Materials Literature
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We have investigated the uptake of cationic polystyrene nanoparticles by mesenchymal stem cells (MSCs) using confocal fluorescence microscopy and flow cytometry. Two types of nanoparticles of about 100 nm diameter with similar zeta potentials were employed in this study, plain polystyrene (PS) nanoparticles and amino-…
Condensed-matter systems that are both low-dimensional and strongly interacting often exhibit unusual electronic properties. Strongly correlated electrons with greatly enhanced effective mass are present in heavy fermion compounds, whose electronic structure is essentially three-dimensional. We realized experimentally…
Bacterial cellulose produced by the gram-negative bacterium Gluconacetobacter xylinum was found to be an excellent native starting material for preparing shaped ultra-lightweight cellulose aerogels. The procedure comprises thorough washing and sterilization of the aquogel, quantitative solvent exchange and subsequent…
Polyoxotungstates [PW(4)O(24)](3-) (PW(4)) and [PW(12)O(40)](3-) (PW(12)) have been inserted into nanocages of the metal organic framework MIL-101. The hybrid materials PW(x)/MIL-101 (x = 4 or 12) containing 5-14 wt % of polyoxotungstate have been obtained and characterized by elemental analysis, N(2) adsorption, FT-I…
The performance of existing force-field models for the calcium carbonate - water system has been critically assessed with particular reference to the thermodynamic consequences. It is demonstrated that all currently available parametrizations fail to describe the calcite-aragonite phase transition, and the free energi…
A key challenge in the synthesis of multicomponent nanoparticles (NPs) for therapy or diagnosis is obtaining reproducible monodisperse NPs with a minimum number of preparation steps. Here we report the use of microfluidic rapid mixing using hydrodynamic flow focusing in combination with passive mixing structures to re…
Perylene tetracarboxylic diimide (PTCDI) derivatives stand out as one of the most investigated families of air-stable n-type organic semiconductors for organic thin-film transistors. Here, we use density functional theory to illustrate how it is possible to control the charge-transport parameters of PTCDIs as a functi…
Graphene sheets are of significance in fundamental and applied science for their exceptional electronic, mechanical, and thermal properties. Among the different methods for producing graphene sheets, chemical reduction is favorable, because it can be scalable in production and versatile in realizing abundant chemical…
ADVERTISEMENT RETURN TO ISSUEEditorialNEXTPlasmonic NanoparticlesGeorge SchatzView Author Information Northwestern University, Evanston, Illinois 60208-3113Cite this: J. Phys. Chem. Lett. 2010, 1, 4, 802Publication Date (Web):February 18, 2010Publication History Received18 January 2010Accepted19 January 2010Published…
We studied athermal relaxation of bulk extended chains by means of dynamic Monte Carlo simulations, and we got intermediately relaxed melts with a memory of chain orientations but no more crystalline order. The orientational memory in the melts dominated the crystal orientation and nucleation types. The difference in…
Like many other aerobic archaea, the hyperthermophile Sulfolobus solfataricus possesses a gene cluster encoding components of a putative 2-oxoacid dehydrogenase complex. In the current paper, we have cloned and expressed the first two genes of this cluster and demonstrate that the protein products form an alpha(2)beta…
A new pregnane glycoside hindicusine (1) was isolated from the CHCl(3)-EtOH (3 : 2) extract of Hemidesmus indicus, whose structure was established on the basis of spectroscopic studies. The glycoside (1) and its acetylated derivative (5) were evaluated for their anti-oxidant and anti-dyslipidemic activities.
Pure methoxycarbonylsulfenyl cyanide, CH(3)OC(O)SCN (I), and methoxycarbonylsulfenyl thiocyanate, CH(3)OC(O)SSCN (II), were prepared by reacting liquid CH(3)OC(O)SCl with either AgCN or AgSCN, respectively. Compounds I and II were characterized by (1)H NMR, CG-MS, and vibrational (FTIR and FT-Raman) techniques. The co…
Abstract Hydroxy‐terminated telechelic poly(vinyl ether)s with pendant oxyethylene chains were synthesized by the reaction of the CH 3 CH(OCOCH 3 )O[CH 2 ] 4 OCH(OCOCH 3 )CH 3 /Et 1.5 AlCl 1.5 /THF‐based bifunctional living cationic polymers of 2‐methoxyethyl vinyl ether (MOVE), 2‐ethoxyethyl vinyl ether (EOVE), and…
Abstract Poly‐ L ‐proline has been used as a model system for various purposes over a period of more than 60 years. Its relevance among the protein/peptide community stems from its use as a reference system for determining the conformational distributions of unfolded peptides and proteins, its use as a molecular ruler…
Abstract A new approach to prepare and characterize double network elastomeric systems was investigated. A styrene‐ethylene‐ co ‐butylene‐styrene (SEBS) triblock copolymer system containing physical crosslinks was used to achieve a double network by additional crosslinking using ultra‐violet (UV) light. An ethylene–pr…
Three new gallium diphosphonates: Ga(3)(OH)(O(3)PC(3)H(6)PO(3))(2) (1), Ga(4)(O(3)PC(5)H(10)PO(3))(3)(C(5)H(5)N)(2) (2), and Ga(HO(3)PC(10)H(20)PO(3)) (3), in which the diphosphonate bridging ligands have 3, 5, and 10 methylene units, respectively, have been synthesized using solvothermal methods and their structures…
The racemate and enantiomer of sertraline free base were prepared and characterized. The crystalline sertraline enantiomer is relatively less polymorphic compared with the sertraline-HCl salt. The solid-state nature of sertraline racemate was identified to be a racemic compound through a binary melting point phase dia…
Air-stable four-coordinate As(III) complexes, [As(L4)Cl] (1) and [As(L4)I] (2), were prepared using a rearranged form of the deprotonated benzothiazoline ligand, 2-(pyridin-2-yl)-2,3-dihydrobenzo[d]thiazole. Complexes 1 and 2 have been characterized by FTIR, (1)H NMR, UV-vis, and elemental microanalysis. The solid-sta…
We report negative and positive refraction in a prism made of stacked perforated thin surfaces for s and p polarization, respectively. By corrugating the subwavelength slits of a free-standing periodic arrangement, geometrically induced surface-plasmon-like currents are excited and transmission is allowed under s pola…