JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 11
·113505
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IF 3.721
Yuan Yuan,Dan Zhang,Feihu Zhang,Chunhui Yang,Yang Gan
Electropolishing of aluminum (Al) has been applied to form surface nanopatterns of various morphologies and sizes. However, the effect of crystallographic orientation on nanopattern morphology and size in electropolished Al is unclear. Here, annealed polycrystalline and monocrystalline Al samples were electropolished at 40 V in an electrolyte of perchloric acid, ethanol, butyl cellusolve and water, the correlation between crystallographic orientation and nanopattern morphology and size was firmly established through systematic EBSD and SEM examination. Heterogeneity in nanopattern morphology and nanopattern size is induced by crystallographic anisotropy of grains. Nanopattern morphology and size change gradually for grains and planes oriented with varying misorientation angles against each primary direction [101]//ND, [101]//ND and [111]//ND. The transitions between nanopattern morphologies also occur for grain surface planes with near identical misorientation angles. The surface structure sensitivity of nanopattern morphology and size was firmly established and then qualitatively explained by invoking step-terrace and step-ledge surface structure models and by developing a refined adsorption-diffusion perspective based on a reported theoretical model. The findings reported here contribute significantly to gaining new insights into the crystallographic orientation dependence of nanopattern morphology and nanopattern size in electropolished Al and other metals.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xiaowei Xie,Juanjuan Xing,Dongli Hu,Hui Gu,Cheng Chen,Xiangxin Guo
The garnet ionic conductor is one of the promising candidate electrolytes for all-solid-state secondary lithium batteries, thanks to its high lithium ion conductivity and good thermal and chemical stability. However, its microstructure is difficult to approach because it is very sensitive to the inquisitive electron beam. In this study based on a scanning electron microscope (SEM), we found that the electron beam expulses the lithium out of Li6.4La3Zr1.4Ta0.6O12 (LLZTO), and the expulsed zone expands to where a stationary beam could extend and penetrate. The expulsion of metallic lithium was confirmed by its oxidation reaction after nitrogen inflow into the SEM. This phenomenon may provide us an effective probe to peer into the conductive nature of this electrolyte. A frame-scan scheme is employed to measure the expulsion rate by controllable and more uniform incidence of electrons. Lithium accumulation processes are continuously recorded and classified into four modes by fitting its growth behaviors into a dynamic equation that is mainly related to the initial ion concentration and ion migration rate in the electrolyte. These results open a novel possibility of using the SEM probe to gain dynamic information on ion migration and lithium metal growth in solid materials.
研究领域:
材料科学
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电化学
·
显微分析
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2025
·
IF 4.2
Yang Yang,Xuemei Wei,Shuya Zhang,Yun Li,Jiazhen Wu,Suhua Cai,Biren Wang,Zhiming Yang,E. Yang,Junling Cao,Qinhua Chen,Guihong Chen
Background: Aconiti Lateralis Radix Praeparata (Fuzi), a vital yet toxic herbal medicine, faces significant challenges in standardization due to varied processing methods that undermine detoxification efficacy and hinder therapeutic optimization.Methods: An integrative analytical approach combining scanning electron microscopy (SEM), X-ray diffraction (XRD), metabolomics, and pharmacodynamic evaluation was employed to investigate the structural, compositional, and functional transformations during Fuzi processing.Results: SEM imaging and XRD data revealed that the morphological breakdown of starch granules varied according to processing technique. Metabolomics analysis based on mass spectrum identified 57 diterpenoid alkaloids, including 12 bioactive components, whose levels fluctuated across nine processing variants. Pharmacodynamic profiling revealed distinct efficacy-safety trade-offs across these variants, underscoring the pivotal role of processing methods in determining clinical risk profiles and therapeutic indices.Conclusion: This study elucidated the structure-composition-efficacy correlations in Fuzi processing, highlighting the relationship between starch reorganization, alkaloid modification, and therapeutic outcomes. These insights offer a mechanistic basis for refining traditional processing protocols, optimizing detoxification and therapeutic retention, and advancing standardization in herbal medicine.
