Journal of nanoscience and nanotechnology最新文献_第8页

Methyl Orange Adsorption onto Magnetic Fe₃O₄/Carbon (AC, GO, PGO) Nanocomposites. 甲基橙在磁性Fe₃O₄/碳(AC, GO, PGO)纳米复合材料上的吸附

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19494

Glemarie C Hermosa, Chien-Shiun Liao, Sea-Fue Wang, Aidan An-Cheng Sun

{"title":"Methyl Orange Adsorption onto Magnetic Fe₃O₄/Carbon (AC, GO, PGO) Nanocomposites.","authors":"Glemarie C Hermosa, Chien-Shiun Liao, Sea-Fue Wang, Aidan An-Cheng Sun","doi":"10.1166/jnn.2021.19494","DOIUrl":"https://doi.org/10.1166/jnn.2021.19494","url":null,"abstract":"In this study, carbonaceous nanomaterials (Activated Carbon (AC), Graphene Oxide (GO) and Porous Graphene Oxide (PGO)) were synthesized and attached to Fe₃O₄ magnetic powder for the effective removal of synthetic Methyl Orange (MO). AC and GO were successfully conjugated with Fe₃O₄ whilst PGO was not due to its surface functional groups. The morphology and chemical structure of the Fe₃O₄/Carbon nanocomposites were characterized by the N₂ adsorption, Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (TEM) and Vibrating sample magnetometer (VSM). Batch adsorption experiments were performed and showed significant removal efficiency of 90% at the first ten minutes for Fe₃O₄/AC nanocomposite. Analysis of adsorption equilibrium revealed that AC/Fe₃O₄ is well fitted with Langmuir model, a homogeneous adsorption having an adsorption capacity of 270 mg/g. The GO/Fe₃O₄ can fit with both Langmuir and Freundlich models indicating multilayer adsorption on the surface of the adsorbent with an adsorption capacity of 81.9 mg/g. In the case of adsorption kinetics, both adsorbents follow the pseudo second order kinetics model showing high F?² values. Both adsorbents demonstrated advantageous superparamagnetic properties for their easy recovery from aqueous solutions and prospective applications to toxic removal in water and wastewater.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5756-5764"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38973735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Sensitive Near-Infrared Refractive Index Sensors Based on D-Shaped Photonic Crystal Fibers. 基于d型光子晶体光纤的近红外折射率敏感传感器。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19469

Thu Trang Hoang, Van Dai Pham, Thanh Son Pham, Khai Q Le, Quang Minh Ngo

{"title":"Sensitive Near-Infrared Refractive Index Sensors Based on D-Shaped Photonic Crystal Fibers.","authors":"Thu Trang Hoang, Van Dai Pham, Thanh Son Pham, Khai Q Le, Quang Minh Ngo","doi":"10.1166/jnn.2021.19469","DOIUrl":"https://doi.org/10.1166/jnn.2021.19469","url":null,"abstract":"We report a numerical study of D-shaped photonic crystal fiber based plasmonic refractive index sensor with high resolution and sensitivity in the near-infrared region. D-shaped photonic crystal fiber is formed by side polishing one part of photonic crystal fiber. It has a polishing surface where plasmonic gold layer is coated to modulate the resonant wavelength and enhance the refractive index sensitivity. Several D-shaped photonic crystal fiber plasmonic sensors with various distances from the photonic crystal fiber's core to the polishing surface and gold thicknesses are designed and their characteristics are analyzed by the finite element method. The simulation results indicate that distance from the photonic crystal fiber's core to the polishing surface causes modifications in the loss intensity, the resonant wavelength, and the refractive index sensitivity of D-shaped photonic crystal fiber plasmonic sensor. Mass production of refractive index sensors were achieved using a simple fabrication process, whereby the D-shaped photonic crystal fiber is grinded where distance from the photonic crystal fiber's core to the polishing surface is less than one layer thickness and then coated with the gold layer. For the refractive index sensing applications, the maxima theoretical resolution and sensitivity of D-shaped photonic crystal fiber plasmonic sensor reach 2.98 × 10 6refractive index unit and 6,140 nm/refractive index unit in range of 1.30-1.37, respectively. We also report an initial fabrication of the D-shaped photonic crystal fiber following the standard stack-and- draw method to demonstrate the feasibility of the proposed device by using our in-house equipments. The proposed D-shaped photonic crystal fiber plasmonic sensor design in this work would be useful for the development of cheap refractive index sensors with high sensitivity and resolution.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5535-5541"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38974942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Molten Salt Synthesized MgNiO₂ Micro/Nano-Particles for High Energy Density Supercapacitor and Electrocatalyst for Hydrogen Evolution Reaction in Alkaline Medium. 熔盐合成MgNiO 2微/纳米粒子用于高能量密度超级电容器和碱性介质析氢反应电催化剂。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19457

