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4 results on '"X. Dollat"'

1. Very high frequency probes for atomic force microscopy with silicon optomechanics

Author

L. Schwab, P. E. Allain, N. Mauran, X. Dollat, L. Mazenq, D. Lagrange, M. Gély, S. Hentz, G. Jourdan, I. Favero, B. Legrand, Équipe Microsystèmes électromécaniques (LAAS-MEMS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Service Instrumentation Conception Caractérisation (LAAS-I2C), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ANR-14-CE26-0019,OLYMPIA,Sondes opto-mécaniques pour la microscopie AFM rapide(2014), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPC)

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Physics - Instrumentation and Detectors, Materials Science (miscellaneous), [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Condensed Matter Physics, Industrial and Manufacturing Engineering, Atomic and Molecular Physics, and Optics, Optics (physics.optics), Physics - Optics
Abstract

Atomic force microscopy (AFM) has been consistently supporting nanosciences and nanotechnologies for over 30 years and is used in many fields from condensed matter physics to biology. It enables the measurement of very weak forces at the nanoscale, thus elucidating the interactions at play in fundamental processes. Here, we leverage the combined benefits of micro/nanoelectromechanical systems and cavity optomechanics to fabricate a sensor for dynamic mode AFM at a frequency above 100 MHz. This frequency is two decades above the fastest commercial AFM probes, suggesting an opportunity for measuring forces at timescales unexplored thus far. The fabrication is achieved using very-large-scale integration technologies derived from photonic silicon circuits. The probe’s optomechanical ring cavity is coupled to a 1.55 μm laser light and features a 130 MHz mechanical resonance mode with a quality factor of 900 in air. A limit of detection in the displacement of 3 × 10−16 m/√Hz is obtained, enabling the detection of the Brownian motion of the probe and paving the way for force sensing experiments in the dynamic mode with a working vibration amplitude in the picometer range. When inserted in a custom AFM instrument embodiment, this optomechanical sensor demonstrates the capacity to perform force-distance measurements and to maintain a constant interaction strength between the tip and sample, an essential requirement for AFM applications. Experiments indeed show a stable closed-loop operation with a setpoint of 4 nN/nm for an unprecedented subpicometer vibration amplitude, where the tip–sample interaction is mediated by a stretched water meniscus.

Published
2021

2. Development of pH-ISFET sensors for the detection of bacterial activity

Author

Pierre Temple-Boyer, William Sant, Laurent Malaquin, X. Dollat, Iryna Humenyuk, and M.L. Pourciel-Gouzy

Subjects
Chromatography, Chemistry, technology, industry, and agriculture, Metals and Alloys, Analytical chemistry, Ion sensitive, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Lactobacillus acidophilus, Materials Chemistry, Bacterial activity, Field-effect transistor, Electrical and Electronic Engineering, ISFET, Monitoring ph, Instrumentation, A titanium
Abstract

Ion sensitive field effect transistor (ISFET) microsensors including a SiO 2 /Si 3 N 4 pH-sensitive gate structure and a titanium/gold pseudo-electrode have been used to detect the activity of the Lactobacillus Acidophilus bacterium. The first results have shown that such applications require high bacterial concentrations and, therefore, small analysis volumes. Thus, the pH-ISFETs have been adapted by fabricating micro-tanks from plexiglas or poly-dimethylsiloxane (PDMS). Bacterial detection over several minutes has been made possible by monitoring pH variations. This will allow ChemFET microsensors to be developed for bacteriological applications and for clinical analysis in particular.

Published
2004

3. Rackham: An Interactive Robot-Guide

Author

Matthieu Herrb, Gérard Bailly, Sara Fleury, P. Marcoul, X. Dollat, Rachid Alami, Ludovic Brèthes, Raja Chatila, Guillaume Infantes, Frédéric Elisei, V. Montreuil, Aurélie Clodic, M. Cottret, Paulo Menezes, Patrick Danes, J. Manhes, C. Lemaire, Isabelle Ferrané, Frédéric Lerasle, Laboratoire d'analyse et d'architecture des systèmes (LAAS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J), Institut de la communication parlée (ICP), Université Stendhal - Grenoble 3-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Équipe Structuration, Analyse et MOdélisation de documents Vidéo et Audio (IRIT-SAMoVA), Université de Toulouse (UT)-Université de Toulouse (UT)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Toulouse Mind & Brain Institut (TMBI), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3, Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1)

Subjects
0209 industrial biotechnology, Ubiquitous robot, Personal robot, Social robot, Computer science, Mobile robot, 02 engineering and technology, Robot learning, Mobile robot navigation, Robot control, 020901 industrial engineering & automation, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Human–computer interaction, 0202 electrical engineering, electronic engineering, information engineering, Robot, 020201 artificial intelligence & image processing, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Abstract

International audience; Rackham is an interactive robot-guide that has been used in several places and exhibitions. This paper presents its design and reports on results that have been obtained after its deployment in a permanent exhibition. The project is conducted so as to incrementally enhance the robot functional and decisional capabilities based on the observation of the interaction between the public and the robot. Besides robustness and efficiency in the robot navigation abilities in a dynamic environment, our focus was to develop and test a methodology to integrate human-robot interaction abilities in a systematic way. We first present the robot and some of its key design issues. Then, we discuss a number of lessons that we have drawn from its use in interaction with the public and how that will serve to refine our design choices and to enhance robot efficiency and acceptability.

Published
2006

4. A disposable plastic compact wrist for smart minimally invasive surgical tools

Author

A. Giraud, Daniel Esteve, F. Van Meer, and X. Dollat

Subjects
musculoskeletal diseases, business.product_category, Computer science, Forceps, Mechanical engineering, Bending, Wrist, Pulley, Ball joint, Vertebra, medicine.anatomical_structure, Grippers, medicine, Surgical instrument, business, Biomedical engineering
Abstract

This paper describes a new compact bending and disposable (to avoid nosocomial contaminations) plastic wrist for minimally invasive surgery with a large free space for several connections such as electrical wires, fiberoptics and fluidic tubes, etc. It uses small partially locked ball joints to increase the dexterity of surgical tools in all directions contrary to other wrists using several successive orthogonal joints. This compact wrist is a generic concept comprises at least two vertebrae composed of non-attached contacts: plastic plates and balls. Six metal wires drive the position of each vertebra and several other free wires allow the locking of wrist axial rotations. Analytic and finite element simulations allow an evaluation of the mechanical rigidity of the wrist by several parameters: the wire number, diameter, position, mechanical properties and the general geometry of the wrist. The wrist is fabricated with 6 mm biocompatible plastic vertebrae micromachined by low cost water jet cutting. It uses 0.3 mm NiTi super-elastic wires for its mechanical structure which enable two degrees of freedom (DOF) in any directions between -85 degrees and 85 degrees. The two DOFs of the wrist and the DOF of the forceps are driven by a handled basic system using pulleys, 0.5mm Topline/spl reg/ ropes connected to NiTi wires and four RC-servomotors. In the first prototype 6 electrical wires, 2 micro-light emitters and 4 fiberoptics were successfully integrated. We are convinced of the effectiveness of this compact disposable plastic wrist, to be used with a usual or a motorised handled surgical instrument and integrating new functionalities such as electrical/optical/fluidics connections for smart surgical embedded micro-systems like micro-sensors and micro-actuators.

Published
2005

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