Materials Literature
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A 4f−3d heterometallic polymeric coordination compound [{Dy(hfac) 2 (CH 3 OH)} 2 {Cu(dmg)(Hdmg)} 2 ] n ([Dy 2 Cu 2 ] n; H 2 dmg = dimethylglyoxime; Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione) was synthesized, and the X-ray crystallographic analysis shows that the structure is isomorphous to the known ferrimagneti…
Platinum-group metals and noble metals play an important role in catalysis, for total oxidation as well as for partial oxidation reactions. Only in recent years have advances in microscopic, spectroscopic and computer simulation techniques made it possible to investigate the interaction of oxygen with metallic substra…
Abstract Cationic conjugated polymers (CCPs) with different charge densities are synthesized via Suzuki polymerization. The CCPs show similar optical properties in aqueous solutions but obvious difference in fluorescence resonance energy transfer (FRET) to Texas Red‐labeled single‐stranded DNA (ssDNA‐TR). Both CCP and…
Surfaces that respond to pH and UV stimuli are fabricated from self-assembled monolayers (SAMs) of a malachite green derivative on a rough surface (see figure). The wetting properties of the SAMs exhibit an uncommon response to pH and UV illumination, and range from superhydrophobicity to superhydrophilicity.
Heterogeneous oxidation catalysis on ruthenium: bridging the pressure and materials gaps and beyond, Assmann, J, Narkhede, V, Breuer, N A, Muhler, M, Seitsonen, A P, Knapp, M, Crihan, D, Farkas, A, Mellau, G, Over, H
Three new coordination polymers [Cu5(N3)10(en)2]n (1), [Cu6(N3)12(en)4]n (2), and [Cu4(N3)8(en)4]n (3) have been synthesized in a controlled manner by treatment of a 1:2 mixture of Cu(NO3)2 and NaN3 with varying amount of ethylenediamine (en). Single-crystal structure analyses clearly indicated that the puckered Cu4 b…
Direct generation of superbasicity on mesoporous silica SBA-15 was realized by tailoring the host-guest interaction, and calcium species were selected as the guest in modifying SBA-15. The results show that calcium species could be homogeneously distributed on the surface of SBA-15. Because of the host-guest interacti…
Local antibiotic delivery is an emerging area of study designed to provide alternative methods of treatment to clinicians for compromised wound sites where avascular zones can prevent the delivery of antibiotics to the infected tissue. Antibiotic-loaded bone cement is the gold standard for drug-eluting local delivery…
In this work, the reaction to fire of polymer nanocomposites (thermoplastic polyurethane, polylactide and polyamide-6) containing different nanofillers (organoclay, polyhedral silsesquioxanes or POSS and carbon nanotube) is investigated. When high level of nanodispersion is achieved (shown by transmission electron mic…
The antimicrobial activity of silver has attracted significant research interest and contributes to an exponentially growing use of this noble metal in commodity products. In this investigation, we describe a general approach to increase the antimicrobial activity of a silver-containing surface by two to three orders…
Isotactic polypropylene and elastomeric stereoblock polypropylene nanocomposites containing 0.1−3.5 wt % multiwall carbon nanotubes (MWCNTs) have been synthesized via the in situ polymerization approach using MAO-activated C 2 - and C 1 -symmetry ansa-zirconocenes, a technique that has not been previously reported in…
Abstract Poly(vinyl alcohol) (PVA) is a water‐soluble polymer that has been studied intensively because of several interesting physical properties that are useful in technical applications, including biochemical and medical applications. In this article, we report the effects of the addition of gelatin on the optical,…
Compact flat Ir islands form and are stable at 400 K when $<0.1$ monolayer of Ir is evaporated onto a graphene flake preadsorbed on Ir(111). Local density approximation calculations account for the Ir islands' two dimensionality and their preferred sites on the substrate. They show that local $s{p}^{3}$ bonding at…
Abstract Two Anderson‐type polyoxomolybdates [FeMo 6 O 18 {(OCH 2 ) 3 CNHCO(4‐C 5 H 4 N)} 2 ] 3– and [MnMo 6 O 18 {(OCH 2 ) 3 CNHCO(4‐C 5 H 4 N)} 2 ] 3– and two Lindqvist‐type polyoxovanadates [V 6 O 13 {(OCH 2 ) 3 CCH 2 OC(O)(4‐C 5 H 4 N)} 2 ] 2– and [V 6 O 13 {(OCH 2 ) 3 CNHCO(4‐C 5 H 4 N)} 2 ] 2– were functionalize…
We report extraordinary effects in the transmission of sound through periodically perforated plates, supported by both measurements and theory. In agreement with recent observations in slit arrays [M. H. Lu et al. Phys. Rev. Lett. 99, 174301 (2007)], nearly full transmission is observed at certain resonant frequencies…
In this paper we investigate the electronic properties of single molecules by means of low-temperature scanning tunneling spectroscopy (STS). We focus on C 60 molecules deposited on a Au(111) surface at different substrate temperatures and mixed with two different hydrocarbons. In this way we change the fullerene inte…
Considerable research has been directed toward identifying the mechanisms involved in biosilicification to understand and possibly mimic the process for the production of superior silica-based materials while simultaneously minimizing pollution and energy costs. Molecules isolated from diatoms and, most recently spong…
Abstract Conductive nanofibers are adopted to enhance the electric properties of ferroelectric polymers. Polyaniline (PANI) nanofibers doped by protonic acids have a high dispersion stability in vinylidene fluoride‐trifluoroethylene copolymers [P(VDF‐TrFE)] and lead to percolative nanocomposites with enhanced electric…
The electronic structures of the Heusler type compounds Fe$_{3-x}V$_x$Si in the concentration range between x = 0 and x = 1 have been probed by photoemission spectroscopy (PES). The observed shift of Si 2p core- level and the main valence band structres indicate a chemical potential shift to higher energy with increas…
The phonon and crystal field excitations in several rare earth titanate pyrochlores are investigated. Magnetic measurements on single crystals of Gd2Ti2O7, Tb2Ti2O7, Dy2Ti2O7 and Ho2Ti2O7 are used for characterization, while Raman spectroscopy and terahertz time domain spectroscopy are employed to probe the excitation…