Nanomaterials最新文献_第9页

A General Solution to the Continuum Rate Equation for Island-Size Distributions: Epitaxial Growth Kinetics and Scaling Analysis.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-04 DOI: 10.3390/nano15050396

Vladimir G Dubrovskii

{"title":"A General Solution to the Continuum Rate Equation for Island-Size Distributions: Epitaxial Growth Kinetics and Scaling Analysis.","authors":"Vladimir G Dubrovskii","doi":"10.3390/nano15050396","DOIUrl":"10.3390/nano15050396","url":null,"abstract":"The nucleation and growth of surface islands in the pre-coalescence stage has previously been studied by different methods, including the rate equation approach and kinetic Monte Carlo simulations. However, full understanding of island growth kinetics and the scaling properties of their size distributions is still lacking. Here, we investigate rate equations for the irreversible homogeneous growth of islands in the continuum limit, and derive a general island-size distribution whose shape is fully determined by the dynamics of the monomer concentration at a given size dependence of the capture coefficients. We show that the island-size distribution acquires the Family-Viscek scaling shape in the large time limit if the capture coefficients are linear in size for large enough islands. We obtain analytic solutions for the time-dependent monomer concentration, island density, average size and island-size distribution, which are valid for all times, and the analytic scaling function in the large time limit. These results can be used for modeling growth kinetics in a wide range of systems and shed more light on the general properties of the size distributions of different nano-objects.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901985/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605760","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

Biological Effects of Micro-/Nano-Plastics in Macrophages.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-04 DOI: 10.3390/nano15050394

Massimiliano G Bianchi, Lavinia Casati, Giulia Sauro, Giuseppe Taurino, Erika Griffini, Christian Milani, Marco Ventura, Ovidio Bussolati, Martina Chiu

{"title":"Biological Effects of Micro-/Nano-Plastics in Macrophages.","authors":"Massimiliano G Bianchi, Lavinia Casati, Giulia Sauro, Giuseppe Taurino, Erika Griffini, Christian Milani, Marco Ventura, Ovidio Bussolati, Martina Chiu","doi":"10.3390/nano15050394","DOIUrl":"10.3390/nano15050394","url":null,"abstract":"The environmental impact of plastics is worsened by their inadequate end-of-life disposal, leading to the ubiquitous presence of micro- (MPs) and nanosized (NPs) plastic particles. MPs and NPs are thus widely present in water and air and inevitably enter the food chain, with inhalation and ingestion as the main exposure routes for humans. Many recent studies have demonstrated that MPs and NPs gain access to several body compartments, where they are taken up by cells, increase the production of reactive oxygen species, and lead to inflammatory changes. In most tissues, resident macrophages engage in the first approach to foreign materials, and this interaction largely affects the subsequent fate of the material and the possible pathological outcomes. On the other hand, macrophages are the main organizers and controllers of both inflammatory responses and tissue repair. Here, we aim to summarize the available information on the interaction of macrophages with MPs and NPs. Particular attention will be devoted to the consequences of this interaction on macrophage viability and functions, as well as to possible implications in pathology.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901536/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605343","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

Inverse Design of Multi-Port Power Splitter with Arbitrary Ratio Based on Shape Optimization.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-04 DOI: 10.3390/nano15050393

Yang Liu, Zhe Kang, Haoda Xu, Guangbiao Zhong, Ruitao Zhang, Chaoying Fu, Ye Tian

引用次数: 0

Charging and Aggregation of Nano-Clay Na-Montmorillonite in the Presence of Ciprofloxacin.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-03 DOI: 10.3390/nano15050389

Chuanzi Zeng, Motoyoshi Kobayashi

{"title":"Charging and Aggregation of Nano-Clay Na-Montmorillonite in the Presence of Ciprofloxacin.","authors":"Chuanzi Zeng, Motoyoshi Kobayashi","doi":"10.3390/nano15050389","DOIUrl":"10.3390/nano15050389","url":null,"abstract":"The transport and fate of antibiotics are significantly influenced by co-existing colloidal and nanosized substances, such as clay particles. Montmorillonite, a common clay mineral with a thin nano-sheet-like structure, enhances antibiotic (e.g., ciprofloxacin) mobility due to its strong adsorption properties. Nevertheless, little is known about how ciprofloxacin systematically influences the charging and aggregation properties of montmorillonite. This study examines the effect of ciprofloxacin on the electrophoretic mobility and hydrodynamic diameter of Na-montmorillonite under varying pH levels and NaCl concentrations. Results show ciprofloxacin promotes aggregation and alters the surface net charge of Na-montmorillonite at acidic to neutral pH, where ciprofloxacin is positively charged. At higher pH levels, where ciprofloxacin is negatively charged, no significant effects are observed. The observed aggregation behaviors align with predictions based on the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. Specifically, the slow aggregation regime, the fast aggregation regime, and the critical coagulation concentration are identified. The relationship between critical coagulation ionic strength and electrokinetic surface charge density is well explained by the DLVO theory with the Debye-Hückel approximations. Additionally, non-DLVO interactions are inferred. At low NaCl and ciprofloxacin concentrations, minimal changes in aggregation and surface charge suggest dispersed montmorillonite may facilitate ciprofloxacin transport, raising environmental concerns.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901612/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605417","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

