Advances in Materials Sciences最新文献_第4页

In-situ synthesis of graphene on surface of copper powder by rotary CVD and its application in fabrication of reinforced Cu-matrix composites 旋转CVD在铜粉表面原位合成石墨烯及其在增强cu基复合材料中的应用

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000123

Qiao-Ping Xiao, X. Yi, B. Jiang, Zehua Qin, Jun Hu, Yong Jiang, Huiqun Liu, Bin Wang, D. Yi

{"title":"In-situ synthesis of graphene on surface of copper powder by rotary CVD and its application in fabrication of reinforced Cu-matrix composites","authors":"Qiao-Ping Xiao, X. Yi, B. Jiang, Zehua Qin, Jun Hu, Yong Jiang, Huiqun Liu, Bin Wang, D. Yi","doi":"10.15761/AMS.1000123","DOIUrl":"https://doi.org/10.15761/AMS.1000123","url":null,"abstract":"A novel approach has been developed for fabricating graphene (Gr) reinforced Cu composites. First, graphene was synthesized in-situ on surface of micron-sized copper powder through rotary chemical vapor deposition (RCVD). Then, the composite powders were hot pressed into bulk Gr-Cu composite pieces in vacuum. During RCVD, methane flow rate controlled the number of layers in synthesized graphene. Analyses of Raman spectroscopy suggested that graphene with varied layer numbers were formed on Cu powder surface. The as-fabricated graphene exhibited a ‘wrinkle’ type morphology with a homogeneous distribution observed by fielde mission scanning electron microscopy (SEM). After hot pressing, the structure and morphology of graphene were preserved in the Gr-Cu bulk composites, as confirmed by high-resolution transmission electron microscopy (HRTEM). Physical and mechanical properties of these bulk composites were studied. They were nearly fully densified and featured with an increase of more than 30% in hardness, as well as similar electrical conductivity and thermal conductivity as compared with pure Cu. The mechanism therein was discussed. Correspondence to: Danqing Yi, School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, P.R. China,Tel: +86-73188830263; Fax: +86-731-88836320; E-mail: yioffice@csu.edu.cn, danqing@csu. edu.cn","PeriodicalId":408511,"journal":{"name":"Advances in Materials Sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115062549","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: 10

Stabilization of Pickering Emulsions by Iron oxide Nano-particles (Fe3O4 NPs) 氧化铁纳米颗粒(Fe3O4 NPs)对酸洗乳的稳定作用

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000107

I. Udoetok, L. Wilson, J. Headley

引用次数: 14

Thermal stability of pulse electroplated gold films: SEM-EBSD studies 脉冲镀金膜的热稳定性:SEM-EBSD研究

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000118

Srinivas Palli, S. Dey

{"title":"Thermal stability of pulse electroplated gold films: SEM-EBSD studies","authors":"Srinivas Palli, S. Dey","doi":"10.15761/AMS.1000118","DOIUrl":"https://doi.org/10.15761/AMS.1000118","url":null,"abstract":"This paper reports the effect of annealing at various temperatures on microstructure and microtexture of the gold films deposited onto SiO2/Si(100) substrate using pulsed electrodeposition (PED). The samples were annealed for 3 days at 850oC and for 5 hours at 900oC and 910oC. The microstructure and thermal stability of the electrochemically deposited gold films before and after annealing was investigated using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) techniques. It is found that with increase of the annealing temperature the grain size of the deposits, the intensity of <0 0 1>//GD fiber texture and the volume fraction, average grain size of cube and rotated cube texture components are also increased whereas the number of grains decreased. Though maximum intensity of the <0 0 1>//GD fiber texture increases upon annealing, the deposition texture of gold film remains unchanged. The transformation of texture component of the annealed gold samples is explained by grain growth only. Correspondence to: Suhash R Dey, Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy-502285, India, Tel: +91(0)4","PeriodicalId":408511,"journal":{"name":"Advances in Materials Sciences","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114315433","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: 2

Antioxidant modified amphiphilic polymer improves intracellular cryoprotectant delivery and alleviates oxidative stress in HeLa cells 抗氧化剂修饰的两亲性聚合物改善细胞内低温保护剂的递送，减轻HeLa细胞的氧化应激

