Materials Literature
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We report for the first time a new single-walled carbon nanotube (SWNT)-induced lyotropic phase behavior of a F108 block copolymer/water system. As the concentration is increased by evaporation, the F108-SWNT/water system exhibits isotropic–hexagonal–FCC–BCC–lamellar transitions. This is in clear contrast with the F10…
The one-pot synthesis of 4,8-dibromobenzo[1,2-d;4,5-d']bistriazole, followed by alkylation and Stille coupling to yield three different isomeric derivatives with markedly different optoelectronic properties, is reported. These derivatives show potential as new units in organic oligomers and polymers for electronics ap…
We present evidence of a mechanism for the indirect excitation of Er${}^{3+}$ ions in a SiO${}_{2}$ matrix sensitized with Si quantum dots (SiQDs). The proposed process enables the simultaneous and rapid excitation of two proximal Er${}^{3+}$ ions upon absorption of a single high-energy photon in a SiQD. The experimen…
A nondestructive method is reported to measure the high‐temperature modulus of 3C‐SiC coating and bulk samples using Raman scattering. Within the temperature range from 20 °C to 900 °C, both the longitudinal optical and transverse optical phonon frequencies decrease linearly as the temperature increases. The elastic m…
The graphene nanoribbon field effect transistors (GNRFET) suffer from band-to-band tunnelling (BTBT), which in turn causes ambipolar conduction. In this simulation study, we propose a step–linear doping profile for the graphene nanoribbon near the source and drain contacts. This type of doping profile suppresses the B…
Antireflective subwavelength structures (ARS) resembling nanostructures found on the cornea of night-active insects reduce the reflection of light by providing a gradual change in the refractive index at the interface. These artificial ARS have mainly been fabricated by a combination of conventional lithography and re…
A novel class of six different triaryl pyridine N-glycosylamine amphiphiles was synthesised and characterized based on different spectral techniques, such as NMR and mass analysis. Gelation properties in different aromatic and aliphatic solvents were studied and gelation was observed predominantly in aliphatic solvent…
The temperature-induced phase transition of native cellulose was studied by X-ray diffraction and molecular dynamics (MD) simulation. Upon heating, this transition is characterized by an important expansion of the distance between the planes of glucopyranose rings, which is observed both experimentally and in MD. Comp…
Multi‐wall carbon nanotubes (MWCNTs) produced by the arc discharge between two graphite rods in liquid nitrogen have been investigated with the use of Raman spectroscopy and transmission electron microscopy (TEM). The effects of the applied voltage on the structural properties of the produced MWCNTs have been observed…
Stress development during co‐firing a multilayer dielectric material of Bi 2 ( Zn 1/3 Nb 2/3 ) 2 O 7 ( BZN ) and magnetic material of ( Ni 0.3 Cu 0.1 Zn 0.6 O )‐( Fe 2 O 3 ) 0.8 ( NiCuZn ferrite) laminate has been investigated by measuring camber development and shrinkage rate difference. The trend of camber developme…
The ever-increasing interest in nanostructured materials and shrinking dimensions of state-of-the-art devices pose new challenges both in synthesis and metrology. Although an extensive range of nanotubular materials of different compositions and for various applications are reported in the literature, often detailed s…
Abstract The trap structure of polyimide was studied using open‐circuit thermally stimulated discharge current (TSDC). TSDC was observed in 25‐μm thin film of polyimide at different condition of polarizing field and temperature. The one‐sided vacuum‐aluminized samples were used to record the open‐circuit thermally sti…
A series of novel photo-crosslinkable fluorinated poly(phthalazinone ether)s containing 1,1-diphenylethylene segments in the polymer main chain, used for optical waveguide materials, were synthesized by polycondensation reaction of decafluorobiphenyl with a mixture of 4-(4-hydroxylphenyl)(2H)-phthalazin-1-one (DHPZ),…
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A novel charring agent poly(1,3-propylene terephthalamide) (PPTA) was synthesized and characterized by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance. This novel charring agent combined with ammonium polyphosphate (APP) was adopted as an intumescent flame retardant (IFR) to impart flame reta…
An extensive Raman investigation of few‐layer graphene structures, obtained using a plasma microjet technique, is presented. Raman spectroscopy represents a unique method to characterize specific features of these systems. Excitation energies both in the visible and in the deep ultraviolet range are exploited, allowin…
We have studied and compared the magnetic response of LaFeAsO 0.92 F 0.08 , in the form of granular bulk and powder, to the application of ac magnetic fields with different frequencies. The study of the third harmonics of the ac susceptibility has shown that the ac frequency plays an important role in the electromagne…
We present extensive pseudopotential density functional theory calculations dedicated to analyze the stability and dissociation behavior of NO molecules adsorbed on small nonmagnetic Rh(n)± clusters. Following the experimental work of Anderson et al. (J. Phys. Chem. A 2006, 110, 10992), we consider rhodium structures…
The influence of halogen substituents on the catalytic oxidation of 2,4,6-trihalogenated phenols (TrXPs) by iron(III)-porphyrin/KHSO₅ catalytic systems was investigated. Iron(III)-5,10,15,20-tetrakis(p-hydroxyphenyl)porphyrin (FeTHP) and its supported variants were employed, where the supported catalysts were synthesi…
Abstract A modified starch tannage was synthesized by radical copolymerization of degraded starch and resorcinol (RC) using horseradish peroxidase (HRP)/H 2 O 2 as an initiator. The effects of the degradation degree, system pH value, reaction temperature on the copolymerization, and tanning properties of the graft cop…