Journal of Materials Chemistry C最新文献_第6页

Experimental design of (Cs,Rb)2Sn(Bi)Cl6 blue phosphors by cation-substitution-induced lattice strain†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC03749A

Oleksandr Stroyuk, Oleksandra Raievska, Manuel Daum, Christian Kupfer, Andres Osvet, Jens Hauch and Christoph J. Brabec

{"title":"Experimental design of (Cs,Rb)2Sn(Bi)Cl6 blue phosphors by cation-substitution-induced lattice strain†","authors":"Oleksandr Stroyuk, Oleksandra Raievska, Manuel Daum, Christian Kupfer, Andres Osvet, Jens Hauch and Christoph J. Brabec","doi":"10.1039/D4TC03749A","DOIUrl":"https://doi.org/10.1039/D4TC03749A","url":null,"abstract":"A mild high-throughput synthesis of doubly substituted (CsxRb1−x)2SnyBi1−yCl6 perovskites yields single-phase solid-solution compounds in the compositional domain of x = 0–1 and y ≥ 0.75. Bi-substituted compounds emit relatively intense and broadband blue photoluminescence (PL) peaked at 455 nm, originating from the self-trapped excitonic states. Both Sn/Bi and Cs/Rb substitutions were found to exert a lattice strain with the maximal strain magnitudes observed close to x = 0.5 and y = 0.90. The PL parameters of the single-phase (CsxRb1−x)2SnyBi1−yCl6 samples, in particular, the PL intensity and lifetime, as well as the rate constants of radiative and non-radiative recombination, correlate with the strain magnitude.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 5","pages":" 2303-2311"},"PeriodicalIF":5.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural engineering of glass for regulating chemical surroundings of dopants 用于调节掺杂剂化学环境的玻璃结构工程

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC03864A

Yuan Gao, Yikang Jiang, Xiaosong Lu and Zhiyong Yang

引用次数: 0

Synthesis of a novel DOPO-based ionic liquid flame retardant and its application in epoxy resin†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC03681F

Jinzhuo Zhang, Jiaming Liang, Jiapeng Long and Bing Liang

{"title":"Synthesis of a novel DOPO-based ionic liquid flame retardant and its application in epoxy resin†","authors":"Jinzhuo Zhang, Jiaming Liang, Jiapeng Long and Bing Liang","doi":"10.1039/D4TC03681F","DOIUrl":"https://doi.org/10.1039/D4TC03681F","url":null,"abstract":"The low mechanical properties of flame-retardant epoxy resins restrict their applicability; therefore, the development of flame retardants designed to enhance the mechanical properties while maintaining the flame retardancy of epoxy resins presents significant potential for various applications. The present study introduces a novel fused-type ionic-liquid flame retardant, [DAmim]Ps, which is developed and applied to enhance the flame retardancy of EP. Unlike conventional additive flame retardants, [DAmim]Ps exhibits unique characteristics such as a melting point at 101 °C and active participation in the curing reaction of EP, thereby significantly facilitating the improvement of flame retardancy. Upon the incorporation of [DAmim]Ps, the EP composite system exhibited a [DAmim]Ps content of 6.8%, demonstrating exceptional performance with a remarkable limiting oxygen index (LOI) value of 32.9% and achieving a V-0 rating in a UL-94 vertical combustion test; meanwhile, the combustions of THR and HRR in EP-5 are 39.3% and 36.3% lower than those in EP-0, respectively, reflecting the excellent flame-retardant performance. Furthermore, the addition of [DAmim]Ps ionic liquid also promotes the mechanical properties of the EP system. The tensile strength, bending modulus, and impact strength increase by 51.14%, 57.7%, and 146.0%, respectively.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 4","pages":" 1844-1856"},"PeriodicalIF":5.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-assisted screening of intrinsic rattling compounds with large atomic displacement†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC03756A

Kunpeng Yuan, Zhaoxuan Feng, Xiaoliang Zhang and Dawei Tang

{"title":"Machine learning-assisted screening of intrinsic rattling compounds with large atomic displacement†","authors":"Kunpeng Yuan, Zhaoxuan Feng, Xiaoliang Zhang and Dawei Tang","doi":"10.1039/D4TC03756A","DOIUrl":"https://doi.org/10.1039/D4TC03756A","url":null,"abstract":"Thermal conductivity is a key thermophysical property governing the heat transport in materials. Specifically, some applications such as thermoelectrics and thermal coatings need ultralow thermal conductivity. In this work, we established a correlation between machine learning models and the mean square displacement with high efficiency and accuracy considering that large atomic displacements can be regarded as reasonable criteria for ultralow thermal conductivity. The results show that the prediction performance of traditional machine learning models, such as random forest, which are based solely on composition-weighted elemental properties, is comparable to that of advanced graph neural network models. Deep insight into the underlying physical and chemical properties reveals that atomic features related to the volume and bonding strength demonstrate a close correlation with the mean square displacement. By projecting onto the space of significant atomic features, the constituent elements and structure prototypes that have the potential for substantial atomic displacement are identified. In particular, halide double perovskites are reported to be promising structures exhibiting large atomic displacement. To verify the prediction results, the mean square displacements of 20 halide double perovskites are further validated by first-principles calculations, and intrinsic rattling vibrations are also recognized in this structure prototype. This work proposes a viable method for the rapid screening of materials with considerable atomic displacement based on simple elemental and structural properties, thereby facilitating the discovery of potential candidates for ultralow thermal conductivity.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 5","pages":" 2414-2426"},"PeriodicalIF":5.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A quantum anomalous Hall effect in novel two-dimensional structure Ta2Se3†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC04243C

