Materials Literature
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We have succeeded in enhancing the gas sensitivity of graphene field-effect transistor (FET)-based gas sensors using surface-treated SiO 2 /Si substrates. Graphene FETs on SiO 2 treated with three types of treatment, namely, H 2 annealing, Al 2 O 3 coating, and CF 4 reactive ion etching (CF 4 -RIE), were prepared. Enh…
The electron work function for graphene fragments with pure edges and those functionalized by hydrogen atoms is calculated using the density functional theory method, and the obtained results are used to evaluate the current–voltage (I-V) characteristics of a vertically aligned rectangular graphene sheet. The calculat…
We show that recent spin-wave resonance studies of (Ga,Mn)As thin films performed by Liu et al. [Phys. Rev. B 75, 195220 (2007)] reveal a substantial increase in the in-plane uniaxial anisotropy at the film surface with respect to the bulk value (surface uniaxial anisotropy field ${H}_{2\ensuremath{\parallel}}^{\mathr…
The principal purpose of this work is to develop a new approach to model and predict the fabric shrinkage in denim garments after finishing treatments. This study was carried out on denim blue jeans fabrics of different structures which are transformed into pants. The shrinkage 056 measured at different parts of the p…
Abstract Single‐walled carbon nanotube (SWNT)‐based nanohybrid compositions based on (6,5) chirality‐enriched SWNTs ([(6,5) SWNTs]) and a chiral n‐type polymer ( S ‐PBN(b)‐Ph 4 PDI) that exploits a perylenediimide (PDI)‐containing repeat unit are reported; S ‐PBN(b)‐Ph 4 PDI‐[(6,5) SWNT] superstructures feature a PDI…
The growing demand for thermal imaging sensors and cameras has focused attention on the need for larger volumes of lower cost optics in this infrared region. A major component of the cost of thermal imaging lenses is the germanium content. As<sub>40</sub>Se<sub>60</sub> was developed as a moldable, germanium-free chal…
Titanium oxide–titanium carbide (TiO x C y ) hybrid materials have tunable electronic properties ranging from semiconductive to semimetallic. They can therefore be employed in solar energy conversion applications and as potential substitute for carbon based electrocatalyst supports for use in fuel cells. Understanding…
Electric-field manipulation of coercivity in FePt/Pb(Mg1/3Nb2/3)O3–PbTiO3 heterostructures investigated by anomalous Hall effect measurement, Liu, Mingfeng, Hao, Liang, Jin, Tianli, Cao, Jiangwei, Bai, Jianmin, Wu, Dongping, Wang, Ying, Wei, Fulin
Downconversion (DC) luminescence with emission at about 1000 nm under excitation of 448‐nm light in Ho 3+ /Yb 3+ codoped α‐NaYF 4 single crystal is realized. The crystal was grown by the Bridgman method using KF as an assisting flux in a NaF‐YF 3 system. The energy‐transfer process and quantum cutting (QC) mechanisms…
Dipyrrolylpyrazole (dpp) derivatives possessing an aryl ring at the pyrazole 4-position were synthesized. Upon protonation, modified dpp derivatives formed a variety of assembled structures through complexation with carboxylates, as observed by single-crystal X-ray and synchrotron XRD analyses. In particular, the comp…
Abstract We propose a method to apply amorphous alumina films on the inner surface of glass containers aiming to improve their hydrothermal barrier property. We have carried out alumina deposition on Si substrates as a function of deposition temperature to determine the physico‐chemical properties of the thin film mat…
Aiming to get a better understanding of the growth mechanism during the plasma polymerization process of ethyl lactate, the surface reactivity of ester-bearing fragments has been determined by combining in situ FTIR spectroscopy and XPS measurements. While the plasma density of the reactive ester-bearing fragment decr…
We have investigated the influence of doping with spherical magnetic nanoparticles on the mixture of a bent-core and a calamitic liquid crystal. Results showed a reduction of the critical field of the magnetic Fréedericksz transition by more than a factor of two after the doping. Moreover, we give for the first time e…
Abstract Series of bulk and nanostructured La 0.7 Sr x Ca 0.3− x MnO 3 ( x = 0.10, 0.15, and 0.20) manganites were synthesized and characterized using different techniques. In the series, both the bulk and nanostructured La 0.7 Sr 0.10 Ca 0.20 MnO 3 and La 0.7 Sr 0.20 Ca 0.10 MnO 3 manganites have orthorhombic and rho…
Abstract Cationic gold nanoparticles offer intriguing opportunities as drug carriers and building blocks for self‐assembled systems. Despite major progress on gold nanoparticle research in general, the synthesis of cationic gold particles larger than 5 nm remains a major challenge, although these species would give a…
Superparamagnetic iron oxide nanoparticles (SPIONs) have been produced and used as contrast-enhancing agents in magnetic resonance imaging (MRI) for diagnostic use in a wide range of maladies including cardiovascular, neurological disorders, and cancer. The reasons why these SPIONs are attractive for medical purposes…
Different chemical vapour deposition (CVD) fabrication conditions lead to a wide range of variation in the microstructure and morphologies of carbon nanotubes (CNTs), which actually determine the compressive mechanical properties of CNTs. However, the underlying relationship between the structure/morphology and mechan…
The metalation of meso-tetrakis(pentafluorophenyl)-substituted [26]rubyrin has been explored with Group 9 metal salts (Rh(I) , Co(II) , Ir(III) ), affording a Hückel aromatic [26]rubyrin-bis-Rh(I) complex with a highly curved gable-like structure, a Hückel antiaromatic [24]rubyrin-bis-Co(II) complex that displays intr…
Chemical grafting and pad-dry physical treatment with maleic anhydride (MA) and 2-hydroxyethyl methacrylate (HEMA) were employed to improve the fire resistance of polyamide 66 (PA 66) fabric, respectively. The flammability characterization demonstrated that chemical grafting could improve the antidripping property of…
Polymer binder modification with inorganic nanomaterials (NM) could be a potential and efficient solution to control matrix flammability of polymer concrete (PC) materials without sacrificing other important properties. Occupational exposures can occur all along the life cycle of a NM and "nanoproducts" from research…