Materials Literature
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Polyamide-6,6 (PA66)-functionalized carboxylic multi-walled carbon nanotubes (CMWNTs) were fabricated by in situ polymerization. The composite was melt-spun into fibers. The structures and properties of the PA66-functionalized multi-walled carbon nanotubes (PFNTs) were characterized using transmission electron microsc…
Particleboard is one of the major timber products exported from Peninsular Malaysia. Apparently, the increasing price and lack of supply of rubberwood has forced the particleboard manufacturers to look for new alternative raw material to produce particleboard. Hence, the production of particleboard through mixture of…
In this work, the structure and activity relationship for CO and O(2) adsorption over Au(2) to Au(10) clusters was investigated using density functional theory (DFT) and artificial neural networks as a part of ongoing studies in the literature to understand CO oxidation over gold nanoparticles. The optimum structures…
Strapped porphyrins, designed to bind planar to semiconductor surfaces, were synthesized as model dyes to study the sensitization processes on metal oxide semiconductor nanoparticles surfaces. The strap was added to limit porphyrin-porphyrin stacking and contacts with the semiconductor, while constraining the anchorin…
A modified gold surface that allows photoregulated binding of alpha-chymotrypsin has previously been reported. Here the development of this surface is reported, through the synthesis of a series of trifluoromethyl ketones and alpha-keto esters containing the azobenzene group and a surface attachment group as photoswit…
Abstract A new derivative of the highly charged inorganic Keplerate of the type {pentagon} 12 {linker} 30 ≡ {(Mo)Mo 5 O 21 (H 2 O) 6 } 12 {Mo 2 O 4 (SO 4 )} 30 with the formula (NH 4 ) 28 (NH 2 CHNH 2 ) 6 Gd 3 [{(NH 2 CHNH 2 ) 20 + Gd 3 + (H 2 O) 50 } ⊂ {(Mo VI )Mo VI 5 O 21 (H 2 O) 6 } 12 {Mo V 2 O 4 (SO 4 )} 30 ] ·…
The photochemistry of a series of 9,10-anthraquinones with multiple benzyloxy substituents was investigated. In polar solvent, the expected Blankespoor oxidative cleavage reaction is the major reaction pathway, but in most cases, several minor products were observed. In nonpolar solvents, the abundance of these minor…
We report an experimental and theoretical study of the optical properties of two-dimensional arrays of aluminum nanoparticle in-tandem pairs. Plasmon resonances and effective optical constants of these structures are investigated, and strong magnetic response as well as negative permeability is observed down to 400 nm…
The origin of optical activity in single-walled carbon nanotubes (SWNTs) is investigated by performing first-principles calculations of the circular dichroism (CD) spectrum. The calculated CD is in excellent agreement with experiments, which is understood in terms of the density of states and optical absorption, provi…
This work presents the preparation of nanomaterials thanks to the assembly of a triblock copolymer P(Sty 319 - co -AN 262 )- b -PEO 795 - b -P(Sty 319 - co -AN 262 ). The 3D construction is directed by the assembly of block copolymer micelles prepared in situ during the spin-coating of the block copolymer solution. Wi…
Using atom transfer radical polymerization (ATRP), we synthesized hybrid organic/inorganic nanoparticles consisting of a silica core and a polystyrene brush. The brushes were grafted from the nanoparticles with three different initiators, termed 3-BIDS, 11-BIDS, and 15-BIDS, consisting respectively of a 3-, 11-, or 15…
The aromatic bisphenol monomers containing bulky pendant (adamantyl) groups, 4-(1-adamantyl)-1,3-benzene diol (AdRES) and 4,8-bis(1-adamantyl)-1,5-dihydroxy naphthalene (AdNp) were successfully prepared via the Friedel—Crafts reaction and used to synthesize a series of new poly (aryl ether ketone) copolymers with (3-t…
We morphologically investigated animal skin exposed to W/O emulsion containing 10 wt % ultrafine TiO(2) particles that had been characterized. After 4 h, exposed skin was investigated by light microscopy, confocal laser scanning microscopy (CLSM) and electron microscopy with energy-dispersive X-ray spectrometry (EDX).…
σ-Metalation of tetracene can change the emission color of and introduce new structural dimensionality to the organic chromophore. Two synthetic entries to σ-metallotetracenes have been explored, leading to emissive mononuclear (Ph 3 PAu I )-tetracene ( 1 ) and cis -[Br(Et 3 P) 2 Pt II ]-tetracene ( 2 ) and binuclear…
The YVO 4:Eu 3+ and YVO 4:Eu 3+ @Au nanoparticle (NPs) colloids were prepared by a wet chemistry method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV−vis absorption spectra. The influence of particle concentration and Au coating on the photoluminescence properties of the…
Reduction of ammonia borane, NH(3) x BH(3), with Na or NaNH(2) in refluxing tetrahydrofuran (thf) affords the new compound, the unsubstituted aminodiboranate Na(BH(3)-NH(2)-BH(3)) (1a). Similar N-alkyl- and N,N-dialkylaminodiboranate salts, Na(H(3)B-NHMe-BH(3)) (1b), Na(H(3)B-NHEt-BH(3)) (1c), Na(H(3)B-NMeEt-BH(3)) (1…
The polymeric metal complex iron tris(dibenzoylmethane-polylactide), Fe(dbmPLA) 3, was synthesized from d,l -lactide and Fe(dbmOH) 3, a hydroxyl functionalized metalloinitiator. Reactions are fast relative to those with the dbmOH ligand initiator even when no Sn(oct) 2 or DMAP catalyst is added, indicating that iron s…
We report on the use of a phosphatase to assist the formation of leaf-like structures and a supramolecular hydrogel with an ultra-low minimum gelation concentration. The compound can gel water at a minimum gelation concentration of 0.01 wt%, which is the lowest gelation concentration reported up to now. The images obt…
Spun out to dry: Polymer-derived SiBN ceramic fiber, with excellent and thermally stable dielectric properties, resists crystallization up to 1700 and 1400 °C in nitrogen and in air, respectively, while retaining most of the room-temperature mechanical properties (see figure). The desirable combination of properties e…
We demonstrate in this paper the novel synthesis of multiarm star polyethylenes of well-defined arm lengths and controllable average arm numbers through the core-first multifunctional “living” polymerization protocol from ethylene stock. These novel star polymers are featured with a core−shell structure, having a hype…