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Asphaltic Material in the Context of Generalized Porothermoelasticity 广义孔热弹性下的沥青材料
ChemRN: Materials Characterization (Topic) Pub Date : 2017-02-28 DOI: 10.5121/IJSC.2017.8103
M. Alawi
{"title":"Asphaltic Material in the Context of Generalized Porothermoelasticity","authors":"M. Alawi","doi":"10.5121/IJSC.2017.8103","DOIUrl":"https://doi.org/10.5121/IJSC.2017.8103","url":null,"abstract":"In this work, a mathematical model of generalized porothermoelasticity with one relaxation time for poroelastic half-space saturated with fluid will be constructed in the context of Youssef model (2007). We will obtain the general solution in the Laplace transform domain and apply it in a certain asphalt material which is thermally shocked on its bounding plane. The inversion of the Laplace transform will be obtained numerically and the numerical values of the temperature, stresses, strains and displacements will be illustrated graphically for the solid and the liquid.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124134171","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
Zero-Sum Space on the Copper Surface Under Ultrasound 超声作用下铜表面的零和空间
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3873712
Jiahao Chen, Xiaoshi Hu, Wen Zhang, Yunlong Sun, Haiying Qin, Yongjun Yuan, Bao Lin
{"title":"Zero-Sum Space on the Copper Surface Under Ultrasound","authors":"Jiahao Chen, Xiaoshi Hu, Wen Zhang, Yunlong Sun, Haiying Qin, Yongjun Yuan, Bao Lin","doi":"10.2139/ssrn.3873712","DOIUrl":"https://doi.org/10.2139/ssrn.3873712","url":null,"abstract":"In the overlapped shell space between two adjacent cavitation bubbles, there theoretically exists a Zero-sum space without vibration due to the cavitation effect but still with pressure, high temperature and a high concentration of substances. Within the Zero-sum space, a stable environment for a chemical reaction is achievable under the ultrasound. In this work, some ring-shaped regions (outer diameter 48.90±3.5 μm, inner diameter 40.94±3.5 μm) on copper foil with distinctive morphology were investigated in the area covered by visible bubbles under ultrasound treatment in 1M NaOH for 3 h. The morphology and composition of these regions were found to be similar to that of sample fabricated in the same environment without ultrasound. It has confirmed the long-term existence of Zero-sum space and raised a hypothesis of Zero-sum space maintenance. This work may lead to release the ultrasonic synthesis from the limitation of ultrasonic frequency.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"12 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":"124208222","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
First-Principles Study of CO Adsorption on Os Atom Doped Anatase TiO2 (101) Surface Os原子掺杂锐钛矿TiO2(101)表面CO吸附的第一线原理研究
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3682798
Long Lin, Zhengguang Shi, Longbin Yan, H. Tao, Linwei Yao, Shaofei Li, Kun Xie, Jingtao Huang, Zhanying Zhang
{"title":"First-Principles Study of CO Adsorption on Os Atom Doped Anatase TiO2 (101) Surface","authors":"Long Lin, Zhengguang Shi, Longbin Yan, H. Tao, Linwei Yao, Shaofei Li, Kun Xie, Jingtao Huang, Zhanying Zhang","doi":"10.2139/ssrn.3682798","DOIUrl":"https://doi.org/10.2139/ssrn.3682798","url":null,"abstract":"In this paper, the first-principles is used to study the adsorption of CO on the surface of the anatase TiO2 (101) without and with an oxygen vacancy and noble metal (Os) dopant. The results show that TiO2 has well adsorption performance on CO, especially after adding defects, its adsorption performance is greatly improved. The adsorption energy of the pure system is -0.552 eV, the oxygen vacancy system is -1.591 eV, and the Os doping system is -3.971 eV. The analysis of the adsorption energy, bond length, charge distribution, the density of state and charge difference density shows that the adsorption mechanism and adsorption method of the three systems are different. The pure system is dominated by physical adsorption, and the carbon atom of CO has a strong interaction with Ti5C, but it fails to meet the conditions of forming a bond. The oxygen vacancy system is dominated by chemisorption, and the carbon atom of CO exerts a strong interaction with Ti2, resulting in a new bond C-Ti2. The Os doping system is dominated by chemisorption, and the carbon atom of CO exerts a strong interaction with the Os atom, which leads to the formation of C-Os bond.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"13 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":"130479144","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
Pd-Guanidine@Boehmite: Chemoselective, Phosphine-Free and Practical Nanocatalyst in Carbon-Carbon Cross Coupling Reaction Pd-Guanidine@Boehmite:碳-碳交叉偶联反应中的化学选择性，无膦和实用纳米催化剂
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3619927
A. Ghorbani‐Choghamarani, F. Jafari, N. Hasanzadeh
{"title":"Pd-Guanidine@Boehmite: Chemoselective, Phosphine-Free and Practical Nanocatalyst in Carbon-Carbon Cross Coupling Reaction","authors":"A. Ghorbani‐Choghamarani, F. Jafari, N. Hasanzadeh","doi":"10.2139/ssrn.3619927","DOIUrl":"https://doi.org/10.2139/ssrn.3619927","url":null,"abstract":"Boehmite nanoparticles were synthesized via Al(NO3)3⋅9H2O and NaOH solution and then, an complex of Pd was fabricated on its surface (Pd-Guanidine@boehmite). This nanocatalyst was used as practical and recoverable nanocatalyst for the chemoselective C-C band formation such as Mizoroki-Heck and Suzuki–Miyaura reactions without phosphine ligands or inert atmosphere. This catalyst has been characterized by some analysis such as EDS, WDX, SEM, TGA, AAS, and BET. Also, obtained products from C-C coupling reactions were identified by NMR spectroscopy and melting points. This catalyst was recycled in described reactions without palladium leaching under reaction conditions.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"213 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":"122289490","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
Experimental Demonstration of the Structure of Silar Synthesised Iron Lead Sulphide (PbS) Thin Films for Poultry Farms in Agbaja Unuhu-Ebonyi State-Nigeria 尼日利亚Agbaja Unuhu-Ebonyi州家禽农场硅合成硫化铁铅(PbS)薄膜结构的实验演示
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.38177/AJAST.2021.5114
Udeajah V.N.
