Journal of Materials Chemistry C最新文献

{"title":"Ion migration suppression in quasi-2D CdTeMoO6 crystals for high-performance X-ray detection","authors":"Fuai Hu, Conggang Li, Lijuan Chen, Yang Li, Yanru Yin, Feifei Guo and Zeliang Gao","doi":"10.1039/D5TC02462E","DOIUrl":"https://doi.org/10.1039/D5TC02462E","url":null,"abstract":"<p >Low and stable dark currents are critical in detection applications to improve detector sensitivity and signal-to-noise ratio. In this paper, the oxide crystal CdTeMoO<small>₆</small> (CdTM) with a van der Waals layered structure shows potential as an X-ray detection material. The resistivity of the CdTM single crystal (SC) along the layer direction is determined to be 3.21 × 10<small>¹⁴</small> Ω cm, resulting in a low dark current of 0.6 pA at 333 V mm<small>⁻¹</small>. The carrier mobility lifetime product (<em>μτ</em>) is 4.79 × 10<small>⁻⁴</small> cm<small>²</small> V<small>⁻¹</small>, the recorded value of oxide SCs, and comparable to many perovskite SCs. The detection limit is 22 nGy<small>_air</small> s<small>⁻¹</small>, and the sensitivity reaches 455 μC Gy<small>_air</small><small>⁻¹</small> cm<small>⁻²</small> under 40 keV X-rays. By blocking the ion migration path through the unique quasi-two-dimensional (quasi-2D) layered structure, the ion migration can be effectively inhibited even at 333 V mm<small>⁻¹</small>. In addition, the unique lamellar growth habit of van der Waals layered CdTM crystals shows excellent prospects for large-area CdTM SCs for X-ray imaging. This work demonstrates that quasi-2D oxide SCs are poised to be utilized in X-ray detection, paving the way for X-ray imaging and expanding the X-ray material system.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 39","pages":" 20251-20258"},"PeriodicalIF":5.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248127","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}

{"title":"Flexible patterned mirrors prepared by stacking patterned cholesteric liquid crystal polymer network films","authors":"Qingqing Huang, Xiaofang Chen, Limin Wu, Wei Liu, Yi Li and Yonggang Yang","doi":"10.1039/D5TC02321A","DOIUrl":"https://doi.org/10.1039/D5TC02321A","url":null,"abstract":"<p >Cholesteric liquid crystal polymer network (CLCN) mirrors have attracted much attention for their potential applications as optical filters and for decoration. For the preparation of CLCN films, chiral additives with a high helical twisting power value are essential. Herein, a series of chiral additives were synthesized using isosorbide and 4-(<em>trans</em>-4-<em>n</em>-alkylcyclohexyl)benzoic acids. With increasing alkyl chain length, the solubility of the chiral dopant decreased in the CLC mixtures. Since the solubility of the chiral additive with two <em>n</em>-pentyl chains is sensitive to temperature, the CLC mixture containing this additive exhibits thermochromic properties. Several CLCN films were prepared using the chiral dopant with two ethyl chains or <em>S</em>5011. Then, the CLCN mirrors were prepared by stacking these CLCN films using an optically clear adhesive. For the patterned CLCN mirror prepared using the CLCN films with opposite handedness, colourful images are observed through circular polarizers, which can be applied for encryption.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 39","pages":" 20206-20211"},"PeriodicalIF":5.1,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248122","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}

{"title":"Advances in hyperbolic metamaterial sensors: a comprehensive review","authors":"Dip Sarker and Ahmed Zubair","doi":"10.1039/D5TC01582K","DOIUrl":"https://doi.org/10.1039/D5TC01582K","url":null,"abstract":"<p >Low-molecular-small-weight organisms, such as viruses and bacteria, create new challenges to existing sensors’ technological advancement. Besides detecting these organisms, several applications, such as the detection of proteins, gases, refractive index, and temperature, require radical innovation to deliver high sensitivity, specificity, diffusion-limited transport, and accuracy. Plasmonic hyperbolic metamaterial (HMM)-based sensors might pave the way for low-cost and rapid detection with high accuracy by harnessing the highly sensitive anisotropic properties. Therefore, this review discusses in detail the latest developments in HMM-based sensors for different applications.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 37","pages":" 19106-19124"},"PeriodicalIF":5.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134950","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}