Nanofertilizers for Sustainable African Agriculture: A Global Review of Agronomic Efficiency and Environmental Sustainability.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-03 DOI: 10.3390/nano15050390

Queen Khundi, Yaqi Jiang, Yi Sun, Yukui Rui

{"title":"Nanofertilizers for Sustainable African Agriculture: A Global Review of Agronomic Efficiency and Environmental Sustainability.","authors":"Queen Khundi, Yaqi Jiang, Yi Sun, Yukui Rui","doi":"10.3390/nano15050390","DOIUrl":"10.3390/nano15050390","url":null,"abstract":"As Africa's population continues to grow, the need for sustainable agricultural practices has intensified, sparking greater interest in nanofertilizers This review critically evaluates the agronomic efficiency and environmental sustainability of nanofertilizers in the African context. It combines existing research on nanofertilizers' effectiveness, nutrient-use efficiency, and environmental impact. Nanofertilizers have shown a nutrient-use efficiency boost of up to 30% compared to conventional fertilizers. This review also highlights benefits such as enhanced crop yields (up to 25% increase in maize production), reduced chemical fertilizer requirements (up to 40% reduction in nitrogen application), and improved soil health. The analysis informs policy, research, and practice aimed at optimizing nanofertilizer deployment for sustainable African agriculture. The projected global population of 2.4 billion by 2050 highlights that the need for sustainable agricultural solutions has never been more important. Our review conveys an assessment of nanofertilizers' potential contribution to Africa's agricultural sustainability and food security.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901558/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605331","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

Curcumin-Functionalized Electrospun Nanofibrous Membranes with Antimicrobial Activity for Wound Healing. 具有伤口愈合抗菌活性的姜黄素功能化电纺纳米纤维膜

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-03 DOI: 10.3390/nano15050388

Neraida Petrai, Konstantinos Loukelis, Maria Chatzinikolaidou

{"title":"Curcumin-Functionalized Electrospun Nanofibrous Membranes with Antimicrobial Activity for Wound Healing.","authors":"Neraida Petrai, Konstantinos Loukelis, Maria Chatzinikolaidou","doi":"10.3390/nano15050388","DOIUrl":"10.3390/nano15050388","url":null,"abstract":"Chronic or improperly healed wounds, either as a result of extended trauma or prolonged inflammatory response, affect a significant percentage of the world population. Hence, there is a growing interest in the development of biomimetic scaffolds that expedite wound closure at the early stages. Curcumin (Cur) is a plant-derived polyphenol with antimicrobial activity, and it accelerates the wound contraction rate. Recently, electrospraying has emerged for the precise deposition of bioactive molecules into scaffolds to improve therapeutic outcomes. In this study, we produced membranes for wound healing and endowed them with antibacterial properties to promote the healing of impaired wounds. Unlike previous studies that incorporated curcumin directly into electrospun fibers, we employed electrospraying to coat curcumin onto PVA/KC membranes. This approach improves the curcumin bioavailability and release kinetics, ensuring sustained therapeutic action. Toward this end, we fabricated four types of membranes, poly(vinyl alcohol) PVA and PVA/kappa carrageenan (KC), using electrospinning, and PVA/KC/Cur5 and PVA/KC/Cur20, in which the PVA/KC membranes were coated with two different concentrations of Cur by electrospraying. All membranes showed low cytotoxicity, good cell adhesion, the capability of enabling cells to produce collagen, and an adequate degradation rate for wound-healing applications. Antibacterial evaluation showed that both Cur-loaded membranes increased the antibacterial efficacy against both Escherichia coli and Staphylococcus aureus compared with PVA and PVA/KC membranes. These findings highlight the potential of electrosprayed curcumin as an effective strategy for bioactive wound dressings.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901771/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605471","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

