Posts

Seminar : Near field Microwave and Optical Microscopy

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Davide Mencarelli, Ph.D.
UPVM (Universita Polytechnica delle Marche) in Ancona (Italy)

Friday 1st june 2018 – 2pm
IEMN – LCI Salle du conseil – Villeneuve d’Ascq

Abstract :

Scanning Probe Microscopy (SPM) includes a wide class of different techniques united by the fact that a probe is scanned over a sample surface to build up high-resolution images. The latter can normally visualize different properties of the sample, because different probe-sample short-range interactions can be exploited. Atomic Force Microscopy (AFM) and Scanning Tunneling Microscopy (STM) are very common examples of such techniques. Another very remarkable example is provided by Scanning Microwave Microscopy (SMM), where the probe-sample interaction, still given by atomic force or by tunneling current, is augmented by e.m. evanescent fields, featuring rapid decay from the probe tip. The additional information provided by the electromagnetic interaction, usually in the form of a recorded reflection coefficient, constitutes a useful mean to investigate high frequency properties of sample surface, e.g. dielectric constant, resistivity, dispersion.
The above characterization is also useful for current research on nanomaterial and nanoparticles, which include biologic and medical targets, such as drug delivery and antibacterial applications. An interesting example is given by SMM scan of breast cancer cells MCF-7 treated by fullerene (C60), with a simultaneous topographic and electromagnetic characterization of sample surface. Calibration of SMM data is necessary in order to isolate the probe-sample interaction, and to possibly disentangle the topography from the electromagnetic response of the sample. Use of microwave microscopy could be crucial to investigate the effects of fullerene treatment, and could enable, in the future, deep imaging of its penetration inside the cells.

Seminar : SCIENTEC distributeur et constructeur français de systèmes scientifiques

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Didier Pellerin,
directeur de SCIENTEC, ainsi qu’un représentant de PREVAC

29 june 2018 – 10:30
IEMN – Villeneuve d’Ascq

Abstract :

SCIENTEC est un distributeur et constructeur français de systèmes scientifiques : Champ proche, Microscopie Electronique à Balayage, Spectroscopie, Profilométrie optique, Profilométrie mécanique, Nano-Indentation, Couches minces, Technologie sous vide, Photométrie – Colorimétrie – Radiométrie.

 

Seminar : SCANNING MICROWAVE MICROSCOPY

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Davide Mencarelli, Ph.D.
UPVM (Universita Polytechnica delle Marche) in Ancona (Italy)

Friday 29 may 2018 – 2pm
IEMN – LCI Salle du conseil – Villeneuve d’Ascq

Abstract :

Scanning Probe Microscopy (SPM) includes a wide class of different techniques united by the fact that a probe is scanned over a sample surface to build up high-resolution images. The latter can normally visualize different properties of the sample, because different probe-sample short-range interactions can be exploited. Atomic Force Microscopy (AFM) and Scanning Tunneling Microscopy (STM) are very common examples of such techniques. Another very remarkable example is provided by Scanning Microwave 2
Microscopy (SMM), where the probe-sample interaction, still given by atomic force or by tunneling current, is augmented by e.m. evanescent fields, featuring rapid decay from the probe tip. The additional information provided by the electromagnetic interaction, usually in the form of a recorded reflection coefficient, constitutes a useful mean to investigate high frequency properties of sample surface, e.g. dielectric constant, resistivity, dispersion.
The above characterization is also useful for current research on nanomaterial and nanoparticles, which include biologic and medical targets, such as drug delivery and antibacterial applications. An interesting example is given by SMM scan of breast cancer cells MCF-7 treated by fullerene (C60), with a simultaneous topographic and electromagnetic characterization of sample surface. Calibration of SMM data is necessary in order to isolate the probe-sample interaction, and to possibly disentangle the topography from the electromagnetic response of the sample. Use of microwave microscopy could be crucial to investigate the effects of fullerene treatment, and could enable, in the future, deep imaging of its penetration inside the cells.

Seminar : OPTO-MECHANICS BY TRANSFORMATION OPTICS

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Davide Mencarelli, Ph.D.
UPVM (Universita Polytechnica delle Marche) in Ancona (Italy)

Friday 25 mai 2018 – 11pm
IEMN – LCI Salle du conseil – Villeneuve d’Ascq

Abstract :

Rigorous approaches to the Electromagnetic/Mechanical problem are needed as a further step towards the development of microwave circuits based on phonon propagation at micro-and nano-scale. In the future, this kind of circuits is likely to integrate opto-mechanically pumped phonon sources and detectors, as well as phonon processing components (waveguides, splitters, memories) to process information by means of phonons.
This presentation proposes a numerical solution of the electromagnetic/mechanical system of equations governing light behavior in opto-mechanical cavities, with the help of an extended version of the Transformation Optics (TO) method. According to its original concept, TO is an analytical tool that facilitates the design of a variety of optical devices (lenses, phase shifters, deflectors, etc.) by deforming the coordinate system, warping space to control the trajectories of the electromagnetic radiation. Such alteration turns into a change of the electromagnetic material parameters such as permittivity and the permeability. For the special case of optomechanics, TO is used to take into account for the time varying boundaries of the computational domain. This kind of calculation allows the development of an efficient generation of microwave coherent phonon sources, by engineering their propagation or coupling with phonon waveguides. The efficiency and the versatility of the strategy is tested by analysing the resonant behaviour of a corrugated Si-based nanobeam and comparing numerical results to experimental ones from the available literature.

