Nanoscale Advances最新文献_第10页

Shape-controlled movement of Zn/SU-8 micromotors† Zn/SU-8 微电机的形状控制运动。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-25 DOI: 10.1039/D4NA00721B

Tijana Maric, Lasse Højlund Eklund Thamdrup and Anja Boisen

{"title":"Shape-controlled movement of Zn/SU-8 micromotors†","authors":"Tijana Maric, Lasse Højlund Eklund Thamdrup and Anja Boisen","doi":"10.1039/D4NA00721B","DOIUrl":"10.1039/D4NA00721B","url":null,"abstract":"Creating micromotors (MMs) that will have the highest possible velocities has become one of the main focuses in the field of autonomous microdevices research. The importance of velocity stems from various autonomous microdevices applications, ranging from faster drug delivery to the eradication of various bacterial biofilms using only mechanical movement. To investigate how different shapes affect the velocity of Zn/SU-8 micromotors in acid solution, we fabricated micromotors with various geometries (Zn/SU-8/Cylindrical, Zn/SU-8/Rectangular cuboid, Zn/SU-8/Triangular prism, Zn/SU-8/Pentagonal prism and Zn/SU-8/Pentagrammic prism MMs). This is the first comparative study where shape has been isolated as the critical factor influencing micromotor velocity under the same catalytic surface conditions. Our results demonstrate that Zn/SU-8/Rectangular cuboid and Zn/SU-8/Triangular prism MMs exhibit significantly higher average velocities compared to the other studied MMs. The shape-optimized Zn/SU-8 micromotors, characterized by their simple synthesis process and low cost, offer significant potential to enhance efficiency and navigation in both environmental and medical applications through precise movement control.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 24","pages":" 6134-6141"},"PeriodicalIF":4.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11587533/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142730689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Field emission performance of graphene-incorporated aluminum-based metal matrix composite† 石墨烯掺杂铝基金属基复合材料的场发射性能。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-25 DOI: 10.1039/D4NA00646A

Sunil Kumar Pradhan, Pandiyarajan K., Shubham Patil, Padmakar G. Chavan, Raphael Longuinhos Monteiro Lobato, Jenaina Ribeiro-Soares and Dattatray J. Late

{"title":"Field emission performance of graphene-incorporated aluminum-based metal matrix composite†","authors":"Sunil Kumar Pradhan, Pandiyarajan K., Shubham Patil, Padmakar G. Chavan, Raphael Longuinhos Monteiro Lobato, Jenaina Ribeiro-Soares and Dattatray J. Late","doi":"10.1039/D4NA00646A","DOIUrl":"10.1039/D4NA00646A","url":null,"abstract":"The ‘close proximity’ configuration was used for field emission analysis of graphene-incorporated aluminum (Al) composites. The turn-on field was found to be 2 V μm−1 for the AlGr1 (1% graphene (by weight) inside the Al matrix) composite compared to 4.75 V μm−1 for the pristine aluminum sample. As the potential was increased, the current due to emission expeditiously increased in an electric field of 4 V μm−1, with 1 mA cm−2 current density due to emission for the AlGr1 composite, compared to that of 1.08 μA cm−2 for Al. The turn-on value was visually perceived to be superior for the AlGr1 composite as compared to the value for Al. Also, a quite stable emission current was recorded for the AlGr1 composite as compared to Al. Furthermore, the composites maintained approximately 98.7% of the density of pure aluminum following the sintering process. The structural wholeness and the nonexistent porous quality of the sintered specimens was confirmed via X-ray micro-computed tomography (micro-CT). The thermal amalgamation of the AlGr composite materials at 640 °C was found to be adequate, and produced composites with the desired strength. These evaluations indicate that AlGr composites can be excellently applied as cathodes and for the prevention of crumpling of electrical line cables.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 2","pages":" 614-620"},"PeriodicalIF":4.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11626629/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142807027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Mn-ferrite nanoparticles as promising magnetic tags for radiofrequency inductive detection and quantification in lateral flow assays 更正：锰铁氧体纳米粒子作为有前途的磁性标签，可用于侧向流动检测中的射频感应检测和定量。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-25 DOI: 10.1039/D4NA90118E

Vanessa Pilati, María Salvador, Leyre Bei Fraile, José Luis Marqués-Fernández, Franciscarlos Gomes da Silva, Mona Fadel, Ricardo López Antón, María del Puerto Morales, José Carlos Martinez-García and Montserrat Rivas