{"title":"Origins of electrical conductivity in 3D iron-tetrazole-based metal–organic frameworks","authors":"María Esteve-Rochina, Jennifer Faro-Guara, Enrique Ortí, Aron Walsh and Joaquín Calbo","doi":"10.1039/D5TC02135A","DOIUrl":"https://doi.org/10.1039/D5TC02135A","url":null,"abstract":"<p >Electrically conductive metal–organic frameworks (MOFs) have emerged as materials for energy conversion and storage, with the advantages of intrinsic porosity and high tunability. One promising strategy to design conducting MOFs is the use of electroactive ligands, combined with mixed-valence phenomena promoted by redox-accessible inorganic pairs. In this regard, a porous material based on a nitrogenated ligand (benzeneditetrazole, BDT) and the transition metal cation Fe(<small>II</small>), Fe<small>₂</small>(BDT)<small>₃</small>, holds a record conductivity among 3D MOFs. Its efficient charge transport was ascribed to the –(Fe–N–N–)<small>_∞</small> network, opening the door to the design of novel conducting materials based on that scaffold. We present a theoretical investigation of the charge-transport properties for the record Fe<small>₂</small>(BDT)<small>₃</small> polymorph, and extend the study to two analogous polymorphs with the same chemical composition but different crystal symmetry. Density functional theory calculations of the electronic band structure reveal the presence of alternative transport channels with high electronic delocalization along the π-conjugated ditetrazole ligand in combination to the iron–nitrogen chain. Our results demonstrate that ligand protonation distribution mandates charge-transport efficiency, and defines a different hole/electron conduction pathway for each polymorph. We thus propose a new strategy to enhance conductivity in porous materials based on protic ligands through engineering of protonic ordering. A detailed analysis of the partial Fe(<small>II</small>) oxidation to Fe(<small>III</small>) confirms insertion of empty Fe(<small>III</small>)-d energy levels within the bandgap with a small energy penalty, thus allowing enhancement of the electronic properties of the material through mixed-valence phenomena. This work provides insights into the factors influencing charge transport in MOFs, guiding the design and discovery of advanced porous conductors for next-generation applications.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 36","pages":" 19026-19036"},"PeriodicalIF":5.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d5tc02135a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel 2D-ferroic nanocomposite anti-reflection screen-printed films for EMI shielding: an experimental and theoretical study","authors":"Vaishnavi Khade, Avanish Babu Thirumalasetty, C. Krishnamoorthi, Maria Teresa Cuberes Montserrat and Madhuri Wuppulluri","doi":"10.1039/D5TC00775E","DOIUrl":"https://doi.org/10.1039/D5TC00775E","url":null,"abstract":"<p >A high-performance electromagnetic interference (EMI) shielding material, based on mulberry paper and fabricated using a screen-printing technique, has been developed to achieve excellent shielding effectiveness. The study systematically investigates the EMI shielding ability of a material by varying the concentration of MoS<small>₂</small>/Co<small>_0.9</small>Ni<small>_0.1</small>Fe<small>₂</small>O<small>₃</small> nanoparticles in a PVDF polymer matrix. Three different concentrations, namely 10 wt%, 20 wt%, and 30 wt%, are used. The CST simulation tool is used to forecast the electromagnetic compatibility and mode of electromagnetic wave propagation. Experimentally, the shielding effect of the screen-printed film with 30 wt% of MoS<small>₂</small>/Co<small>_0.9</small>Ni<small>_0.1</small>Fe<small>₂</small>O<small>₃</small> in PVDF revealed over 74.2 dB, which is the highest value of shielding efficiency in the X-band when compared to other fabricated films with 10 and 20 wt% of MoS<small>₂</small>/Co<small>_0.9</small>Ni<small>_0.1</small>Fe<small>₂</small>O<small>₃</small>. Moreover, a durability test is conducted to check the dependence of the shielding efficiency of PMC films on mechanical bending for 10 000 cycles. This report presents electromagnetic interference shielding materials by screen printing a PVDF/MoS<small>₂</small>/Co<small>_0.9</small>Ni<small>_0.1</small>Fe<small>₂</small>O<small>₃</small> composite on mulberry paper with a high shielding effect. A remarkable degree of concordance exists between the simulation and experimental measurements. In addition, the produced flexible composite film successfully showed good impedance matching and higher attenuation constants of 103.11 and 123.64 for 30 wt% films, respectively.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 36","pages":" 18991-19004"},"PeriodicalIF":5.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078731","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}

