Materials Horizons最新文献

{"title":"Conductive and antibacterial dual-network hydrogel for soft bioelectronics†","authors":"Huiqi Sun, Sai Wang, Fan Yang, Mingyi Tan, Ling Bai, Peipei Wang, Yingying Feng, Wenbo Liu, Rongguo Wang and Xiaodong He","doi":"10.1039/D3MH00813D","DOIUrl":"10.1039/D3MH00813D","url":null,"abstract":"<p >Conductive hydrogels have shown significant potential for use in soft bioelectronics due to their unique similarities to biological tissue, including high water content, low modulus, and conductivity. However, their high water content makes them susceptible to absorbing microorganisms and promoting bacterial growth, which can trigger an immune response. Besides, the adhesion and biocompatibility of the hydrogel are not satisfactory, seriously limiting the conductive hydrogel's high-performance applications in human healthcare monitoring. Herein, the problem is addressed by introducing borax through a swelling and a semi-dehydration method into the interpenetrated network of a polyvinyl alcohol and poly(acrylic acid) hydrogel. The hydrogel exhibits both outstanding antibacterial (&gt;99.99% toward <em>E. coli</em> and <em>S. aureus</em>) activity and high ionic conductivity, in addition to tissue-like softness, strong wet-tissue adhesion (600 J m<small>⁻²</small> for skin), environmental stability, and excellent biocompatibility. Furthermore, the as-prepared hydrogel can serve as a biosensing conductor, showing high-quality recording and monitoring of real-time tiny yet complex muscle movements during speaking and realizing neuromodulation through low-current electronic stimulation (40 μA) of a rat's nerve. Simultaneously, the hydrogel also exhibits the capacity to accelerate wound healing. Therefore, the proposed antibacterial conductive hydrogel is a safer option for next-generation bioelectronic materials in human healthcare.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5805-5821"},"PeriodicalIF":13.3,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41186091","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":"Highly conductive and porous lignin-derived carbon fibers†","authors":"Guosheng Jia, Yan Yu, Xuefen Wang, Chao Jia, Zexu Hu, Senlong Yu, Hengxue Xiang and Meifang Zhu","doi":"10.1039/D3MH01027A","DOIUrl":"10.1039/D3MH01027A","url":null,"abstract":"<p >Bio-based carbon fibers derived from lignin have gained significant attention due to their diverse and renewable sources, ease of extraction, and low cost. However, the current limitations of low specific surface area and insufficient electrical conductivity hinder the widespread application of lignin-derived carbon fibers (LCFs). In this work, highly conductive and porous LCFs are developed through melt-blowing, pretreatment, and carbonization processes. The effects of the carbonization temperature and heating rate on the structures and properties of the LCFs are systematically investigated. The resultant LCFs exhibit high electrical conductivity (71 400 S m<small>⁻¹</small>) and a large specific surface area (923 m<small>²</small> g<small>⁻¹</small>). The assembled lithium-ion battery based on the LCF anodes demonstrates a long cycle life of &gt;800 cycles and a high specific capacity of 466 mA h g<small>⁻¹</small>. The findings of this study hold practical significance for promoting the utilization of lignin in the fields of energy storage, adsorption, and beyond.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5847-5858"},"PeriodicalIF":13.3,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41230525","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 future of metal–organic frameworks and covalent organic frameworks: rational synthesis and customized applications","authors":"Xing Han, Wenqiang Zhang, Zhijie Chen, Yan Liu and Yong Cui","doi":"10.1039/D3MH01396K","DOIUrl":"10.1039/D3MH01396K","url":null,"abstract":"<p >Metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) are designable and tunable functional crystalline porous materials that have been explored for applications such as catalysis, chemical sensing, water harvesting, gas storage, and separation. On the basis of reticular chemistry, the rational design and synthesis of MOFs and COFs allows us to have unprecedented control over their structural features and functionalities. Given the vast number of possible MOF and COF structures and the flexibility of modifying them, it remains challenging to navigate the infinite chemical space solely through a trial-and-error process. This Opinion Article provides a brief perspective of the current state and future prospects of MOFs and COFs. We envision that emerging technologies based on machine learning and robotics, such as high-throughput computational screening and fully automatic synthesis, can potentially address some challenges facing this field, accelerating the discovery of porous framework materials and the development of rational synthetic strategies for customized applications.