引用次数: 0

A high stretchability fiber based on a synergistic three-dimensional conductive network for wide-range strain sensing† 一种基于协同三维导电网络的高拉伸性宽范围应变传感光纤。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-25 DOI: 10.1039/D4NA00770K

Wei Shi, Xing Yang, Langhuan Lei, Xiaozhi Huang, Jiali Lin, Qiuyu Liang, Wei Li and Jianrong Yang

{"title":"A high stretchability fiber based on a synergistic three-dimensional conductive network for wide-range strain sensing†","authors":"Wei Shi, Xing Yang, Langhuan Lei, Xiaozhi Huang, Jiali Lin, Qiuyu Liang, Wei Li and Jianrong Yang","doi":"10.1039/D4NA00770K","DOIUrl":"10.1039/D4NA00770K","url":null,"abstract":"Fiber strain sensors are promising for constructing high-performance wearable electronic devices due to their light weight, high flexibility and excellent integration. However, the conductivity of most reported fiber strain sensors is severely degraded, following deformation upon stretching, and it is still a considerable challenge to achieve both high conductivity and stretchability. Herein, we have fabricated a fiber strain sensor with high conductivity and stretchability by integrating the AgNPs into the multi-walled carbon nanotube/graphene/thermoplastic polyurethane (MWCNT/GE/TPU) fiber. The tunneling-effect dominated MWCNT/GE layer bridges separated AgNP islands, endowing conductive fibers with the integrity of conductive pathways under large strain. By means of the synergistic effect of a three-dimensional conductive network, the fiber strain sensor of AgNPs/MWCNT/GE/TPU presents not only a high conductivity of 116 S m−1, but also a wide working range of up to 600% and excellent durability (8000 stretching-releasing cycles). Remarkably, benefiting from the crack propagation on the brittle AgNP layer, the fiber strain sensor exhibits a large resistance change in the strain range of 500–600%, and thus high sensitivity with a gauge factor of 545. This fiber strain sensor can monitor human physiological signals and body movement in real-time, including pulse and joint bending, which will contribute to the development of smart textiles and next-generation wearable devices.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 2","pages":" 517-523"},"PeriodicalIF":4.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11615956/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142786175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tungsten oxide nanowire clusters anchored on porous carbon fibers as a sulfur redox mediator for lithium–sulfur batteries† 固定在多孔碳纤维上的氧化钨纳米线簇作为锂硫电池的硫氧化还原介质。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-24 DOI: 10.1039/D4NA00829D

Tongzhen Wang, Xiaofei Zhang, Jie Yang, Jiewu Cui, Jian Yan, Jiaqin Liu and Yucheng Wu

{"title":"Tungsten oxide nanowire clusters anchored on porous carbon fibers as a sulfur redox mediator for lithium–sulfur batteries†","authors":"Tongzhen Wang, Xiaofei Zhang, Jie Yang, Jiewu Cui, Jian Yan, Jiaqin Liu and Yucheng Wu","doi":"10.1039/D4NA00829D","DOIUrl":"10.1039/D4NA00829D","url":null,"abstract":"Addressing the sluggish redox kinetics of sulfur electrodes and mitigating the shuttle effect of intermediate lithium polysulfides (LiPS) are crucial for the advancement of high-energy lithium–sulfur batteries. Here, we introduce a pioneering flexible self-supporting composite scaffold that incorporates tungsten oxide nanowire clusters anchored on core–shell porous carbon fibers (WO3/PCF) for sulfur accommodation. The core of PCF serves as a robust electrode supporting scaffold, whereas the porous shell of PCF provides a 3D interconnected conductive network to accommodate sulfur, restrain polysulfide diffusion and buffer electrode expansion. The WO3 nanowire clusters not only entrap polysulfides but also function as a redox mediator to promote sulfur conversion, thus greatly mitigating the shuttle effect and boosting redox kinetics. The unique core–shell porous structure of PCF and the dual functionality of WO3 for LiPS capture and conversion contribute to the high capacity, exceptional cycling stability, and superior rate capability of the WO3/PCF/S cathode. Impressively, at a sulfur loading of 3.0 mg cm−2, it achieves an initial capacity of 1082 mA h·g−1 at 1 C with an ultralow decay rate of 0.039% over 1000 cycles. Even under a high sulfur loading of 6.1 mg cm−2, it maintains a reversible capacity of 536 mA h·g−1 after 1000 cycles with a decay rate of only 0.043% at 0.5 C.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 2","pages":" 506-516"},"PeriodicalIF":4.6,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11615955/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142786200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction of Langmuir–Blodgett films of Mn12 single molecule magnets with superconducting micro-tracks and nano-SQUIDs† Mn12单分子磁体Langmuir-Blodgett膜与超导微径和纳米squid的相互作用。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-22 DOI: 10.1039/D4NA00672K

