Small Methods最新文献_第6页

Design of Self-Standing Chiral Covalent-Organic Framework Nanochannel Membrane for Enantioselective Sensing. 设计用于对映选择性传感的自立手性共价有机框架纳米通道膜

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-11-02 DOI: 10.1002/smtd.202401120

Chen-Yan Zheng, Hai-Long Qian, Cheng Yang, Xiu-Ping Yan

{"title":"Design of Self-Standing Chiral Covalent-Organic Framework Nanochannel Membrane for Enantioselective Sensing.","authors":"Chen-Yan Zheng, Hai-Long Qian, Cheng Yang, Xiu-Ping Yan","doi":"10.1002/smtd.202401120","DOIUrl":"https://doi.org/10.1002/smtd.202401120","url":null,"abstract":"Nanochannel membranes are promising materials for enantioselective sensing. However, it is difficult to make a compromise between the selectivity and permeability in traditional nanochannel membranes. Therefore, new types of nanochannel membranes with high enantioselectivity and excellent permeability should be explored for chiral analysis. Here, asymmetric catalysis strategy is reported for interfacial polymerization synthesis of chiral covalent-organic framework (cCOF) nanochannel membrane for enantioselective sensing. Chiral phenylethylamine (S/R-PEA) and 2,4,6-triformylphloroglucinol (TP) are used to prepare chiral TP monomer. 4,4',4″-triaminotriphenylamine (TAPA) is then condensed with chiral TP to obtain cCOF nanochannel membrane via a C═N Schiff-base reaction. The molar ratio of TP to S/R-PEA is adjusted so that S/R-PEA is bound to the aldehyde only or both the aldehyde and hydroxyl groups on TP to obtain chiral-induced COF (cCOF-1) or both chiral-induced and modified COF (cCOF-2) nanochannel membrane, respectively. The prepared cCOF-2 nanochannel membrane showed two times more selectivity for limonene enantiomers than cCOF-1 nanochannel membrane. Furthermore, cCOF-2 nanochannel platform exhibited excellent sensing performance for other chiral molecules such as limonene, propanediol, methylbutyric acid, ibuprofen, and naproxen (limits of detection of 19-42 ng L-1, enantiomer excess of 63.6-86.3%). This work provides a promising way to develop cCOF-based nanochannel enantioselective sensor.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401120"},"PeriodicalIF":10.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563426","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

Precursor-Driven Confined Synthesis of Highly Pure 5-Armchair Graphene Nanoribbons. 前驱体驱动的高纯度 5 臂对轴石墨烯纳米带的封闭合成。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-11-02 DOI: 10.1002/smtd.202401168

Weili Cui, Wendi Zhang, Kunpeng Tang, Yingzhi Chen, Kecheng Cao, Lei Shi, Guowei Yang

{"title":"Precursor-Driven Confined Synthesis of Highly Pure 5-Armchair Graphene Nanoribbons.","authors":"Weili Cui, Wendi Zhang, Kunpeng Tang, Yingzhi Chen, Kecheng Cao, Lei Shi, Guowei Yang","doi":"10.1002/smtd.202401168","DOIUrl":"https://doi.org/10.1002/smtd.202401168","url":null,"abstract":"Armchair graphene nanoribbons (AGNRs) known as semiconductors are holding promise for nanoelectronics applications and sparking increased research interest. Currently, synthesis of 5-AGNRs with a quasi-metallic gap has been achieved using perylene and its halogen-containing derivatives as precursors via on-surface synthesis on a metal substrate. However, challenges in controlling the polymerization and orientation between precursor molecules have led to side reactions and the formation of by-products, posing a significant issue in purity. Here a precision synthesis of confined 5-AGNRs using molecular-designed precursors without halogens is proposed to address these challenges. Perylene and its dimer quaterrylene are utilized for filling into single-walled carbon nanotubes (SWCNTs), following a precursor-driven transition into 5-AGNRs by heat-induced polymerization and cyclodehydrogenation. SWCNTs restrict the alignment of confined quaterrylene enabling their polymerization with a head-to-tail arrangement, which results in the formation of pure 5-AGNRs with three times higher yield than that of perylene, as the free rotation capability of perylene molecules inside SWCNTs lead to the formation of 5-AGNRs concomitant with by-products. This work provides a templated route for synthesizing desired GNRs based on molecular-designed precursors and confined polymerization, bringing advantages for their applications in electronics and optoelectronics.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401168"},"PeriodicalIF":10.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563440","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

