Journal of Materials Chemistry C最新文献

{"title":"Fluorescence modulation of pyridinium betaines: a mechanofluorochromic investigation†","authors":"Peter W. McDonald, Jingjing Xu, Dale R. Lonsdale, Isabelle Jones, Benjamin Poggi, Rosalind P. Cox, Stéphane Aloise, Andrew D. Scully, Clémence Allain, Laurence Bodelot, Stephen A. Moggach, Toby D. M. Bell, Rémi Métivier, Sebastian G. B. Furness, Lars Goerigk and Chris Ritchie","doi":"10.1039/D4TC04290E","DOIUrl":"https://doi.org/10.1039/D4TC04290E","url":null,"abstract":"<p >A reversible change in a material's fluorescence spectrum on the application of force is known as mechanofluorochromism (MFC) and is a well-established field of study. However, the mechanism(s) responsible for the chromism may be different for each new material and it is important to elucidate these for many reasons, including the rational design of new analogues with targeted properties. Herein, the photophysical properties and mechanistic understanding of two MFC pyridinium betaines are reported. The emission sensitivity is explained by the coexistence of crystalline and amorphous phases after the application of mechanical force, with increased conformational flexibility in the amorphous phase facilitating red-shifts in emission. This explanation is supported by evidence from a range of spectroscopic techniques, including electron diffraction (ED) and fluorescence lifetime imaging microscopy (FLIM) mapping, two techniques that have, to the best of our knowledge, not been applied in the field of MFC to mechanically ground particles. For one of the compounds, ED on ground microcrystallites shows unambiguously that the same crystalline phase is retained after grinding, along with an amorphous contribution, providing direct evidence for the crystalline-amorphous mechanism, and the presence of these two phases is further supported by FLIM mapping. We envision these techniques will be highly instructive for the analysis of similar materials.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 48","pages":" 19371-19385"},"PeriodicalIF":5.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810794","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":"Accessing mixed cluster rare-earth MOFs with reduced connectivity via linker expansion and desymmetrization: co-assembly of 6-c and 10-c hexanuclear clusters in RE-stc-MOF-1†","authors":"Edward Loukopoulos, Constantinos Tsangarakis, Konstantinos G. Froudas, Maria Vassaki, Giasemi K. Angeli and Pantelis N. Trikalitis","doi":"10.1039/D4TC03317E","DOIUrl":"https://doi.org/10.1039/D4TC03317E","url":null,"abstract":"<p >MOFs based on hexanuclear rare-earth (RE) clusters with reduced connectivity (&lt;12) are rare. The co-assembly of RE clusters with distinct reduced connectivity provides access to novel structures. We report a new family of MOFs denoted as RE-<strong>stc</strong>-MOF-1, displaying a unique (3,3,3,3,6,10)-connected network, based on 6-c and 10-c RE hexanuclear clusters.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 1","pages":" 31-36"},"PeriodicalIF":5.7,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d4tc03317e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859407","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":"Photoluminescence, persistent luminescence and thermoluminescence studies of Cr-doped zinc gallogermanate (ZGGO:Cr)†","authors":"Duarte M. Esteves, Maria S. Batista, Joana Rodrigues, Ana V. Girão, Luís C. Alves, Ana L. Rodrigues, M. Isabel Dias, Florinda M. Costa, Katharina Lorenz, Sónia O. Pereira, Teresa Monteiro and Marco Peres","doi":"10.1039/D4TC03924F","DOIUrl":"https://doi.org/10.1039/D4TC03924F","url":null,"abstract":"<p >This paper reports a comprehensive study of single-phase polycrystalline chromium-doped zinc gallogermanate (ZGGO:Cr) synthesised by a high-temperature solid-state reaction, employing photoluminescence (PL), persistent luminescence (PersL) and thermoluminescence (TL) measurements. A bandgap energy of ∼4.77 eV (260 nm) was estimated by optical reflectance. The ZGGO:Cr luminescence was dominated by a red/near-infrared emission due to Cr<small>³⁺</small> optical centres, which displayed well-resolved R1, R2, N1 and N2 lines, and a broad vibronic progression. PL excitation (PLE) data revealed that those centres were preferentially populated <em>via</em> intraionic absorption, being also excited <em>via</em> band-to-band absorption and by a defect excitation band at ∼0.9 eV below the conduction band, whose origin remains unknown. PersL of more than 10 h was identified and