研究领域:
中药炮制学
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天然药物化学
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代谢组学
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药效动力学
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晶体学
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植物药标准化
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药物安全性评价
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Jing Song,Xueqi Cao,Zixuan Zhang,Jingui Li,Pengyu Zhang,Yufeng Zhao,Conghui Cao,Li Wang,Peijie Ma,Jiawen Xiao,Linlin Liu,Huanzhen Zhang,Yadi Zhai,Lihua Wang
Water vapor plays a pivotal role in both the crystallization of CsPbBr-based perovskites and the operational stability of devices incorporating these materials. However, previous studies on this topic have been limited to indirect ex situ observation. Here, we utilize in situ environmental scanning electron microscopy (ESEM) to directly monitor the dynamic growth of CsPbBr-based perovskite at a water vapor pressure of 609 Pa (equivalent to 75% relative humidity at 4 °C) under a controlled gas atmosphere. Our real-time in situ observation captures the concomitant and direct crystallization of CsPb 2 Br 5 and CsPbBr 3 , challenging the conventional phase-transition-mediated formation pathway. Furthermore, we demonstrate that the dual emission in the mixture of CsPbBr 3 and CsPb 2 Br 5 originates from distinct emissive centers, in contrast to the self-absorption and re-emission mechanism in rod-like CsPbBr 3 . These findings offer direct evidence of water-vapor-mediated crystallization and their impact on material performance, thereby paving the way for both the design of environmentally stable perovskite-based devices and future ESEM investigations into complex multiphase processes.
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DOI
高影响因子
Applied Sciences-Basel
·
2019
·Vol. 9
·期 5
·956
·
IF 2.217
Huifeng Shi,Xianqiang Liu,Rui Wu,Yijing Zheng,Yonghe Li,Xiaopeng Cheng,Wilhelm Pfleging,Yuefei Zhang
In situ scanning electron microscopy (SEM) offers a good way to investigate the structural evolution during lithiation and delithiation processes. In this paper, the dynamical morphological evolution of 3D-line-structured/unstructured Si/C composite electrodes was observed by in situ SEM. The investigation revealed the microstructural origin of large charge capacity for 3D-line-structured anodes. Based on this proposed mechanism, a coarse optimization of 3D-line-structured anodes was proposed. These results shed light on the unique advantages of using an in situ SEM technique when studying realistic bulk batteries and designing 3D electrode structures.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
·
固体物理
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yanjia Liu,Tingting Bai,Daohong Wu,Maojun Yao
Metal ions can promote the aging of Baijiu and improve its sensory quality. However, the aging mechanism mediated by metal ions remains unclear. The content of esters, alcohols, and pH decreased while the acids content, viscosity, and conductivity increased after adding metal ions. 20 kinds of aroma components were identified in Baijiu including esters, acids, alcohols, and aldehydes by Gas chromatography-mass spectrometry (GC–MS). Spectroscopy and electrochemical analysis demonstrated that Fe 3+ has a higher affinity than Cu 2+ for the flavor compounds, and both Fe 3+ and Cu 2+ exhibit stronger affinity with acids than corresponding esters. Scanning Electron Microscope (SEM) demonstratesd that Baijiu can form lamellar, spherical, flower-like, and crystal-like morphology during aging. The colloidal particles exhibit different elemental composition according to Energy Dispersive Spectrometer (EDS). These results indicated Baijiu aging is regulated by transition metal ions, thereby providing a theoretical foundation for Baijiu aging by selecting appropriate aging medium and storage conditions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Wu Huizhen,Liu Zhi,Zhang Hu,Xie Shuangnan,Tang Chao,Liu Wei,Li Bin,Chen Piao,Zhang Zihong,Qian Mingrong
