Nancones to protect AFM tips

Gold is a noble metal that, in comparison with silver and copper, has the advantage of corrosion resistance. Despite its high conductivity, chemical stability and biocompatibility, gold exhibits high plasticity, which limits its applications in some nanodevices. Here, we report an experimental and theoretical study on how to attain enhanced mechanical stability of gold nanotips. …

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From powder to water makes nanoribbons from carbon nanotubes

  Carbon nanotubes can be chemically modified by attaching various functionalities to their surfaces, although harsh chemical treatments can lead to their break-up into graphene nanostructures. On the other hand, direct coupling between functionalities bound on individual nanotubes could lead to, as yet unexplored, spontaneous chemical reactions. Here we report an ambient mechano-chemical reaction between …

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JORNAL DA UNICAMP: Do metal ao carbono, da Unicamp a Cambridge

Sorry, this entry is only available in Brazilian Portuguese.

The Influence of Morphology on the Charge Transport in Two-Phase Disordered Organic Systems

In this work we use a three-dimensional Pauli master equation to investigate the charge carrier mobility of a two-phase system, which can mimic donor-acceptor and amorphous- crystalline bulk heterojunctions. Our approach can be separated into two parts: the morphology generation and the charge transport modeling in the generated blend. The morphology part is based on …

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Graphynes: how they are hydrogenated

  Graphyne is a generic name for a carbon allotrope family of 2D structures, where acetylenic groups connect benzenoid rings, with the coexistence of sp and sp2 hybridized carbon atoms. In this work we have investigated, through fully atomistic reactive molecular dynamics simulations, the dynamics and structural changes of the hydrogenation of α, β, and …

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Brazilian Physical Society highlighted Nature Communications article about sponges

Brazilian Physical Society highlighted Nature Communications article about sponges:   Low-density nanostructured foams are often limited in applications due to their low mechanical and thermal stabilities. Here we report an approach of building the structural units of three-dimensional (3D) foams using hybrid two-dimensional (2D) atomic layers made of stacked graphene oxide layers reinforced with conformal …

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Brazilian Scientific Society highlights unzipping novel process

Brazilian Physical Society highlighted in  July, 24, 2014, the published article in NanoLetters about high velocity impact unzipping process.

Surface effects on the mechanical elongation of AuCu nanowires: De-alloying and the formation of mixed suspended atomic chains

  Lagos, MJ; Autreto, PAS; Bettini,; Sato,; Dantas, SO; Galvao, DS; Ugarte, Surface effects on the mechanical elongation of AuCu nanowires: De-alloying and the formation of mixed suspended atomic chains (Journal Article) Journal of Applied Physics, 117 (9), pp. 094301, 2015. We report here an atomistic study of the mechanical deformation of Au x Cu (1− x ) atomic-size wires …

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Theoretical proposal, Fluorographane structure, is synthetised

“Since most of the properties of hydrogen are similar to those of halogens, recently performed theoretical studies on fluorinated graphane showed that the incorporation of fluorine into graphane would lead to additional opening of the band gap” In 2013, we have published an article in Nanotechnology: Paupitz, R., Autreto, P. A., Legoas, S. B., Srinivasan, S. …

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BN nanotube unzipping is the article in the cover of PCCP

  The ” Dynamical aspects of the unzipping of multiwalled boron nitride nanotubes” by Eric Perim, P.A.S. Autreto, Ricardo Paupitz and D.S. Galvão was chosen article in the cover letter of Physical Chemistry Chemical Physics in the edition number 15. Boron nitride nanoribbons (BNNRs) exhibit very interesting magnetic properties, which could be very useful in …

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