attributed to the N2 Cr<small>³⁺</small>-related defect. The TL results suggest a continuous distribution of electronic states with activation energies ranging from about 0.7 eV to 1.2 eV. An effective density of states was obtained for different delay times between irradiation and heating, revealing a rapid depopulation for activation energies below ∼1 eV. In short, this research contributes to a better understanding of traps in ZGGO:Cr and highlights the potential of the Cr<small>³⁺</small>-related emission in this material for dosimetric purposes, paving the way for developing novel ZGGO:Cr-based devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 48","pages":" 19359-19370"},"PeriodicalIF":5.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810793","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":"Exploring π-extended chiral ligands for the direct detection of circularly polarized light in 2D chiral perovskites†","authors":"Taesu Jeon, Doyeong Yeo, Wonbin Choi, Hongki Kim, In Hwan Jung and Joon Hak Oh","doi":"10.1039/D4TC04124K","DOIUrl":"https://doi.org/10.1039/D4TC04124K","url":null,"abstract":"<p >Perovskites incorporating chiral organic ligands are promising for circularly polarized light (CPL) photodetectors. This study introduces biphenyl-based chiral amines, (<em>R</em>/<em>S</em>)-BPEAs, which enabled the successful synthesis of chiral perovskites with larger-sized ligands. These new materials demonstrated improved circular dichroism and enhanced CPL detection, expanding the possibilities for CPL photodetectors.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 47","pages":" 19058-19062"},"PeriodicalIF":5.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777986","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":"Multilayer films for photon upconversion-driven photoswitching†","authors":"Zhihang Wang, Beatrice E. Jones, Larissa G. Franca, Takashi Lawson, Martyn Jevric, Kasper Moth-Poulsen and Rachel C. Evans","doi":"10.1039/D4TC03513E","DOIUrl":"10.1039/D4TC03513E","url":null,"abstract":"<p >Photoswitchable materials are of significant interest for diverse applications from energy and data storage to additive manufacturing and soft robotics. However, the absorption profile is often a limiting factor for practical applications. This can be overcome using indirect excitation <em>via</em> complementary photophysical pathways, such as triplet sensitisation or photon upconversion. Here, we demonstrate the use of triplet–triplet annihilation upconversion (TTA-UC) to drive photoswitching of the energy storing photoswitch norbornadiene–quadricyclane (NBD–QC) in the solid-state. A photoswitchable bilayer polymer film, incorporating the TTA-UC sensitiser–emitter pair of platinum octaethylporphyrin (PtOEP) and 9,10-diphenylanthracene (DPA), was used to trigger the photoinduced [2+2] cycloaddition of NBD to form QC using visible instead of UV light. The isolated TTA-UC film showed green-to-blue upconversion, with a competitive upconversion efficiency of (1.9 ± 0.1%) for the solid-state in air. Direct photoswitching of the isolated NBD film was demonstrated with a narrow UV light source (340 nm). However, in the bilayer film, spectral overlap between the upconverted blue emission in the TTA-UC film and the absorbance band of the NBD film resulted in indirect photoswitching using visible green light (532 nm, 1 W cm<small>⁻²</small>), thus extending the spectral operational window of the photoswitching film. The results demonstrate proof-of-feasibility of TTA-UC-promoted photoswitching in the solid-state, paving the way for potential applications in light-harvesting devices and smart coatings, using a wider selection of irradiation wavelengths.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 47","pages":" 19030-19034"},"PeriodicalIF":5.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11589804/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142749426","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":"Stretchable electronics based on inorganic semiconducting materials","authors":"Seung-Han Kang, Jeong-Wan Jo, Jaehyun Kim and Sung Kyu Park","doi":"10.1039/D4TC03745F","DOIUrl":"https://doi.org/10.1039/D4TC03745F","url":null,"abstract":"<p >Recent progress in the growth and development of unconventional electronics engineered on plastic and even elastomeric substrates with flexibility and stretchability has opened up new opportunities for unprecedented applications over the past few years, especially of relevance in electronic skin and bio-integrated systems. The