S Maitra, R Mitra, T K Nath

{"title":"Molten Salt Synthesized MgNiO₂ Micro/Nano-Particles for High Energy Density Supercapacitor and Electrocatalyst for Hydrogen Evolution Reaction in Alkaline Medium.","authors":"S Maitra, R Mitra, T K Nath","doi":"10.1166/jnn.2021.19457","DOIUrl":"https://doi.org/10.1166/jnn.2021.19457","url":null,"abstract":"In recent years, solid solutions have shown promising results as functional materials for different applications. These materials have tunable physiochemical properties and electronic properties, and are being intensively studied for next generation electrochemical charge storage as well as noble metal free low cost electrocatalyts. In the present work, Magnesium Nickel Oxide (MgNiO₂) solid solution is prepared by molten salt synthesis. MgNiO₂ particles having octahedron shaped morphology with size of 550 nm with an agglomerative behavior was observed through morphological studies. Raman studies revealed presence of three two-phonon modes as well as two one-phonon modes, which confirm the phase purity of MgNiO₂ sample. MgNiO₂ particles behaved as a promising supercapacitor candidate by exhibiting a large specific capacitance of 76 F/g. It also revealed electrochemical stability over an expansive potential range under the presence of 0.5 mol L-1Sodium Sulfate (Na₂SO₄) electrolyte, having a high energy density of nearly 51 Wh/kg with a power density of nearly 825 w/kg. Further, MgNiO₂ particle showed improved electrocatalytic potential towards Hydrogen Evolution Reaction (HER) in 1 mol L-1 Potassium Hydroxide (KOH) alkaline medium, by demonstrating an overpotential of 0.636 V with a Tafel slope of 0.22205 v/dec. Based on these observed promising results, it can be conclusively inferred that MgNiO₂ solid solution is a potential candidate for environmental friendly high voltage supercapacitor and HER electrocatalyst applications.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5556-5568"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38974944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review of the Antimicrobial Activity of Selenium Nanoparticles. 纳米硒抗菌活性研究进展

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19471

Fernando Martínez-Esquivias, Juan Manuel Guzmán-Flores, Alejandro Pérez-Larios, Napoleón González Silva, Julieta Saraí Becerra-Ruiz

引用次数: 9

A Simple and Low-Cost Method for Fabrication of Polydimethylsiloxane Microfludic Chips. 一种简单、低成本制备聚二甲基硅氧烷微流控芯片的方法。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19464

Linlin Sun, Likang Zhang, Xue Yang, Biyao Zhang, Zhifu Yin

引用次数: 0

Effect of Structural Deficiencies on Bi-Ferroic Behaviors of Lead-Free Bi_0.5 Na_0.40K_0.10TiO₃ Films. 结构缺陷对无铅Bi0.5 Na0.40K0.10TiO₃薄膜双铁行为的影响

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19477

Ngo Due Quan, Nguyen Due Minh, Hoang Viet Hung

{"title":"Effect of Structural Deficiencies on Bi-Ferroic Behaviors of Lead-Free Bi0.5 Na0.40K0.10TiO₃ Films.","authors":"Ngo Due Quan, Nguyen Due Minh, Hoang Viet Hung","doi":"10.1166/jnn.2021.19477","DOIUrl":"https://doi.org/10.1166/jnn.2021.19477","url":null,"abstract":"Lead-free Bi0.5Na0.4K0.1TiO₃ (BNKT) ferroelectric films on Pt/TI/SIO₂/Si substrates were prepared via a sol-gel spin coating routine. The microstructures and multiferroic behaviors of the films were examined intimately as a function of the annealing time. A rise of annealing time enhanced the crystallization of the films via the perovskite structure. The multiferroic behavior, including simultaneously the magnetic and ferroelectric orders, was observed altogether the films. When the annealing time rose, ferroelectric and magnetic properties were found significantly increased. The remnant polarization (Pr), also as maximum polarization (Pm) respectively increased to the very best values of 11.5 µC/cm² and 40.0 µC/cm² under an applied electric field of 500 kV/cm. The saturated magnetization (Ms) of films increased to 2.3 emu/cm³ for the annealing time of 60 minutes. Oxygen vacancies, originating from the evaporation of metal ions during annealing at high temperatures are attributed to the explanation for ferromagnetism within the BNKT films.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5653-5658"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38893160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Initial Dynamic Susceptibility of Maghemite Nanoparticles Dispersed in Surface-Treated Polymeric Template. 磁赤铁矿纳米颗粒分散在表面处理聚合物模板中的初始动态磁化率。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19484

A F R Rodriguez, R F Lacerda, L E Maggi, Hory Mohammadpour, Mohammad Niyaifar, Shahrokh Niyaifar, Judes G Santos, M A Morales

引用次数: 0

Characteristics of Thermosensitive and Targeted F127-Triethoxysilane/Gold Nanorod Combined with Photothermal Therapy in Tumor Model Mice. 热敏性和靶向性f127 -三乙氧基硅烷/金纳米棒联合光热治疗肿瘤模型小鼠的特性