Seminar : Industrial Robotics at Nanoscale

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Professor Sergej Fatikow
university of Oldenburg (AMIR group)

18 MAI 2018 at 11h00
IEMN amphithéâtre – Villeneuve d’Ascq

Abstract :

Current research activities in AMiR focus on the industrial microrobotics and nanoscale automation. The areas of research include nanohandling robots and systems; automated nanohandling methods; robot control methods for nanopositioning; fast vision feedback at nanoscale, etc. Prof. Fatikow introduces this rapidly developing research field, the motivation, the key research problems and industrial applications. He addresses the current work on an automated microrobot cell inside a scanning electron microscope (SEM). The latter serves as a powerful vision sensor and the work space for nanohandling robots equipped with application-specific tools. Major components – the piezo-driven nanohandling robots, the robot control system, the fast vision feedback – are discussed. Finally, current research projects in AMiR and related industrial applications are outlined. They include automated assembly of nanophotonic structures, nano-robotic handling of graphene, automated characterization of nanomaterials, and others.

 

https://www.uni-oldenburg.de/en/amir/

Séminaire : Molecular spin coupling at the tip of a STM

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Par Laurent Limot
chercheur CNRS à l’IPCMS à Strasbourg
Contact : limot@ipcms.unistra.fr

Mercredi 16 avril 2018 à 10h30
IEMN Salle du conseil – Villeneuve d’Ascq

 

Abstract :

Recent advances in addressing and controlling the spin states of a surface-supported object (atom or molecule) have further accredited the prospect of quantum computing and of an ultimate data-storage capacity [1]. Information encoding requires that the object must possess stable magnetic states, in particular magnetic anisotropy to yield distinct spin-dependent states in the absence of a magnetic field together with long magnetic relaxation times. Scanning probe techniques have shown that inelastic electron tunneling spectroscopy (IETS) within the junction of a scanning tunneling microscope (STM) is a good starting point to study the stability of these spin states [2]. STM-IETS allows for an all-electrical characterization of these states by promoting and detecting spin-flip excitations within the object of interest. As spin excitations need however to be preserved from scattering events with itinerant electrons, single objects are usually placed on non-metallic surfaces such as thin-insulating layers or superconductors. In this sense, new approaches to improve the detection of spin-flip excitations are desirable. With this purpose we present here a novel strategy based on the molecular functionalization of a STM tip. We study the surface magnetism of a simple doubledecker molecule, nickelocene [Ni(C5H5)2], which is adsorbed directly on a copper surface. By means of X-ray magnetic circular dichroism and density functional theory calculations, we show that nickelocene on the surface is magnetic (Spin = 1) and possesses a uniaxial magnetic anisotropy, while IETS reveals an exceptionally efficient spin-flip excitation occurring in the molecule [3]. Interestingly, nickelocene preserves its magnetic moment and magnetic anisotropy not only on the surface, but also in different metallic environments. Taking advantage of this robustness, we are able to functionalize the STM tip with a nickelocene [3,4], which can then be employed as a portable source of inelastic excitations. As we will show during the talk, IETS can then be used to probe the interaction between a surface-supported object and the nickelocene tip, including a magnetic interaction.

M. Ormaza1, P. Abufager2, B. Verlhac1, N. Bachellier1, M.-L. Bocquet3, N. Lorente4, and Laurent Limot1,*
1Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France
2Instituto de Física de Rosario, CONICET, Universidad Nacional de Rosario, Argentina
3Ecole Normale Supérieure, UPMC Univ. Paris 06, CNRS, 75005 Paris, France
4CFM/MPC and DIPC, 20018 Donostia-San Sebastián, Spain

References
[1] F.D. Natterer et al., Nature 543, 226 (2017); T. Choi et al., Nat. Nanotech. 6 (2017)
[2] A.J. Heinrich, J.A. Gupta, C.P. Lutz, and D.M. Eigler, Science 306, 466 (2004)
[3] M. Ormaza et al., Nano Lett. 17, 1877 (2017)
[4] M. Ormaza et al., Nat. Commun. 8, 1974 (2017)

 

 

Séminaire : A propos de la dynamique non régulière

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Par Alain Léger
Directeur de Recherche au CNRS
Contact : leger@lma.cnrs-mrs.fr

Mercredi 28 mars 2018 à 14h00
IEMN Ampli LCI – Villeneuve d’Ascq

Abstract :

Cet exposé va présenter quelques aspects, d’abord introductifs, puis plus récents de la mécanique non régulière. Nombre de situations, conditions au bord ou lois de comportement, fournissent des exemples de non régularité en mécanique. On se concentrera principalement sur le cas du contact et du frottement mais plusieurs aspects fondamentaux seraient identiques dans les cas de la plasticité, de l’endommagement, etc… Dans tous les cas l’introduction de conditions non régulières en mécanique des milieux continus conduit à des problèmes mathématiques ouverts et difficiles. On essaiera pour cela de préciser minutieusement l’état des lieux, en forme de liste des problèmes résolus ou ouverts, afin que soient clarifiées les situations où il est légitime ou non d’utiliser des résultats dans différents domaines de la physique, et l’on observera que ce sont alors des modèles simples qui, pour autant qu’ils soient bien choisis, apportent des informations qualitatives là où des modèles plus proches de la physique seraient inaccessibles.

