Materials Literature
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In the present investigation, the crystallization and phase transition behaviours of normal alkane (n-docosane) in microcapsules with a mean diameter of 3.6 μm were studied by the combination of differential scanning calorimetry (DSC), temperature-dependent X-ray diffraction (XRD) and variable-temperature solid-state…
In this study, multilayers from polyethylene imine, heparin and chitosan are prepared at three different pH values of 5, 7 and 9. Water contact angle and quartz microbalance measurements show that resulting multilayers differ in terms of wetting behaviour, layer mass and mechanical properties. The multilayer is then f…
This paper is a review article covering various methods reported on synthesis of ?-SiAlON based ceramic materials and on their net-shape consolidation into radome structures. It also identifies a composition out of a wide-range ?-Si6-zAlzOzN8-z (where z = 0-4.1) solid solution suitable for radome applications and disc…
Eight inorganic-organic hybrid compounds with a formula of [R-Bz-1-APy][PbI(3)] (R-Bz-1-APy(+) = mono-substituted benzylidene-1-aminopyridinium Schiff base derivative; R = m-CN (1), m-CH(3) (2), H (3), p-F (4), p-Cl (5), p-Br (6), o-Cl (7), o-Br (8)) have been synthesized and characterized structurally. The common cha…
Poly(3-hydroxybutyrate) (PHB) is a natural biopolyester accumulated in microbial cells as tiny amorphous granules. The nano- micro-particles have a variety of potential applications and behave differently in different environments. In this work, the in situ crystallization of native PHB granules was investigated under…
Sensorial comfort, usually described as “fabric hand or feel”, is the sensation of how the fabric feels when it is worn next to the skin. This feeling deals with properties of the fabric such as prickling, itching, stiffness or smoothness. It can also be related to its attributes related to physiological comfort, as f…
This paper presents a new process for synthesizing a kind of nitrogen- doped carbon nanotubes (N-CNTs) with primarily a ‘graphite-like’ structure at N substitutions from flames using n-propylamine and n-butylamine as fuels. When the N-CNTs are used as the supercapacitor electrode materials, they exhibit a much larger…
Active, or microporous, carbons are established and effective adsorbents for toxic and other organic vapour-phase compounds. Their porosity results predominantly from slit-shaped pores of molecular dimensions (and hence widths < 2 nm) formed by spaces between graphene layers in a turbostratic structure. They are used…
Oxygen deficient gallium oxide films have been grown by pulsed-laser deposition. Depending on the growth conditions (oxygen pressure and laser power density), amorphous and insulating or partially crystalline and conducting gallium oxide films can be obtained. For very large oxygen deficiencies (Ga2O2.3), the oxide is…
Cryogenic deep rolling of metastable austenites is a new approach to achieve martensitic surface hardening of steel components. By combination of thermal and mechanical loads, more stable microstructures can be applied in the alternative heat-treatment-free production line referred to as cold surface hardening. Subseq…
Preisach model is a well‐known hysteresis identification method in which the hysteresis is modeled by linear combination of hysteresis operators. Although Preisach model describes the main features of system with hysteresis behavior, due to its rigorous numerical nature, it is not convenient to use in real‐time contro…
Au nanoparticles (NPs) forming a Au shell are coated on the surfaces of Ni microparticles (MPs) through a simple redox-transmetalation reaction, forming Ni/Au core-shell MPs. Then Au hollow spheres (HSs) are prepared by etching the Ni core in 1 mol L(-1) HCl solution. Surface-enhanced Raman scattering (SERS) spectrosc…
Titanium nitride (TiN) nanoparticles were obtained by calcining nanotubular titanic acid (NTA) in flowing ammonia. The morphology, crystal structure, and chemical features of as-prepared products were investigated by means of transmission electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, an…
Designing and building a full scale hydrogen storage system revealed several engineering challenges and also demonstrated the capabilities of complex hydrides. Three kg of hydrogen was stored in a four module system using modified sodium alanate as the storage media. Extensive testing of this system demonstrated the a…
The low temperature growth of crystalline PbS films has been achieved on plastic substrates by CVD using a xanthate. The possible mechanism involved in this low temperature deposition has been probed by density functional theory calculations.
Understanding detailed electric near-field distributions around noble metal nanostructures is crucial to the rational design of metallic substrates for maximizing surface-enhanced Raman scattering (SERS) efficiency. We obtain SERS signals from specific regions such as the ends, the sides and the entire surfaces of gol…
We have successfully prepared three crystalline conjugated rod–coil diblock copolymers of poly[2,7-(9,9-dihexylfluorene)]-block-poly(stearyl acrylate) (PF-b-PSA), PF7-b-PSA64, PF7-b-PSA93, and PF7-b-PSA166, via the combination of a Suzuki coupling reaction and atom transfer radical polymerization. The crystalline comb…
The structure of laser glasses in the system (Y(2)O(3))(0.2){(Al(2)O(3))(x))(B(2)O(3))(0.8-x)} (0.15 ≤ x ≤ 0.40) has been investigated by means of (11)B, (27)Al, and (89)Y solid state NMR as well as electron spin echo envelope modulation (ESEEM) of Yb-doped samples. The latter technique has been applied for the first…
Eu 3+ doped YBa 3 (PO 4 ) 3 series were successfully synthesized by conventional solid state reaction and their luminescence properties were investigated. The excitation spectra suggested that YBa 3 (PO 4 ) 3 :xEu 3+ presented a strong absorption in near-ultraviolet region. Under 393 nm excitation, YBa 3 (PO 4 ) 3 :xE…
Diphenylalanine, a key building block for organic nanotechnology, forms discrete, rigid and hollow nanotubes that are assembled spontaneously upon their dilution from organic phase into aqueous solution. Here we report the efficient preparation of several S-linked glycosylated diphenylalanine analogues bearing differe…