Outcomes

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Publications view all
from our users
J. Mater. Chem. C, 2020, Advance Article
A cryogenic solid-state reaction at the interface between Ti and the Bi2Se3 topological insulator
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Understanding the chemical processes at the interface between a metal and topological insulator (TI) is important when it comes to designing devices that exploit the peculiar topological surface states or studying the properties of TI heterostructures. In this paper we show that the interface between Ti and Bi2Se3 is unstable at RT and results in the formation of interfacial phases of titanium selenides and metallic Bi. The reaction has shown significant kinetics already at cryogenic temperatures, which is very surprising for a solid-state redox reaction. This can be explained with the possibility of electrons in the topological surface states playing a role in enhancing the Bi2Se3 surface reactivity due to the electron-bath effect. For the Ti coverage above 40 nm, the interfacial processes cause compressive stress that triggers the morphological change (buckling) of the deposited film. The observed interface reaction, with all of its consequences, has to be considered not only in the design of devices, where the Ti adhesion layer is often used for contacts, but also for possible engineering of 2D TI heterostructures.
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from our users
Front. Chem., 8, 520 (2020)
Supported porous nanostructures developed by plasma processing of metal phthalocyanines and porphyrins
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The large area scalable fabrication of supported porous metal and metal oxide nanomaterials is acknowledged as one of the greatest challenges for their eventual implementation in on-device applications. In this work, we will present a comprehensive revision and the latest results regarding the pioneering use of commercially available metal phthalocyanines and porphyrins as solid precursors for the plasma-assisted deposition of porous metal and metal oxide films and three-dimensional nanostructures (hierarchical nanowires and nanotubes). The most advanced features of this method relay on its ample general character from the point of view of the porous material composition and microstructure, mild deposition and processing temperature and energy constrictions and, finally, its straightforward compatibility with the direct deposition of the porous nanomaterials on processable substrates and device-architectures. Thus, taking advantage of the variety in the composition of commercially available metal porphyrins and phthalocyanines, we present the development of metal and metal oxides layers including Pt, CuO, Fe2O3, TiO2, and ZnO with morphologies ranging from nanoparticles to nanocolumnar films. In addition, we combine this method with the fabrication by low-pressure vapor transport of single-crystalline organic nanowires for the formation of hierarchical hybrid organic@metal/metal-oxide and @metal/metal-oxide nanotubes. We carry out a thorough characterization of the films and nanowires using SEM, TEM, FIB 3D, and electron tomography. The latest two techniques are revealed as critical for the elucidation of the inner porosity of the layers.
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from our users
J. Mater. Chem. C, ,8, 8876-8886 (2020)
Molecular anchoring stabilizes low valence Ni(I)TPP on copper against thermally induced chemical changes
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Many applications of molecular layers deposited on metal surfaces, ranging from single-atom catalysis to on-surface magnetochemistry and biosensing, rely on the use of thermal cycles to regenerate the pristine properties of the system. Thus, understanding the microscopic origin behind the thermal stability of organic/metal interfaces is fundamental for engineering reliable organic-based devices. Here, we study nickel porphyrin molecules on a copper surface as an archetypal system containing a metal center whose oxidation state can be controlled through the interaction with the metal substrate. We demonstrate that the strong molecule–surface interaction, followed by charge transfer at the interface, plays a fundamental role in the thermal stability of the layer by rigidly anchoring the porphyrin to the substrate. Upon thermal treatment, the molecules undergo an irreversible transition at 420 K, which is associated with an increase of the charge transfer from the substrate, mostly localized on the phenyl substituents, and a downward tilting of the latters without any chemical modification.
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Deliverables view all
WP11 - NA – Innovation and networking activities
D11.20 - NFFA-EUROPE position paper on sustainable business models
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This position paper is addressed to both localised and distributed Research Infrastructures (RIs) in physical science and engineering with a representative volume of activity on nanoscience and nanotechnology. A set of original recommendation on how to better engage with industry are provided. The conclusions take in consideration the previous literature on the topic and the recommendation matured from relevant public stakeholders, policy makers and similar initiative. In particular, this paper presents the return of experience and the lessons learned from the NFFAEurope consortium and synthesises some of the main conclusions emerged in the context of relevant selected workshops organised with partner institutions focused on this topic.
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WP11 - NA – Innovation and networking activities
D11.21 - Final report on networking activity programmes
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This report describes the main work carried out to date in the Networking workpackage (WP11). The main activities planned in the original NFFA concern: - ORGANISATION AND DEFINITION OF A TECHNICAL LIAISON NETWORK TO ASSIST THE USER ACCESS TO THE NFFA FACILITY - THE DEFINITION OF A PROPER NFFA-EUROPE BRANDING - THE OUTREACH ACTIONS TO PROMOTE THE NFFA ACCESS AND IMPROVING THE VISIBILITY OF THE AVAILABLE RESOURCES AND OF THE MAIN OUTCOMES, BOTH FOR INDUSTRY AND ACADEMIA - AN ADVANCED TRAINING PROGRAMME - A COORDINATED SURVEY SPECIFICALLY DEVOTED TO DEFINE A SUITABLE METADATA SET FOR NANOSCIENCE Furthermore, a set of extra activities will be reported in the domain of nanosafety and outreach for general pubblic which were not specified in the original proposal, but that emerged as a strategic element for the success of the proposal during the mid-term review.
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WP11 - NA – Innovation and networking activities
D11.19 - Second Report on the incentivised knowledge transfer and feasibility work with industry
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Incentivised knowledge transfer (IKT) is provided within the context of actions in subtask 11.5.3. IKT is available to industrial users when they request an experiment, which presents a level of uncertainty. In this case, the facilities can decide to grant a feasibility access to the user and run a rapid measurement, which can clear the doubts and help identifying the most appropriate way to proceed. This access mode has been established to reduce the risks associated with industry experiencing long feasibility and pilot studies and enable a following peer-review or proprietary access. This second report on the incentivised knowledge transfer and feasibility work with industry aims at describing the use of this tool by the partners of the NFFA consortium. This report will give also an update of the actions already initiated and described in the first report. The main conclusion of the present report are the following: a) IKT was mainly established as a risk mitigation strategy to support the TNA access or, when needed a confidential access for large Companies (SME can already demand the results to be confidential). b) An advertising campaing have been put in place to outreach the industrial community, and the IKT was a key element of the NFFA strategy to engage with industry. c) Some IKT accesses have been realised along the project, but relatively limited with respect to the budget available. d) This is the proof that the transnational (TNA) programme worked very efficiently and that this access mode was adequate to satisfy the industrial need. Furthermore, some suggestions are provided with reference to the impact of this tool with respect to the partner operations and the possibility to use this tool to better support the overall strategy of NFFA engaging with industry.
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Transnational Access Statistics
15 calls for access
495 proposals submitted
65% rate of acceptance
32% with Large Scale Facilities
13% with theory
12% with industry
~3 average users per proposal
56 countries applying
1457 lab sessions