associated assembly technologies provide the ability to accommodate demanding forms of unusual shapes, mechanical flexure, and stretching structures that are not allowed for conventional silicon-based applications. Specifically, mechanically guided designs with advanced classes of inorganic electronic components including metal-oxides and nanostructures can offer mechanical properties with superior performance and functionality to organic materials, which have comparatively limited characteristics, allowing high-density device integration onto various soft and curvilinear shapes. This review summarizes the several approaches and current state-of-the art of the development of stretchable electronics based on inorganic semiconducting materials. Trends from the diverse structural geometries for functional device designs and fundamental principles of device components and modules to the key fabrication methods and the essential investigations, various stretchable device applications and recent developments in system demonstrations are fully covered. Finally, future prospects and perspectives on the challenges and opportunities for the inorganic based stretchable electronics are also provided.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 48","pages":" 19323-19351"},"PeriodicalIF":5.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810791","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":"The HfO2 ferroelectric–metal heterojunction and its emergent electrostatic potential: comparison with ZrO2 and SiO2","authors":"Maria Helena Braga and Antonio Nuno Guerreiro","doi":"10.1039/D4TC02434F","DOIUrl":"https://doi.org/10.1039/D4TC02434F","url":null,"abstract":"<p >Transistors have been protagonists in the electronic device world since 1948. As miniaturization occurred, new materials, architectures, and fabrication strategies advanced. However, the choice of materials relative to getting the best chance to minimize Boltzmann's tyranny does not yet rely on predicting how the materials work together in heterojunctions. Herein, we show how conductors, Al and Cu, and insulators, ZrO<small>₂</small> and HfO<small>₂</small>, in a 2D horizontal contact cell, such as Cu/HfO<small>₂</small>/Al, align their surface potentials and, consequently, their chemical potentials besides their electrochemical potentials or Fermi levels, either at the interface or at the individual surfaces away from the interface, depending on the impedance at the interface. The materials show that they are connected and responsive as a system within a cm range. HfO<small>₂</small> may behave as a ferroelectric at nanoparticle sizes or when doped with Zr<small>⁴⁺</small> in HfO<small>₂</small>–ZrO<small>₂</small> mixtures. Herein, we show that the μm-sized loose particles of HfO<small>₂</small> with their stable crystalline structure can equalize their surface potentials and, consequently, their chemical potentials with the metals’ counterparts at the heterojunctions, at OCV, or in a closed circuit with a 1 kΩ resistor load, which has only been demonstrated before with ferroionics and ferroelectric glasses. The ability to propagate surface plasmon polaritons (SPPs) at THz-frequencies was also observed, superimposing the equalization of the surface potentials along the materials’ interfacial cross-sections. The μm-sized HfO<small>₂</small> shows a high capacity for polarizing, increasing its dielectric constant to &gt;10<small>⁵</small>, while characterized in Cu/HfO<small>₂</small>/Al and Cu/HfO<small>₂</small>/Cu cells by scanning Kelvin probe (SKP) with the probe at different heights, cyclic voltammetry (CV or <em>I</em>–<em>V</em>), and electrical impedance spectroscopy (EIS). Using <em>ab initio</em> simulations, the optimized crystalline structure and electrical, electrostatic, and thermal properties of HfO<small>₂</small> were determined: electron localization function (ELF), band structure, Fermi surface, thermal conductivity, and chemical potential <em>vs.</em> the number of charge carriers. We highlight that emergent ferroelectric and topologic plasmonic transport was distinctly observed for HfO<small>₂</small> in a horizontal-like cell containing two metal/HfO<small>₂</small> heterojunctions without electromagnetic pump application.