Tag Archive for: Seminar

Seminar: Near field Microwave and Optical Microscopy

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, French distributor and manufacturer of scientific systems

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

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

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

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/

Seminar: Molecular spin coupling at the tip of an STM

By Laurent Limot
CNRS researcher at the IPCMS in Strasbourg
Contact: limot@ipcms.unistra.fr

Wednesday 16 April 2018 at 10.30 a.m.
IEMN Boardroom - 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)

 

 

Seminar: About non-regular dynamics

By Alain Léger
Director of Research at the CNRS
Contact: leger@lma.cnrs-mrs.fr

Wednesday 28 March 2018 at 14:00
IEMN Ampli LCI - Villeneuve d'Ascq

Abstract:

This talk will present some aspects, first introductory, then more recent, of non-regular mechanics. A number of situations, edge conditions or behaviour laws provide examples of non-regularity in mechanics. We will concentrate mainly on the case of contact and friction, but several fundamental aspects would be identical in the cases of plasticity, damage, etc. In all cases, the introduction of non-regular conditions in continuum mechanics leads to open and difficult mathematical problems. To this end, an attempt will be made to give a detailed account of the current state of affairs, in the form of a list of problems that have been solved or are still open, so as to clarify the situations in which it is legitimate or not to use results from different areas of physics, and it will be observed that it is in these cases simple models which, provided they are well chosen, provide qualitative information where models closer to physics would be inaccessible.

It will be recalled that non-regularity removes the possibility of referring to the classical framework of the theory of differential equations or partial derivatives. After a few results, stated in the case of a very simple mechanical system but generalisable to all discrete problems, a large part of the presentation will be devoted to the study of the response to a periodic load, as is traditional in the qualitative study of dynamic systems.

Initially, the mechanical system will be linear, which will make the results usable qualitatively in many areas of physics, acoustics or vibrations. Particular attention will be paid to the transition between zones of different behaviour, and it should be noted that no transition to chaos is observed when the only non-linearity is due to contact and friction. We will then add a regular non-linearity of the large deformation type. We will then see that the response can include zones of non-periodic behaviour, which will lead us to question the coupling between different types of non-linearity.

 

NANORA Seminar

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