Nano Hybrids and Composites最新文献_第9页

Far Infrared Laser Detector Based on Multi-Walled Carbon Nanotubes and Blend of (Polyaniline - Polymethyl Methacrylate) Polymers with Methyl Blue Dye for Photoconductive Applications 基于多壁碳纳米管和(聚苯胺-聚甲基丙烯酸甲酯)聚合物与甲基蓝染料共混物的光导远红外激光探测器

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Nano Hybrids and Composites Pub Date : 2021-10-11 DOI: 10.4028/www.scientific.net/NHC.33.93

W. R. Saleh, S. Hassan, S. Y. Al-Dabagh, M. Marwa

{"title":"Far Infrared Laser Detector Based on Multi-Walled Carbon Nanotubes and Blend of (Polyaniline - Polymethyl Methacrylate) Polymers with Methyl Blue Dye for Photoconductive Applications","authors":"W. R. Saleh, S. Hassan, S. Y. Al-Dabagh, M. Marwa","doi":"10.4028/www.scientific.net/NHC.33.93","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.33.93","url":null,"abstract":"Infrared photoconductive detectors working in the far-infrared region and room temperature were fabricated. The detectors were fabricated using three types of carbon nanotubes (CNTs); MWCNTs, COOH-MWCNTs, and short-MWCNTs. The carbon nontubes suspension is deposited by dip coating and drop–casting techniques to prepare thin films of CNTs. These films were deposited on porous silicon (PSi) substrates of n-type Si. The I-V characteristics and the figures of merit of the fabricated detectors were measured at a forward bias voltage of 3 and 5 volts as well as at dark and under illumination by IR radiation from a CO2 laser of 10.6 μm wavelengths and power of 2.2 W. The responsivity and figures of merit of the photoconductive detector are improved by coating the MWCNTs films with a thin layer of a blend (polyaniline - polymethyl methacrylate) polymer with methylene blue dye. The coated MWCNTs films showed better performances, so this type of coating can be considered as a surface treatment of the detector film, which highly increased the responsivity and specific detectivity of the fabricated IR laser detector-based MWCNTs. The photocurrent response for the coated films was increased about 25 times than that for uncoated films. The results proved the role of the polymer in the enhancement of the performance of the IR photoconductive detectors. Keywords: Carbon nanotubes, Infrared detector, Polyaniline polymer, Polymethyl methacrylate polymer, Methyl Blue dye.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"29 1","pages":"93 - 103"},"PeriodicalIF":0.4,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80406622","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

Liquid-Phase Exfoliation of Graphene in Organic Solvents with Addition of Picric Acid 添加苦味酸的有机溶剂中石墨烯的液相剥离

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Nano Hybrids and Composites Pub Date : 2021-10-11 DOI: 10.4028/www.scientific.net/NHC.33.47

S. A. Shah, H. Nasir, S. Honey

{"title":"Liquid-Phase Exfoliation of Graphene in Organic Solvents with Addition of Picric Acid","authors":"S. A. Shah, H. Nasir, S. Honey","doi":"10.4028/www.scientific.net/NHC.33.47","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.33.47","url":null,"abstract":"In this work, graphene was produced by liquid-phase exfoliation of graphite in different organic solvents with addition of picric acid. The graphene was easily produced by one step ultra-sonication of graphite powder in the organic solvents. The addition of picric acid has increased the graphene production yield in most of the solvents tested in this work. Picric acid serves as a “molecular wedge” to intercalate into the edge of graphite, which plays a key role during sonication and significantly improves the production yield of graphene. The products were analyzed by microscopic techniques, including atomic force microscopy (AFM) and scanning electron microscope (SEM). The AFM images indicate that the exfoliation efficiency and amount of graphene increased by addition of picric acid in organic solvents. Moreover, the AFM images also indicate presence of bilayer graphene. SEM analysis also shows that the addition of picric acid into the organic solvent favors the exfoliation process. The produced graphene was also analyzed by XRD, FTIR, Raman and UV-visible spectroscopy. The XRD results illustrate that exfoliation was best achieved in N-methyl-2-pyrrolidone (NMP) as a solvent. FTIR and Raman results indicate that addition of picric acid has slightly defected the produced graphene surface. The amount of graphene concentration was calculated by using Beer Lambert law, and it was observed that the graphene production yield was increased by using picric acid in most of the solvents. The maximum amount of graphene concentration (0.159 mg/ml) was achieved by adding 30 mg of picric acid in NMP.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"37 1","pages":"47 - 60"},"PeriodicalIF":0.4,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90788307","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

Nonlinear Vibration and Stability Analysis of Functionally Graded Nanobeam Subjected to External Parametric Excitation and Thermal Load 外部参数激励和热载荷作用下功能梯度纳米梁的非线性振动与稳定性分析

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Nano Hybrids and Composites Pub Date : 2021-10-11 DOI: 10.4028/www.scientific.net/NHC.33.105

