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3 article(s) from Porrati, Fabrizio

Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures

Oleksandr V. Dobrovolskiy,
Maksym Kompaniiets,
Roland Sachser,
Fabrizio Porrati,
Christian Gspan,
Harald Plank and
Michael Huth

Beilstein J. Nanotechnol. 2015, 6, 1082–1090, doi:10.3762/bjnano.6.109

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Figure 1: Preparation and post-processing of the samples investigated in this work. Throughout the text the s...

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Figure 2: SEM images of the samples. The 500 × 860 nm² insets show the morphology of the post-processed Co/Pt...

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Figure 3: Time-dependent conductance of the Pt layer of sample C normalized to its saturation value after the...

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Figure 4: Hall voltage cycling at 10 K for all samples. Before measurements, all samples were saturated at 3 ...

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Figure 5: TEM micrographs of sample C acquired (a) in the high angle annular dark field mode and (b) in the a...

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Figure 6: (a) Cross-sectional and (b) lower layer in-plane EDX elemental peak intensities for sample C acquir...

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Figure 7: The location of the probed layers is shown in panel (a). Nano-diffractograms of the upper (b) and t...

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Figure 8: Isothermal Hall voltage cycling for sample D at a series of temperatures, as indicated. Insets: Tem...

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Full Research Paper

Published 29 Apr 2015

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Focused electron beam induced deposition: A perspective

Michael Huth,
Fabrizio Porrati,
Christian Schwalb,
Marcel Winhold,
Roland Sachser,
Maja Dukic,
Jonathan Adams and
Georg Fantner

Beilstein J. Nanotechnol. 2012, 3, 597–619, doi:10.3762/bjnano.3.70

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Figure 1: Illustration of FEBID. Precursor molecules (here: organometallic complex; blue: metal, green: organ...

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Figure 2: Single-species growth rate calculated for the precursor Me₃Pt(IV)CpMe assuming three different elec...

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Figure 3: Molecular models of octanol (left) and Co₂(CO)₈ (right). Rendered using Jmol.

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Figure 4: Simulation of concentration of different elements in FEBID structure under parallel use of Co₂(CO)₈...

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Figure 5: Molecular models of Si₅H₁₂ (left) and Me₃Pt(IV)CpMe (right). Rendered using Jmol.

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Figure 6: Elemental composition of various Pt–Si deposits as determined by EDX according to [28]. The data were t...

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Figure 7: Dependence of the room temperature resistivity on the Si/Pt ratio in the FEBID samples according to ...

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Figure 8: Temperature-dependent conductivity of the Pt–Si FEBID samples represented as ln σ vs T⁻^a to facilit...

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Figure 9: TEM electron diffraction pattern of samples on carbon membrane before (left) and after (right) post...

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Figure 10: Temperature-dependent conductivity and Hall effect as a function of the applied magnetic field for ...

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Figure 11: Dependence of the yield ratio for the precursors Co₂(CO)₈ and Me₃Pt(IV)CpMe on the dwell time withi...

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Figure 12: Phase diagram of the transport regimes of granular metals. In the insulating regime for g < g_c ther...

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Figure 13: Temperature-dependent conductivity of Pt–C FEBID structures that have been exposed to different pos...

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Figure 14: Temperature-dependent conductivity of Pt–C FEBID structures that have been exposed to different pos...

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Figure 15: Calculated gauge factor κ as a function of intergrain coupling strength (bottom axis) and metal vol...

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Figure 16: Left: Strain-resistance effect of a Pt–C nanogranular sensor element measured on a test cantilever ...

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Video

Review

Published 29 Aug 2012

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Spontaneous dissociation of Co₂(CO)₈ and autocatalytic growth of Co on SiO₂: A combined experimental and theoretical investigation

Kaliappan Muthukumar,
Harald O. Jeschke,
Roser Valentí,
Evgeniya Begun,
Johannes Schwenk,
Fabrizio Porrati and
Michael Huth

Beilstein J. Nanotechnol. 2012, 3, 546–555, doi:10.3762/bjnano.3.63

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Figure 1: (a) Optical micrograph of the Co dissociation product on the plasma-activated silica surface. The d...

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Figure 2: SEM images of Co deposited on the plasma-pretreated silicon oxide and gold. The picture on the top ...

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Figure 3: (a) SEM micrograph of Co deposit formed after electron pre-irradiation of the rectangular area depi...

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Figure 4: (a) Temperature dependence of resistivity of Co deposit grown on the plasma-activated SiO₂ surfaces...

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Figure 5: (a) Top and (b) side view of DFT optimized structure of Co₂(CO)₈ and its frontier orbitals (c) HOMO...

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Figure 6: Schematic representation of the starting configurations with possible Co₂(CO)₈ orientations, consid...

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Figure 7: (a) Most stable structure of Co₂(CO)₈ on the (a) FOH-SiO₂ and (b) POH-SiO₂ surfaces. The molecule d...

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Figure 8: Band decomposed charge density for the valence band maximum for Co₂(CO)₈ on the (a) FOH-SiO₂ and (b...

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Full Research Paper

Published 25 Jul 2012

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Tunable magnetism on the lateral mesoscale by post-processing of Co/Pt heterostructures

Focused electron beam induced deposition: A perspective

Spontaneous dissociation of Co2(CO)8 and autocatalytic growth of Co on SiO2: A combined experimental and theoretical investigation

Spontaneous dissociation of Co₂(CO)₈ and autocatalytic growth of Co on SiO₂: A combined experimental and theoretical investigation