{"title":"Experimental Demonstration of the Structure of Silar Synthesised Iron Lead Sulphide (PbS) Thin Films for Poultry Farms in Agbaja Unuhu-Ebonyi State-Nigeria","authors":"Udeajah V.N.","doi":"10.38177/AJAST.2021.5114","DOIUrl":"https://doi.org/10.38177/AJAST.2021.5114","url":null,"abstract":"The effect of iron-doping on lead sulphide (PbS) thin films deposited on glass substrates via successive ionic layer adsorption (SILAR) Technique using lead Nitrate, Pb(NO3)2, thiourea, Iron (II) Chloride dehydrate(Fe Cl2.2H2O), ethanol and ammonia by in alkaline medium annealed between 283K and 500K was investigated. The X-ray diffraction (XRD) Analysis and Scanning electron microscopy (SEM) were done to determine the structure and morphology respectively for use in poultry farms in Akpabuyo-Cross River State. The XRD showed PbS thin films being cubic and face-centred crystalline nanoparticles.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"28 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":"124637054","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
Computational Approach to Predict Phase Fraction in Dual-Phase High Entropy Alloys 双相高熵合金相分数预测的计算方法
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3507459
A. Negi, Ayush Sourav, T. Shanmugasundaram
{"title":"Computational Approach to Predict Phase Fraction in Dual-Phase High Entropy Alloys","authors":"A. Negi, Ayush Sourav, T. Shanmugasundaram","doi":"10.2139/ssrn.3507459","DOIUrl":"https://doi.org/10.2139/ssrn.3507459","url":null,"abstract":"Type and fraction of secondary phase play a significant role in determining the properties. For the first time, a computational method is used to predict the phase fraction in dual phase high entropy alloy systems. In this work, a new parameter δ<sub>c</sub>(critical lattice distortion) is proposed. Valence electron concentration (VEC) and δ<sub>c</sub> are used to predict phase fraction. To validate the model a series of Al<sub>x</sub>CoCrFeNi (x=0.3, 0.5, 0.7) alloy was synthesized by vacuum arc melting and analysed using x-ray diffraction and electron backscatter diffraction techniques. It is found that the experimental results agree closely with the predicted value.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"41 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":"127321468","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
Pyridine Schiff Base Functionalized Mesoporous Channels as Fluorescent Detection of Silver Ions in Aqueous Medium 吡啶席夫碱功能化介孔通道对水溶液中银离子的荧光检测
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3656146
Lifen Hao, C. Feng, Huang Jiahui, Wang Jianqiang, Wang Cheng, Bai Yimeng, Lu Longjuan
{"title":"Pyridine Schiff Base Functionalized Mesoporous Channels as Fluorescent Detection of Silver Ions in Aqueous Medium","authors":"Lifen Hao, C. Feng, Huang Jiahui, Wang Jianqiang, Wang Cheng, Bai Yimeng, Lu Longjuan","doi":"10.2139/ssrn.3656146","DOIUrl":"https://doi.org/10.2139/ssrn.3656146","url":null,"abstract":"A novel fluorescent probe based on functional mesoporous material (denoted as SBA-KH-2py) with high sensitivity and selectivity of detecting silver ions (Ag + ) was designed and prepared by immobilizing (4-nitro-2-((pyridin-2-ylmethylene) amino) aniline (denoted as 2py-Schiff base) within the channels of mesoporous material. The 2py-Schiff base was successively loaded within the framework of mesoporous material by the organic silane coupling agent, and the ordered channels were still retained. With the increasing loading amounts of Schiff base, the fluorescence intensities of functional materials also were enhanced in the fluorescent spectra excited by the same wavelengths. Especially, the material SBA-KH-20%-2py possesses the strongest fluorescence intensity. Moreover, in the recognition experiments, it can definitely distinguish Ag + ions in aqueous solutions, which shows the excellent selectivity and high sensitivity.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"157 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":"127366055","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
Micro X-Ray Diffraction Study of Polycrystalline MgB 2 Wire and Evaluation of Carbon Doping Effect Via Low-Temperature Sintering 多晶mgb2丝的微x射线衍射研究及低温烧结碳掺杂效果评价
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3474468
M. Maeda, Dipak Patel, Dr., Hiroaki Kumakura, Dr., Gen Nishijima, Dr., Akiyoshi Matsumoto, Dr., Jun Hyuk Choi, Dr., Dong Gun Lee, Su-Hun Kim, Jung Ho Kim, Prof. Seyong Choi