Fateme Shayestenia, Mohadese Janmohammadi, S. Sadatsakkak, M. Ghadiri

{"title":"Nonlinear Vibration and Stability Analysis of Functionally Graded Nanobeam Subjected to External Parametric Excitation and Thermal Load","authors":"Fateme Shayestenia, Mohadese Janmohammadi, S. Sadatsakkak, M. Ghadiri","doi":"10.4028/www.scientific.net/NHC.33.105","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.33.105","url":null,"abstract":"Analysis of vibration stability of simply supported Euler-Bernoulli functionally graded (FG) nanobeam embedded in viscous elastic medium with thermal effect under external parametric excitation is presented in this work. An attempt has been made for the first time is investigating the effect of thermal load on dynamic behavior, amplitude response, instability region and bifurcation points of functionally graded nanobeam. Thermal loads are supposed to be uniform, linear or nonlinear distribution along the thickness direction. Nonlocal continuum theory and the principle of the minimum total potential energy are applied to derive the governing equations. The partial differential equations (PDE) are transported to the ordinary differential equations (ODE) by using the Petrov-Galerkin method and the multiple time scales method are manipulated to solve the motion equation. To study the effect of external parametric excitation and thermal effect, different temperature distributions along the thickness such as uniform, linear, and nonlinear distribution are considered. Moreover, stable and unstable regions and bifurcation points are determined. It is obtained that the thermal load can affect the amplitude response of FG nanobeam. Also, it is observed that the instability of the system is affected by the detuning parameter and the parametric excitation amplitude plays great role in the instability of system. Nanobeams are used in many devices like nanoresonators, nanosensors and nanoswitches. This paper is helpful for designing and manufacturing nanoscale structures specially nanoresonators under different thermal loads.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"2 1","pages":"105 - 132"},"PeriodicalIF":0.4,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89503951","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

The Effect of Nanoparticles (n-HAp, n-TiO2) on the Thermal Properties and Biomechanical Analysis of Polymeric Composite Materials for Dental Applications 纳米粒子(n-HAp, n-TiO2)对牙科高分子复合材料热性能及生物力学分析的影响

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Nano Hybrids and Composites Pub Date : 2021-10-11 DOI: 10.4028/www.scientific.net/NHC.33.13

A. A. Mohammed, Jawad K. Oleiwi, E. Al-Hassani

引用次数: 2

New Results on Diffusion in Graphene Nanostructures for Sensoristics 传感用石墨烯纳米结构中扩散的新结果

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Nano Hybrids and Composites Pub Date : 2021-10-11 DOI: 10.4028/www.scientific.net/NHC.33.61

P. Di Sia

{"title":"New Results on Diffusion in Graphene Nanostructures for Sensoristics","authors":"P. Di Sia","doi":"10.4028/www.scientific.net/NHC.33.61","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.33.61","url":null,"abstract":"Graphene has particularly interesting chemical and physical properties, including high chemical and mechanical resistance, excellent thermal and electric transport, high transparency. It combines the peculiarity of being an extremely light material with exceptional mechanical strength properties. Micro/nanoelectronics represents one of the key enabling technologies (KETs) of the future; it is the basis of innovation and competitiveness of almost all scientific and applicative sectors. Activities involving it are aimed at the development of new materials, processes, devices and technologies in a wide range of sectors, involving quantum information manipulation, multi-functional platforms, advanced materials, devices on flexible substrates. In the field of sensoristics, it is possible to create devices for applications in most sectors of global interest, such as punctual sensors, biosensors, specific transducers, multisensoristic systems, flexible sensoristic systems, multifunctional systems, advanced MEMS/MOEMS technologies for sensoristics, micro/nanoactuators, devices for energy convertion, gravimetric-electrochemical sensors. The paper provides an interesting overview of the possible applications of graphene in relation to its mechanical, thermal and optical properties, and relatively to the gas and biological sensoristic aspects, so as interesting informations for the increase in nanobio-devices performance by last efforts in theoretical nanophysics.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"3 1","pages":"61 - 72"},"PeriodicalIF":0.4,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76942248","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

Effects of Plasticizers on Mechanical Properties, Oxygen Permeability, and Microstructural Characteristics of HPMC/Beeswax Composite Film 增塑剂对HPMC/蜂蜡复合膜力学性能、透氧性及微观结构的影响

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Nano Hybrids and Composites Pub Date : 2021-04-06 DOI: 10.4028/www.scientific.net/NHC.32.25

Thi Luong Nguyen, Pham Khanh Van Nguyen, Hoc Thang Nguyen, V. K. Nguyen, T. Pham, Thanh-Tung Nguyen