Advancements in Engineering Tetrahedral Framework Nucleic Acids for Biomedical Innovations. 用于生物医学创新的四面体框架核酸工程的进展。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-11-01 DOI: 10.1002/smtd.202401360

Qin Fan, Bicheng Sun, Jie Chao

{"title":"Advancements in Engineering Tetrahedral Framework Nucleic Acids for Biomedical Innovations.","authors":"Qin Fan, Bicheng Sun, Jie Chao","doi":"10.1002/smtd.202401360","DOIUrl":"https://doi.org/10.1002/smtd.202401360","url":null,"abstract":"Tetrahedral framework nucleic acids (tFNAs) are renowned for their controllable self-assembly, exceptional programmability, and excellent biocompatibility, which have led to their widespread application in the biomedical field. Beyond these features, tFNAs demonstrate unique chemical and biological properties including high cellular uptake efficiency, structural bio-stability, and tissue permeability, which are derived from their distinctive 3D structure. To date, an extensive range of tFNA-based nanostructures are intelligently designed and developed for various biomedical applications such as drug delivery, gene therapy, biosensing, and tissue engineering, among other emerging fields. In addition to their role in drug delivery systems, tFNAs also possess intrinsic properties that render them highly effective as therapeutic agents in the treatment of complex diseases, including arthritis, neurodegenerative disorders, and cardiovascular diseases. This dual functionality significantly enhances the utility of tFNAs in biomedical research, presenting valuable opportunities for the development of next-generation medical technologies across diverse therapeutic and diagnostic platforms. Consequently, this review comprehensively introduces the latest advancements of tFNAs in the biomedical field, with a focus on their benefits and applications as drug delivery nanoplatforms, and their inherent capabilities as therapeutic agents. Furthermore, the current limitations, challenges, and future perspectives of tFNAs are explored.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401360"},"PeriodicalIF":10.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563425","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

Photodual-Responsive Anthracene-Based 2D Covalent Organic Framework for Optoelectronic Synaptic Devices. 用于光电突触设备的光电互响应蒽基二维共价有机框架。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-31 DOI: 10.1002/smtd.202401341

Lei Zhao, Yang Gao, Xin Fu, Yu Chen, Bin Zhang, Fuzhen Xuan

{"title":"Photodual-Responsive Anthracene-Based 2D Covalent Organic Framework for Optoelectronic Synaptic Devices.","authors":"Lei Zhao, Yang Gao, Xin Fu, Yu Chen, Bin Zhang, Fuzhen Xuan","doi":"10.1002/smtd.202401341","DOIUrl":"https://doi.org/10.1002/smtd.202401341","url":null,"abstract":"To facilitate the development of efficient neuromorphic perception and computation, it is crucial to explore optoelectronic synaptic devices that integrate perceptual and computational capabilities. Various materials such as oxide semiconductors, conjugated organic polymers, transition metal sulfides, perovskite materials, and metal nanoparticles, along with their composites, are utilized in constructing these devices. However, optoelectronic synaptic devices based on 2D covalent organic frameworks (COFs) is rarely reported. In this study, an anthracene-based 2D COF (COF-DaTp) film is prepared using a room-temperature interface-confined strategy and utilized it as the active layer in an optoelectronic synaptic device with an Al/COF-DaTp/ITO configuration. The device demonstrated dual optoelectronic modulation, exhibiting significant optoelectronic resistive switching in response to light pulses, achieving 32 photoconductive states. Moreover, it exhibited history-dependent memristive behavior in voltage scans and electrical pulses, with a comparable diversity of 32 conductive states. The photodual-responsive properties of the COF-DaTp-based synaptic device enable it to simultaneously perform optical sensing and basic image denoising and recognition tasks, significantly enhancing recognition accuracy and reducing the number of training epochs compared to datasets without noise mitigation. This work opens the door for the application of 2D COF-based optoelectronic synaptic devices in visual computational processing.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401341"},"PeriodicalIF":10.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542408","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

High-Power and Long-Lifespan Rechargeable Ion Batteries based on Na⁺-Confined Na⁺/Mg²⁺ Coinsertion Chemistry. 基于 Na+-Confined Na+/Mg2+ Coinsertion 化学的高功率长寿命可充电离子电池。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-31 DOI: 10.1002/smtd.202401195

