Applied Materials Today最新文献_第9页

Harvesting of shear piezoelectricity in a molded multicomponent crystal disc 在模制多组分晶体盘中采集剪切压电效应

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-24 DOI: 10.1016/j.apmt.2024.102344

Suman Bhattacharya, Pierre-Andre Cazade, Krishna Hari, Tara Ryan, Lynette Keeney, Charlie O'Mahony, Sarah Guerin

{"title":"Harvesting of shear piezoelectricity in a molded multicomponent crystal disc","authors":"Suman Bhattacharya, Pierre-Andre Cazade, Krishna Hari, Tara Ryan, Lynette Keeney, Charlie O'Mahony, Sarah Guerin","doi":"10.1016/j.apmt.2024.102344","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102344","url":null,"abstract":"Biomolecular piezoelectrics, such as amino acids and peptides, exhibit significant shear piezoelectric responses in single crystal form. However, naturally occurring longitudinal piezoelectricity is rare and, when present, is dampened due to the multi-directional self-assembly in polycrystalline device layers. Here we utilise cocrystallisation to engineer a multicomponent crystalline salt hydrate of (+)Mandelic Acid and LLysine, (). This material exhibits a predicted single crystal longitudinal piezoelectric response of d = 3.5 pC/N. In polycrystalline form, grows as an assembly of plates which increases the measured longitudinal piezoelectricity to 11 pC/N in its macroscopic solid-state. This is due to contributions from the shear piezoelectric response d = 10.8 pC/N, originating from the presence of plates oriented at acute angles relative to the surface. The brittleness of the crystals ( = 37 GPa) is overcome by reinforcing the substrate-free piezoelectric disc with a thin polymer coating to prevent flaking. Structural analysis confirms that the triclinic structure of gives rise to this increased response due to the relative orientations of individual crystallites. Confined crystallisation of this multi-component form with a plate-like morphology, results in macroscopic self-assembly of an amino acid cocrystal that allows for the harvesting of higher shear piezoelectricity, but in a facile longitudinal configuration.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"192 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931186","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

Ion implanted MXene electrodes for selective VOC sensors 用于选择性挥发性有机化合物传感器的离子注入 MXene 电极

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-23 DOI: 10.1016/j.apmt.2024.102343

Szymon Obrębowski, Kamila Ćwik, Shreyas Srivatsa, Tadeusz Uhl, Jacek Jagielski, Anna Wolska, Marcin Klepka, Zeinab Khosravizadeh, Rafał Jakieła, Małgorzata Trzyna-Sowa, Tomasz Wojciechowski, Nevill Gonzalez Szwacki, Wojciech Marynowski, Janusz Lewiński, Rafał Zybała, Michał A. Borysiewicz

{"title":"Ion implanted MXene electrodes for selective VOC sensors","authors":"Szymon Obrębowski, Kamila Ćwik, Shreyas Srivatsa, Tadeusz Uhl, Jacek Jagielski, Anna Wolska, Marcin Klepka, Zeinab Khosravizadeh, Rafał Jakieła, Małgorzata Trzyna-Sowa, Tomasz Wojciechowski, Nevill Gonzalez Szwacki, Wojciech Marynowski, Janusz Lewiński, Rafał Zybała, Michał A. Borysiewicz","doi":"10.1016/j.apmt.2024.102343","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102343","url":null,"abstract":"Robust means of MXene functionalization are needed to industrialize the huge research interest that these materials see. Although there have been many reports on functionalized MXenes used for vapor sensing, most have focused on non-uniform additives such as nanoparticles, polymers, graphene etc. resulting in outstanding results, however achieved with techniques difficult to reproduce consistently. In this work a new approach to MXene functionalization for VOC sensing is proposed - implantation of screen printed MXene films with selected metal ions. This approach is highly reproducible and uniform on its own, but also yields no metallic phases in the films leading to classical doping. Using X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy the processes taking place TiCT during implantation are explained. The ion distribution is modeled and measured using secondary ion mass spectrometry, as well as discuss the limitations of the technique. Finally, it is shown that by setting together an array of virgin and Ni, Cu and Pd-doped TiCT electrodes, it is possible to differentiate between 5 VOC and water in the operationally relevant range. This approach shows a blueprint for functionalization with other ions using implantation not only for sensing, but also for other MXene applications.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"30 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931187","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