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5337-5342"},"PeriodicalIF":13.3,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41230533","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":"Development of self-cooperative nanochaperones with enhanced activity to facilitate protein refolding†","authors":"Menglin Yang, Yanli Zhang, Fei Deng, Xiaohui Wu, Yujie Chen, Feihe Ma and Linqi Shi","doi":"10.1039/D3MH00619K","DOIUrl":"10.1039/D3MH00619K","url":null,"abstract":"<p >Regulating protein folding including assisting <em>de novo</em> folding, preventing misfolding and aggregation, and facilitating refolding of proteins are of significant importance for retaining protein's biological activities. Here, we report a mixed shell polymeric micelle (MSPM)-based self-cooperative nanochaperone (self-<em><small>CO</small></em>-nChap) with enhanced activity to facilitate protein refolding. This self-<em><small>CO</small></em>-nChap was fabricated by introducing Hsp40-mimetic artificial carriers into the traditional nanochaperone to cooperate with the Hsp70-mimetic confined hydrophobic microdomains. The artificial carrier facilitates transfer and immobilization of client proteins into confined hydrophobic microdomains, by which significantly improving self-<em><small>CO</small></em>-nChap's capability to inhibit unfolding and aggregation of client proteins, and finally facilitating refolding. Compared to traditional nanochaperones, the self-<em><small>CO</small></em>-nChap significantly enhances the thermal stability of horseradish peroxidase (HRP) epicyclically under harsher conditions. Moreover, the self-<em><small>CO</small></em>-nChap efficiently protects misfolding-prone proteins, such as immunoglobulin G (IgG) antibody from thermal denaturation, which is hardly achieved using traditional nanochaperones. In addition, a kinetic partitioning mechanism was devised to explain how self-<em><small>CO</small></em>-nChap facilitates refolding by regulating the cooperative effect of kinetics between the nanochaperone and client proteins. This work provides a novel strategy for the design of protein folding regulatory materials, including nanochaperones.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5547-5554"},"PeriodicalIF":13.3,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41230524","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":"Giant thermal rectification efficiency by geometrically enhanced asymmetric non-linear radiation†","authors":"Seongkyun Kim, Taeyeop Kim, Jaehyun Sung, Yongjun Kim, Dongwoo Lee and Seunghyun Baik","doi":"10.1039/D3MH01382K","DOIUrl":"10.1039/D3MH01382K","url":null,"abstract":"<p >Thermal rectification is an asymmetric heat transport phenomenon where thermal conductance changes depending on the temperature gradient direction. The experimentally reported efficiency of thermal rectification materials and devices, which are applicable for a wide range of temperatures, is relatively low. Here we report a giant thermal rectification efficiency of 218% by maximizing asymmetry in parameters of the Stefan–Boltzmann law for highly non-linear thermal radiation. The asymmetry in emissivity is realized by sputter-depositing manganese (<em>ε</em> = ∼0.38) on the top right half surface of a polyurethane specimen (<em>ε</em> = ∼0.98). The surface area of the polyurethane side is also dramatically increased (1302%) by 3D printing to realize asymmetry in geometry. There is an excellent agreement between the experimentally measured temperature profiles and finite element simulation results, demonstrating the reliability of the analysis. Machine learning analysis reveals that the surface area is a dominant factor for thermal rectification and suggests novel light-weight designs with high efficiencies. This work may find applications in energy efficient thermal rectification management of electronic devices and housings.