Bibekananda Das, Tapas Senapati, Malaya K. Sahoo, Jogendra N. Behera and Kartik Senapati

{"title":"Interaction of Langmuir–Blodgett films of Mn12 single molecule magnets with superconducting micro-tracks and nano-SQUIDs†","authors":"Bibekananda Das, Tapas Senapati, Malaya K. Sahoo, Jogendra N. Behera and Kartik Senapati","doi":"10.1039/D4NA00672K","DOIUrl":"10.1039/D4NA00672K","url":null,"abstract":"Molecular magnets with large spin moments are promising spintronic materials. In this report we study the feasibility of integrating these molecules into the field of superconducting spintronics which essentially deals with the mutual interactions of magnetic and superconducting systems. In this regard we have done two separate experiments using the widely studied single molecule magnet (SMM) Mn12-ac. By performing transport measurements on thin superconducting micro-tracks of Nb coated with a Langmuir–Blodgett film of the Mn12-ac SMM, we show that the SMM film significantly enhances the vortex activation energy near the transition temperature. The SMM can, therefore, help tuning the operating conditions of superconducting transition edge sensors. In a separate experiment, a Langmuir–Blodgett film of the SMM was grown onto a superconducting Nb nano-SQUID to look for local changes in magnetization arising from the magnetization tunneling phenomenon in the SMM. We observe random jumps in the voltage across the nano-SQUID corresponding to changes in the magnetization state of the SMM near the SQUID loops, which were not observed in the nano-SQUID without the SMM. These experiments show that the large spin moment and the discrete relaxation of magnetization in molecular magnets can be utilized to generate measurable signals in superconducting spintronic devices.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 2","pages":" 467-476"},"PeriodicalIF":4.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11610604/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142770370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbon dots: synthesis, sensing mechanisms, and potential applications as promising materials for glucose sensors 碳点：合成、传感机制以及作为葡萄糖传感器的潜在应用材料。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-22 DOI: 10.1039/D4NA00763H

Kawan F. Kayani, Dlzar Ghafoor, Sewara J. Mohammed and Omer B. A. Shatery

引用次数: 0

Chemically synthesized CdSe quantum dots induce apoptosis in AGS gastric cancer cells via ROS generation 化学合成CdSe量子点通过ROS生成诱导AGS胃癌细胞凋亡。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-22 DOI: 10.1039/D4NA00795F

L. T. T. Huong, N. P. Hung, N. T. Ha, N. T. Luyen, N. T. Hien, N. X. Ca and N. T. M. Thuy

{"title":"Chemically synthesized CdSe quantum dots induce apoptosis in AGS gastric cancer cells via ROS generation","authors":"L. T. T. Huong, N. P. Hung, N. T. Ha, N. T. Luyen, N. T. Hien, N. X. Ca and N. T. M. Thuy","doi":"10.1039/D4NA00795F","DOIUrl":"10.1039/D4NA00795F","url":null,"abstract":"CdSe quantum dots (QDs) with size in the range of 3.5–5.8 nm and a zinc blende (ZB) crystal structure were synthesized by the wet chemical method. The morphology of the synthesized QDs was assessed by transmission electron microscopy (TEM). The structural and optical properties were characterized by X-ray diffraction (XRD), absorption spectroscopy (Abs) and photoluminescence (PL) spectroscopy. The anti-cancer activity of CdSe QDs was investigated on AGS gastric cancer cells through cell viability screening (MTT assay), cell cycle and apoptosis analysis using flow cytometry. The generation of reactive oxygen species (ROS) was analyzed using the cell fluorescence staining method with H2DCFDA. Three QD series of CdSe1 (3.5 nm), CdSe2 (4.7 nm) and CdSe3 (5.8 nm) have been selected to study their effects on the extermination of stomach cancer cells. The CdSe QDs all exhibited the potential to induce toxicity to cells at concentrations ranging from 5 to 20 μg mL−1. CdSe2 demonstrated a significant impact on cell proliferation compared to the CdSe1 and CdSe3 forms (p < 0.01). CdSe QDs caused cell cycle arrest, leading to the accumulation of cells in the G0/G1 phase, while also increasing the rate of apoptosis compared to the control (p < 0.01). More importantly, it has been demonstrated that CdSe QDs promote excessive production of ROS in AGS cells, which is believed to be the cause of apoptosis and the reduction of cell proliferation. These data suggest that CdSe QDs are a good candidate for combating gastric cancer cells.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 2","pages":" 572-582"},"PeriodicalIF":4.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11621947/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charge-switchable zwitterionic nanomagnets for wastewater remediation† 用于废水处理的可充电两性离子纳米磁铁。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-21 DOI: 10.1039/D4NA00730A

