Materials Literature
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Cellulose and lignocellulose have great potential as nanomaterials because they are abundant, renewable, have a nanofibrillar structure, can be made multi¬functional and self-assemble into well-defined architectures. New methods for liberating these materials, including nanodimensional cellulose fibrils, macromolecule…
Nanostructured porous silicon (nanoPS) basically consists in a network of silicon nanocrystals with high specific surface. Its intrinsic high surface reactivity makes nanoPS a very suitable material for the development of biosensors. In this work, the surface of nanoPS was functionalized by the use of (3-aminopropyl)t…
Clusters of EuS nanocrystals formed through the thermal assembly of 2.5 nm nanocrystal monomers by varying the annealing temperature from 300 to 340 °C. Below 310 °C, oleate ligands stabilized on the surface of the EuS nanocrystals, giving rise to their low solubility in triethanolamine while facilitating monomer–mono…
The effect of electron beam (EB) irradiation on the optical properties of cadmium chloride (CdCl 2 )-doped polyethylene oxide (PEO) is studied. The films are characterized using Fourier transform infrared spectroscopy (FTIR) in KBr medium. The morphology study of the films is conducted using a scanning electron micros…
Nanoscale Gold colloidal dimers are built thanks to the convective capillary force assembly (CFA) technique. CFA efficiently demonstrates precise dimer localization, particle separation control, and object reproducibility. Darkfield microspectroscopy measurements combined with numerical modeling exhibit a redshift in…
The preparation and characterization of Schottky contacts on differently grown n-type ZnO crystals was studied. We demonstrate that depending on the crystal growth process different procedures of surface treatment should be used to achieve good Schottky contacts. A treatment in a dc-hydrogen plasma enables us to fabri…
La 0.8 Ca 0.2 MnO 3 (LCMO) thin films have been epitaxially grown on ferroelectric 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 (PMN-PT) substrates. The substrate-induced strain effects on the transport and photoinduced demagnetization in LCMO films were investigated. The photoinduced resistances (PRs) of LCMO systematically chang…
Low molecular weight gelators are an important class of molecules. The supramolecular gels formed by carbohydrate derived low molecular weight gelators are interesting soft materials that show great potential for many applications. Previously, we have synthesized a series of methyl 4,6-O-benzylidene-α-D-glucopyranosid…
We investigate theoretically the transmission properties through a p-n-p junction on graphene. Here, we show that the electronic transport property presents deep analogies with light propagation. It originates from the similarity between the linear spectra of the Dirac fermions and photons that obey the Maxwell’s equa…
Abstract Environmentally benign‐solvent free plasma process is employed to produce nanostructured PFDA‐ co ‐DEGDME amphiphilic coatings via plasma co‐polymerisation of 1 H ,1 H ,2 H ,2 H ‐perfluorodecyl acrylate (PFDA) and diethyleneglycol dimethyl ether (DEGDME) precursors in a low pressure‐RF‐inductively excited tub…
The synthesis of dodecasubstituted porphycenes has not been reported, to date. Herein, the preparation of tetramethyloctaethylporphycene by a McMurry-type coupling of 3,3',4,4'-tetraethyl-5,5'-diformyl-2,2'-bipyrrole was attempted at first, but dodecasubstituted porphycene was not successfully obtained and only pyrrol…
Preparation of a liquid-crystalline ionic-liquid (IL)-based interpenetrating polymer network (IPN) is described. The IPN is prepared sequentially by first photopolymerizing a self-assembled aqueous mixture of an IL monomer (1-(10-(acryloyloxy)decyl)-3-methylimidazolium chloride) that possesses an acryloyl moiety at th…
Electron spin resonance study of unzipped graphene nanoribbons (GNRs) reveals a specific carbon-related signal, denoted GC, at g=2.0032, attributed to GNRs periphery centers. The signal is observed to be readily quenched upon O2 adsorption, which appears to be fully reversible upon room temperature vacuum treatment. I…
Articular cartilage has limited repair and regeneration potential, and the scarcity of treatment modalities has motivated attempts to engineer cartilage tissue constructs. The use of chondrocytes in cartilage tissue engineering has been restricted by the limited availability of these cells, their intrinsic tendency to…
This research was conducted to evaluate the potential of sugar palm residue as a raw material to produce the new green composites. The physical properties of sugar palm fibre reinforced unsaturated polyester composites from different part which are sugar palm frond (SPF/PE), sugar palm bunch (SPB/PE), sugar palm trunk…
The sorption properties of a 3D graphene were measured for a number of gases and water vapor. The N 2 and H 2 isotherms were measured at (77 and 87) K, respectively, while the CO 2 and water vapor isotherms were measured at (273 and 293) K, respectively. The data could be used for characterization and molecular simula…
HMX (cyclotetramethylene tetranitramine) was coated with NTO (3-nitro-1,2,4-triazole-5-one) by solution crystallization. Two-step coating crystallization was investigated to enhance coating morphology. The first coating process using HMX seed and the second coating process using HMX coated with NTO obtained from the f…
The negatively charged nitrogen-vacancy (NV) defect (NV center) in diamond is a leading candidate to realize solid-state qubits and ultrasensitive magnetometers in ambient conditions. A new interpretation of some of the properties of the center is presented. We show that the double peak in the absorption phonon sideba…
By incorporating nanoinclusions (carbon nanotubes, graphene sheets) with exceptional thermal conductivity into a polymer matrix, one would expect to improve the heat performance of resulting nanocomposites. However, the effective thermal conductivity of carbon-based nanocomposites is strongly influenced by the Kapitza…
Kenaf bast fiber was chemically modified by using propionic and succinic anhydrides. Five retention times were compared: 30, 60, 120, 180, and 240 minutes at 100°C. Confirmation of anhydride modification was established by the weight percent gain (WPG) and was further confirmed by Fourier Transform Infra-Red (FT-IR) s…