{"title":"Effects of Plasticizers on Mechanical Properties, Oxygen Permeability, and Microstructural Characteristics of HPMC/Beeswax Composite Film","authors":"Thi Luong Nguyen, Pham Khanh Van Nguyen, Hoc Thang Nguyen, V. K. Nguyen, T. Pham, Thanh-Tung Nguyen","doi":"10.4028/www.scientific.net/NHC.32.25","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.32.25","url":null,"abstract":"The ability to plasticize Hydroxypropyl Methyl Cellulose/Beeswax (HPMC/BW) composites depends on plasticizers and their concentration. This paper conducted studying on the impacts of plasticizers to HPMC/BW properties. The plasticizers were used in this research included Glycerol (G), Propylene Glycol (PG), and Polyethylene Glycol 400 (PEG 400) which had the concentration changed in range of 1-3%. HPMC/BW composite films incorporated with 2% of plasticizers formed films with the best characteristics among three tested concentration. Tensile strength and elastic modulus of films were decreased when adding plasticizers, whereas elongation at break were increased. Therefore, it caused an increase in oxygen permeability of HPMC/BW films in comparison with the control film. However, Glycerol showed the lowest Oxygen Permeability (OP) values compared to other composite films. The films were evaluated its microstructural quality using method of scanning electron microscopy (SEM) which had the effects of plasticizers and their efficiencies of plasticizing polymer networks.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"303 1","pages":"25 - 34"},"PeriodicalIF":0.4,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76141398","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

Interfacial Adhesion and Microstructure of Epoxy/Aluminium Particulate Nanocomposites 环氧/铝颗粒纳米复合材料的界面附着力和微观结构

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Nano Hybrids and Composites Pub Date : 2021-04-06 DOI: 10.4028/www.scientific.net/NHC.32.1

S. Bello, J. Agunsoye, Nasirudeen Kolawole Raji, J. A. Adebisi, I. Raheem, S. B. Hassan

引用次数: 0

Synthesis of Ammonia Directly from Air and Water via a Single-Chamber Reactor Using Lanthanum Chromite-Based Composite as an Electrocatalyst 以铬酸镧基复合材料为电催化剂在单室反应器中直接从空气和水合成氨

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Nano Hybrids and Composites Pub Date : 2021-04-06 DOI: 10.4028/www.scientific.net/NHC.32.35

Ibrahim Ali Ahmed Amar, M. M. Ahwidi

引用次数: 3

Stress Distribution on the Cracked Sandwich Plate with Non Linear Thermal and Moisture Concentration 含非线性热湿浓度的夹层板裂纹应力分布

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Nano Hybrids and Composites Pub Date : 2021-04-06 DOI: 10.4028/www.scientific.net/NHC.32.45

Mohamed Khodjet Kesba, Noureddine El Meiche, A. Benkhedda

引用次数: 0

Development of Banana/Coir Natural Fibers Reinforced Polypropylene Hybrid Composites: The Effect of MA-g-PP (Maleic Anhydride Grafted Polypropylene) on Mechanical Properties and Thermal Properties 香蕉/椰胶天然纤维增强聚丙烯杂化复合材料的研制:MA-g-PP(顺丁二酸酐接枝聚丙烯)对其力学性能和热性能的影响

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Nano Hybrids and Composites Pub Date : 2021-04-06 DOI: 10.4028/www.scientific.net/NHC.32.85

G. Bujjibabu, V. C. Das, M. Ramakrishna, K. Nagarjuna

{"title":"Development of Banana/Coir Natural Fibers Reinforced Polypropylene Hybrid Composites: The Effect of MA-g-PP (Maleic Anhydride Grafted Polypropylene) on Mechanical Properties and Thermal Properties","authors":"G. Bujjibabu, V. C. Das, M. Ramakrishna, K. Nagarjuna","doi":"10.4028/www.scientific.net/NHC.32.85","DOIUrl":"https://doi.org/10.4028/www.scientific.net/NHC.32.85","url":null,"abstract":"Banana/Coir fiber reinforced polypropylene hybrid composites was formulated by using twin screw extruder and injection molding machine. Specimens were prepared untreated and treated B/C Hybrid composites with 4% and 8% of MA-g-PP to increase its compatibility with the polypropylene matrix. Both the without MA-g-PP and with MA-g-PP B/C hybrid composites was utilized and three levels of B/C fiber loadings 15/5, 10/10 and 5/15 % were used during manufacturing of B/C reinforced polypropylene hybrid composites. In this work mechanical performance (tensile, flexural and impact strengths) of untreated and treated (coupling agent) with 4% and 8% of MA-g-PP B/C fibers reinforced polypropylene hybrid composite have been investigated. Treated with MA-g-PP B/C fibers reinforced specimens explored better mechanical properties compared to untreated B/C fibers reinforced polypropylene hybrid composites. Mechanical tests represents that tensile, flexural and impact strength increases with increase in concentration of coupling agent compared to without coupling agent MA-g-PP hybrid composites . B/C fibers reinforced polymer composites exhibited higher tensile, flexural and impact strength at 5% of Banana fiber, 15% of fiber Coir in the presence of 8% of MA-g-PP compared to 4% of MA-g-PP and untreated hybrid composites. The percentage of water absorption in the B/C fibers reinforced polypropylene hybrid composites resisted due to the presence of coupling agent MA-g-PP and thermogravimetry analysis (TGA) also has done.","PeriodicalId":18861,"journal":{"name":"Nano Hybrids and Composites","volume":"29 1","pages":"85 - 97"},"PeriodicalIF":0.4,"publicationDate":"2021-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87938121","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