{"title":"Recent advances in stimuli-responsive covalent organic frameworks: from mechanisms to applications","authors":"Shen Xu, Shengqiang Xue, Le Yu and Qichun Zhang","doi":"10.1039/D5TC02640G","DOIUrl":"https://doi.org/10.1039/D5TC02640G","url":null,"abstract":"<p >Stimuli-responsive covalent organic frameworks (COFs) represent an emerging class of adaptive materials that synergize dynamic behavior with inherent porosity. This integration facilitates multi-stimuli responsiveness and confers substantial application potential across diverse domains. Herein, we systematically review stimuli-responsive behaviors and related mechanisms of smart COFs under physical, chemical, and combinatorial stimuli. Contemporary advances in material design are critically evaluated to correlate structural motifs with application performance in next-generation devices. Current research challenges and future development perspectives are analyzed to advance molecular engineering strategies. This work aims to establish foundational design principles for extending stimuli-responsive COF functionality to unexplored application scenarios.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 39","pages":" 19949-19982"},"PeriodicalIF":5.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248104","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}

{"title":"Asymmetric charge injection barrier yields high rectification in a rhenium(i)–organometallic compound","authors":"Subas Rajbangshi, Nila Pal, Ritu Gupta, Robinur Rahman, Pradeep Sachan, Vladimir N. Nesterov, Lisa Roy, Shishir Ghosh, Michael Zharnikov and Prakash Chandra Mondal","doi":"10.1039/D5TC01614B","DOIUrl":"https://doi.org/10.1039/D5TC01614B","url":null,"abstract":"<p >Electrical rectification is an important electronic function in molecular electronics. Many organic molecules and metal complexes have been studied in this context, assisted by analysis of the related charge transport mechanisms. However, Re(<small>I</small>)–organometallic compounds, which hold many opportunities in electronic functions, have not been explored in electronic circuitry so far. To this end, the present study focuses on emulating electrical current rectification by π-stacked Re(<small>I</small>) organometallic compounds embedded between p-doped Si and indium tin oxide electrodes in a two-terminal junction configuration. Among the tested compounds, <em>viz.</em> [Re(CO)<small>₄</small>(PPh<small>₃</small>){κ<small>¹</small>-(N)-saccharinate}] (<strong>1</strong>) and [Re(CO)<small>₃</small>(κ<small>²</small>-phen){κ<small>¹</small>-(N)-saccharinate}] (<strong>2</strong>), the latter demonstrates a remarkable electrical current rectification ratio of ≈4 × 10<small>³</small> at ±2.0 V at room temperature. The model device, composed of <strong>2</strong>, demonstrates proficient alternating current (AC) to direct current (DC) conversion at a frequency of up to 1 kHz, tested in a half-wave rectifier configuration. Temperature-dependent experimental current–voltage analysis implies the primary role of activated long-distance hopping for the charge transport and the asymmetric charge injection barrier heights at both electrode interfaces for current rectification. The above results lay the groundwork for using diverse organometallic compounds as circuit elements in nanoelectronic devices for specific electronic functions.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 39","pages":" 20074-20084"},"PeriodicalIF":5.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248112","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}