Sohel Reja and Sukumaran Vasudevan

{"title":"Charge-switchable zwitterionic nanomagnets for wastewater remediation†","authors":"Sohel Reja and Sukumaran Vasudevan","doi":"10.1039/D4NA00730A","DOIUrl":"10.1039/D4NA00730A","url":null,"abstract":"Enormous amounts of toxic synthetic dyes and inorganic contaminants, such as heavy metals, are regularly discharged into local water bodies unregulated and untreated through effluents from a wide range of industries. Designing industrial methodologies that limit or eliminate the unloading of harmful substances in the surrounding environment has become a requisite for sustainable growth. Although the magnetic separation-based adsorption technique seems quite promising, the functional moieties on the nanoparticle surface often restrict the choice of target pollutants, limiting their universal applicability. Here, we explore the utility of a zwitterion-coated magnetic adsorbent for the easy separation of both positively and negatively charged contaminants from water. Water-dispersible monodispersed nitrilotriacetic acid-functionalized superparamagnetic iron oxide nanoparticles (NTA@SPIONs) were prepared on a large scale following a simple one-pot route. The zwitterionic nanoparticles exhibit surface charge reversibility with a change in pH. The charge-switching property of the nanomaterial was exploited for the removal of cationic and anionic contaminants, such as dyes and heavy metal ions. By proper tuning of the medium pH, methylene blue (MB), a cationic dye, and Congo red (CR), a benzidine-based anionic azo dye, were separated from the aqueous dispersion with the help of the NTA@SPIONs. Under the same working principle, chromium, a highly toxic heavy metal both in cationic and anionic form, was successfully separated from the contaminated water. Low-gradient magnetic separation makes the process rapid, easy, and efficient, and also avoids the chances of secondary pollution.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 1","pages":" 329-335"},"PeriodicalIF":4.6,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11605701/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142770339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and applications of luminescent metal organic frameworks (MOFs) for sensing dipicolinic acid in biological and water samples: a review 用于传感生物和水样中二砒啶酸的发光金属有机框架 (MOF) 的合成与应用：综述。

IF 4.6 3区材料科学

Nanoscale Advances Pub Date : 2024-11-21 DOI: 10.1039/D4NA00652F

Kawan F. Kayani, Omer B. A. Shatery, Sewara J. Mohammed, Harez Rashid Ahmed, Rebaz F. Hamarawf and Muhammad S. Mustafa

{"title":"Synthesis and applications of luminescent metal organic frameworks (MOFs) for sensing dipicolinic acid in biological and water samples: a review","authors":"Kawan F. Kayani, Omer B. A. Shatery, Sewara J. Mohammed, Harez Rashid Ahmed, Rebaz F. Hamarawf and Muhammad S. Mustafa","doi":"10.1039/D4NA00652F","DOIUrl":"10.1039/D4NA00652F","url":null,"abstract":"The detection of trace quantities of 2,6-dipicolinic acid (DPA) in real-world samples is crucial for early disease diagnosis and routine health monitoring. Metal–organic frameworks (MOFs), recognized for their diverse structural architectures, have emerged as advanced multifunctional hybrid materials. One of the most notable properties of MOFs is their luminescence (L), which can arise from structural ligands, guest molecules, and emissive metal ions. Luminescent MOFs have shown significant promise as platforms for sensor design. This review highlights the application of luminescent MOFs in the detection of DPA in biological and aqueous environments. It provides a comprehensive discussion of the various detection strategies employed in luminescent MOF-based DPA sensors. Additionally, it explores the origins of L in MOFs, their synthesis, and the mechanisms underlying their sensing capabilities. The article also addresses key challenges and limitations in this field, offering practical insights for the development of efficient luminescent MOFs for DPA detection.","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 1","pages":" 13-41"},"PeriodicalIF":4.6,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11579904/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142710444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0