Materials Literature
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The transportation sector is the biggest contributor to air pollution in Indonesia, especially in metropolitan cities. Gases such as oxides of nitrogen (NOx) are produced during the combustion of fossil fuels in the internal combustion of vehicle engines. Oxides of nitrogen such as nitric oxide (NO) and nitrogen dioxi…
Abstract Analyzing and modeling methods for warpages including cylindrical deformations are discussed in large-area dies with redistribution layers (RDLs) and thin 50-µm-thick Si substrates. The buckling behavior of warpage, a deformation transition from spherical to cylindrical, strongly depends on the lateral sizes…
The ferroelectric and piezoelectric properties of (1−x)Bi0.5(Na0.8-K0.2)0.5TiO3-xBaZn0.5W0.5O3 ((1−x)BNKT-xBZW) ceramics have been studied to clarify the temperature dependence of the polarization-electric field (P-E) hysteresis and dielectric properties. Based on the temperature dependence of the dielectric constant,…
From the [001] grown Sr2FeMoO6 double perovskite (SFMO) it was excised a slab with (001) free surfaces and half c wide. A supercell was constructed with that slab, leaving a 10 Å vacuum region along the [001] direction, in such a way that it is possible to deal with the slab as an insulated system. After the correspon…
The aim of this study is to verify through tensile, hardness and metallography tests the influence of heat treatments of martempering, quenching in brine, normalizing and annealing in the mechanical properties and in the microstructure of the SAE 1045 steel. The results found an alteration in microstructural compositi…
The wide applications of Bisphenol A (BPA) in food and packaging industry have increased the exposure and risk of this chemical towards the human population with its endocrine disrupting effects. BPA is
나노실리카 표면을 아크릴레이트로 개질한 후 이를 상업용 아크릴레이트 하드코팅액에 첨가하여 유무기하이브리드 하드 코팅액을 제조하고 UV 경화에 의하여 PET 필름에 코팅한 후 도막의 물성을 살펴보았다. FTIR 실험결과, 나노실리카 표면의 하이드록실기 감소를 확인하여 하이드록실기가 아크릴레이트로 치환되었음을 알았다. 아크릴레이트 하드 코팅액과 아크릴레이트로 개질된 나노실리카의 유무기하이브리드 UV 경화에 의하여 표면 연필경도와 내마모성 증가를 확인하였으며, 또한 개질된 나노실리카 첨가는 광투과 특성에는 영향을 미치지 않는 반면, 표면거칠기 증가에 따른 광산란에 의하여…
¹H NMR 분석방법을 이용하여 여러가지 가열 조건하에서 폴리카보네이트/폴리(부틸렌 테레프탈레이트) (PC/PBT) 블렌드의 에스테르 교환반응 속도에 관하여 조사하였다. 일반적으로 고분자 배합비를 산출하는데 사용하는 TGA 측정 과정에서, PBT의 열분해 온도에 이르기 전에 교환반응이 매우 활발히 일어난다는 것을 확인하였으며, 이에 따라 상대적으로 높은 열분해 온도를 가지는 PC의 함량이 원래 혼합된 것보다 적은 것처럼 관측된다는 것을 알았다. 200, 250, 300℃에서 가열시간을 증가시키면서 PC/PBT(50:50 wt%) 블렌드와 분말 혼합물의 에스테르 교환…
In order to arrange directionally, multi-wall carbon nanotubes (MWCNTs) are functionalized with ferromagnetic cobalt on the surface via the electroless plating method. The uniform and continuous cobalt coating was received in pH [Formula: see text] 9 at 45[Formula: see text]C for 30[Formula: see text]min. It is found…
The method of induction centrifugal surfacing of a charge based on tin bronze powders of medium dispersion with the addition of finely dispersed boehmite, which is an intermediate product in the production of the nanodispersed modification agent (α-Al2O3), is described. Its characteristic feature is that it can be pro…
The effects of heat treatment on the phase transformations of lead zirconate titanate Pb(Zr0.50Ti0.50)O3 (PZT) thin films were studied. The pyrolysis temperature directly affected the densification, residual stresses, and suppression of the pyrochlore phase observed in the studied films. The evolution of the crystalli…
In this paper, an accurate and efficient algebraic technique is used to compute linear tetra-atomic molecules stretching and bending vibration modes. Namely, several collective energy levels of linear XYYX molecules N[Formula: see text]C[Formula: see text]C[Formula: see text]N[Formula: see text] and N[Formula: see tex…
Scrophularia ningpoensis hemsl has been traditionally used in China and Vietnam for treatment of bacteria, atopy, pimple, tonsillitis, angina and encephalitis for a long time. The main objectives of this study were to evaluate the antibacterial activity of the Scrophularia ningpoensis hemsl extract on biofilm formatio…
Abstract In this paper, we describe the use of a simple and efficient sol–gel solution method for synthesizing indium zinc oxide (IZO) films for use as semiconductor channel layers in thin-film transistors (TFTs) on p-type silicon substrates. The performance of IZO-based TFTs was investigated, and the effect of oxygen…
Abstract Incompatibility between hydrophilic chitosan (CS) fiber and hydrophobic polymer matrices leads to unsatisfactory properties of the composites. The crystallization of polymer on the fiber surface is a promising way to increase interfacial interactions. Here, we coated CS fiber surfaces with graphene oxide via…
Semiconductor gas sensors based on metal oxide are widely used in a number of applications, from health and safety to energy efficiency and emission control. Nanomaterials including nanowires, nanorods, and nanoparticles have dominated the research focus in this field owing to their large number of surface sites that…
We report high photovoltaic performance of a novel donor-acceptor (D-A) conjugated polymer poly[2,6[4,8-bis(2-ethyl-hexyl)benzo[1,2-b;4,5-b']dithiophene-co-2,5-thiophene-co-4,7[5,6-bis-octyloxy-benzo[1,2,5]thiadiazole]-co-2,5-thiophene] (PBDTTBTZT) in bulk heterojunctions with [6,6]-phenyl-C71-butyric acid methyl este…
We described the fabrication of functional and microstructured surfaces from polymer blends by spray deposition. This simple technique offers the possibility to simultaneously finely tune the microstructure as well as the surface chemical composition. Whereas at lower polymer concentration, randomly distributed surfac…
To capture various experimental results in the pseudogap regime of the underdoped cuprate superconductors for temperature $T<{T}^{*}$, we propose a four-component pair density wave (PDW) state, in which all components compete with each other. Without random field disorders (RFD), only one of the PDW components survive…
We have extended the momentum-dependent local-ansatz (MLA) wavefunction method to the first-principles version using the tight-binding LDA+U Hamiltonian for the description of correlated electrons in the real system. The MLA reduces to the Rayleigh-Schr\"odinger perturbation theory in the weak correlation limit, and d…