{"title":"Micro X-Ray Diffraction Study of Polycrystalline MgB 2 Wire and Evaluation of Carbon Doping Effect Via Low-Temperature Sintering","authors":"M. Maeda, Dipak Patel, Dr., Hiroaki Kumakura, Dr., Gen Nishijima, Dr., Akiyoshi Matsumoto, Dr., Jun Hyuk Choi, Dr., Dong Gun Lee, Su-Hun Kim, Jung Ho Kim, Prof. Seyong Choi","doi":"10.2139/ssrn.3474468","DOIUrl":"https://doi.org/10.2139/ssrn.3474468","url":null,"abstract":"Simple and efficient characterization of local structural states in materials is desirable for evaluating and tailoring the material performance. Herein, we have focused on micro X-ray diffraction and conducted a local structure characterization for superconducting wires having MgB<sub>2</sub> polycrystalline cores. The critical current properties of the superconducting materials were controlled and improved by a low-temperature sintering approach with malic acid doping as a carbon source. The transport performance depending on the sintering and doping effects was found to be closely associated with the characterized properties of the local structures. The evaluation method will therefore be useful to develop composite conductors.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"270 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":"116249042","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
Comparative Structural Description of Five Arene Ruthenium(Ii) Complexes with N,N- Bidentate Schiff Base Ligands and Related Complexes from Literature 五种芳烃钌(Ii)与N,N-双齿席夫碱配体及相关配合物的结构比较描述
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3599753
B. Owaga
{"title":"Comparative Structural Description of Five Arene Ruthenium(Ii) Complexes with N,N- Bidentate Schiff Base Ligands and Related Complexes from Literature","authors":"B. Owaga","doi":"10.2139/ssrn.3599753","DOIUrl":"https://doi.org/10.2139/ssrn.3599753","url":null,"abstract":"Isostructurality between certain pairs of complexes A series of new half-sandwich Ru(II) complex salts of the general formula [(η6-arene)RuX(L)]PF6 (where arene = p-cymene, X = Br and L = N-tert-butyl-N-(pyridyl methylene) amine (1), N-isopropyl-2-pyridine carbaldimine (2), (2,5-dimethyl-phenyl)-pyridin-2-yl methylene amine (3), (3,5-dimethyl-phenyl)-pyridin-2-yl methylene (4) and arene = C6H6, X = I, L = (4-bromo-phenyl)-pyridin-2-yl methylene (5) have been synthesized by reacting the ruthenium arene precursors [(η6-arene)Ru(μ-X)X]2 with N,N-bidentate ligands in a 1:2 ratio. Full characterization of the complexes was accomplished using 1H and 13C NMR, elemental analyses, UV-Vis, IR and X-ray structures of all the complexes 1 - 5. The crystal structures reveal that the ruthenium centers in 1 - 5 are coordinated to the N,N-bidentate ligand in a bidentate manner, to the respective halide and to the arene ring. The whole arrangement is referred to as the three-legged piano stool, in which the N,N-bidentate ligand and the halide (Br or I) serve as the base, while the arene ring serves as the apex of the stool. A comparison to related structures from the CSD reveal isostructurality amongst certain pairs of complexes.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","volume":"1 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":"131365996","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
Contribution of Crystal Lattice Defects to Polycrystalline SiC Corrosion 晶格缺陷对多晶SiC腐蚀的贡献
ChemRN: Materials Characterization (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3603594
S. Kondo, Kotaro Seki, Y. Maeda, Hao Yu, Kazuhiro Fukami, R. Kasada
{"title":"Contribution of Crystal Lattice Defects to Polycrystalline SiC Corrosion","authors":"S. Kondo, Kotaro Seki, Y. Maeda, Hao Yu, Kazuhiro Fukami, R. Kasada","doi":"10.2139/ssrn.3603594","DOIUrl":"https://doi.org/10.2139/ssrn.3603594","url":null,"abstract":"The relationship between lattice defects and the corrosion of SiC irradiated with heavy ions at 400 °C and 800 °C was investigated using electrochemistry and electron spin resonance spectroscopy. An immersion test in high-pressure hot water was also used to evaluate surface recession. The corrosion current increased monotonically with dangling-bond (DB) density, indicating that DBs were the primary reaction sites. Further, the surface recession rate in hot water increased exponentially with increasing DB density. The dense DBs were found to be surrounded by distorted lattices. These findings indicated that SiC dissolution was further accelerated by the accumulated lattice distortion.","PeriodicalId":314762,"journal":{"name":"ChemRN: Materials Characterization (Topic)","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":"130087315","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
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