Ultrastrong and ductile NiTi-based composite with large recoverable strain mediated by a compositionally complex phase 超强韧性镍钛基复合材料，在成分复杂相的介导下具有较大的可恢复应变

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-23 DOI: 10.1016/j.apmt.2024.102347

Jiayi Geng, Yunzhu Shi, Pere Barriobero-Vila, Meiyuan Jiao, Yihuan Cao, Yu Tang, Jingzhi He, Chao Ma, Yan Ma, Zhifeng Lei, Zhaoping Lu

{"title":"Ultrastrong and ductile NiTi-based composite with large recoverable strain mediated by a compositionally complex phase","authors":"Jiayi Geng, Yunzhu Shi, Pere Barriobero-Vila, Meiyuan Jiao, Yihuan Cao, Yu Tang, Jingzhi He, Chao Ma, Yan Ma, Zhifeng Lei, Zhaoping Lu","doi":"10.1016/j.apmt.2024.102347","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102347","url":null,"abstract":"NiTi-based composites possess great potential for concurrently improving both mechanical and functional properties. However, relying on traditional alloy design principles limits the design space and greatly hinders the advancement of high-performance NiTi-based composites. The concept of high-entropy alloys has expanded the compositional landscape, unveiling unique structural characteristics for alloy design and providing new prospects for addressing these limitations. Here, we report a compositionally complex NiTi-based composite that exhibits exceptional strength and ductility, along with remarkable recoverable strain. The composite, NiTi(NbMoTaW) (at.%), comprises a 78.0 % B2 NiTi matrix, a 19.2 % Nb-Mo-Ta-W-Ti-Ni compositionally complex body-centered cubic (BCC) phase, and a small amount of TiNi. Notably, this composite demonstrates an engineering compressive strength of 3274 MPa, with a compressive fracture strain of 44.2 % and a maximum recoverable strain of 7.3 % (5.6 % elastic strain and 1.7 % inelastic recoverable strain). These outstanding mechanical properties result from the unique structural characteristics of the compositionally complex phase and the lattice strain matching induced by phase transitions. The substantial recoverable strain was obtained through the reversible B2⇌R⇌B19′ phase transition. This work not only innovates a new category of high-performance NiTi-based composites but also extends the applicability of the high-entropy concept.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"84 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931188","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

Nanozyme-enhanced mitophagy to improve the efficacy of mesenchymal stem cells in myocardial infarction therapy 纳米酶增强有丝分裂，提高间充质干细胞在心肌梗死治疗中的疗效

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-23 DOI: 10.1016/j.apmt.2024.102333

Zeyi Sun, Tianxiao Mei, Yuanfeng Xin, Tianhao Tan, Muladili Mutailipu, Laihai Zhang, Tieyan Li, Hao Cao, Yihui Hu, Zhongmin Liu, Wenjun Le

{"title":"Nanozyme-enhanced mitophagy to improve the efficacy of mesenchymal stem cells in myocardial infarction therapy","authors":"Zeyi Sun, Tianxiao Mei, Yuanfeng Xin, Tianhao Tan, Muladili Mutailipu, Laihai Zhang, Tieyan Li, Hao Cao, Yihui Hu, Zhongmin Liu, Wenjun Le","doi":"10.1016/j.apmt.2024.102333","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102333","url":null,"abstract":"Mesenchymal stem cell therapy has emerged as a promising approach for the treatment of myocardial infarction. However, the challenge of low cell survival and retention post injection, particularly under the high levels of reactive oxygen species (ROS) and oxidative stress at the infarct site, has hindered their clinical application. Additionally, traditional drug delivery methods, such as intravenous injection, cannot meet the demand for long-term stem cell residence at the infarct site, which is another critical issue that impedes the therapeutic efficacy of stem cells. Herein, we synthesized indocyanine green-enriched Prussian blue nanozyme, called PB@PEI@ICG, which not only possessed remarkable ROS scavenging capability but also exhibited superior fluorescent tracer property. Subsequently, we engineered mesenchymal stem cells (MSCs) with PB@PEI@ICG by co-culture and found that the introduction of the nanozyme significantly enhanced mitophagy by BNIP3 and PINK1 pathways, which in turn promoted ROS scavenging and protected MSCs from cell death induced by the harsh infarct microenvironment. Furthermore, we employed pericardial injection as an alternative delivery method to prolong the residence time of MSCs at the infarct site, enabling real-time tracking via the fluorescence property of the nanozymes. The results demonstrated that PB@PEI@ICG nanozyme could significantly improve the survival and retention of MSCs at the infarct site, thereby enhancing the therapeutic effect for myocardial infarction. In conclusion, this study presents a novel strategy for stem cell therapy in myocardial infarction by using mitophagy-enhancing nanozyme to scavenge ROS for enhancing the therapeutic potential of stem cells.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"126 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931189","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