Yanghao Tang, Ao Du, Long Kuang, Ting Yang, Shi Qiu, Jinming Cai and Cuixia Yan

引用次数: 0

Nanoscale scintillating materials for X-ray imaging: fundamentals and applications 用于x射线成像的纳米级闪烁材料：基础和应用

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-12-02 DOI: 10.1039/D4TC04382K

Yuan Zhong, Xujiang Yu and Wanwan Li

{"title":"Nanoscale scintillating materials for X-ray imaging: fundamentals and applications","authors":"Yuan Zhong, Xujiang Yu and Wanwan Li","doi":"10.1039/D4TC04382K","DOIUrl":"https://doi.org/10.1039/D4TC04382K","url":null,"abstract":"X-ray imaging based on scintillators holds significant importance in medical diagnosis, security inspection, and industrial production. Nanoscale scintillators (NSs) with lower processing costs and synthesis temperatures possess the advantages of easy shape customization and flexibility in imaging, thus making them a viable solution to address the various limitations of traditional single-crystal scintillators. Here, this review summarizes the research progress of NSs in the field of X-ray indirect imaging from the perspectives of fundamentals, materials, structure engineering and applications. Initially, the scintillation mechanism and performance requirements of NSs are outlined with a detailed classification of emission modes for each type of NS. Subsequently, nanoscale scintillating materials, including II–VI quantum dots, metal halides, rare earth ion-doped compounds, metal clusters and metal–organic frameworks, are discussed with emphasis on enriching the material inventories and modulating the scintillation properties. Furthermore, the structural forms of NSs in scintillation screens and their research progress in multi-mode X-ray imaging applications are presented. Finally, the main challenges for practical applications and future research directions are discussed. This review suggests that the exploration of NSs could facilitate significant breakthroughs in X-ray imaging in terms of imaging performance and application scenarios in the future.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 3","pages":" 1036-1062"},"PeriodicalIF":5.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-healing, adhesive liquid metal hydrogels based on PNIPAM microgels for high-performance temperature and strain sensors†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-11-30 DOI: 10.1039/D4TC03905J

Xiaoyan He, Penggai Ma, Shuo Ma, Runze Cao, Xin Tian, Yanling Liang, Jing Li, Yuanyuan Lu, Zhiqiang Wang and Xiaoquan Lu

{"title":"Self-healing, adhesive liquid metal hydrogels based on PNIPAM microgels for high-performance temperature and strain sensors†","authors":"Xiaoyan He, Penggai Ma, Shuo Ma, Runze Cao, Xin Tian, Yanling Liang, Jing Li, Yuanyuan Lu, Zhiqiang Wang and Xiaoquan Lu","doi":"10.1039/D4TC03905J","DOIUrl":"https://doi.org/10.1039/D4TC03905J","url":null,"abstract":"Conductive hydrogels have attracted much attention as candidates for flexible strain sensors. However, the preparation of multifunctional hydrogel sensors with excellent comprehensive performance is still a great challenge. In this study, a facile preparation method was used to prepare the conductive hydrogel MR/LM-PAAm-PEI (ML) by mixing PNIPAM microgels and gallium-based liquid metals. The hydrogel not only has excellent mechanical properties but also exhibits good temperature responsiveness and electrical properties, as well as efficient adhesion and excellent self-healing ability. The sensors of the ML hydrogel are capable of accurately and reproducibly recognizing handwriting and encrypted information and have excellent sensing ability as strain sensors (sensitivity GF value up to 5.45, ultra-fast response and recovery times of 160 ms and 170 ms, respectively, and a wide range of strain sensing up to 10–400%). The sensing mechanism of the hydrogel relies on changes in its internal structure when it is deformed or exposed to temperature variations. These structural changes lead to alterations in the conduction pathways within the hydrogel, which in turn triggers significant changes in the electrical signal. In particular, the sensors of the ML hydrogel have excellent thermal sensitivity and were used as temperature sensors over a wide range of 20–70 °C. The use of the sensor for finger movements to transmit Morse code messages has also been successful. This work offers prospects for the development of multifunctional strain sensors.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 5","pages":" 2427-2439"},"PeriodicalIF":5.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the Fe/Ni ratio in double half-Heusler composition HfFe1−xNixSb†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-11-29 DOI: 10.1039/D4TC03206C

