Materials Literature
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The energy of electron Fermi sea perturbed by external potential, represented as energy anomaly which accounts for the contribution of the deep-lying states, is analyzed for massive d = 1+1 Dirac fermions on a circle. The anomaly is a universal function of the applied field, and is related to known field-theoretic ano…
Abstract Photoinduced orientation of a new photo-cross-linkable liquid crystalline polymer film comprising a 4-methoxycinnamoyloxy group connected with a tolane moiety (PMCT6M) is presented. High molecular reorientation order with a birefringence value of 0.27 is achieved by exposing the film to linearly polarized ult…
Abstract A novel method to prepare narrowly dispersed silver nanoparticles in hydrogel is reported. Gelator, the conjugate of cholic acid and polyethylene glycol 400, was used to form the gel, and it acted not only as the stabilizer preventing the silver particles from further growth and aggregation, but also as a red…
The phenylazomethine dendrimer (DPA) with amino groups at the terminal (end-amine dendrimer) was synthesized by the convergent method without protection from 4,4‘-diamino-3,3‘,5,5‘-tetramethylbenzophenone (DTB) as the raw material. The amino groups enabled the periphery of the dendrimer (DPA) to be modified by functio…
The structure of the ternary complex of mycothiol synthase from Mycobacterium tuberculosis with bound desacetylmycothiol and CoA was determined to 1.8 A resolution. The structure of the acetyl-CoA-binary complex had shown an active site groove that was several times larger than its substrate. The structure of the tern…
Abstract We report a simple fabrication method for creating a monolayer film of multiwalled carbon nanotubes (MWCNTs). The MWCNTs, which were synthesized using alumina template method, was dispersed in aqueous ethanol solution. Then toluene was added to the dispersion. After sonicating the solution, the MWCNTs form a…
Abstract A family of 3-ferrocenylazobenzene-attached dendrimers, 9mer, 27mer, and 81mer, which is the first series of redox-active photochromic dendrimers exhibit photochromism responding to three different light sources, i.e., 365, 436, and 546 nm lights. Decreases in the size of the dendrimers induced by trans-to-ci…
Syndiotactic propylene−ethylene copolymers have been synthesized with a single-center C s -symmetric syndiospecific metallocene catalyst. The samples show novel thermoplastic elastomeric behavior. Samples with ethylene contents lower than 18−20 mol % are crystalline and show high ductility and remarkable values of the…
A mechanical model for anisotropic curved interfaces, applicable to thermodynamically closed surfactant-laden liquid-liquid crystal interfaces is developed. The model takes into account the mechanical effects due to surface bending and surface tilting (anchoring) and incorporates liquid crystal anisotropy into classic…
Porous silica spheres functionalized with quaternary ammonium groups have been prepared by co-condensation of N-((trimethoxysilyl)propyl)-N,N,N-trimethylammonium chloride (TMTMAC) and tetraethoxysilane (TEOS) in the presence of cetyltrimethylammonium as a template and ammonia as a catalyst. The physicochemical charact…
The phase behavior and associated pattern formation of two-dimensional systems of hard disks decorated with amphiphilic coronae (Janus disks) are studied by means of Monte Carlo computer simulations. A primitive interaction potential that captures the essential interparticle interactions is introduced. Despite its sim…
[reaction: see text] Phenylene-linked bisnaphthopyrans were synthesized in good yields via the one-pot reaction of bis-propargyl alcohols with naphthols. Temperature-dependent photochromism in 1,4-phenylene-linked bispyrans leads to up to 60 nm bathochromic shift between the colored species formed at room temperature…
Treatments of Mn(O(2)CR)(2) (R = Me, Ph) with NBu(4)MnO(4) in CH(3)CN or CH(3)CN/CH(2)Cl(2) in the presence of acetic acid, delta(1)-cyclohexenephosphonic acid (C(6)H(9)PO(3)H(2)), and 2,2'-bipyridine or 1,10-phenanthroline result in three novel dodecamanganese(III) clusters [Mn(12)O(8)(O(2)CMe)(6)(O(3)PC(6)H(9))(7)(b…
We report the preparation and characterization of poly(N-isopropylacrylamide) (PNIPAAm) polymer brushes exhibiting controlled lateral variations in the patchiness of polymer chains. These gradients were achieved through an atom transfer radical polymerization (ATRP) grafting-from approach utilizing surfaces on which t…
A method that combines co-evaporation of pure elements from multiple finite-size sources on temperature-controlled substrates with independently controlled source shutters has been used for the synthesis of solid-state material combinatorial libraries. The source shutters are positioned to achieve a controlled gradien…
Hollow silica spheres with mesostructured shells (HSSMS) were prepared with a vesicle template of cetyltrimethylammonium bromide-sodium dodecyl sulfate-Pluronic P123 (C(16)TMAB-SDS-EO(20)PO(70)EO(20)) at a SDS/C(16)TMAB ratio of 0.6-0.8 following a fast silicification in dilute silicate solution at pH approximately 5.…
We have analyzed the interaction of a dissipative two level quantum system with high and low frequency excitation. The system is continuously and simultaneously irradiated by these two waves. If the frequency of the first signal is close to the level separation the response of the system exhibits undamped low frequenc…
We study the role played by the magnetic frustration in the antiferromagnetic phase of the organic salt κ - (BEDT–TTF) 2 Cu[N(CN) 2 ]Cl. Using the spatially anisotropic triangular Heisenberg model we analyse previous and newly performed NMR experiments. We compute the 1/ T 1 relaxation time by means of the modified sp…
In this letter, Monte Carlo simulation methods were used to investigate the influence of the defect orientation and concentration on the hysteresis loop in ferroelectric thin films. The hysteresis loops were calculated by an existing Monte Carlo model. For a certain type of defect orientation, the simulations revealed…
In this paper we consider buoyancy-driven flow and directional solidification of a ternary alloy in two dimensions. A steady flow can be established by forcing liquid downward at an average rate V through a temperature gradient that is fixed in the laboratory frame of reference and spans both the eutectic and liquidus…