Materials Literature
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In this study, we fabricated PHB scaffolds by solid/liquid phase separation method. The properties of fabricated scaffolds were investigated using SEM, DMTA, and DSC. Our studies noticed that for an approach to scaffolds that contain tubular morphology and better mechanical properties, the solution should be frozen ne…
A highly ordered, vertically oriented TiO 2 nanorod array is successfully synthesized on a transparent conductive substrate with a facile, free-template, and low-temperature solution method and applied in the fabrication of a hybrid ultraviolet photodetector with polyfluorene. With TiCl 4 treatment, the device exhibit…
Nanotechnology is seeing higher propensity in various industries, including food and bioactives. New nanomaterials are constantly being developed from both natural biodegradable polymers of plant and animal origins such as polysaccharides and derivatives, peptides and proteins, lipids and fats, and biocompatible synth…
The flammability of various flame‐retarded formulations containing different hydrated mineral fillers and/or phosphorous compounds and/or carbon nanotubes has been investigated using both a cone calorimeter and a pyrolysis combustion flow calorimeter (PCFC). A method was proposed to evaluate the barrier effect of the…
3D polymer structures can be fabricated by rational control of the spacing between nanosized polymer brushes. Each nanobrush can be precisely patterned by combination of dip-pen nanodisplacement lithography and surface-initiated atom transfer radical polymerization (SI-ATRP; see picture). Complex 3D topographic images…
A novel functional tweezer based on uracil-appended glycyrrhetinic acid with excellent gelation ability was synthesized, and the gel could transform to sol by F(-) and Hg(2+).
We present a real-time study of the nanostructuring and cluster formation of gold nanoparticles deposited in aqueous solution on top of a pre-structured polystyrene colloidal thin film. Cluster formation takes place at different length scales, from the agglomerations of the gold nanoparticles to domains of polystyrene…
Synthesis of bimetallic clusters is a topic of accelerated interest; their physical and chemical properties are greatly dependent on their composition, size, and structure. The cluster beam technique is widely used for preparation of clusters. However, creating bimetallic clusters with well-controlled composition, siz…
We demonstrate the use of a Cu(I) catalyzed "Click" reaction in the synthesis of novel ligands for spin crossover complexes. The reaction between azides and alkynes was used to synthesize the reported tripodal ligand tris[(1-benzyl-1H-1,2,3-triazol-4-yl)methyl]amine, TBTA, and the new ligands tris[(1-cyclohexyl-1H-1,2…
We present the first experimental evidence for the morphological transition from twisted to helical ribbons in amphiphile aggregates. This transition, from structures possessing negative Gaussian curvature to helically curved structures, is shown to be directly linked to ribbon width. Time-resolved cryotransmission el…
Reactions of cerium oxide cluster anions with carbon monoxide are investigated by time-of-flight mass spectrometry and density functional theory computations aided with molecular dynamics simulations. Interesting size-dependent reactivity of the Ce n O 2 n +1 – cluster series with n = 1–21 is observed: (1) the small n…
We have observed a previously undescribed stepwise oxidation of mono- and few layer suspended graphene by silver nanoparticles in situ at subnanometer scale in an environmental transmission electron microscope. Over the range of 600-850 K, we observe crystallographically oriented channelling with rates in the range 0.…
Mg${}_{2}$Si${}_{1\ensuremath{-}x}$Sb${}_{x}$ compositions with $x$ ranging from 0 to 0.1 were prepared by induction melting and compacted by hot uniaxial pressing. The lattice parameter and the positional occupancy at the Mg site as a function of Sb substitution were calculated from Rietveld refinement. A monotonic i…
The reactions of N-fused tetraphenylporphyrin (NFTPP, 1a) and its 21-substituted derivatives, 21-Br-NFTPP (1b), 21-NO(2)-NFTPP (1c), and 21-Bz-NFTPP (1d), with Mn(CO)(5)Br gave the manganese(I) tricarbonyl complexes bearing N-fused tetraphenylporphyrinato ligands (2a-d), respectively, in 46-99% yields. The complexes w…
A zone plate lens utilizing a refractive instead of diffractive approach is presented for broadband operation. By utilizing transformation optics, we compress the conventional hyperbolic lens into a flat one with a few zone plates made of all-dielectric materials. Such a transformed lens maintains the broadband perfor…
An integral equation based scheme is presented for the fast and accurate computation of effective conductivities of two-component checkerboard-like composites with complicated unit cells at very high contrast ratios. The scheme extends recent work on multi-component checkerboards at medium contrast ratios. General imp…
Catalysis is so exhausting: A CeTi mixed oxide catalyst prepared by a homogeneous precipitation method presented excellent NH3-SCR activity with nearly 100 % NOx conversion in a temperature range of 200–350 °C (the main temperature range of diesel engine exhaust) at a space velocity of 50 000 h−1 and displayed promin…
This work presents a multiple scattering formulation of two dimensional acoustic metamaterials. It is shown that in the low frequency limit multiple scattering allows us to define frequency-dependent effective acoustic parameters for arrays of both ordered and disordered cylinders. This formulation can lead to both po…
We have obtained the first-principles electronic structure of solid coronene, which has been recently discovered to exhibit superconductivity with potassium doping. Since coronene, along with picene, the first aromatic superconductor, now provide a class of superconductors as solids of aromatic compounds, here we comp…
In this study, nanofibrous matrices of polycaprolactone (PCL) and PCL/collagen with immobilized epidermal growth factor (EGF) were successfully fabricated by electrospinning for the purpose of damaged skin regeneration. Nanofiber diameters were found to be 284 ± 48 nm for PCL and 330 ± 104 nm for PCL/collagen matrices…