On rappellera que la non régularité supprime la possibilité de se référer au cadre classique de la théorie des équations différentielles ou aux dérivées partielles. Après quelques résultats, énoncés dans le cas d’un système mécanique très simple mais généralisables à tous les problèmes discrets, une partie importante de l’exposé sera consacrée à l’étude de la réponse à une sollicitation périodique comme cela est classique dans l’étude qualitative des systèmes dynamiques.

Dans un premier temps le système mécanique sera linéaire, ce qui en rendra les résultats utilisables qualitativement dans nombre de domaines de physique, d’acoustique ou de vibrations. Une attention particulière sera portée à la transition entre des zones de comportements différents, et l’on notera qu’aucune transition au chaos n’est observée lorsque la seule non linéarité est due au contact et au frottement. Dans un deuxième temps on ajoutera une non linéarité régulière de type grandes déformations. On verra alors que la réponse peut comprendre des zones de comportement non périodique, ce qui amènera, en conclusion, à interroger le couplage entre différents types de non linéarités.

 

NANORA Seminar

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Current Developments in Nanotechnology for Composites applications

NANORA – the NANO Regions Alliance organises  a free seminar on Nanocomposites « Current Developments in Nanotechnology for Composites applications » on March 19th 2015, 9 am – 6 pm Villeneuve d’Ascq – Complexe Ascotel Lille Métropole (close to Lille).

organized by the CREPIM and the Pôle d’Excellence Plasturgie et Composites Nord Pas de Calais
Parc de la Porte Nord – Rue Christophe Colomb – 62700 Bruay La Buissiere – France
Project Partners Interreg IV-B NANORA

Nanora Seminar LogosThe Nano Regions Alliance provides facilitated market entrance for nanotechnology SMEs through the transnational linking of regional support schemes, the development of new, transnational support structures and the set-up of transnational competence pools. The NANORA partnership is convinced that for European nanotechnology SMEs it is imperative to team up with the right partners – and to do so across borders. This is why they jointly developed a range of tools and services targeted at supporting SMEs in finding business partners, providing nanotechnology expertise, establishing R&D collaborations and facilitating market entrance.

The workshop will serve as an exchange basis for establishing links between the NANORA regions and other regions on related fields. It will discuss, how project stakeholders can collaborate in order to ensure added value for the projects and sustainability of project activities. The possibilities to join NANORA as a member, supporter or associate will also be evocated

Do not miss this unique opportunity to have real vision on new developments in nanocomposites!

No participation fee is required but registration is mandatory.
Places are limited and will be allocated on a first come first serve basis.

 

SPEAKERS
  • Sonia ELKOLLI, Crepim (FR)
  • Rebecca BARBIER, Pôle d’Excellence Plasturgie et Composites NPdC (FR)
  • Nicolas POINT, Multitel (BE)
  • Bruno CAPOEN, Université Lille 1 (FR)
  • Jacques DEVAUX, Université Catholique de Louvain (BE)
  • Kalappa PRASHANTHA, École des Mines de Douai (FR)
  • Emmanuel BIDAINE and Jean DI MARTINO, Luxembourg Institute of Science and Technology (LIST)
  • Fouad LAOUTID, MateriaNova (BE)
  • Daniel BONDUEL, Nanocyl (BE)
  • Stéphanie ZWIERZ, Conseil Régional Nord-Pas de Calais (FR)
PRELIMINARY AGENDA

 

CONTACT FOR QUESTIONS

Rebecca BARBIER
Pôle d’Excellence Plasturgie et Composites Nord Pas de Calais
Parc de la Porte Nord Rue Christophe Colomb 62700 Bruay-La-Buissière
Phone : +33 (0) 321 62 82 13
E-Mail: rb@portailplasturgie.com

Sonia ELKOLLI
CREPIM – www.crepim.fr
Parc de la Porte Nord Rue Christophe Colomb 62700 Bruay-La-Buissière
Phone : +33 (0) 3 21 61 64 04
Fax : + 33 (0) 3 21 61 64 01
E-Mail: sonia.elkolli@crepim.fr

VENUE

Complexe Ascotel Lille Métropole
7 Avenue Paul Langevin – Cité Scientifique
59650 Villeneuve d’Ascq, France
Phone: +33(0) 3 20 67 34 34
Fax: +33(0) 3 20 91 39 28

http://www.ascotel.fr/fr/plan