Sn0.06Cr[formula omitted]Te[formula omitted]: A skyrmion superconductor Sn0.06Cr[式略]Te[式略]：一种锡兰超导体

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-23 DOI: 10.1016/j.apmt.2024.102328

Shubham Purwar, Anumita Bose, Achintya Low, Satyendra Singh, R. Venkatesh, Awadhesh Narayan, Setti Thirupathaiah

{"title":"Sn0.06Cr[formula omitted]Te[formula omitted]: A skyrmion superconductor","authors":"Shubham Purwar, Anumita Bose, Achintya Low, Satyendra Singh, R. Venkatesh, Awadhesh Narayan, Setti Thirupathaiah","doi":"10.1016/j.apmt.2024.102328","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102328","url":null,"abstract":"Topological superconductors are an exciting class of quantum materials from the point of view of the fundamental sciences and potential technological applications. Here, we report on the successful introduction of superconductivity in a ferromagnetic layered skyrmion system CrTe, obtained by the Sn intercalation, below a transition temperature of 3.5 K. We observe several interesting physical properties, such as superconductivity, magnetism, and the topological Hall effect, simultaneously in this system. Despite the magnetism and Meissner effects being anisotropic, the superconductivity observed from the in-plane electrical resistivity () is nearly isotropic between and , suggesting separate channels of conduction electrons responsible for the superconductivity and magnetism of this system, which is also supported by our spin-resolved DFT calculations. We identify two orders of higher carrier density in superconducting SnCrTe than the parent CrTe. A jump in the specific heat is noticed around the with a volume fraction of 33%, confirming the bulk superconductivity in SnCrTe. In addition to the introduction of superconductivity, tuning of topological Hall properties is noticed with Sn intercalation. Our observation of superconductivity in a skyrmion lattice brings up a new class of topological quantum materials.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"128 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931190","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

Versatile hydrogel-based drug delivery platform for multimodal cancer therapy from bench to bedside 基于水凝胶的多功能给药平台，用于从工作台到床边的多模式癌症治疗

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-22 DOI: 10.1016/j.apmt.2024.102341

Yijun Mei, Jingyi Hu, Yuanyuan Cao, Xueyu Gao, Lu Tang, Wei Wang

{"title":"Versatile hydrogel-based drug delivery platform for multimodal cancer therapy from bench to bedside","authors":"Yijun Mei, Jingyi Hu, Yuanyuan Cao, Xueyu Gao, Lu Tang, Wei Wang","doi":"10.1016/j.apmt.2024.102341","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102341","url":null,"abstract":"Hydrogel exhibits a promising application prospect for multimodal cancer therapy in clinic compared with other conventional drug delivery platforms, which is predominantly attributed to its excellent biocompatibility, local injectability and retention, sustained drug release behavior, multiple administration approaches, and flexible drug loading capacity. Hydrogel can be further classified into physical, chemical, and multiple crosslinked hydrogels according to the formation mechanisms. The emergence of hydrogel enables antineoplastic agents to be delivered in much broader routes compared with numerous traditional carriers. Intratumoral injection, peritumoral injection, and postoperative implantation are regarded as the three momentous approaches for administrating macroscopic hydrogel, while nanoscopic hydrogel can also be applied through intravenous injection. In addition, both monotherapy and combination therapy against cancer are available to be realized through hydrogel delivery system, providing a valuable opportunity to enhance antitumor effect and achieve synergistic efficacy. Recently, several hydrogel products have already been approved by FDA, exerting essential roles against cancer in clinic. Meanwhile, there have also been various types of hydrogel delivery systems for cancer therapy in clinical trial stage. To sum up, hydrogel is a versatile drug delivery platform with good clinical translation potential, offering a promising and meaningful strategy for cancer therapy.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"3 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931191","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