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5720-5728"},"PeriodicalIF":13.3,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41095204","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":"Self-assembly of perovskite nanoplates in colloidal suspensions†","authors":"Raphael F. Moral, Antônio A. Malfatti-Gasperini, Luiz G. Bonato, Brener R. C. Vale, André F. V. Fonseca, Lazaro A. Padilha, Cristiano L. P. Oliveira and Ana F. Nogueira","doi":"10.1039/D3MH01401K","DOIUrl":"10.1039/D3MH01401K","url":null,"abstract":"<p >In recent years, perovskite nanocrystal superlattices have been reported with collective optical phenomena, offering a promising platform for both fundamental science studies and device engineering. In this same avenue, superlattices of perovskite nanoplates can be easily prepared on different substrates, and they too present an ensemble optical response. However, the self-assembly and optical properties of these aggregates in solvents have not been reported to date. Here, we report on the conditions for this self-assembly to occur and show a simple strategy to induce the formation of these nanoplate stacks in suspension in different organic solvents. We combined wide- and small-angle X-ray scattering and scanning transmission electron microscopy to evaluate CsPbBr<small>₃</small> and CsPbI<small>₃</small> perovskite nanoplates with different thickness distributions. We observed the formation of these stacks by changing the concentration of nanoplates and the viscosity of the colloidal suspensions, without the need for antisolvent addition. We found that, in hexane, the concentration for the formation of the stacks is rather high and approximately 80 mg mL<small>⁻¹</small>. In contrast, in decane, dodecane, and hexadecane, we observe a much easier self-assembly of the nanoplates, presenting a clear correlation between the degree of aggregation and viscosity. We, then, discuss the impact of the self-assembly of perovskite nanoplates on Förster resonant energy transfer. Our predictions suggest an energy transfer efficiency higher than 50% for all the donor–acceptor systems evaluated. In particular, we demonstrate how the aggregation of these particles in hexadecane induces FRET for CsPbBr<small>₃</small> nanowires. For the <em>n</em> = 2 nanowires (donor) to the <em>n</em> = 3 nanowires (acceptor), the FRET rate was found to be 4.1 ns<small>⁻¹</small>, with an efficiency of 56%, in agreement with our own predictions.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5822-5834"},"PeriodicalIF":13.3,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41230532","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":"Reversible and high-contrast thermal conductivity switching in a flexible covalent organic framework possessing negative Poisson's ratio†","authors":"Sandip Thakur and Ashutosh Giri","doi":"10.1039/D3MH01417G","DOIUrl":"10.1039/D3MH01417G","url":null,"abstract":"<p >The ability to dynamically and reversibly control thermal transport in solid-state systems can redefine and propel a plethora of technologies including thermal switches, diodes, and rectifiers. Current material systems, however, do not possess the swift and large changes in thermal conductivity required for such practical applications. For instance, stimuli responsive materials, that can reversibly switch between a high thermal conductivity state and a low thermal conductivity state, are mostly limited to thermal switching ratios in the range of 1.5 to 4. Here, we demonstrate reversible thermal conductivity switching with an unprecedented 18× change in thermal transport in a highly flexible covalent organic framework with revolving imine bonds. The pedal motion of the imine bonds is capable of reversible transformations of the framework from an expanded (low thermal conductivity) to a contracted (high thermal conductivity) phase, which can be triggered through external stimuli such as exposure to guest adsorption and desorption or mechanical strain. We also show that the dynamic imine linkages endow the material with a negative Poisson's ratio, thus marking a regime of materials design that combines low densities with exceptional thermal and mechanical properties.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5484-5491"},"PeriodicalIF":13.3,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2023/mh/d3mh01417g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41230531","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":"Modulating redox properties of solid-state ion-conducting materials using microwave irradiation","authors":"J. M. Serra, M. Balaguer, J. Santos-Blasco, J. F. Borras-Morell, B. Garcia-Baños, P. Plaza-Gonzalez, D. Catalán-Martínez, F. Penaranda-Foix, A. Domínguez, L. Navarrete and J. M. Catala-Civera","doi":"10.1039/D3MH01339A","DOIUrl":"10.1039/D3MH01339A","url":null,"abstract":"<p >The industrial adoption of low-carbon technologies and renewable electricity requires novel tools for electrifying unitary steps and efficient energy storage, such as the catalytic synthesis of valuable chemical carriers. The recently-discovered use of microwaves as an effective reducing agent of solid