Fuyu Chen, Hong-Yi Li, Qing Zhong, Zijie Cai, Dong Wang, Jiang Diao, Guangsheng Huang, Jingfeng Wang, Fusheng Pan

{"title":"High-Power and Long-Lifespan Rechargeable Ion Batteries based on Na+-Confined Na+/Mg2+ Coinsertion Chemistry.","authors":"Fuyu Chen, Hong-Yi Li, Qing Zhong, Zijie Cai, Dong Wang, Jiang Diao, Guangsheng Huang, Jingfeng Wang, Fusheng Pan","doi":"10.1002/smtd.202401195","DOIUrl":"https://doi.org/10.1002/smtd.202401195","url":null,"abstract":"Magnesium-sodium hybrid ion batteries (MSHIBs) are expected to achieve excellent rate capability. However, existing MSHIB cathodes exhibit low ionic conductivity and poor structural stability, resulting in low power density and cycle lifespan. Herein, sodium-rich Na3.7V6O16·2.9H2O (Na-rich NVO) nanobelts are synthesized as MSHIB cathodes. Excess Na+ induced NaO5 and NaO3 interlayer pins, which ensures NVO structural stability to accommodate Mg2+ and Na+. They also confine the migration pathway of cations to the diffusion direction, lowering the migration barriers of Mg2+ and enhancing the ionic conductivity. Excess interlayer Na+ increases the electronic conductivity of the involved Na-rich NVO cathode. The cathode exhibits a high Mg2+ diffusion coefficient, and the resulting MSHIBs exhibit a power density of 3.4 kW kg-1 and a lifespan of 20 000 cycles at 5.0 A g-1, with a capacity retention rate of 85%. Overall, this study paves the way for designing and developing fast-charging secondary batteries.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401195"},"PeriodicalIF":10.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542407","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

Colorimetric Fabry-Pérot Sensor with Hetero-Structured Dielectric for Humidity Monitoring. 采用异质结构电介质的比色法布里-佩罗传感器用于湿度监测

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-31 DOI: 10.1002/smtd.202401485

Zhihuan Li, Lejie Tian, Wei Wu, Li Feng, Bakyt Khaniyev, Yerzhan Mukhametkarimov, Margulan Ibraimov, Feng Zhou, Weimin Liu, Jianxi Liu

{"title":"Colorimetric Fabry-Pérot Sensor with Hetero-Structured Dielectric for Humidity Monitoring.","authors":"Zhihuan Li, Lejie Tian, Wei Wu, Li Feng, Bakyt Khaniyev, Yerzhan Mukhametkarimov, Margulan Ibraimov, Feng Zhou, Weimin Liu, Jianxi Liu","doi":"10.1002/smtd.202401485","DOIUrl":"https://doi.org/10.1002/smtd.202401485","url":null,"abstract":"A full-color colorimetric humidity sensor with high brightness is proposed by using a hetero-structured dielectric film in a metal-insulator-metal (MIM) resonator. A humidity-responsive polymer is designed to graft on top of a metal-organic frameworks (MOFs) thin film (MOFs-Polymer) as insulator layer in the resonator. Programmable tuning of reflected color is achieved by controlling the polymer thicknesses, and finite difference time domain simulation of light-matter interactions at subwavelength scales proves the dependence of the reflected wavelength on dielectric layer thickness of the resonator. Vivid full-color changing is realized during tracking humidity process due to swelling of the stimuli-responsive polymer. Ultrafast response (≈0.75 s) is achieved for tracking trace H2O from H2O/methanol mixture, which is ≈104 faster than that of the pure polymer-based MIM resonator. Meanwhile, the study observes significant spectral redshift because the porous MOFs film facilitates the preconcentration of external stimulus and improves the detection sensitivity of the resonator. Further, double-channel anti-counterfeiting multiplexing imaging is devised on the MIM resonator by photomask technology. Patterned encoding for security label is achieved on the MIM resonator by engineering humidity-tunable pixels of Au/MOFs-Polymer/Au and humidity-invalid pixels of Au/MOFs/Au.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401485"},"PeriodicalIF":10.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542406","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

Synergistic Surface Engineering of BiVO₄ Photoanodes for Improved Photoelectrochemical Water Oxidation. 改进光电化学水氧化的 BiVO4 光阳极协同表面工程。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-31 DOI: 10.1002/smtd.202401443

