Materials Literature
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Electrospinning of a polyelectrolyte and vapor deposition polymerization were combined to fabricate nanotubes of oxidatively stabilized poly(acrylonitrile) (PANDelta) with an outer diameter of 100 nm, a wall thickness of 14 nm, and centimeter-scale length. Poly(styrene sulfonate) sodium (PSSNa) nanofibers serves as sa…
Individual colloidal particles are locally functionalized with nanoscale control. Here we use the particle lithography technique to mask one region of a silica or polystyrene particle (size 3.0 mum down to 170 nm), while the remaining 95% or more of the particle is coated with various sized nanocolloids. The images an…
Bismuth telluride (Bi2Te3) nanowires were deposited into porous alumina templates with 35 nm diameter pores by a pulsed-potential electrodeposition method. For growth at temperatures between 1 and 4 degrees C, the nanowires filled 93% of the pores of the template, and the growth fronts were uniform with nanowire lengt…
This paper reports for the first time that the shape of silver nanostructures on quartz slides, from a nanoprism to a nanodisc, can be easily realized within a few minutes simply by adjusting the pH value of the immersion solution. Different colours of the quartz slide covered with Ag nanostructures appeared, from dee…
Owing to the lack of proper models, mainly for the strain broadening component due to dislocations, full exploitation of whole powder pattern modelling for the microstructural analysis of materials has been limited so far to high-symmetry lattices. An extension of the dislocation-induced broadening model, valid for an…
A carboxylic acid-terminated polyhedral oligosilsesquioxane (POSS)-core dendrimer (POSS-CO2H) was synthesized from octa(3-ammoniumpropyl)octasilsesquioxane octachloride (POSS-NH3+) via a t-butyl ester-terminated POSS-core dendrimer that was prepared from neutralized POSS-NH3+ and t-butyl acrylate. Complexing propertie…
Magnetocaloric effect in La1−xAgyMnO3 (y ⩽ x): direct and indirect measurements, Kamilov, I K, Gamzatov, A G, Aliev, A M, Batdalov, A B, Aliverdiev, A A, Abdulvagidov, Sh B, Melnikov, O V, Gorbenko, O Yu, Kaul, A R
A comparative study on oligo(p-phenylene vinylene) (OPV)-appended porphyrins containing all trans-vinylene (either hydrophilic or lipophilic) or amide linkages (lipophilic) is presented. The type of supramolecular arrangement obtained in organic solvents proves to be strongly dependent on the nature of the covalent co…
In this work, surface-enhanced Raman scattering (SERS) was applied to probe the orientation of cytochrome c (Cyt-c) on gold nanohole arrays functionalized with self-assembled monolayers (SAMs) of alkane thiols with positively (-NH2) and negatively (-COOH) charged terminal groups. Square grid gold nanohole arrays with…
We report herein a modified approach to the seed-mediated synthesis of large-diameter quasispherical gold nanoparticles by using 2-mercaptosuccinic acid (MSA) as a reducing agent in aqueous solution at room temperature. Simply through a one-step seeding growth approach, gold nanoparticles in the size range 30–150 nm w…
In this paper, we report the dielectric breakdown properties of a nanocomposite, a potential electrical insulation material for cryogenic high voltage applications. The material is composed of a high molecular weight polyvinyl alcohol and nanosized in situ synthesized titanate particles. The dielectric breakdown stren…
Silicon has many attractive properties for quantum computing, and the quantum dot architecture is appealing because of its controllability and scalability. However, the multiple valleys in the silicon conduction band are potentially a serious source of decoherence for spin-based quantum dot qubits. Only when these val…
The syntheses, characterization, epsilon-caprolactone (CL) polymerization activity, and kinetics investigation of two zinc(II) bis(phenolato)amine complexes L2Zn2 are reported (L = methylamino-N,N-bis(2-methylene-4,6-di-tert-butylphenolato) and/or methylamino-N,N-bis(2-methylene-4-adamantyl-6-tert-butylphenolato)). X-…
A series of colloidal transition-metal-doped chalcogenide semiconductor nanocrystals (TM2+:CdSe, TM2+:CdS, etc.) has been prepared by thermal decomposition of inorganic cluster precursors. It is shown through extensive spectroscopic and structural characterization that the nanocrystals prepared following literature pr…
The 1H NMR spectra of a series of mono- and dinuclear pyridine complexes [FeL1(R1/R2)(py)2] and [Fe2L2(R1/R2)(py)4] have been investigated in a mixed toluene-d8/pyridine-d5 solution. The equatorial tetradentade Schiff base like ligands L1(R1/R2) and L2(R1/R2) with a N2O22- coordination sphere for each metal center hav…
The temperature dependence of dark conductivity at low temperatures (300-15 K) was studied on a wide microstructural range of well-characterized highly crystallized single phase undoped microcrystalline silicon samples. Our study reveals two different temperature dependences in films having different microstructures.…
We report the fabrication and photoluminescence properties of laterally-coupled GaAs/AlGaAs quantum dots. The coupling in the quantum dot molecules is tuned by an external electric field. An intricate behavior, consisting of spectral line crossings and avoided crossings is observed for different molecules. Anticrossin…
The phototransport properties of plasma deposited highly crystalline undoped hydrogenated microcrystalline silicon films were studied by measuring the steady state photoconductivity (SSPC) as a function of temperature and light intensity. The films possessing different thicknesses and microstructures had been well cha…
Many systems where a liquid metal is in contact with a polycrystalline solid exhibit deep liquid grooves where the grain boundary meets the solid-liquid interface. For example, liquid Ga quickly penetrates deep into grain boundaries in Al, leading to intergranular fracture under very small stresses. We report on a ser…
We study the effect of antiferromagnetic interactions on the single spin-flip Glauber dynamics of two different one-dimensional (1D) Ising models with spin $\pm 1$. The first model is an Ising chain with antiferromagnetic exchange interaction limited to nearest neighbors and subject to an oscillating magnetic field. T…