materials provides a novel framework to improve this chemical-conversion route, thanks to promoting oxygen-vacancy formation and O<small>₂</small>-surface exchange at low temperatures. However, many efforts are still required to boost the redox properties and process efficiency. Here, we scrutinise the dynamics and the physicochemical dependencies governing microwave-induced redox transformations on solid-state ion-conducting materials. The reduction is triggered upon a material-dependent induction temperature, leading to a characteristically abrupt rise in electric conductivity. This work reveals that the released O<small>₂</small> yield strongly depends on the material's composition and can be tuned by controlling the gas-environment composition and the intensity of the microwave power. The reduction effect prevails at the grain surface level and, thus, amplifies for fine-grained materials, and this is ascribed to limitations in oxygen-vacancy diffusion across the grain compared to a microwave-enhanced surface evacuation. The precise cyclability and stability of the redox process will enable multiple applications like gas depuration, energy storage, or hydrogen generation in several industrial applications.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5796-5804"},"PeriodicalIF":13.3,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2023/mh/d3mh01339a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41181391","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":"Real-time correlation of crystallization and segmental order in conjugated polymers†","authors":"Shaochuan Luo, Yukun Li, Nan Li, Zhiqiang Cao, Song Zhang, Michael U. Ocheje, Xiaodan Gu, Simon Rondeau-Gagné, Gi Xue, Sihong Wang, Dongshan Zhou and Jie Xu","doi":"10.1039/D3MH00956D","DOIUrl":"10.1039/D3MH00956D","url":null,"abstract":"<p >Modulating the segmental order in the morphology of conjugated polymers is widely recognized as a crucial factor for achieving optimal electronic properties and mechanical deformability. However, it is worth noting that the segmental order is typically associated with the crystallization process, which can result in rigid and brittle long-range ordered crystalline domains. To precisely control the morphology, a comprehensive understanding of how highly anisotropic conjugated polymers form segmentally ordered structures with ongoing crystallization is essential, yet currently elusive. To fill this knowledge gap, we developed a novel approach with a combination of stage-type fast scanning calorimetry and micro-Raman spectroscopy to capture the series of specimens with a continuum in the polymer percent crystallinity and detect the segmental order in real-time. Through the investigation of conjugated polymers with different backbones and side-chain structures, we observed a generally existing phenomenon that the degree of segmental order saturates before the maximum crystallinity is achieved. This disparity allows the conjugated polymers to achieve good charge carrier mobility while retaining good segmental dynamic mobility through the tailored treatment. Moreover, the crystallization temperature to obtain optimal segmental order can be predicted based on <em>T</em><small>_g</small> and <em>T</em><small>_m</small> of conjugated polymers. This in-depth characterization study provides fundamental insights into the evolution of segmental order during crystallization, which can aid in designing and controlling the optoelectronic and mechanical properties of conjugated polymers.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 1","pages":" 196-206"},"PeriodicalIF":13.3,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41090533","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: A wearable colorimetric sweat pH sensor-based smart textile for health state diagnosis","authors":"Ji-Hwan Ha, Yongrok Jeong, Junseong Ahn, Soonhyoung Hwang, Sohee Jeon, Dahong Kim, Jiwoo Ko, Byeongmin Kang, Young Jung, Jungrak Choi, Hyeonseok Han, Jimin Gu, Seokjoo Cho, Hyunjin Kim, Moonjeong Bok, Su A. Park, Jun-Ho Jeong and Inkyu Park","doi":"10.1039/D3MH90058D","DOIUrl":"10.1039/D3MH90058D","url":null,"abstract":"<p >Correction for ‘A wearable colorimetric sweat pH sensor-based smart textile for health state diagnosis’ by Ji-Hwan Ha <em>et al.</em>, <em>Mater. Horiz.</em>, 2023, <strong>10</strong>, 4163–4171, https://doi.org/10.1039/d3mh00340j.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 12","pages":" 5983-5983"},"PeriodicalIF":13.3,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2023/mh/d3mh90058d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41092361","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}