Europium-based complex crosslinked with hyaluronic acid sponge with controllable adaptive capability to promote effective scarless regeneration of burn wound 与透明质酸海绵交联的铕基复合物具有可控的适应能力，可促进烧伤创面的有效无痕再生

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-21 DOI: 10.1016/j.apmt.2024.102340

Xiuhong Huang, Liqin Zheng, Lihua Li, Licheng Lin, Zonghua Liu, Changren Zhou

{"title":"Europium-based complex crosslinked with hyaluronic acid sponge with controllable adaptive capability to promote effective scarless regeneration of burn wound","authors":"Xiuhong Huang, Liqin Zheng, Lihua Li, Licheng Lin, Zonghua Liu, Changren Zhou","doi":"10.1016/j.apmt.2024.102340","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102340","url":null,"abstract":"The occurrence of severe skin burns may lead to delayed wound healing and persistent scarring. Agents that promote angiogenesis hold great promise for enhancing the effectiveness of wound healing, while modulation of oxidative stress, inflammation, and anti-fibrotic cytokines exhibits significant potential in alleviating scars. In this study, a novel hyaluronic acid- chitooligosaccharides/europium (HA-CE) sponge was prepared. HA-CE sponge were highly absorbent and could scavenge free radicals, as well as promoted macrophages polarized toward M2. HA-CE sponge also promoted the angiogenesis, which was related to the increased vascular endothelial growth factor (VEGF) expression. The expression of CD26 in fibroblast was down-regulated and the transforming growth factor-β3 (TGF-β3) was elevated by HA-CE sponge. The HA-CE sponge in the burnt wound model enhanced angiogenesis and anti-inflammatory responses, thereby accelerating healing of burnt wounds and ameliorating scarring-related factors to inhibit scar formation. These findings identified HA-CE sponge had potential to be developed as a dressing for burnt skin wound.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"303 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931192","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

Interplay of piezoelectricity and electrical stimulation in tissue engineering and regenerative medicine 组织工程和再生医学中压电和电刺激的相互作用

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-20 DOI: 10.1016/j.apmt.2024.102332

Kuntal Kumar Das, Bikramjit Basu, Pralay Maiti, Ashutosh Kumar Dubey

{"title":"Interplay of piezoelectricity and electrical stimulation in tissue engineering and regenerative medicine","authors":"Kuntal Kumar Das, Bikramjit Basu, Pralay Maiti, Ashutosh Kumar Dubey","doi":"10.1016/j.apmt.2024.102332","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102332","url":null,"abstract":"Bioelectronic medicine, involving physiologically relevant biophysical stimulation and piezoelectric biomaterials is perceived to transform the field of regenerative bioelectronics. The combinatorial effect has shown remarkable potential in guiding cell behavior and promoting the development of functional tissue-engineered constructs. Smart piezoelectric biomaterials, capable of generating electric charges under mechanical stress or deformation, have emerged as key players in tissue engineering applications. This comprehensive review explores the interplay between electrical stimulation, piezoelectric biomaterials, and cell functionality in regeneration of neural, bone, cardiac, skin, and vascular tissues. The inherent electrical activity (biopiezoelectricity) empowers piezoelectric scaffolds to replicate natural processes in the extracellular matrix. The synergy between surface charge polarization or electric field stimulation and the functional properties of piezoelectric biomaterials have been critically analyzed. These analyses demonstrate how such synergistic effects can modulate cell functionality and tissue regeneration. Moreover, the integration of data science approaches has the potential to optimize the design of piezoelectric scaffolds for specific tissue engineering and regenerative medicine applications.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"61 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776095","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

Artificial nociceptor based on interface engineered ferroelectric volatile memristor 基于界面工程铁电挥发性记忆晶体管的人工痛觉感受器

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-20 DOI: 10.1016/j.apmt.2024.102346

Joonbong Lee, Myeong Seop Song, Woo-Sung Jang, Hojin Lee, Sangwoo Lee, Turgun Boynazarov, Young-Min Kim, Seung Chul Chae, Haider Abbas, Taekjib Choi