Stretchable, Patterned Carbon Nanotube Array Enhanced by Ti₃C₂T_x/Graphene for Electromagnetic Interference Shielding.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-03 DOI: 10.3390/nano15050391

Baohua Li, Xuebin Liu, Jiyong Feng, Yunfan Wang, Junhua Huang, Zhengwei Fu, Zhiping Zeng, Jianghui Zheng, Xuchun Gui

{"title":"Stretchable, Patterned Carbon Nanotube Array Enhanced by Ti3C2Tx/Graphene for Electromagnetic Interference Shielding.","authors":"Baohua Li, Xuebin Liu, Jiyong Feng, Yunfan Wang, Junhua Huang, Zhengwei Fu, Zhiping Zeng, Jianghui Zheng, Xuchun Gui","doi":"10.3390/nano15050391","DOIUrl":"10.3390/nano15050391","url":null,"abstract":"Stretchability and flexibility are essential characteristics for high-performance electromagnetic interference (EMI) shielding materials in wearable and smart devices. However, achieving these mechanical properties while also maintaining high EMI shielding effectiveness (SE) for shielding materials remains a significant challenge. Here, a stretchable patterned carbon nanotube (CNT) array composite film, reinforced with two-dimensional (2D) nanomaterials (Ti3C2Tx and graphene), is fabricated using a straightforward scraping method. The resulting CNT array/Ti3C2Tx/graphene composite films possess a periodic grid structure. Specifically, the composite film with a regular hexagonal pattern demonstrates an EMI SE of 36.5 dB in the X-band at a thickness of 350 μm. Additionally, the composite film exhibits excellent stretchability, flexibility, and stability. After undergoing 10,000 stretching cycles, the EMI SE remains stable. Simulation results further indicate that surface reflection is the primary EMI shielding mechanism. This simple scraping method offers a promising approach for developing stretchable and high-performance EMI shielding films, making them well suited for application in flexible devices.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11902016/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605812","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

Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-02 DOI: 10.3390/nano15050387

Zijun Dong, Tong Li, Xinghe Xu, Yi Chen, Jiemei Fu, Shichang Sun

{"title":"Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors.","authors":"Zijun Dong, Tong Li, Xinghe Xu, Yi Chen, Jiemei Fu, Shichang Sun","doi":"10.3390/nano15050387","DOIUrl":"10.3390/nano15050387","url":null,"abstract":"Preparing carbon aerogel in an eco-friendly and inexpensive manner remains a significant challenge. The carbon aerogels derived from food waste (FWCAs) with a three-dimensional connected network structure are successfully synthesized using microwave radiation. The as-prepared FWCA-4 (The KOH/C ratio is 4) has a large specific surface area (1470 m2/g), pore volume (0.634 m3/g), and a high degree of graphitization. Band-like lattice stripes with a spacing of 0.34 nm, corresponding to the graphite plane, are observed. A high specific capacitance of 314 F/g at 1.0 A/g and an excellent capacitance retention (>90% after 10,000 cycles) make the FWCA-4 suitable for high-performance supercapacitor electrode materials. Furthermore, the specific surface area and pore volume of FWCA-4 are larger and the degree of graphitization is higher than in ordinary porous carbon derived from food waste (FWPC). The assembled symmetrical solid capacitor from FWCA-4 exhibits a maximum energy density of approximately 179.9 W/kg in neutral ion electrolytes. Thus, food waste is successfully used to prepare carbon aerogels through a gelation process using microwave radiation. The recycling of waste biomass is achieved, and the results provide insights for the preparation of carbon aerogels using biomass.","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 5","pages":""},"PeriodicalIF":4.4,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11901680/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143605738","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

A Novel Gully-like Surface of Stainless-Steel Fiber Coated with COF-TPB-DMTP Nanoparticles for Solid-Phase Microextraction of Phthalic Acid Esters in Bottled Tea Beverages.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-02 DOI: 10.3390/nano15050385

Yuanyuan Yuan, Baohui Li, Keqing Zhang, Hongtao Zhu

引用次数: 0

Strategies for Improving Contact-Electro-Catalytic Efficiency: A Review.

IF 4.4 3区材料科学

Nanomaterials Pub Date : 2025-03-02 DOI: 10.3390/nano15050386

Meng-Nan Liu, Jin-Hua Liu, Lu-Yao Wang, Fang Yin, Gang Zheng, Ru Li, Jun Zhang, Yun-Ze Long

引用次数: 0