Materials Literature
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A proton exchange membrane is a core component in the proton exchange membrane fuel cell because the role of proton exchange membrane (PEM) is supplying proton conductivity to fuel cell, a gas separator, and insulating between an anode and cathode. Among various role of PEM, supplying proton conductivity is the most i…
Nickel-base superalloys have been emerged as materials for gas turbines used for jet propulsion and electricity generation. The strength of the superalloys depends mainly from an ordered precipitates of L12 structure, so called gamma prime (γ’) dispersed within the disorder γ matrix. The Ni-base alloys investigated in…
Our interest has been focused on mechanical recycling of poly(ethylene-terephthalate) (PET) bottle waste, because recycling of plastic waste has crucial importance nowadays. The present article deals with the effects of washing of the secondary raw materials on properties of carbon nanotube (CNT) reinforced composites…
The introduction of inorganic nanoparticles into organic materials enhances both the mechanical and chemical properties of the material. Metallic nanoparticles, like silver and gold, have been introduced into polymers for use as antimicrobial coatings or dielectric materials, respectively. The challenge in creating th…
Understanding the relationships between microstructures and properties of materials is a key to developing new materials with more suitable qualities or employing the appropriate materials in special uses. In the present world of material research, the main focus is on microstructural control to cost-effectively enhan…
The biochem. processing of a wide variety of gasses including, H_2, N_2, CO_2, CO and NO_x requires complex machinery. Anaerobic metalloenzymes are highly specialized in such transformations, and often employ multi-metal cooperativity. A bio-inspired approach to tackle energy related problems involving CO_2 and N_2, f…
Electrochromic smart windows modulate their optical transparency in response to a small voltage, and are employed to tailor lighting conditions within a structure with the potential of significant energy savings.The two bottlenecks preventing wide spread implementation of electrochromic windows are cost and performanc…
Mixed transition metal oxides are central to the development of materials for oxygen evolution reaction, oxygen redn. reaction, and energy storage. Discreet clusters contg. mixed transition metal-oxido moiety were targeted. A series of heterometallic trimanganese-tetraoxido cubanes (M'Mn_3O_4) supported by a trisalkox…
University of Minnesota Ph.D. dissertation. August 2014. Major: Chemical Engineering. Advisors: Eray S. Aydil, David J. Norris. 1 dcomputer file (PDF); xxiii, 158 pages.
Levitation applications of superconductors require the fabrication of bulk ceramic superconductors with special shapes. The conventional hydraulic pressing is not suitable for the production of superconductors with complicated forms, so we have applied slip casting to shape bulk superconductors. Superconducting powder…
A series of 28 square-planar dithiol(diimine)platinum(II) chromophoric complexes have been synthesized, characterized, and evaluated for potential efficacy in sensitization of solid state photovoltaic devices to the near-infrared regions of the electromagnetic spectrum. The effect of molecular stacking in the solid st…
Powder energetic materials are highly sensitive to electrostatic discharge (ESD) ignition. This study shows that small concentrations of carbon nanotubes (CNT) added to the highly reactive mixture of aluminum and copper oxide (Al + CuO) significantly reduces ESD ignition sensitivity. CNT act as a conduit for electric…
Ammonia borane (AB, NH_3BH_3) and substituted amine borane adducts (NR_3BH_3) have received considerable interest as both promising modes of chem. hydrogen storage (up to 19.6 % for AB) and as precursors to inorg. B-N-contg. materials. Though numerous methods for the dehydrocoupling of AB are known, homogeneous transi…
The equation of state (EOS) for hard-sphere fluid derived from compressibility routes of Percus-Yevick theory (PYC) is extended. The two parameters are determined by fitting well-known virial coefficients of pure fluid. The extended cubic EOS can be directly extended to multi-component mixtures, merely demanding the E…
Voronoi diagrams are powerful for solving spatial problems among particles with different sizes.Voronoi diagram of atoms has proven its power for solving various fields of different disciplines, particularly molecular biology/material science problems, in an unified framework. Beta-complex is a generalization of alpha…
α,ω-Aminopropylpolydimethylsiloxane을 bisphenol-A diglycidyl ether (DGEBA)계 이관능성 에폭시 수지와 반응시켜 polydimethylsiloxane(PDMS)의 양 말단에 에폭시가 도입된 실리콘 변성 에폭시 수지(EMPDMS)를 제조한 다음 alkylesteraminopropylalkoxy silane (XD 5607)을 반응시켜 PDMS가 도입된 에폭시 hybrid 화합물(EMPDMSH)을 제조하고 이를FT-IR, 1H-NMR 및 29Si-NMR로 구조를 확인하였다. EMPDMSH base 수지에 용매를 혼합…
Aerogels are suitable to be used as thermal insulation material for example in vehicles or in building construction as they are highly porous (up to 99%), nanostructured and therefore have a low density (0.01-0.3 g/cm³) and a low thermal conductivity (< 0.03 W/m.K). In order to improve the handling we fixed highly ins…
لاتکس پایدار نانوکامپوزیت کوپلیمر (استایرن- متیل متاکریلات)/ خاک رس به روش پلیمریزاسیون رادیکالی انتقال اتم معکوس در سیستم مینیامولسیونی و در دمای C° 90 سنتز شد. پلیمریزاسیون مینیامولسیونی به جهت فواید فراوان آن در کپسوله کردن مواد معدنی، سهولت فرآیند هستهزایی، و حذف حلالهای آلی مورد استفاده قرار گرفت. درجه تبدیل…
Comprehensive simulations are employed to study the interaction between Laguerre-Gaussian (LG) beams and chiral clusters made of silicon nano-spheres. It is demonstrated that the scattering process is strongly dependent on the orbital and spin angular momentum carried by the LG beams, an effect explained by the select…
Silicon-based solar cell is a type of solar cell that is widely used today. Although these solar cells are now dominated by silicon material, high production cost difficult fabrication process become one of the obstacles. Besides that, the conventional type of silicon solar cells has a limited supply of silicon raw ma…