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Online since: November 2010
Authors: Chen Li, Min Li, Du Yao Zhang
Scanning electron microscopy (SEM) and contact angle analyzer were used to characterize and analyze the surface morphology, structure and hydrophobicity of these samples.
As later interface theories develop, it is proposed that the fundamental method of acquiring superhydrophobic surfaces is to combine stepped micro/nano-structures with modification using a layer of low surface energy [5].
References [1] Xie Chunyan: Master Degree thesis, Beijing University of Aeronautics and Astronautics (2010) [2] Guo Min, Diao Peng, Cai Shengmin and Liu Zhongfan: Chemical Journal of Chinese Universities, Vol.25 No.3 (2004), p.547-549 [3] Gao Shan, Gu Jinghua and Zhang Yue: Chinese Journal of Inorganic Chemistry, Vol.26 No.1 (2010), p.55-60 [4] Zhu buyao and Zhao Zhenguo: Basis of interface chemistry (Chemical Industry Press, China 2004) [5] Yang Taisheng: Master Degree thesis, Shandong Institute of Light Industry (2009) [6] Liu Dongping, Yin Yejun, Li Dongming, Niu Jinhai and Feng Zhixing: Thin Solid Films, Vol.517 No.13 (2009), p.3656-3660 [7] Liu Dongping, Li Wei, Feng Zhiqing, Tan Xiaodong, Chen Baoxiang, Niu Jinhai and Liu Yanhong: Surface & Coatings Technology, Vol.203 No.9 (2009), p.1231-1236
Online since: November 2014
Authors: Mohd Sabri Mohd Ghazali, Jamali Sukaimi, Sofiah Hamzah
The structures of FHAP were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction.
These impurities will affect the HAp crystal structure, crystallinity and solubility, thus limiting the application of HAp, especially in biomedical applications [11,12].
Park, The facile and low temperature synthesis of nanophase hydroxyapatite crystals using wet chemistry, Materials Science and Engineering C 36 (2014) 152–159 [19] U.
White, Synthesis and crystallization of macroporous hydroxyapatite, Journal of Solid State Chemistry 178 (2005) 2838–2845 [22] H.
Online since: July 2011
Authors: Ying Jie Lei, Jie Ouyang, Mei Ding
Synthesis and spectroscopic properties of 2-(7-Fluoro-1H-imidazo[4,5-b]phenazin-2-yl)-phenol Derivatives Lei Yingjie a, Ouyang Jie b and Ding Mei c School of Chemistry & Chemical Engineering,Tianjin University of Technology,China a yingjlei@163.com, b ouyangi@tjut.edu.cn, c ding.meii@163.com Keywords: 2-(7-Fluoro-1H-imidazo[4,5-b] phenazin-2-yl)-phenol; Synthesis; Fluorescence Abstract.
As a part of program of developing new fluorescent probes, we tried to investigate the idea of appending the HPBI moiety to phenazine nucleus to combine their beneficial effects in a single structure.
Dependence of Normal and Tautomer Emission on the Structure.
A possible explanation to this is a certain steric hindrance from phenazine moiety within the planar structure which makes it more difficult for the interconversion between two intramolecular hydrogen bonded rotamers I and II and, therefore, a redistribution occurs of the intensity of the separate vibrational components, which led it easier for II to undergo ESIPT to form a tautomer III so that a tautomer emission with large Stokes’shift could be prefered.
Photochem A: Chemistry, 2002,149: 217-225
Online since: December 2014
Authors: Jian Xin Shou, Mu Qing Qiu, Gang Chao Zhu, Jia Wei Qian, Hua Zheng Xin
Carbon nanotubes with water resistance , hollow tubes structure , high specific surface area , good chemical stability , special electronic structure , is the ideal catalyst support material.
Chinese academy of sciences, chengdu organic chemistry co.
Iron oxide can be seen from the diagram, the load characteristic peak of MWCNTs after still exists, that after nitric acid axidation treatment of the graphite structure of MWCNTs were not damaged .
Liu: Physical Chemistry Chemical Physics Vol. 13(2011), p.3491
Online since: April 2012
Authors: Shao You Liu, Yan Su, Wen Hua Tang
Photodecomposition of Methylene Blue by the S, Al Doped TiO2 Mesoporous Materials Su Yana, Liu Shao-You b, Tang Wen-Huac Institute of Applied Chemistry, Kaili University, Guizhou, Kaili, 556011, China a1197545259@qq.com; blsy651204@163.com; ctangwenhua2009@163.com Keywords: S, Al Doped TiO2; Mesoporous material; Solid-state Reaction; Photodecomposition; Methylene Blue Abstract.
The crystal structures of pure TiO2, S-TiO2 can be ascribed to a mixed phase of rutile and anatase, but the S-Al-TiO2 and Al-TiO2 samples can be assigned to anatase.
