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  • 1
    Online Resource
    Online Resource
    Modulation on Electrostatic Potential of Passivator for Highly Efficient and Stable Perovskite Solar Cells
    Wiley ; 2023
    In:  Advanced Functional Materials Vol. 33, No. 34 ( 2023-08)
    Details
    In: Advanced Functional Materials, Wiley, Vol. 33, No. 34 ( 2023-08)
    Abstract: The perovskite layer contains a large number of charged defects that seriously impair the efficiency and stability of perovskite solar cells (PSCs), thus it is essential to develop an effective passivation strategy to heal them. Based on theoretical calculations, it is found that enhancing the electrostatic potential of passivators can improve passivation effect and adsorption energy between charged defects and passivators. Herein, an electrostatic potential modulation (EPM) strategy is developed to design passivators for highly efficient and stable PSCs. With the EPM strategy, 1‐phenylethylbiguanide (PEBG) and 1‐phenylbiguanide (PBG) are designed. It is found that the charge distribution and electrostatic potential of phenyl‐ and phenylethyl‐ substituent on the biguanide are significantly enhanced. The N atom directly bonding to the phenyl group shows larger positive charge than that bonding to the phenylethyl group. The modulated electrostatic potential makes PBG bind stronger with the defects on perovskite surface. Based on the effective passivation of EPM, a champion efficiency of 24.67% is realized and the device retain 91.5% of its initial PCE after ≈1300 h. The promising EPM strategy, which provides a principle of passivator design and allows passivation to be controllable, may advance further optimization and application of perovskite solar cells toward commercialization.
    Type of Medium: Online Resource
    ISSN: 1616-301X , 1616-3028
    URL: Issue
    URL: Article
    DOI: 10.1002/adfm.v33.34
    DOI: 10.1002/adfm.202213123
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2029061-5
    detail.hit.zdb_id: 2039420-2
    SSG: 11
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  • 2
    Online Resource
    Online Resource
    Air pollutant dispersion in street canyons based on an outdoor scale model and machine learning
    Elsevier BV ; 2023
    In:  Urban Climate Vol. 47 ( 2023-01), p. 101381-
    Details
    In: Urban Climate, Elsevier BV, Vol. 47 ( 2023-01), p. 101381-
    Type of Medium: Online Resource
    ISSN: 2212-0955
    URL: Article
    DOI: 10.1016/j.uclim.2022.101381
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 2683732-8
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  • 3
    Online Resource
    Online Resource
    In Operando Visualization of the Electrochemical Formation of Liquid Polybromide Microdroplets
    Wiley ; 2019
    In:  Angewandte Chemie Vol. 131, No. 43 ( 2019-10-21), p. 15372-15378
    Details
    In: Angewandte Chemie, Wiley, Vol. 131, No. 43 ( 2019-10-21), p. 15372-15378
    Abstract: Zinc–bromine flow batteries are promising for stationary energy storage, and bromine‐complexing agents have been used to form phase‐separated liquid polybromide products. However, an understanding of the dynamics of polybromide nucleation is limited due to the beam sensitivity and complexity of polybromides. Here we report an in operando platform composed of dark‐field light microscopy and a transparent electrochemical cell to reveal the dynamics of polybromide formation in their native environment. Using our platform, we confirm and reveal the liquid nature, chemical composition, pinning effect (strong interaction with Pt), residual effect (residual charge products on the surface), self‐discharging, and over‐oxidation of the polybromide products. The results provide insights into the role of complexing agents and guide the future design of zinc–bromine flow batteries. Furthermore, our in operando platform can potentially be used to study sensitive species and phases in other electrochemical reactions.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v131.43
    DOI: 10.1002/ange.201906980
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
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  • 4
    Online Resource
    Online Resource
    Effect of diffusion on interfacial properties of polyurethane-modified asphalt–aggregate using molecular dynamic simulation
    Walter de Gruyter GmbH ; 2022
    In:  REVIEWS ON ADVANCED MATERIALS SCIENCE Vol. 61, No. 1 ( 2022-10-28), p. 778-794
    Details
    In: REVIEWS ON ADVANCED MATERIALS SCIENCE, Walter de Gruyter GmbH, Vol. 61, No. 1 ( 2022-10-28), p. 778-794
    Abstract: In order to understand the diffusion behavior of polyurethane (PU) in asphalt and the adhesion between modified asphalt and aggregate, the diffusion system of PU-modified asphalt was studied by molecular dynamics simulation software. Asphalt molecular model, PU molecular model, and PU-modified asphalt molecular model were established, respectively, and were geometrically optimized. The interface model between original asphalt molecule and aggregate, modified asphalt molecule and aggregate, PU molecule and asphalt molecule are established. The diffusion coefficient is calculated from the mean square displacement curve of asphalt and PU, so as to characterize the diffusion ability of asphalt and PU. The adhesion between modified asphalt and aggregate is characterized the interface energy between modified asphalt and aggregate. The results show that the molecular movement of the two substances is relatively active, and the micro-holes in the system structure can be filled in a short time. The interface energy between PU-modified asphalt and aggregate is more significant than that between original asphalt and aggregate. PU-modified asphalt has good diffusion ability and better adhesion with aggregate.
