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Offers : 12

Development and characterization of flexible transducers based on piezoelectric nanowires

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offer n° IMEPLaHC-11062018-CMNE

MASTER Student Training : First Semester 2019

 Development and characterization of flexible transducers based on piezoelectric nanowires
IMEP-LaHC / LMGP/ MINATEC / Grenoble-France

Keywords:
Nanotechnologies, Nanowires, Piezoelectricity, SALD

Training:
Very recently, the scientific community gets interested in nanowire devices, because of their unique electrical and mechanical properties due to their 1D structure. These properties could be exploited advantageously for several kinds of applications, such as sensors, actuators and energy harvesting devices (Fig.1)[1].

The training will mostly concentrate on the mechanical to electrical transduction using a composite material based on ZnO nanowires. These nanocomposites are expected to outperform thin piezoelectric films [2][3]. One of the technological challenges is the integration of these composites at low temperature over flexible substrates.
The objective of this training is to use the new technique SALD (Spatial Atomic Layer Deposition) [4] to deposit a seed layer of ZnO on different substrates (Elaboration at LMGP). This technique allows the depositions at very low temperature and very fast (up to 100 times faster than ALD) and work in air. The samples will be characterized using SEM, XRD and other conventional techniques. The NWs will be grown using the hydrothermal method and integrated into devices (Elaboration at IMEP-LaCH). The performance evaluation will be done at IMEP-LaHC or in the FMNT (Federation of Micro Nano Technologies) characterization platform (OPE)N(RA – http://fmnt.fr/plateforme-ope-n-ra/).

The training has three different and correlated goals:

  1. Participate to the fabrication of nanocomposite layers and triboelectric materials integrated on flexible substrates.
  2. Characterize electromechanically the fabricated devices thanks to a specific test bench.
  3. Eventually, the student could participate to the modeling of piezoelectric nanocomposites using the Finite Element Method (FEM) approach.

The achievement of these goals will allows us to better understand the underlaying physics and phenomena involved and to improve the performances of the composite material or triboelectric devices for energy harvesting or sensing applications.

The student will benefit from an established collaboration framework and will have the opportunity to contribute to national and European projects related to energy harvesting for autonomous systems.

References:
[1] S. Lee, R. Hinchet, Y. Lee, Y. Yang, Z.-H. Lin, G. Ardila, L. Montes, M. Mouis, Z. L. Wang, “Ultrathin Nanogenerators as Self-powered/Active Skin Sensors for Tracking Eye Ball Motion”, Adv. Funct. Mater., 24 (2014) p. 1163-1168.
[2]  R. Tao, G. Ardila L. Montes and M. Mouis, “Modeling of semiconducting piezoelectric nanowires for energy harvesting and sensing” Nano energy, 14 (2015) p.62-76.
[3] R. Tao, M. Parmar, G. Ardila, P. Oliveira, D. Marques, L. Montès, M. Mouis, “Performance of ZnO based piezo-generators under controlled compression”, Semiconductor Science and Technology, 32(6) (2017) p. 064003.
[4] D. Munoz-Rojas & J. MacManus-Driscoll, “Spatial atmospheric atomic layer deposition: a new laboratory and industrial tool for low-cost photovoltaics”. Materials Horizons, 1(3) (2014) 314-320.

More info:
Duration: 4 to 6 months (first semester 2019)
Level: Master 2 (or Master 1) / Engineering School
Location: IMEP-LaHC / Minatec / Grenoble, France
Advisor: Gustavo Ardila (ardilarg@minatec.grenoble-inp.fr) 
                  David MUNOZ-ROJAS (david.munoz-rojas@grenoble-inp.fr)

About the laboratory:
IMEP-LAHC / MINATEC / Grenoble
IMEP-LAHC is located in the Innovation Center Minatec in Grenoble. The main research areas concern Microelectronic devices (CMOS, SOI, …), Nanotechnologies, Photonic and RF devices. It works in close partnership with several industrial groups such as ST-Microelectronics, IBM, … and platforms such as LETI, LITEN, IMEC, Tyndall. The training will be within the group working on MicroNanoElectronic Devices / Nanostructures & Nanosystems. The trainee will have access to several technological (clean room) and characterization platforms.
LMGP / MINATEC / Grenoble 

LMGP/ MINATEC / Grenoble 
https://sites.google.com/site/workdmr/

Contacts:
Gustavo ARDILA  :ardilarg@minatec.grenoble-inp.fr +33 (0)4.56.52.95.32
David MUNOZ-ROJAS :  david.munoz-rojas@grenoble-inp.fr  +33 (0)4.56.52.93.36

  • Keywords : Engineering science, Engineering science, Electronics and microelectronics - Optoelectronics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : IMEPLaHC-11062018-CMNE
  • Contact : ardilarg@minatec.grenoble-inp.fr

Design and fabrication of an integrated microbiology impendance sensor

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offer n° IMEPLaHC-11102018-PHOTO

