A new series of peptidic nanostructures bearing two intercalating moieties was designed and synthesized to achieve selective recognition of DNA sequences. A cationic porphyrin was attached to a glutamic acid side chain and the latter introduced into a peptidic sequence by standard solid-phase peptide synthesis methodology. Conformation of the hydrosoluble peptidic structures bearing two cationi...

Success in isolating a 2D graphene sheet from bulky graphite has triggered intensive studies of its physical properties as well as its application in devices. Graphite intercalation compounds (GICs) have provided a platform of exotic quantum phenomena such as superconductivity, but it is unclear whether such intercalation is feasible in the thinnest 2D limit (i.e., bilayer graphene). Here we re...

Graphite intercalation compounds, where some atom or molecule is inserted between the carbon layers of the host graphite, are attractive materials for charge storage. In commercial, rechargeable lithium ion batteries, for instance, the graphite anode intercalates and de-intercalates lithium as the battery is cycled [1]. In this work we present our in situ scanning transmission electron microsco...

A maximum sodium capacity of ∼35 mAh/g has hampered the use of crystalline carbon nanostructures for sodium ion battery anodes. We demonstrate that a diglyme solvent shell encapsulating a sodium ion acts as a "nonstick" coating to facilitate rapid ion insertion into crystalline few-layer graphene and bypass slow desolvation kinetics. This yields storage capacities above 150 mAh/g, cycling perfo...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

Robert Schöllhorn* and Wolfgang Schramm Anorganisch-Chemisches Institut der Universität Münster, Gievenbecker Weg 9, D-4400 Münster Z. Naturforsch. 84b, 697-699 (1979); received February 19, 1979 Topotactic Reactions, Intercalation Compounds, Niobium Chalcogenides, Ionic Conductivity, Superconductivity Cathodic reduction of Nb3S4 and Nb3Se4 electrodes in electrolytes containing cations of appro...