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.17863/CAM.18084

N. Slater, A. Chen, S. Mercado

{"title":"Antioxidant modified amphiphilic polymer improves intracellular cryoprotectant delivery and alleviates oxidative stress in HeLa cells","authors":"N. Slater, A. Chen, S. Mercado","doi":"10.17863/CAM.18084","DOIUrl":"https://doi.org/10.17863/CAM.18084","url":null,"abstract":"The design and synthesis of a dual-function, cell permeating polymer with an antioxidative property is described and its use for the intracellular delivery of the cryoprotectant trehalose into HeLa cells is demonstrated. The polymer, PVitE-25, was created by grafting the water insoluble hydrophobic antioxidant (±)-α-Tocopherol (vitamin E) onto pendant carboxylate groups of a biocompatible cell permeating polymer, poly (L-lysine iso-phthalamide) (PLP). The modification increased the intracellular delivery efficiency of the polymer and also introduced an antioxidative effect that was able to reduce 85% of reactive oxygen species (ROS) in HeLa cells incubated with 1 mM hydrogen peroxide (H2O2), as determined by 2′,7′-Dichlorofluorescin diacetate (DCFH-DA) probe. PVitE-25 was also used to load the cropreservative trehalose into HeLa cells prior to freezing such that the level of cell viability measured 48 hours after cell revival was comparable to that observed with a standard Me2SO-based cryopreservation protocol. This is the first report of a synthetic intracellular delivery system that facilitates the intracellular delivery of the cryoprotectant, trehalose, and mitigates oxidative stress during the freeze thaw cycle of cryopreservation. Correspondence to: Nigel KH Slater, Department of Chemical Engineering, University of Cambridge, Phillipa Fawcett Drive, West Cambridge Site, Cambridge CB3 0AS, UK, Tel: +44 (0) 1223 762953; Fax: +44 (0) 1223 334796; E-mail: nkhs2@cam.ac.uk","PeriodicalId":408511,"journal":{"name":"Advances in Materials Sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131267117","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

Methylmercury accumulation in rice plants (Oryza sativa L.) In low Hg areas and the potential health - Risk exposing in extreme micro-environments 水稻(Oryza sativa L.)甲基汞积累在低汞地区和潜在的健康风险暴露在极端微环境

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000129

Shunlin Tang, Huipeng Fan, Tonghua Mao, Zhongwei Huang

引用次数: 2

Quantum mechanical study of GaxAsx fullerene type Micro-Clusters for X=10, 13, 15, 18, 20, 25 and 30 atoms X=10、13、15、18、20、25和30原子的GaxAsx富勒烯型微团簇的量子力学研究

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000128

Deep Kumar, Ankur Trivedi, Devesh Kumar

引用次数: 0

Development of novel thiolated carboxymethyl-gellan gum as potential mucoadhesive polymer: Application of DoE 新型硫代羧甲基结冷胶作为潜在黏附聚合物的开发及其应用

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000125

Mahesh P. More, Manoj S. Bhamare, C. J. Bhavsar, P. Patil, Prashant K. Deshmukh

引用次数: 12

Beneficial effects of zeolites on plant photosynthesis 沸石对植物光合作用的有益影响

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000115

C. Smedt, K. Steppe, P. Spanoghe

引用次数: 28

Polymer based graphene/zinc oxide nano crystal (GZnNC): an outstanding thermoelectrical energy conversion material 聚合物基石墨烯/氧化锌纳米晶体(GZnNC):一种杰出的热电能量转换材料

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000119

Abhijit Dey, P. More, P. Khanna, A. Sikder, S. Chattopadhyay

{"title":"Polymer based graphene/zinc oxide nano crystal (GZnNC): an outstanding thermoelectrical energy conversion material","authors":"Abhijit Dey, P. More, P. Khanna, A. Sikder, S. Chattopadhyay","doi":"10.15761/AMS.1000119","DOIUrl":"https://doi.org/10.15761/AMS.1000119","url":null,"abstract":"This work presents the synthesis of a new material, graphene/zinc oxide nano composite (GZnNC) by employing ultrasonication techniques where nano-ZnO and graphene nano-sheet have been dispersed in ethanol followed by microwave irradiation. The GZnNC was well characterized by XRD, HRTEM, FTIR, and Raman spectroscopy. Also, polymer based GZnNC has been subjected to the measurement of energy harvesting/thermoelectric properties. Present study includes PVAc, PVAc/PEDOT: PSS, and PEDOT: PSS based compositions with concentration variation of GZnNC/graphene and measurement of thermoelectric properties like electrical conductivity, Seebeck coefficient, power factor (PF), thermal conductivity and figure of merit(ZT). PEDOT: PSS/GZnNC composite showed the twelvefold increase in electrical conductivity and two times increase in Seebeck coefficient as compared to the PVAc-graphene composite. Interestingly, the calculated power factor for PEDOT: PSS/GZnNC composite increases up to 50 times as compared to PVAc/graphene composite. Thermal conductivity gets reduced to 3.01 W/mK Hence, figure of merit is reached up to 0.0051. This value is comparatively very high compare to the existing nanocomposites. Correspondence to: Arun K. Sikder, EMR Division, High Energy Material Research Lab, Sutarwadi, Pune-411021, India, E-mail: ak_sikder@rediffmail.com","PeriodicalId":408511,"journal":{"name":"Advances in Materials Sciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129598576","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

“CA”- Angular Lift Coefficient Theory in Horizontal Plane Takeoff Using Liquid Fuels “CA”-使用液体燃料水平飞机起飞的角升力系数理论

Advances in Materials Sciences Pub Date : 1900-01-01 DOI: 10.15761/AMS.1000111

Francisco L. O. Bedê

引用次数: 0