{"title":"Atomistic description of spin crossover under pressure and its giant barocaloric effect","authors":"Sergi Vela, Jordi Ribas-Arino, Steven P. Vallone, António M. dos Santos, Malcolm A. Halcrow and Karl G. Sandeman","doi":"10.1039/D5TC02560E","DOIUrl":"https://doi.org/10.1039/D5TC02560E","url":null,"abstract":"<p >The pressure-dependent evolution of the Spin Crossover (SCO) transition has garnered significant interest due to its connection to the giant barocaloric effect (BCE) near room temperature. Pressure alters both the molecular and solid-state structures of SCO materials, affecting the relative stability of low- and high-spin states and, consequently, the transition temperature (<em>T</em><small>_1/2</small>). Crucially, the shape of the <em>T</em><small>_1/2</small><em>vs.</em> pressure curve dictates the magnitude of the BCE, making its accurate characterization essential for identifying high-performance materials. In this work, we investigate the nonlinear <em>T</em><small>_1/2</small><em>vs.</em> pressure behavior of the prototypical SCO complex [FeL<small>₂</small>][BF<small>₄</small>]<small>₂</small> [L = 2,6-di(pyrazol-1-yl)pyridine] using solid-state PBE+<em>U</em> computations. Our results unveil the mechanisms by which pressure influences its SCO transition, including the onset of a phase transition, as well as the key role of low-frequency phonons in the BCE. Furthermore, we establish a computational protocol for accurately modeling the BCE in SCO crystals, providing a powerful tool for the rapid and efficient discovery of new materials with enhanced barocaloric performance.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 38","pages":" 19635-19641"},"PeriodicalIF":5.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d5tc02560e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Infrared imaging visualization: organic material-based up-conversion devices","authors":"Chun-Fang Zhang, Qi Feng, Rui Xue, Peng Zheng, Yi-Qi Zhou, YuLin Feng, XianTong Zheng and Yuan Liu","doi":"10.1039/D5TC02420J","DOIUrl":"https://doi.org/10.1039/D5TC02420J","url":null,"abstract":"<p >Up-conversion imaging, an emerging optoelectronic technology that integrates detection and display capabilities, provides an efficient approach for converting infrared signals into visible images. Unlike conventional infrared imaging systems, it operates without complex pixel arrays and readout circuits, making it especially attractive for biomedicine and wearable applications. Recently, the intrinsic advantages of organic semiconductors, such as material diversity and flexible structural design, have driven significant advancements in up-conversion devices. In this review, we provide a comprehensive overview of recent breakthroughs in organic material-based up-conversion devices, with emphasis on internal gain mechanisms such as phototransistors, photomultiplication, and multi-emissive-layer architectures. We examine the working principles, key performance metrics, rational material selection coupled with device architecture engineering of up-conversion devices, and the mechanisms that limit their performance. Key advances in biomedical imaging and wearable electronics are highlighted, and future opportunities are discussed from both technological and economic perspectives. Overall, this review provides a framework to guide the design of high-performance, application-ready up-conversion devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 37","pages":" 19149-19167"},"PeriodicalIF":5.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134952","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}

{"title":"A p-type doping strategy for a hole-transport polymer in blue perovskite light-emitting diodes","authors":"Jian Chen, Yifan Wang, Jiajia Gao, Jialiang Tian, Yuelong Ma, Wei Shen, Kun Cao, Yingying Fu, Lihui Liu and Shufen Chen","doi":"10.1039/D5TC02299A","DOIUrl":"https://doi.org/10.1039/D5TC02299A","url":null,"abstract":"<p >The inferior hole injection efficiency in blue perovskite light-emitting diodes (PeLEDs), caused by the large hole injection barrier and low hole mobility of conventional hole transport layers (HTLs), remains a critical limitation to achieving higher external quantum efficiency (EQE) and device stability. To address this challenge, we propose a rational interfacial engineering strategy employing p-type molecular doping to optimize device performance. By incorporating 2,3,5,6-tetrafluoro-7,7′,8,8′-tetracyanodimethyl-<em>p</em>-benzoquinone (F<small>₄</small>TCNQ) as a dopant in the poly(9,9-dioctylfluorene-<em>co-N</em>-(4-butylphenyl)diphenylamine) (TFB) HTL, we significantly enhance hole mobility from 3.96 × 10<small>⁻⁶</small> to 1.13 × 10<small>⁻⁴</small> cm<small>²</small> (V s)<small>⁻¹</small> and adjust the highest occupied molecular orbital energy level from −5.40 to −5.56 eV, facilitating efficient hole carrier injection and transport. Additionally, perovskite films deposited on the doped HTL exhibit enhanced crystallinity and a reduced defect density from 3.47 × 10<small>¹⁸</small> to 3.18 × 10<small>¹⁷</small> cm<small>⁻³</small>. Owing to these synergistic improvements, the optimized blue PeLEDs achieve a maximum EQE of 4.57% with an emission peak at 484 nm, representing a 4.02-fold enhancement over the pristine device. This work highlights the effectiveness of molecular doping in tailoring interfacial properties and balancing charge transport for high-performance blue PeLEDs.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 39","pages":" 20189-20197"},"PeriodicalIF":5.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145248120","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}