Kazuki Imasato, Philipp Sauerschnig, Masanobu Miyata, Takao Ishida, Atsushi Yamamoto and Michihiro Ohta

引用次数: 0

Thickness-dependent quasi-two-dimensional β-Ga2O3 solar-blind photodetectors prepared via GaSe oxidation†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-11-29 DOI: 10.1039/D4TC04826A

Jianwen Hu, Kexin He, Haoran Long, Yin Hu, Penghong Ci, Yueyang Liu, Jing Zhang, Liyuan Liu, Juehan Yang and Zhongming Wei

{"title":"Thickness-dependent quasi-two-dimensional β-Ga2O3 solar-blind photodetectors prepared via GaSe oxidation†","authors":"Jianwen Hu, Kexin He, Haoran Long, Yin Hu, Penghong Ci, Yueyang Liu, Jing Zhang, Liyuan Liu, Juehan Yang and Zhongming Wei","doi":"10.1039/D4TC04826A","DOIUrl":"https://doi.org/10.1039/D4TC04826A","url":null,"abstract":"Thermal management, in both electronic power devices and opto-electronic ultraviolet (UV) photodetectors based on gallium oxide (Ga2O3) materials, has been regarded as an important technical approach to enable systems to operate stably for long periods of time. Specifically, in Ga2O3-based solar-blind UV photodetectors, the low thermal conductivity of the material would result in severe heat accumulation in the device, leading to a slow photoresponse speed which in turn causes significant problems such as signal distortion, data loss, and system delay. Therefore, it is crucial to minimize heat accumulation and improve heat dissipation efficiency from the perspective of materials. Low-dimensional materials, with large specific surface areas, would exhibit faster heat dissipation rates than bulk counterparts in heat conduction, heat convection, and heat radiation mechanisms. In this work, quasi-two-dimensional β-Ga2O3 with different thicknesses were synthesized by thermal oxidation of two-dimensional (2D) GaSe nanoflakes with a van der Waals (vdW) layered structure. It was suggested that the thinness of GaSe limits the thickness of β-Ga2O3 after oxidation, improves the specific surface area of the device, and effectively suppresses the accumulation of hot carriers in the system, thus providing a feasible solution for solving the thermal problem of wide-bandgap optoelectronic devices.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 5","pages":" 2406-2413"},"PeriodicalIF":5.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrating unwonted photoluminescence and anti-thermal quenching in Ba2MgTeO6 double perovskites for high-performance optical thermometers†

IF 5.7 2区材料科学

Journal of Materials Chemistry C Pub Date : 2024-11-29 DOI: 10.1039/D4TC03009E

Nithin Jayan Suraja, Amrithakrishnan Bindhu, Sibi Kaithakkal Solaman and Subodh Ganesanpotti

{"title":"Integrating unwonted photoluminescence and anti-thermal quenching in Ba2MgTeO6 double perovskites for high-performance optical thermometers†","authors":"Nithin Jayan Suraja, Amrithakrishnan Bindhu, Sibi Kaithakkal Solaman and Subodh Ganesanpotti","doi":"10.1039/D4TC03009E","DOIUrl":"https://doi.org/10.1039/D4TC03009E","url":null,"abstract":"An unwonted photoluminescence dominating in the cyan region is discovered in Ba2MgTeO6 double perovskite. It originates from the 3T2u, 3T1u – 1A1g electronic transitions of Te4+ ions within Ba2MgTeO6 and possesses tunability from the cyan to NIR region. The cyan emission shows an anti-thermal quenching behaviour at low temperatures while a faster thermal quenching is observed above 300 K. Considering the extraordinary temperature dependence of inherent emission of Ba2MgTeO6, a novel Eu3+-activated Ba2MgTeO6 phosphor was developed for ratiometric temperature sensing. An unusual excitation-driven switching of maximum intensity from magnetic dipole transition to electric dipole transition due to the partial release of parity inhibition is also observed in Eu3+-activated Ba2MgTeO6. The temperature-dependent Raman and PL excitation studies reveal that the increased thermal population of vibrational levels causes a rapid thermal quenching of Te4+ luminescence via the cross-over point. Furthermore, a higher relative sensitivity of 3.16 and 4.86% K−1 was obtained for the Ba2MgTeO6:0.02Eu3+ phosphor based on the FIR and EIR modes, respectively. This study will definitely provide new directions in the areas of solid-state lighting and optical thermometry.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 5","pages":" 2470-2484"},"PeriodicalIF":5.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0