    Type of Medium: Online Resource
    ISSN: 1605-8127
    URL: Article
    DOI: 10.1515/rams-2022-0265
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2022
    detail.hit.zdb_id: 2033066-2
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  • 5
    Online Resource
    Online Resource
    Air pollution and hospitalization of patients with idiopathic pulmonary fibrosis in Beijing: a time-series study
    Springer Science and Business Media LLC ; 2022
    In:  Respiratory Research Vol. 23, No. 1 ( 2022-12)
    Details
    In: Respiratory Research, Springer Science and Business Media LLC, Vol. 23, No. 1 ( 2022-12)
    Abstract: A small number of studies suggested that air pollution was associated with idiopathic pulmonary fibrosis (IPF) exacerbation, incidence and mortality. However, no studies to date were conducted in regions where air pollution is substantial. We aimed to investigate whether there are associations between acute increases in air pollution and hospitalization of patients with a confirmed primary diagnosis of IPF in Beijing. Methods Daily count of IPF hospitalizations (International Classification of Disease-10th Revision, J84.1) was obtained from an administrative database for 2013–2017 while daily city-wide average concentrations of PM 10 , PM 2.5 , NO 2 , Ozone, SO 2 were obtained from 35 municipal monitoring stations for the same period. The association between daily IPF hospitalization and average concentration of each pollutant was analyzed with a generalized additive model estimating Poisson distribution. Results Daily 24-h mean PM 2.5 concentration during 2013–2017 was 76.7 μg/m 3 . The relative risk (RR) of IPF hospitalization per interquartile range (IQR) higher (72 μg/m 3 ) in PM 2.5 was 1.049 (95% CI 1.024–1.074) and 1.031 (95% CI 1.007–1.056) for lag0 and moving averages 0–1 days respectively. No significant associations were observed for other lags. Statistically significant positive associations were also observed at lag0 with SO 2 , Ozone and NO 2 (in men only). Positive associations were seen at moving averages 0–30 days for PM 10 (RR per 86 μg/m 3 : 1.021, 95% CI 0.994–1.049), NO 2 (RR per 30 μg/m 3 : 1.029, 95% CI 0.999–1.060), and SO 2 (RR per 15 μg/m 3 : 1.060 (95% CI 1.025–1.097), but not with PM 2.5 or Ozone. Conclusions Despite improvement in air quality since the implementation of clean air policy in 2013, acute exposure to higher levels of air pollution is significantly associated with IPF hospitalization in Beijing. Air quality policy should be continuously enforced to protect vulnerable IPF populations as well as the general public.
    Type of Medium: Online Resource
    ISSN: 1465-993X
    URL: Article
    DOI: 10.1186/s12931-022-01998-8
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2041675-1
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  • 6
    Online Resource
    Online Resource
    Application and Development of Fiber Optic Gyroscope Inertial Navigation System in Underground Space
    MDPI AG ; 2023
    In:  Sensors Vol. 23, No. 12 ( 2023-06-15), p. 5627-
    Details
    In: Sensors, MDPI AG, Vol. 23, No. 12 ( 2023-06-15), p. 5627-
    Abstract: Fiber Optic Gyroscope Inertial Navigation System (FOG-INS) is a navigation system using fiber optic gyroscopes and accelerometers, which can offer high-precision position, velocity, and attitude information for carriers. FOG-INS is widely used in aerospace, marine ships, and vehicle navigation. In recent years, it has also played an important role in underground space. For example, in the deep earth, FOG-INS can be used in directional well drilling, which can enhance recovery in resource exploitation. While, in shallow earth, FOG-INS is a high-precision positioning technique that can guide construction in trenchless underground pipelaying. This article extensively reviews the application status and latest progress of FOG-INS in underground space from three aspects—FOG inclinometer, FOG drilling tool attitude measurement while drilling (MWD) unit, and FOG pipe-jacking guidance system. First, measurement principles and product technologies are introduced. Second, the research hot spots are summarized. Finally, the key technical issues and future trends for development are put forward. The findings of this work are useful for further research in the field of FOG-INS in underground space, which not only provides new ideas and directions for scientific research, but also offers guidance for subsequent engineering applications.