Shan Wang, Zhijian Shi, Kunrong Du, Zhizhen Ren, Haifeng Feng, Jiaou Wang, Liang Wang, Dandan Cui, Yi Du, Weichang Hao

{"title":"Synergistic Surface Engineering of BiVO4 Photoanodes for Improved Photoelectrochemical Water Oxidation.","authors":"Shan Wang, Zhijian Shi, Kunrong Du, Zhizhen Ren, Haifeng Feng, Jiaou Wang, Liang Wang, Dandan Cui, Yi Du, Weichang Hao","doi":"10.1002/smtd.202401443","DOIUrl":"https://doi.org/10.1002/smtd.202401443","url":null,"abstract":"Surface engineering of BiVO4 photoanodes is effective and feasible for photoelectrochemical (PEC) water splitting. To achieve superior PEC performance, however, more than one surface engineering method is usually indispensable, for which a positive synergistic effect is vital and thus highly desired. Herein, it is reported that the incorporation of borate moieties into ultrathin p-type NiOx catalysts can induce the reconfiguration of surface catalytic sites to form new highly active species, in addition to enhanced fast charge separation and transfer. The photocurrent density of BiVO4 photoanodes is enhanced from 1.49 to 5.76 mA cm-2 at 1.23 V versus reversible hydrogen electrode (RHE) under AM 1.5G illumination, which is achieved by successive modifications of NiOx and borate moieties. It is found that BO3 groups anchored to Ni atoms by replacing the surface hydroxyl sites of NiOx catalysts not only increase the relative ratio of Ni3+ species to facilitate charge transfer but also provide efficient active sites for H2O molecule adsorption and oxidation reactions. This work demonstrates the positive synergistic effect of these two surface engineering methods and provides an effective pathway to construct highly efficient and stable photoanodes for PEC water splitting.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401443"},"PeriodicalIF":10.7,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Flexible Asymmetric Supercapacitor with High-Performance and Long-Lifetime: Fabrication of Nanoworm-Like-Structured Electrodes Based on Polypyrrole-Thiosemicarbazone Complex. 具有高性能和长寿命的柔性不对称超级电容器：基于聚吡咯-氨基硫脲复合物的纳米虫状结构电极的制备。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-30 DOI: 10.1002/smtd.202401140

Elif Avcu Altıparmak, Sibel Yazar, Tulay Bal-Demirci

{"title":"A Flexible Asymmetric Supercapacitor with High-Performance and Long-Lifetime: Fabrication of Nanoworm-Like-Structured Electrodes Based on Polypyrrole-Thiosemicarbazone Complex.","authors":"Elif Avcu Altıparmak, Sibel Yazar, Tulay Bal-Demirci","doi":"10.1002/smtd.202401140","DOIUrl":"https://doi.org/10.1002/smtd.202401140","url":null,"abstract":"A thiosemicarbazone-based iron(III) complex is prepared and used in the preparation of a supercapacitor electrode material. This electrode is produced by a solvothermal reaction of polypyrrole and the complex on carbon felt. The characterization of the complex and material is carried out using UV-vis, elemental analysis, FT-IR, XRD, BET, and TGA methods, and the surface morphology is examined using SEM technique. Because the interaction of electrode and electrolyte is of great importance in energy storage systems, as the surface area and pore volume increase, electrode ions at the electrode/electrolyte interface leak to the inner surfaces and interact with the larger surface area, which increases the charge storage performance. The electrode material, nano-worm structure, reached the highest specific capacitance value of 764.6 F g-1 at 5 mV s-1. Compared to the capacitance value of polypyrrole in its pure form, it is observed to exhibit an 187.2% increase. The highest specific capacitance value of the asymmetric supercapacitor (ASC) formed with a graphite electrode is 318.1 F g-1 at the current density of 1 Ag-1. Moreover, ASC reached a wide working potential of 1.8 V in an aqueous electrolyte and exhibited ultra-long cycle life (112%), maintaining its stability after 10 000 cycles.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401140"},"PeriodicalIF":10.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542404","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

Boosting FRET Efficiency of Chromophores with Aggregation-Caused Quenching by a Crystallization-Induced Precise Co-assembly Strategy. 通过结晶诱导的精确共组装策略提高色素团因聚集而淬灭的 FRET 效率。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-30 DOI: 10.1002/smtd.202401439