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 48","pages":" 19386-19397"},"PeriodicalIF":5.7,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/tc/d4tc02434f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810788","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":"Noise suppression of 0D/2D flexible photodetectors mediated with atomically thin F–C functionalization on graphene channel†","authors":"Po-Hsuan Hsiao, Kuan-Han Lin, Chian Hsieh, Le Vo Phuong Thuan, Ming-Fa Lin and Chia-Yun Chen","doi":"10.1039/D4TC03739A","DOIUrl":"https://doi.org/10.1039/D4TC03739A","url":null,"abstract":"<p >Understanding the charge-formation and current-extraction dynamics of a zero-dimensional/two-dimensional (0D/2D) hybrid system remains challenging. Here, by incorporating 0D carbon quantum dots with 2D F–C functionalized graphene, we designed UV photodetectors that exhibit an outstanding photoresponsivity of 4.66 × 10<small>⁶</small> A W<small>⁻¹</small> and noise-involved detectivity of 2.7 × 10<small>¹⁷</small> jones, demonstrating frequency-dependent noise suppression.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 47","pages":" 19049-19057"},"PeriodicalIF":5.7,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777985","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":"Correction: In optimized rubrene-based nanoparticle blends for photon upconversion, singlet energy collection outcompetes triplet-pair separation, not singlet fission","authors":"David G. Bossanyi, Yoichi Sasaki, Shuangqing Wang, Dimitri Chekulaev, Nobuo Kimizuka, Nobuhiro Yanai and Jenny Clark","doi":"10.1039/D4TC90195A","DOIUrl":"https://doi.org/10.1039/D4TC90195A","url":null,"abstract":"<p >Correction for ‘In optimized rubrene-based nanoparticle blends for photon upconversion, singlet energy collection outcompetes triplet-pair separation, not singlet fission’ by David G. Bossanyi <em>et al.</em>, <em>J. Mater. Chem. C</em>, 2022, <strong>10</strong>, 4684–4696, https://doi.org/10.1039/D1TC02955J.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 47","pages":" 19307-19307"},"PeriodicalIF":5.7,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/tc/d4tc90195a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778052","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":"High-performance, narrow-band green-emitting phosphors for white LEDs: recent advances and perspectives","authors":"Yujia Wan, Dongjie Liu, Wei Yang, Yingsheng Wang, Min Zhang, Hongzhou Lian, Peipei Dang, Guogang Li and Jun Lin","doi":"10.1039/D4TC04457F","DOIUrl":"https://doi.org/10.1039/D4TC04457F","url":null,"abstract":"<p >An ultrawide-color-gamut backlight is crucial for achieving ultrahigh definition and ultrahigh resolution liquid crystal displays (LCDs), where green-emitting phosphors with narrow spectral emission are the decisive factors. However, the key green-emitting phosphors currently used in light-emitting diode (LED) backlights, such as commercial β-SiAlON:Eu<small>²⁺</small>, have the disadvantages of a wide emission band and large particles. In order to display more colorful and vivid photographs, there is an urgent need to accelerate the development of narrow-band green-emitting phosphors with independent intellectual property rights and high quantum efficiency. This article outlines the design of green-emitting phosphors and the improvement of their luminescent properties. From a design perspective, an optimal phosphor must consider the host material and the activator. The emission bands of Tb<small>³⁺</small>, Mn<small>²⁺</small>, Ce<small>³⁺</small> and Eu<small>²⁺</small> are usually located in the visible region, and the short luminesence decay time of Eu<small>²⁺</small>/Ce<small>³⁺</small> makes it a potential activator for high-quality displays. In the exploration and selection of hosts for novel phosphors, approaches such as single-particle diagnosis, high-throughput density functional theory (DFT) calculations and mineral-inspired prototype evolution are commonly employed. Thermal stability and quantum efficiency (QE) are critical properties for phosphors, and various strategies to enhance these characteristics are discussed herein. Moreover, the color gamuts of various green-emitting phosphors are presented, highlighting their applications in green-emitting phosphor-based WLEDs used in LCD screens and projectors. These WLEDs display more vivid image quality than the conventional commercial WLEDs. Finally, the future outlook on exploring and developing green-emitting phosphors with enhanced performance is discussed.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":" 1","pages":" 16-30"},"PeriodicalIF":5.7,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/tc/d4tc04457f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859380","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}