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19485

Chien-Chung Hsia, Po-Jung Chen, Mao-Chien Weng, Mei-Hui Wang

{"title":"Characteristics of Thermosensitive and Targeted F127-Triethoxysilane/Gold Nanorod Combined with Photothermal Therapy in Tumor Model Mice.","authors":"Chien-Chung Hsia, Po-Jung Chen, Mao-Chien Weng, Mei-Hui Wang","doi":"10.1166/jnn.2021.19485","DOIUrl":"https://doi.org/10.1166/jnn.2021.19485","url":null,"abstract":"Even with all the recent technological improvements, cancer remains to be the disease with the highest impact on global health. Due to obviously disadvantages or limitations on traditional therapy, researchers are engaged to search for safely and effective methods in cancers' therapy. Photothermal therapy (PTT) has been employed in treating cancers and several of other diseases. In this study, novel thermosensitive and targeting nanoparticle, C225-silane-F127/gold nanorod (C-SFGR) combined with PTT was investigated in EGFR-overexpressing xenografts mice model. For better light to heat transformation exposed with 808 nm near-infrared (NIR) laser, the diameter of thermosensitive C-SFGR was designed at about 120 nm. To address the biocompatibility, the viability of A549 cell line was greater than 80% under high concentrations of C-SFGR (1,000 μg/mL), indicating its low cytotoxicity. After intravenous injection of C-SFGR and combined with NIR treatment for 2 min in A549 bearing mice, tumors were almost completely shriveled after 2 weeks. For developing as theranostic agent, C-SFGR was then labeled with 67Ga, with radiochemical purity over 98%. These present results suggest that C-SFGR could be also applied as a SPECT-imaging agent and as an effective antitumor agent.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5688-5693"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38905203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Separation of Rare-Earth Ions from Mine Wastewater Using B₁₂S Nanoflakes as a Capacitive Deionization Electrode Material. B12S纳米片作为电容去离子电极材料分离矿山废水中的稀土离子。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19466

Huan Dong Xiang, Peng Liu, Miao Deng, Dong Ge Tong

{"title":"Separation of Rare-Earth Ions from Mine Wastewater Using B12S Nanoflakes as a Capacitive Deionization Electrode Material.","authors":"Huan Dong Xiang, Peng Liu, Miao Deng, Dong Ge Tong","doi":"10.1166/jnn.2021.19466","DOIUrl":"https://doi.org/10.1166/jnn.2021.19466","url":null,"abstract":"In this study, nanoflakes of B12S were fabricated by plasma-assisted reaction of sulfur dichloride in an ionic liquid at room temperature using europium boride as a hard template. The nanoflakes had an average width and thickness of about 3 1urn and 9.6 nm, respectively, and a large specific surface area of 1197.2 m² g 1. They behaved like typical electric double-layer capacitors with a capacitance of 201.2 F g 1 at 0.2 mA cm ² During capacitive deionization to recover rare-earth ions, the nanoflakes had higher adsorption selectivity for Sm3+ than for other competing ions present in real mine waste water. This is due to the strong interaction of the electron-concentered S-groups (S''') of the nanoflakes with S m3+. This provides an alternative to construct efficient systems to specifically remove Sm3+ from aqueous solution using B12S nanoflakes. This process demonstrates that other boron sulfide compounds can be used to recover valuable ions by capacitive deionization.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5459-5476"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38975548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Copper Modified Titania Nanocomposites with a High Photocatalytic Inactivation of Escherichia coli. 铜修饰二氧化钛纳米复合材料对大肠杆菌的高光催化失活性能。

Journal of nanoscience and nanotechnology Pub Date : 2021-11-01 DOI: 10.1166/jnn.2021.19463

Huang Zhou, Feng-Jiao He

{"title":"Copper Modified Titania Nanocomposites with a High Photocatalytic Inactivation of Escherichia coli.","authors":"Huang Zhou, Feng-Jiao He","doi":"10.1166/jnn.2021.19463","DOIUrl":"https://doi.org/10.1166/jnn.2021.19463","url":null,"abstract":"As everyone knows, bacterial infectious diseases are serious hazards to human health in the world. Despite performing many methods towards the bacterial pollution, containing many detection and sterilization techniques, there is still a lack of effective means. Herein, a novel copper modified titanium (Cu@TiO₂) nanocomposites were resoundingly synthesized via the well-known sol-gel process, which revealed a significant antibacterial activity under the illumination of sunlight. The XRD, Raman spectroscopy and TEM images showed that the Cu@TiO₂ nanocomposites with a globular shape are anatase phase, Moreover, low temperature physical adsorption test and UV- visible spectrum indicate Cu0.01 @TiO₂ owns a supernal specific area (80 m²/g) and the high visible light absorbing ability. Furthermore, the novel Cu@TiO₂ nanocomposites showed an unprecedented photocatalytic capacity towards Escherichia Coli (E. coli) bacteria. In vitro, Cu@TiO₂ nanocomposites can kill almost 98.7% E. coli under 60 min simulated solar light irradiation than that of TiO ₂(31.3 %). This study suggests that the Cu@TiO₂ will be as a potential material for ameliorating antibiotic-resistant bacteria in food detection.","PeriodicalId":16417,"journal":{"name":"Journal of nanoscience and nanotechnology","volume":"21 11","pages":"5486-5492"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38975550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1