Qian Zhou, Xiaomin Zhang, Lijian Ning, Yuhui Song, Yanli Wang, Jinkun Feng, Chun-Lin Sun, Jun Li, Qiuyu Gong, Qichun Zhang, Yinjuan Huang

{"title":"Boosting FRET Efficiency of Chromophores with Aggregation-Caused Quenching by a Crystallization-Induced Precise Co-assembly Strategy.","authors":"Qian Zhou, Xiaomin Zhang, Lijian Ning, Yuhui Song, Yanli Wang, Jinkun Feng, Chun-Lin Sun, Jun Li, Qiuyu Gong, Qichun Zhang, Yinjuan Huang","doi":"10.1002/smtd.202401439","DOIUrl":"https://doi.org/10.1002/smtd.202401439","url":null,"abstract":"Förster resonance energy transfer (FRET) plays a critical role in organic optoelectronic materials. However, developing facile and effective strategies to achieve high-efficiency energy harvesting of chromophores with aggregation-caused quenching (ACQ) remains an appealing yet challenging task, that has not yet been explored. Herein, a subtly strategy, crystallization-induced precise co-assembly (CIPCA) involving a molecular \"lightening agent,\" to effectively improve FRET efficiency of ACQ chromophores is developed. Bis(phenylethynyl)anthracene (BPA) and bis(phenylethynyl)naphthacene (BPN) with significant ACQ effect are chosen as representative FRET donor and acceptor, respectively, and weakly-fluorescent octafluoronaphthalene (OFN) acted as the \"lightening agent.\" Thanks to precise co-assembly with OFN, the PLQY of solid BPA is enhanced by 107%, and the BPN powder can be unprecedentedly lighted. More importantly, through such powerful CIPCA, the monotonous and weak emission for BPA@BPN can be remarkably regulated to colorful and much brighter ones with FRET efficiency improvement of as high as 180-270%. An in-depth understanding of FRET regulation is elucidated through a precise correlation of the supramolecular structures and properties. Such achievements allow to successfully fabricate distinct multi-stimuli-responsive fluorescent patterns and highly-emissive colorful flowers with high flexibility. This research provides an efficient strategy to improve the FRET efficiency of ACQ pairs.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2401439"},"PeriodicalIF":10.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142542405","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

Inside Ceramics and Between MgO Grains: Solid-State Synthesis of Intergranular Semiconducting or Magnetic Spinels. 陶瓷内部和氧化镁晶粒之间：晶间半导体或磁性尖晶石的固态合成。

IF 10.7 2区材料科学

Small Methods Pub Date : 2024-10-29 DOI: 10.1002/smtd.202400715

Thomas Schwab, Korbinian Aicher, Gregor A Zickler, Michael Reissner, Oliver Diwald

{"title":"Inside Ceramics and Between MgO Grains: Solid-State Synthesis of Intergranular Semiconducting or Magnetic Spinels.","authors":"Thomas Schwab, Korbinian Aicher, Gregor A Zickler, Michael Reissner, Oliver Diwald","doi":"10.1002/smtd.202400715","DOIUrl":"https://doi.org/10.1002/smtd.202400715","url":null,"abstract":"Configurations of composite metal oxide nanoparticles are typically far off their thermodynamic equilibrium state. As such they represent a versatile but so far overlooked source material for the intergranular solid-state chemistry inside ceramics. Here, it is demonstrated how the admixture of Fe3+ and In3+ ions to MgO nanoparticles, as achieved by flame spray pyrolysis, can be used to engage ion exsolution, phase separation, and subsequent spinel formation inside the network of diamagnetic and insulating MgO grains. Extremely high uniformity in the distribution of intergranular ferrimagnetic MgFe2O4 films and grains with resulting magnetic coercivity values that depend on the nanoparticles' initial Fe3+ concentration is achieved. Moreover, percolating networks of semiconducting MgIn2O4 are derived from MgO nanoparticles with admixtures of 20 at% In3+ that gives rise to an enhancement of dc conductivity values by more than five orders of magnitude in comparison to the insulating MgO host. The here presented approach is general and applicable to the synthesis of a variety of functional spinel nanostructures embedded inside ceramic matrices. Nanoparticle loading with aliovalent impurity ions, the level of nanoparticle powder density after compaction, and sintering temperature are key parameters for this novel type of solid-state chemistry in between the host grains.","PeriodicalId":229,"journal":{"name":"Small Methods","volume":" ","pages":"e2400715"},"PeriodicalIF":10.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520562","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