{"title":"Artificial nociceptor based on interface engineered ferroelectric volatile memristor","authors":"Joonbong Lee, Myeong Seop Song, Woo-Sung Jang, Hojin Lee, Sangwoo Lee, Turgun Boynazarov, Young-Min Kim, Seung Chul Chae, Haider Abbas, Taekjib Choi","doi":"10.1016/j.apmt.2024.102346","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102346","url":null,"abstract":"Recent advancements in neuromorphic computing driven by memristors, which emulate biological synapses and neurons, have spurred the development of innovative information technologies. To extend memristor applications to artificial nervous systems, electronic receptors are crucial for converting external stimuli into signals for the internal nervous system. Key requirements for integrating neuron devices into neuromorphic computing include achieving threshold behavior, minimizing power consumption, and ensuring compatibility with complementary metal-oxide semiconductor (CMOS) technology. Hafnium-based ferroelectric memristors are known for their robust ferroelectric properties at nanoscales and compatibility with CMOS technology. However, their non-volatile resistive switching has historically limited their suitability for neuron sensory applications requiring threshold switching. This study demonstrates threshold switching behavior in a TiN/HfZrO(HZO)/TiO/TiN heterostructure by incorporating a nanoscale TiO interfacial layer as an oxygen reservoir. This layer facilitates the formation of oxygen vacancies within the ferroelectric HZO layer, serving as internal charge trap sites. As a result, hafnium-based ferroelectric memristors exhibit volatile switching characteristics, enabling them to function as nociceptive devices through internal charge trapping and detrapping mechanisms. These volatile memristors are suitable for artificial nociceptor systems requiring responses such as threshold detection, relaxation, allodynia, and hyperalgesia to external stimuli. This capability opens avenues for developing advanced humanoid robots capable of rapid adaptation and response in challenging environments such as outer space or hazardous conditions, leveraging real-time sensory processing for effective operation and survival.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"13 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141931149","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

Singular tungsten disulfide core-shell and pure tungsten nanostructures 奇异的二硫化钨核壳和纯钨纳米结构

IF 8.3 2区材料科学

Applied Materials Today Pub Date : 2024-07-19 DOI: 10.1016/j.apmt.2024.102336

Jijiang He, Hongyu Zhang, Sehrina Eshon, Weike Zhang, Martin Saunders, Jeffrey M. Gordon, Hui Tong Chua

{"title":"Singular tungsten disulfide core-shell and pure tungsten nanostructures","authors":"Jijiang He, Hongyu Zhang, Sehrina Eshon, Weike Zhang, Martin Saunders, Jeffrey M. Gordon, Hui Tong Chua","doi":"10.1016/j.apmt.2024.102336","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102336","url":null,"abstract":"The first potentially scalable synthesis of core-shell tungsten disulfide (WS) nano-onions comprising a pure-tungsten core encased in WS shells (W@WS) is reported. Although W@WS nano-onions were achieved in earlier studies, all methods engendered practical drawbacks such as the need for toxic reagents, inherently customized small-scale processes, long reaction times, complex multi-step processes, and long reaction times, which precluded commercialization and widespread impact. Here, a promising, novel and scalable alternative is depicted which surmounts the limitations of previous procedures: the one-pot, catalyst-free, safe, rapid, high-temperature lamp ablation method, which starts with precursor 2H-WS, and is devoid of toxic chemicals. The major applications are exceptional solid lubricants stable at high temperatures, and excellent catalytic activity. Moreover, pure tungsten web-like nanostructures never before observed or predicted were found among the products - a finding of basic scientific value, awaiting the identification of major applications. Hollow WS nano-onions and nanotubes also emerged, but in far smaller quantities, and for understandable reasons that are addressed. Electron micrographs and a variety of material characterization methods permitted deducing reaction mechanisms that entailed (a) WS decomposing into elemental sulfur and tungsten, and, in parallel, (b) WS exfoliating into nano-platelets that bent and closed upon themselves. Some tungsten nanospheres independently conjoined to form the yet undiscovered pure-tungsten nano-webs. The formation of molten tungsten at temperatures well below the bulk's melting point was accounted for from the substantial melting-point depression as nanosphere diameter decreases.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"19 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775819","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