Materials Literature
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In summary, we demonstrated a novel non-volatile ferroelectric polymer transistor memory operating at low voltage with reliable data retention. The nanometer scale periodic trenches of OS lamellae were prepared using block copolymer self assembly and employed as a gate insulator by hybridizing with PVDF-TrFE. Confined…
The addition of ferrocene to the styrene-benzoyl peroxide-fullerene C 60 system results in changes in the kinetics of the process. This phenomenon is apparently related to not only formation of an effective redox initiating system based on benzoyl peroxide and ferrocene but also complexation between ferrocene and full…
A Detailed Transmission Electron Microscopy (TEM) Study Has Been Made of the Ageing Hardening Behavior of the γ1-Ti4Nb3Al9Precipitation Phase in the γ-TiAl Matrix in Ti-Al-Nb System. it Is Revealed that the γ1-Ti4Nb3Al9Precipitate, which Is Formed by a Normal Quench at 1473k and Ageing Treatment at 1073K, Takes Needle…
The direct replication of a periodic W/Si multilayer was investigated systematically. The W/Si multilayer was deposited by a high vacuum dc magnetron sputtering system. After deposition, the multilayer was transferred from the supersmooth mandrel onto a commercially available float glass substrate by the epoxy replica…
Two kind of polyimide/silica nanocomposites which were recorded poly(amic acid)/ silica(PAA/SiO2) and SiO2in poly(amic acid) ammonium salt(PAS/SiO2) respectively, have been prepared for different methods. The size of SiO2in PAA/SiO2and PAS/SiO2are measured by Particle size analysis and the average particle size are 37…
Six-coordinated Zn (II) complex material {bis[5-methyl-2-pyrazinecarboxylic acid] Zinc(II)} was synthesized and determined by single-crystal X-ray diffraction, The results of crystal structure show that Zn (II) complex material crystallizes in a triclinic system, the Zn2+ ion is in a distorted octahedral coordination…
The aromatic polyester from diphenolic acid and isophthaloyl chloride was synthesized by interfacial polycondensation with tetrabutylammonium chloride as phase transfer catalyst. The structure was characterized by means of FTIR. The poly(DPA-IPC) solution was titrated by aqueous HCl solution. The titration curves were…
Butyl rubber was synthesis by solution process in hexane-chloromethane mixed solvent using ethylaluminium sesquichloride/water as initiating system The product has comparable properties with BK1675(solution process) and EXXON268（slurry process）in terms of molecular, molecular distribution, unsaturated degree as well a…
Block copolymers D,L-Polylactide-b-poly(poly(ethylene glycol) methyl ether acrylate) (D,L- P(LA)-b-P(PEGMA)) were prepared via ring-opening polymerization and reversible addition fragmentation chain transfer (RAFT) polymerization. The block polymers generated in the reaction reveal the living behavior with the molecul…
A new ligand, 1,1'-(pyridin-2,6-diyl)bis-3-p-tolylpropane-1,3-dione(H2L), was prepared and its crystal structure displays its enol isomer. The binary complex, Ln2L3·4H2O [Ln = Eu(III) and Tb(III)], were synthesized by the reaction of synthesized ligand (H2L) and Ln(III). With 1,10-phenanthroline (Phen) as the synergis…
The two most common methods to grow single crystals are the evaporation of solvent and the diffusion of one kind of solvent to solution. Evaporation-induced self-assembly has been widely used to make nanostructures, but to date there is no report on the nanostructures from solvent diffusion-induced self-assembly. In t…
Solar cell, One-dimensional nanostructure, Surface reflectance, Plane-wave expansion Abstract. In this paper, we design a one-dimensional (1-D) a-Si nanostructure, orthogonizing the two processes to avoid their competition. Shapes of the structure include 1-D nanowire and 1-D nanocone. With the method of plane-wave ex…
Interest in electronic properties of organic materials has been stimulated by emerging prospects of their application in electronics and photonics [1–4]. Among potential applications, one may envisage use of organic materials as active elements of molecular switches. According to a general definition, a switch is a me…
Starch/PVA biocomposite films reinforced with cellulose nanofibrils were prepared by solution casting method incorporating glycerol as a plasticizer. These biocomposite films along with unreinforced films were subjected to biodegradation in an aerobic compost pit. The extents of biodegradation of these films were stud…
Rare earth antimonide stoichiometric compounds RE2FeSb2(RE=Y, Dy, Er) were prepared and examined by X-ray diffraction technique. XRD analysis showed that these alloys were crystallized in cubic RESb-type structure. The electrochemical properties of these alloys such as discharge capacity and cycling performance were i…
Glasses of 2Bi 2 O 3 -3GeO 2 - x Fe 2 O 3 composition, where x = 0–1.5, are obtained under oxidizing and reducing conditions. Glass-ceramic materials are produced by the thermal treatment of the glasses, the properties of which, as well as those of the original glasses, are studied by the methods of X-ray phase analys…
Broadband 1.20 μm emission (1G4→3H4transition) in Tm3+-Tb3+/Eu3+codoped gallo-germanate glasses was observed. The population inversion is realized by depleting the lower3H4level, and the possible energy transfer processes involved are discussed.
본 연구에서는 폴리비닐알코올(Polyvinyl alcohol : PVA)와 메틸셀룰로오스(Methyl cellulose: MC)를 사용하여 항균성을 갖는 필름을 제조하였다. 메틸셀룰로오스와 폴리비닐알코올 필름에 항균성을 부여하기 위해 ampicillin(0.025~1wt%)과 streptomycin(0.1~1.0 wt%)을 첨가하여 함량에 따른 기계적인 물성과 항균활성을 확인하였다. 중합도와 검화도에 따른 PVA 필름의 기계적인 물성을 보면 중합도와 검화정도에 따라 필름의 인장강도가 20.2~51.5 $N/mm^2$ 이었고, 메틸셀룰로오스 필름의 경우 점도에 따라…
In this study we report on some features of the fine structure of 4,8-dihydroxynaphthalene-1,5dicarbaldehyde (I) [1] recently synthesized in our laboratory, a compound promising for versatile synthetic purposes.The analysis of 1 H NMR spectrum in deuterochloroform shows that two forms are present in the solution:
SiO2/TiO2 photocatalyst was prepared by a sol-gel method applying tetrabutyl titanate as the precursor and cullets as the carrier. The optimal preparing conditions of the SiO2/TiO2 composite photocatalyst were optimized. The optimal conditions included 2:1 of the molar ratio of tetraethyl orthosilicate to tetrabutyl t…