Materials Literature
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Graphene has remarkable mechanical properties, which makes it potentially a good reinforcement in ceramic composites. It also has unique electrical and thermal properties, which makes it an attractive filler for producing multifunctional ceramics for a wide range of applications. In the past few years, relatively litt…
Prepared by the Committee on Minimum Design Loads for Buildings and Other Structures of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCE
A highly flexible graphene free-standing film with hierarchical structure is prepared by a facile template method. With a porous structure, the film can be easily bent and cut, and forms a composite with another material as a scaffold. The 3D graphene film exhibits excellent rate capability and its capacitance is furt…
Half-Heusler thermoelectric materials have been attracting extensive research interest over the last two decades. In this mini-review article, we summarize the synthesis methods for optimizing individual parameters to enhance the thermoelectric performance in both MNiSn ( n -type) and MCoSb ( p -type) based half-Heusl…
Oil/water separation is an important field, not only for scientific research but also for practical applications aiming to resolve industrial oily wastewater and oil-spill pollution, as well as environmental protection. Recently, research into the role of special wettability for oil/water separation has attracted much…
Controlling the bandstructure through local-strain engineering is an exciting avenue for tailoring optoelectronic properties of materials at the nanoscale. Atomically thin materials are particularly well-suited for this purpose because they can withstand extreme nonhomogeneous deformations before rupture. Here, we stu…
The ion pairs described in this chapter consist in a charged potentially-fluorescent dye, associated with a spectroscopically-silent organic counter-ion. Their combination with the novel AIE phenomenon provides a few distinct advantages, particularly in terms of sensitivity and selectivity. Such systems are highly ver…
콜라겐 함유량이 높은 한식메뉴에 대한 미생물학적 위해 평가를 위해 S. aureus와 Salmonella를 삼계탕, 어글탕, 오돌뼈 볶음, 전약, 족발에 접종하여 다양한 저장온도에서 세균수를 관찰하였다. <TEX>$4^{\circ}C$</TEX>의 저장온도에서는 5가지 콜라겐 함유식품에서 세균의 성장이 관찰되지 않았고, <TEX>$10^{\circ}C$</TEX>의 경우 삼계탕과 족발이 다른 식품에 비해 세균이 생장하는 패턴을 나타냈다. 저장온도 <TEX>$20^{\circ}C$</TEX>에서는 전약을 제외한 나머지 식품에서 세균이 생장하였고, <TEX>$30^{\…
Lead-based stabilisers, such as lead sulphate and lead stearate, currently used in the processing of polyvinylchloride (PVC) products are being substituted with more environmentally safe, economically viable and higher quality materials. This study aimed to use hydrotalcites (HTs), which are environmentally non-hazard…
We have studied Hall effect for potassium (K)-doped <TEX>$BaFe_2As_2$</TEX> superconducting thin films by analyzing the relation between the longitudinal resistivity (<TEX>${\rho}_{xx}$</TEX>) and the Hall resistivity (<TEX>${\rho}_{xy}$</TEX>). The thin films used in this study were fabricated on <TEX>$Al_2O_3$</TEX>…
Sub-micron diffraction gratings have been used for two LED illumination applications. One is to create a transparent see through luminaire which can be used to illuminate and read a paper document or e-book. A second is a light sensor that can be used in a feedback loop to control a multicolor LED lamp. Optical design…
The effect of aluminum doping on the growth of ZnO films on c-plane ZnO (0001) single crystal substrates during metalorganic chemical vapor deposition was investigated. It was found that aluminum doping induces a growth mode of three-dimensional columnar growth. X-ray photoemission spectroscopy demonstrates that parti…
Restricted molecular rotation of aggregation-induced emission (AIE)-active luminogens reduced the possibility of nonradiative decay pathways, leading to enhanced emission in solution aggregates and solid films. Strategies used to impose restricted molecular rotation are beneficial for the emission enhancement of AIE-a…
Reactions of thiol with the C 3-vinyl group of various chlorophyll (Chl) derivatives were examined. The reactions resemble thiol-olefin co-oxidation, except that the vinyl C = C double bond was cleaved to afford a formyl group without any transition metal catalyst, and that the simple anti-Markovnikov adduct of thiol…
The possibility of using silsesquioxanes (POSS) as nanofillers or modifying additives to elastomers: methylvinylsilicone (MVQ) and hydrogenated butadiene-acrylonitrile (HNBR) rubber was studied. It was found that suitably functionalized silsesquioxanes can take part in the cross-linking of rubbers and increase their m…
본 연구의 주요 목적은 신발 겉창 재료로 사용하기 위하여 열가소성 폴리우레탄 (TPU)의 내마모성과 습윤시의 내슬립성을 에틸렌-프로필렌-디엔 고무 (EPDM) 또는 폴리부타디엔 고무 (BR)를 블렌드하여 향상시키는 것이다. 10 wt%의 EPDM 또는 BR이 TPU에 투입되었을 때 TPU/EPDM과 TPU/BR 블렌드는 TPU보다 우수한 NBS 내마모도, 인장 물성 그리고 습윤 내슬립성을 보였다. 10 wt% 이상 투입될 때는 내마모도와 인장 물성 모두 감소하였다. 10 wt% 투입시의 내마모도와 인장물성 상승은 TPU의 상분리도 증가에 기인하는 것으로 보인다. T…
Finite-difference time-domain methods are increasingly being used to develop, model and analyze the response of materials, including engineered metamaterials that may contain superconductors. Though simple and useful expressions for the time-domain susceptibility exist for basic metals and dielectrics, the time-domain…
Segmental urethane elastomers with built-in chemically reactive nanofiller (propanediolsiloxy-POSS) were prepared by a two-stage (prepolymer) method. The first stage involved bulk-polyaddition reaction of 4,4'-diphenylmethane diisocyanate (MDI, rigid segments) containing the incorporated POSS nanofiller, with poly(oxy…
Transparent beta-SiC is of great interest because its high strength, low coefficient of thermal expansion, very high thermal conductivity, and cubic crystal structure give it a very high thermal shock resistance. A transparent, polycrystalline beta-SiC window will find applications in armor, hypersonic missiles, and t…
Self-assembly of vertically aligned nanocomposite films via spinodal decomposition is of potential interest in a range of technique applications. How the elastic interaction mediated by modulus mismatch, cubic anisotropy factor, and anisotropic lattice mismatch between the product phases facilitates the experimentally…