Endogenous SEM (SEM end ) naturally occurs in crustacea aquatic products, it confuses the legal verdict of exogenous SEM (SEM ex ) degraded by antibiotic nitrofurazone abuse. In the present study, compound-specific gas phase chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) analysis coupled with a two-step pre-column derivatization was developed for determining the nitrogen stable ratio (δ 15 N) of SEM in shrimp and crab. The optimal derivatization and solid phase extraction (SPE) condition of SEM were screened by Plackett-Burman design and central composite design (CCD) experiment. The nitrogen isotope ratio analysis (NSIRA) of SEM in two types of crustaceans proved that its δ 15 N values significantly decreased from 7.0‰ to 2.0‰ once nitrofurazone being used. Analytical results found that the δ 15 N value of SEM ex in vivo was consistent its nitrofurazone precursor but the value of SEM end was dependent on N-containing components (e.g., tissue protein), ANOVA showed significant difference between two types of SEM (p < 0.05). Based on the δ 15 N variations between SEM itself and its nitrofurazone precursor, tissue protein of crustaceans, the percentages of SEM ex and SEM end can be calculated for its source apportionment in vivo. The limit of detection of SEM is down to 0.21 μg kg −1 and 0.54 μg kg −1 , and the identification lower limit of SEM ex are accurate at 6.27% and 0% for two types of crustaceans. The strategy first realized the independent determination of SEM ex and SEM end in crustacea aquatic products, which explained that high-level SEM in crustaceans can’t as the legal verdict of nitrofurazone abuse in aquaculture.
研究领域:
食品安全
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分析化学
·
生物学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Feng Dou,Jian Han,Jihui Li,Huixin Zhang,Kang Qiao,Jiahui Kan,Jianxin Chen
The addition of corrosion inhibitors can effectively improve the hazards posed by the corrosion of carbon steel in circulating cooling water. From the economic and environmental perspective, it makes sense to develop eco-friendly corrosion inhibitors that can be monitored online. In the present work, three polyaspartic acid (PASP) derivatives modified with benzothiazole compounds (R-ABT: R=H, Me and OMe) were synthesized as fluorescent green corrosion inhibitors for the first time, which have good thermostability and allow online detection by fluorescence spectroscopy . The corrosion performance of three inhibitors on carbon steel in cooling water was investigated using the electrochemical test, weight loss measurement, scanning electron microscopy, atomic force microscopy , contact angle test, X-ray photoelectron spectroscopy, density functional theory (DFT) and molecular dynamic (MD) simulation. The electrochemical tests indicate that all three derivatives are mixed-type inhibitors and their corrosion inhibition capacity is ranked as follows: PASP-OMe-ABT (96.45%) > PASP-Me-ABT (91.38%) > PASP-H-ABT (89.38%). The three inhibitor molecules improve the carbon steel surface by physisorption and chemisorption as shown by weight loss tests and surface analysis . XPS analysis further confirms the presence of a compound film on the metal surface . Meanwhile, the difference in the radial distribution function and diffusion coefficient of the three derivatives on the Fe (110) surface was also in-depth revealed by quantum chemical calculation based on DFT and MD simulation. The theoretical data obtained strongly support the experimental results and confirm that the introduction of methoxy enhances the corrosion inhibition performance.
研究领域:
腐蚀科学
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材料科学
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环境化学
·
表面科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Zhanglei Zhu,Wanzhong Yin,Bin Yang,Yafeng Fu,Jiwei Xue
Slime contamination is an urgent problem that should be solved in coal flotation. The adverse effects of slime contamination, by which low-ash clean coal is covered by high-ash fine slime and hence cannot be separated through the direct flotation process, have been recognized for the past decades. In this investigation, to reduce slime contamination, the reverse-and-direct flotation process was proposed. Flotation results indicated that, based on the similar ash content, the concentrate yield increased by 7.36% using the reserve-and-direct flotation process compared with the two-steps direct flotation process. XPS (X-ray Photoelectron Spectroscopy) and SEM (Scanning Electron Microscopy) results verified that the reduction of fine clay minerals coating on the surface of clean coal was achieved and hence the flotation performance was improved with the reverse-and direct flotation process. Therefore, it can be arrived that the reverse-and-direct flotation process is a potential and effective separation method to upgrade the flotation performance of fine coking coal.