    Type of Medium: Online Resource
    ISSN: 1424-8220
    URL: Article
    DOI: 10.3390/s23125627
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2052857-7
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  • 7
    Online Resource
    Online Resource
    Immunomodulatory Mechanisms of Mesenchymal Stem Cells and Their Potential Clinical Applications
    MDPI AG ; 2022
    In:  International Journal of Molecular Sciences Vol. 23, No. 17 ( 2022-09-02), p. 10023-
    Details
    In: International Journal of Molecular Sciences, MDPI AG, Vol. 23, No. 17 ( 2022-09-02), p. 10023-
    Abstract: Mesenchymal stem cells (MSCs) are multipotent stem cells with the capacity of self-renewal, homing, and low immunogenicity. These distinct biological characteristics have already shown immense potential in regenerative medicine. MSCs also possess immunomodulatory properties that can maintain immune homeostasis when the immune response is over-activated or under-activated. The secretome of MSCs consists of cytokines, chemokines, signaling molecules, and growth factors, which effectively contribute to the regulation of immune and inflammatory responses. The immunomodulatory effects of MSCs can also be achieved through direct cell contact with microenvironmental factors and immune cells. Furthermore, preconditioned and engineered MSCs can specifically improve the immunomodulation effects in diverse clinical applications. These multifunctional properties of MSCs enable them to be used as a prospective therapeutic strategy to treat immune disorders, including autoimmune diseases and incurable inflammatory diseases. Here we review the recent exploration of immunomodulatory mechanisms of MSCs and briefly discuss the promotion of the genetically engineered MSCs. Additionally, we review the potential clinical applications of MSC-mediated immunomodulation in four types of immune diseases, including systemic lupus erythematosus, Crohn’s disease, graft-versus-host disease, and COVID-19.
    Type of Medium: Online Resource
    ISSN: 1422-0067
    URL: Article
    DOI: 10.3390/ijms231710023
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2019364-6
    SSG: 12
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  • 8
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    Online Resource
    Microstructure Characterization of High Explosives by Wavelet Transform
    Hindawi Limited ; 2022
    In:  Mathematical Problems in Engineering Vol. 2022 ( 2022-4-29), p. 1-16
    Details
    In: Mathematical Problems in Engineering, Hindawi Limited, Vol. 2022 ( 2022-4-29), p. 1-16
    Abstract: The key macro properties of high explosives including sensitivity to shock, the possibility of initiation, and the subsequent chemical reaction are known to be controlled by processes occurring at their microstructure level. However, there is a lack of an easy, effective, and accurate method to quantify the microstructure, termed as fabric, of high explosives despite an abundance of evidence regarding its importance. This study proposes a rotational Haar wavelet transform (RHWT) method to characterize the fabric of high explosives from two-dimensional images, yielding key fabric parameters including rose diagram, fabric direction, and degree of fabric anisotropy. The fabric tensor commonly used in numerical simulations and constitutive models can also be determined by RHWT. The RHWT was implemented on microscopic images of six high explosives captured by various imaging techniques including scanning electrical microscopy, polarized light microscopy, and micro X-ray computed tomography. Despite these variables, the proposed RHWT successfully identifies fabric in these images, demonstrating robustness and validity of RHWT.
    Type of Medium: Online Resource
    ISSN: 1563-5147 , 1024-123X
    URL: Article
    DOI: 10.1155/2022/3833205
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2022
    detail.hit.zdb_id: 2014442-8
    SSG: 11
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  • 9
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    Online Resource
    The Impact of Smart Glasses on a New Generation of Users
    IGI Global ; 2021
    In:  International Journal of Business Strategy and Automation Vol. 2, No. 4 ( 2021-8-26), p. 1-25
    Details
    In: International Journal of Business Strategy and Automation, IGI Global, Vol. 2, No. 4 ( 2021-8-26), p. 1-25
    Type of Medium: Online Resource
    ISSN: 2644-2094 , 2644-2108
    URL: Issue
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.4018/IJBSA.2021
    DOI: 10.4018/IJBSA.20211001
    DOI: 10.4018/IJBSA
    DOI: 10.4018/IJBSA.286776
    Language: Ndonga
    Publisher: IGI Global
    Publication Date: 2021
    detail.hit.zdb_id: 3005193-9
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  • 10
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    Direct Z-scheme Ba0.8Sr0.2TiO3/Ag/Ag2O heterostructural nanotube with pyroelectric and photocatalytic synergy for enhanced catalytic performance
    Elsevier BV ; 2022
    In:  Materials Science and Engineering: B Vol. 279 ( 2022-05), p. 115678-
    Details
    In: Materials Science and Engineering: B, Elsevier BV, Vol. 279 ( 2022-05), p. 115678-
    Type of Medium: Online Resource
    ISSN: 0921-5107
    URL: Article
    DOI: 10.1016/j.mseb.2022.115678
    RVK:
    VA 5950.2
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1492109-1
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