pr 3+ for advanced 3D microstrain sensing applications. This work provides convincing insights into the investigation of ML mechanisms through local trap and piezoelectricity analyses, along with an exemplificative application in advanced strain sensing and visualization at microscopic and multidimensional scales.
研究领域:
材料科学
·
纳米科技
·
固态物理
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Hang Yang,Yi Wei,Haonan Ju,Xinru Huang,Jun Li,Wei Wang,Dengfeng Peng,Dong Tu,Guogang Li
Elastico-mechanoluminescence technology has shown significant application prospects in stress sensing, artificial skin, remote interaction, and other research areas. Its progress mainly lies in realizing stress visualization and 2D or even 3D stress-sensing effects using a passive sensing mode. However, the widespread promotion of mechanoluminescence (ML) technology is hindered by issues such as high stress or strain thresholds and a single sensing mode based on luminous intensity. In this study, a highly efficient green-emitting ML with dual-mode stress-sensing characteristics driven by microscale strain is developed using LiTaO 3 :Tb 3+ . In addition to single-mode sensing based on the luminous intensity, the self-defined parameter ( Q ) is also introduced as a dual-mode factor for sensing the stress velocity. Impressively, the fabricated LiTaO 3 :Tb 3+ film is capable of generating discernible ML signals even when supplied with strains as low as 500 µst. This is the current minimum strain value that can drive green-emitting ML. This study offers an ideal photonic platform for exploring the potential applications of rare-earth-doped elastico-ML materials in remote interaction devices, high-precision stress sensors, and single-molecule biological imaging.
研究领域:
材料科学
·
光电子学
·
传感器
·
生物医学工程
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2025
·
IF 7.4
Zhang Tao,Wang Xin,Song Wanqing,Feng Jiahui,Yang Xinyi,Wang Haozhi,Ding Jia,Hu Wenbin
Alloying Pt with non-noble metals is effective for optimizing the activity of Pt-based electrocatalysts. However, the development of high-activity and stable hydrogen electrocatalysts remains challenging owing to the random elemental distribution and weak interatomic bonding in alloys. Herein, we reported a Pt 2 CoNi intermetallic nanocatalyst rich in surface microstrain for high-performance hydrogen electrocatalysis. The superlattice ordering crystalline structure ensures the specific positions of atoms in this nanocatalyst, resulting in the alternating arrangement of Pt and Co/Ni atoms. In one nanoparticle, multiple Pt 2 CoNi grains are arranged along different grain orientations, which generates abundant surface microstrain due to the discrepancy of intermetallic lattice parameters. The unique crystal structure effectively modulates the electron distribution of Pt 2 CoNi intermetallic nanocatalyst. The active sites of this nanocatalyst exhibit downshifted d-band centers, leading to accelerated hydrogen adsorption/desorption behavior. Resultantly, the Pt 2 CoNi intermetallic nanocatalyst demonstrates impressive bifunctional hydrogen electrocatalytic capabilities for hydrogen evolution reaction (mass activity of 1.02 A/mg Pt and η 10 variation of 3.7 mV after 10,000 cycles) and hydrogen oxidation reaction (kinetic mass activity of 4.08 A/mg Pt and 97.3% activity retention after 12 h operating at 0.1 V vs. RHE). This work provides a promising route for the development of efficient nanocatalysts with ingenious crystal structures.
研究领域:
纳米催化剂
·
电催化
·
材料科学
·
氢能
·
金属间化合物
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Guangmeng Chen,Ming Mu,Wenjie Yu,Li Jia,Ziqiang Hu,Weiwei Zhao,Xiaoqing Liu
Flexible sensors in practical applications require them to show sufficiently high sensitivity over wide sensing ranges, however, there always exists a trade-off. Herein, we address the aforementioned challenging through the geometric innovation of laser-induced graphene (LIG) conductive paths. A liquid benzoxazine (PGE-fa) precursor is developed to enable the in-situ LIG fabrication on PDMS substrates, eliminating the conventional transfer-induced defects. Furthermore, a dual architecture integrating straight and serpentine LIG patterns in parallel synergistically resolves the sensitivity-range paradox, where the straight segments bear high sensitivity (GF = 68.98 at 1% strain) for micro-strain detection (0.05–10%), while the serpentine components maintain conductivity for large-strain tolerance (up to 30%). It is revealed that the cracks appear in straight LIG line under small deformations, resulting in resistance change to guarantee high sensitivity, whereas the serpentine LIG line can dissipate stress through in-plane bending and rotational deformation, and therefore, contribute to the conductive path to accommodate broad strain range. In addition, the sensor exhibits exceptional performance of rapid response/recovery (180/200 ms), ultralow detection limit (0.05% strain), and 5,000-cycle durability. Experimental validations in pulse waveform analysis, blink detection, joint motion monitoring, and Morse code-based human-machine communication collectively demonstrate the sensor's versatility across diverse physiological and biomechanical sensing scenarios. It is believed that the intelligent structural design in this work is attractive for the development of high-performance wearable systems in personalized healthcare.
研究领域:
材料科学
·
纳米技术
·
传感器技术
·
生物医学工程
·
柔性电子学
·
人机交互
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）