研究领域:
矿物加工工程
·
煤炭浮选技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.799
Qingxia Ye,Zhen Li,Jin Liu,Di Wang,Ping Wang,Xianbiao Wang,Xianhai Hu
In this paper, the application of zone smelting to remove the trace heavy metal lead from waste acrylonitrile-butadiene-styrene (wABS) plastics was investigated. ABS standard samples with uniform and stable lead content were prepared by the method of lead stearate coupling agent. The structure, thermal stability, morphology and lead content of the standard ABS samples before and after zone smelting were characterized by FTIR, DSC, SEM and ICP-AES. The results showed that the lead content in the front and middle sections of the ABS sample decreased obviously after zone smelting, while the lead content in the tail increased significantly, and the structure, thermal stability and morphology remained basically unchanged.
研究领域:
材料科学
·
环境工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123624
·
IF 7.5
Zhixia Wang,Chang Dong,Junqiang Dong,Yang Cheng,Yuan Hu,Dan Liu,Yan Zhang,Zhen Qiu,Yanjiang Cai,Yongfu Li,Cheng Fu,Bing Yu
Saline-alkali soil degradation severely hinders sustainable rice production, with conventional NPK fertilizers suffering from low nutrient use efficiency and aggravated soil secondary salinization in such fragile agroecosystems. This study integrated field agronomic trials and behavioral empirical analysis to explore starch-encapsulated zeolite-biochar-based compound fertilizer (SC-ZEO/BCF) for coastal saline-alkali rice systems in southeastern China, via an extended Motivation-Opportunity-Ability framework incorporating trust as a core mediating construct. Agronomic results showed SC-ZEO/BCF at 0.8 × (20% NPK reduction) notably boosted rice yield and elevated NUE by 82.79%, while enhancing soil desalination and alkalinity amelioration, and achieving the highest net profit with markedly estimated reductions in nitrogen‑related environmental costs from leaching and gas emissions. Structural equation modeling of 230 valid farmer surveys revealed motivation, ability and opportunity positively affected adoption willingness directly and/or indirectly via trust, with trust exerting the strongest direct effect ( β =0.433); the indirect effect of opportunity on adoption willingness via trust was positive and significant, representing the sole positive pathway. Ability emerged as the top predictor of trust ( β =0.492) among all the driving factors. This study suggests potential agronomic, economic and environmental advantages of SC‑ZEO/BCF under the tested conditions, and highlights trust as a pivotal driver for technology adoption, providing evidence-based insights for policymakers and extension services to promote green fertilization technologies in saline-alkali agricultural systems.
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DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 2
·326
·
IF 3.426
Qiwen Yong,Jinming Chang,Qi Liu,Feng Jiang,Daidong Wei,Haijun Li
Matt polyurethane coating was successfully prepared through the synergistic effect of castor oil and phenolic epoxy resin into polyurethane backbone. The formation mechanism may be ascribed to the modulus mismatch between the partially modified epoxy polyurethane and partially unmodified polyurethane. Scanning electron microscopy (SEM) was used to observe the micro-rough surface morphologies. Atomic force microscopy (AFM) and three-dimensional (3D) surface profilometer were applied to calculate a series of surface roughness parameters in different dimensions, such asSa,Sq,Sp,Sv,Sz,Sku,Ssk, etc. The exciting results of this paper—the correlation of surface roughness on measurement length and gloss—are explored in detail. It reveals the extrinsic property of measured roughness with measurement length and provides guidance for what kind of incident angle gloss meters (20°, 60°, and 85°) best describe the gloss of matt polyurethane coating.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）