Moreover, The diffraction peak in (101) crystal plane for the doping of S and Al materials widen in evidence, which indicates the doping ions have been entered into the lattice of TiO2 crystal structure, leading to the partial distortion of crystal lattice in TiO2 and the swell or shrinkage of unit cell volume.
Moreover, the highest photocalytic activity of the S-Al-TiO2 is resulted from the cooperative effects by S and Al, the smaller crystal size, higher specific surface area as well as its mesoporous structure.
Acknowledgements This project was supported by the National Natural Science Foundation of China (No.21061006); Research of Natural Science and Technology Foundation of Guizhou Province ([2010]2006), China; Guizhou Province Characteristic Leading Academic Discipline Project in Material Physics and Chemistry (No.[2011]208).
Online since: March 2014
Authors: Lan Xu, Hong Ying Liu, Na Si
They offer new opportunities in areas of inclusion chemistry, guest-host synthesis and molecular manipulations and reaction in the nanoscale for making nanoparticles, nanowires and other quantum nanostructures [6].
Figure 1 showed the main chemical structure of the Chinese drug Notoginseng [13].
Figure 1 The main chemical structure (Type A) of the Chinese drug Notoginseng [13].
PBS with a molecular weight of 20,000-30,000 g/mol was supplied by Shanghai Institute of Organic Chemistry (SIOC), Chinese Academy of Science.
The hierarchical pore structure further enlarges the surface area and a b d c e Figure 5 Static contact angle of electrospun nanoporous materials with different Chinese drug concentration (a-0; b-0.5; c-1; d-1.5; e-2).
Online since: December 2014
Authors: Yu Han Li, Ri Zhe Jin
R. of China 2 Polymer Composites Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.
Figure 1 shows of chemical structures of SPI-1 and SPI-2.
Chemical structures of SPI-1 and SPI-2 Membrane formation and Proton Exchange Films (in triethylamine salt form) were prepared by casting their m-cresol solution (10 wt%) onto glass dishes and dried at 80 °C for 24h.
The chemical structure of copolyimide was confirmed by FT-IR spectroscopy.
Sabharwal, Radiation Physics and Chemistry Vol. 80 (2011), p. 803 [13] A.
Online since: March 2018
Authors: Bianca Mae Z. Crisogono, Sarah Katrina V. Salvacion, Marvin S. Tolentino, Ruth R. Aquino
Salvaciond School of Chemical Engineering and Chemistry, Mapúa University 1002, Philippines arraquino@mapua.edu.ph, bmtolentino@mapua.edu.ph, cbmzcrisogono@mymapua.edu.ph, dsarah_katrina1195@yahoo.com Keywords: Adsorption isotherm, electrospinning process, nanostructured membrane, polysulfone, organo-montmorillonite.
As nanotechnology emerges, Xu et al. (2012) have reported that electrospunnanomembranes have the potential to be an ideal adsorbent for wastewater treatment due to its porosity with an interconnected pore structure and high surface area to volume ratio [4].
An electrospunnanomembrane is a network of nanofibrous structures obtained by electrospinning.
However, this type of membrane has low mechanical strength which is caused by its loose structure and small interactive binding forces.
Montmorillonite is a hydrophilicnanoclay with a rich intercalation chemistry and a unique two-dimensional nanostructure that makes it a good additive to PSF.
Online since: August 2014
Authors: Zhu Jun Tian, Fu Quan Jia
Fig. 1 The energy spectrum figure of phosphorus’s characteristics gamma rays (4) the design of simulating structure According to the structure characteristics of D-D neutron generator and BGO gamma ray detector, the structure used by MCNP simulation is shown in Figure 2.
Journal of Radioanalytical and Nuclear Chemistry, 2004, 262(2): 493-496
Journal of Radio analytical and Nuclear Chemistry, 1991, 151(1): 83-93
Online since: February 2020
Authors: Victor A. Sozaev, Anatoly Akhkubekov, Svetlana Akhkubekova, Olga Gudiyeva, Yuriy Kasumov
Thus, based on above mentioned arguments, it is possible to admit, that initial stage of CM is a result of the melting of low dimensional structures of contacting surfaces.
Therefore radius of the spheres rs can be associated with the period a of the crystal lattice: for body-centered crystal lattice rs = 0.492·а; for face centered lattices: rs = 0.391·а and for hexagonal close-packed - structures: rs = 0.550·а (in this case it is taken into account, that c/а = 1.63).
[3] I.P Vyrodov O phizicheskoy sushnosty contactnogo plavleniya i formirovaniya meshfaznogo sloya, Journal of Phisical Chemistry, deponent VINITY, №1102-78, (1978), 10
[11] I.P Dobrovolskij, B.A Kartashkin, А.I Polyakov, M.H., Shorshorov, O prirode i mechanisme kontaktnogo plavleniya, Physics and chemistry of processing of materials, №2, (1972) 36-39
Rosner, G.Wilde, The impact of altered interface structures on the melting behavior of embedded nanoparticles, Scripta mater, V. 55, (2006) 119-122, [18] QS.