We grow epitaxial graphene monolayers on Ru(0001) that cover uniformly the substrate over lateral distances larger than several microns. The weakly coupled monolayer is periodically rippled and it shows charge inhomogeneities in distribution. Real space measurements by scanning tunneling spectroscopy reveal existence of electron pockets at higher parts ripples, as predicted a simple theoretical model. also visualize geometric electronic structure edges nanoislands.

Magnetic dc susceptibility $(\ensuremath{\chi})$ and electron-spin resonance (ESR) measurements in the paramagnetic regime, are presented. We found a Curie-Weiss behavior for $\ensuremath{\chi}(\mathrm{T})$ with ferromagnetic $\ensuremath{\Theta}=446(5) \mathrm{K}$ ${\ensuremath{\mu}}_{\mathrm{eff}}=4.72(9){\ensuremath{\mu}}_{B}/\mathrm{f}.\mathrm{u}.,$ this being lower than that expected either ${\mathrm{Fe}}^{3+}(5.9{\ensuremath{\mu}}_{B})$ or...

The design of ultratough hydrogels has recently emerged as a topic great interest in the scientific community due to their ability mimic features biological tissues. An outstanding strategy for preparing these materials relies on reversible and dynamic cross-links within hydrogel matrix. In this work, inspired by composition ascidians' tunic, stretchable supramolecular combining poly(vinyl alcohol), green tea-derived gallic acid, rigid tannic acid-coated cellulose nanocrystals (TA@CNC) were...

We report an EPR study at X- and Q-bands of polycrystalline single crystal samples the mixed copper(II) complex with L-glutamic acid (glu) 1,10-phenantroline (phen), [Cu(glu)(phen)(H(2)O)](+) NO(3)(-)·2(H(2)O). The sample spectrum Q-band showed well resolved g(∥ )and g(⊥) features partially solved hyperfine structure g(∥), typical for weakly exchange coupled systems. This is confirmed from angular variation spectra which shows certain magnetic field orientations a characteristic weak...

Abstract Cobalt compounds of the general formula [CoX 2 (α‐diimine)], where X = Cl or I and α‐diimines are 1,4‐diaryl‐2,3‐dimethyl‐1,4‐diaza‐1,3‐butadiene (Ar‐DAB) bis(aryl)acenaphthenequinonediimine (Ar‐BIAN) were synthesized by direct reaction anhydrous cobalt salts CoCl CoI corresponding α‐diimine ligand in dried CH . The [Co(Ph‐DAB)Cl ] ( 1a ), [Co( o , ′, p ‐Me 3 C 6 H ‐DAB)Cl 1b ′‐iPr 1c ) with ligands Ar‐DAB, also ‐BIAN)I 2′b Ar‐BIAN. crystal structures all solved single‐crystal X‐ray...

Summary Hybrid nanoparticles containing proteins have a technological interest because they attempt to achieve improved properties with respect the single materials by chemically linking both components. In this article, batch emulsion polymerization of methyl methacrylate in presence varied concentration casein and tert‐butyl hydroperoxide as initiator was investigated. A detailed characterization molecular microstructure morphology hybrid allowed identification two competitive particle...

The use of biopolymers as an alternative to petroleum-based polymers offers a sustainable solution with benefits such biodegradability and unique functionalities. In this study, starch/zein bioparticles (BPs) obtained by nanoprecipitation were employed synthesize acrylic polymer/biopolymer waterborne nanoparticles excellent film formation capability. These hybrid nanoparticle dispersions through semibatch emulsion polymerization using the previously synthesized BPs seed variable monomeric...

The first stages of the oxidation process titanium thin films deposited on top Cu(100) substrates have been studied by means Auger electron spectroscopy. Using principal component analysis we found different regimes for Ti depending their thickness. While a film thickness up to 1 ML only one oxide phase (${\mathrm{TiO}}_{2}$) is present, in thicker new (${\mathrm{TiO}}_{\mathrm{x}}$; x2) detected. As grows, passivating effect stops oxygen adsorption. Finally, thickest (>7 ML) interface turns...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange interaction between copper(II) ions through glutamic acid moleculesC. D. Brondino, N. M. C. Casado, G. Passeggi, and R. CalvoCite this: Inorg. Chem. 1993, 32, 10, 2078–2084Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 1993https://pubs.acs.org/doi/10.1021/ic00062a033https://doi.org/10.1021/ic00062a033research-articleACS PublicationsRequest reuse permissionsArticle...

We report powder and single crystal EPR measurements of [Cu(tda)(phen)]2·H2tda (tda = thiodiacetate, phen phenanthroline) at 9.7 GHz. This compound consists centrosymmetric copper(II) ion dimers, weakly ferromagnetically exchange-coupled (J +3.2 cm−1), in which the dimeric units are linked by hydrophobic chemical paths involving molecules. revealed that triplet spectra collapsed interdimeric exchange interactions mediated path. Analysis simulation were performed using Anderson’s narrowing...

Single crystal EPR experiments in copper-doped dimeric Zn(tda)(phen) allowed determination of Cu(<sc>ii</sc>) <bold>g</bold>- and <bold>A-</bold>matrices ZFS parameters, which are used to evaluate the interdimeric exchange interaction pure Cu(tda)(phen).

We report single-crystal X-band EPR and magnetic measurements of the coordination polymer catena-(trans-(μ2-fumarato)tetraaquacobalt(II)), 1, Co(II)-doped Zn(II) analogue, 2, in different Zn:Co ratios. 1 presents two magnetically inequivalent high spin S = 3/2 Co(II) ions per unit cell, named A B, a distorted octahedral environment coordinated to four water oxygen atoms trans carboxylic from fumarate anions, which are linked by hydrogen bonds molecules. Magnetic susceptibility magnetization...