Materials Literature
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This chapter discusses the basic principles of scanning electron microscopy (SEM) and scanning helium ion microscopy (HeIM) and their application to nanoscale imaging and microanalysis. Different modes of imaging and their advantages for the examination of nanostructures are explained. A review of microscope design is…
Quantum-chemical computations of nuclear quadrupole-coupling parameters for 24 open-shell states of small molecules based on non-relativistic and spin-free exact two-component (SFX2C) relativistic equation-of-motion coupled-cluster (EOM-CC) as well as spin-orbital-based restricted open-shell Hartree-Fock coupled-clust…
The absorption model plays an important role in the design of the microbolometer structure regarding the determination of the optimum thickness of the structure layers. Moreover, the infrared absorption depends on the wavelength of the radiation and the material properties. In this paper, we presented an Infrared abso…
Two kinds of multiwalled carbon nanotubes/silica nanohybrids (CNTs/SiO 2 ) were synthesized via a sol–gel method by coating SiO 2 on the surfaces of CNTs that had been functionalized with poly(sodium- p-styrenesulfonate) (PSS). The influence of the nanohybrids on the thermal properties of poly(vinyl alcohol) (PVA) and…
The Advanced Gas Cooled Reactor (AGR) fleet operated by EDF Energy in the UK are a unique example of high temperature civil nuclear plant that has operated commercially over significant timescales.AGR plant contain a graphite core with carbon dioxide used as the primary coolant and importantly key metallic boiler, rea…
The graphite bricks in an advanced gas-cooled reactor (AGR) core are subject to fast neutron irradiation which leads to significant dimensional and material properties changes. These changes vary across the relatively thick (~100mm) wall section of a typical graphite moderator brick due to the fluence and temperature…
이 연구에서는 메틸렌피페라지노메틸-비스-포스폰산 금속염( $PIPEABPM^{n+}$ )과 메틸렌피페라지노메틸-비스-포스폰산(PIPEABP)으로 처리된 리기다 소나무의 연소성을 시험하였다. 15 wt%의 메틸렌피페라지노메틸-비스-포스폰산 금속염과 메틸렌피페라지노메틸-비스-포스폰산 수용액으로 각각 리기다 소나무에 3회 붓칠하여 실온에서 건조시킨 후, 콘칼로리미터(ISO 5660-1)를 이용하여 연소성을 시험하였다. 그 결과, 메틸렌피페라지노메틸-비스-포스폰산 금속염으로 처리한 시험편은 메틸렌피페라지노메틸-비스-포스폰산을 처리한 시험편에 비해 최대질량감소율( $MLR_…
This paper presents the development of the friction-type Eradi-Quake System (EQS) for APR 1400 NPP.Consisting of a sliding bearing assembly with damping and mass energy regulator spring, EQS is the seismic isolation system to be applied widely to industrial facilities.For the nuclear power plant structure, the seismic…
Carbon Nanotubes (CNTs) chemistry is under constant evolution, as a consequence of the deep interest of the scientific community in finding new applications for these versatile materials. New and old synthetic protocols are used for improving the control of the functionalization degree of the final materials and for o…
An infrared detector is proposed that is based on a ferroelectric tunnel junction (FTJ) working under bolometer-like principles. Electron tunneling, either direct or indirect, through the ferroelectric barrier depends on the temperature of the devices. During tunneling, infrared radiation alters the polarization of th…
A scanning transmission electron microscope equipped with a backscattered and secondary electron detector is shown capable to image graphene and hexagonal boron nitride monolayers. Secondary electron contrasts of the two lightest monolayer materials are clearly distinguished from the vacuum level. A signal difference…
We report on two-dimensional (2D) numerical simulations of photoresponse characteristics for GaN based p-i-n ultraviolet (UV) photodetectors. Effects of doping density of p-GaN layer on the photoresponse have been investigated. In order to accurately simulate the device performance, the theoretical calculation include…
Abstract The properties of many functional materials depend critically on the spatial distribution of an active phase within a support. In the case of solid catalysts, controlling the spatial distribution of metal (oxide) nanoparticles at the mesoscopic scale offers new strategies to tune their performance and enhance…
Background: Molluscan larval ontogeny is a highly conserved process comprising three principal developmental stages; trochophore, veliger and metamorphosis into the juvenile. A characteristic that is unique to each of these stages is shell design, termed prodissoconch I, prodissoconch II and dissoconch in bivalves. Th…
Polyurethane composites were obtained in the reaction of HDI or HMDI diisocyanate, polycaprolactone diol and 1,4-butanediol in 1,4-dioxane solution containing dispersed hydroxyapatite. The distribution of hydroxyapatite particles in the polymer matrix has been examined using SEM-EDX method. By applying DSC, TOPEM DSC…
Potential competition between fringed-micelle nucleation (N1) and folded-chain nucleation (N2) widely exists in strain-induced crystallization (SIC). However, during uniaxial deformation, no in situ observational evidence of nucleation transition from N2 to N1 in SIC of natural rubber (NR) has been reported yet. In th…
Styrene Butadiene Rubber composites with mixture of carbon nanotube and thermally reduced graphene were prepared and morphological, mechanical and dielectric properties of the composites were studied. Aim of this study is to understand the dispersion and reinforcement behaviour of hybrid filler in rubber matrix. Impro…
Melting behavior in thin films of linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE) was studied by local thermal analysis (µTA). Even in the films thinner than 100 nm, the melting temperature ( T m ) was successfully observed by µTA. For LLDPE, T m decreased as the thickness became thinner t…
ABSTRACT Polymers bearing pendant vinyl groups have attracted significant attraction because they can be further modified for required applications, but their syntheses are still a big challenge. Herein, allyl methacrylate was catalyzed using a phosphazene base to homopolymerize or copolymerize with 2‐(N, N‐dimethylam…
We study spin-dependent transport in a two-dimensional graphene structure with Rashba spin–orbit interaction and spatially-varying Fermi velocity. The numerical results show that the spin precession and Brewster-like angle induced by the Rashba spin–orbit interaction can be tuned efficiently by the Fermi velocity. Cha…