                                   Sujet de StageMaster Recherche / PFE   (5 à 6 mois)                                                                        Design and fabrication of an integrated microbiology impendance sensor

 

 

Monitoring of bacterial growth is critical in various environmental fields such as the drinkable water’s distribution. The design and fabrication of compact and portable sensors is thus crucial for efficient and continuous in-situ measurements.
With this objective in mind, the IMEP-LaHC and G2Elab laboratories are starting a collaboration to develop an integrated lab on chip to monitor bacterial concentrations. The originality of the project lies in the co-integration on a single glass substrate of two sensing microfluidic functions based on different physical principles (optical absorption1 and impedance spectroscopy2). The IMEP-LAHC, skilled in integrated optics and in radiofrequency, will be in charge of the opto-fluidic function and of the impedance spectroscopy measurements. The G2Elab will offer its expertise in electrode design, microfluidic polymer microsystems and ionic conduction. The IGE Institute3, as end-user, will validate the device by experimental measurements of bacterial concentrations.
The proposed internship is linked to the impedance spectrometry function and aims at designing a microfluidic cell with built-in electrodes to provide a first test-device for impedance measurement.
The student will be under the co-supervision of researchers of both IMEP-LaHC and G2Elab. The internship will fulfill two main objectives. The first goal will be to implement the envisaged manufacturing process of a microfluidic cell in polymer material. The second is to design and deposit stainless steel electrodes on a glass substrate. This last will then be bonded onto the microfluidic cell as a cover. If time permits, the chip will be tested with a bacterial suspension.
To fulfill these objectives, the student will be trained in the two laboratories for various techniques of design and fabrication. The training includes in particular:
– Polymer embossing for the microfluidic cell fabrication4
– Interdigital electrodes design
– Clean room processes for the electrode deposition and cover bonding

Advisors:
Leticia GIMENO  – 04 76 82 63 77
laboratoire G2Elab
Bâtiment GreEn-ER, 21 avenue des martyrs CS 90624 38031 Grenoble Cedex 1 – France

Elise GHIBAUDO – 04 56 52 95 31
laboratoire IMEP – LaHC
MINATEC – INPG, 3 Parvis Louis Néel BP 257 38016 Grenoble Cedex 1 – France
1 Geoffray F., Allenet T., Canto F., et al. Development of an Opto-fluidic Microsystem Dedicated to Chemical
Analysis in a Nuclear Environment. Procedia Chemistry, 2016, vol. 21, p. 453-460.
2 Xavier P., D. Rauly, E. Chamberod and J.M.F. Martins. 2017. Theoretical evidence of maximum intracellular
currents vs frequency in an Escherichia coli cell submitted to AC voltage. Bioelectromagnetics 38(3) : 213-219.
3 Institut des Géosciences de l’Environnement – CS 40700 38058 Grenoble Cedex
4 Fujii, T. (2002). PDMS-based microfluidic devices for biomedical applications. Microelectronic Engineering,
61, 907-914.

 

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : IMEPLaHC-11102018-PHOTO
  • Contact : elise.ghibaudo@minatec.grenoble-inp.fr

Biomimetic platforms for molecular and cellular studies

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offer n° 5

Summary: Embryo differentiation but also cancer and tissue homeostasis are supported by the
extracellular matrix (ECM) which has not only a structural but also a functional role: the presentation of
bioactive molecules. The first aim of this project is to mimic the natural presentation of a potent
osteoinductive growth factor, bone morphogenetic protein 2 (BMP-2), by immobilizing it on biomimetic
platforms, together with other ECM adhesion proteins and glycosaminoglycans, in particular heparan
sulfate (HS), as it is in vivo. The second aim is to study cellular responses to BMP-2 presented via the
biomimetic platforms.
Detailed subject: 15 years after FDA approved the clinical use of BMP-2 for spinal cord injuries, raises an
unmet industrial need of optimizing biomaterials for BMP-2 presentation and dose-control. For that is
important to totally understand which are the “molecular regulators” of BMP-2 activity in vivo. Fundamental
studies are therefore needed. We adopt a biomimetic approach to study at the molecular level BMP-2
binding to the natural ligand HS and the cellular responses to this type of presentation.
We design surfaces — biomimetic platforms — that present some selected components of the ECM bound
to them. On the biomimetic platforms we will graft HS, BMP-2 and also adhesion ligands (here called RGD
peptides), which permit cells spreading via cellular adhesion receptors: integrins (Fig 1).
We have shown that the presentation of BMP-2 via HS promotes the osteogenic differentiation of
progenitor cells (Migliorini et al. 2017). To understand the molecular mechanism behind the role of HS on
BMP-2 bioactivity we immobilize biotinylated HS with different chemical composition on SAv monolayer.
With quartz crystal microbalance with dissipation monitoring (QCM-D) we will characterize the binding of
biotiylated molecules on the top of SAv and calculate the average nanometrical distances between ligands.
After the characterization of the molecular assembling, we will use the well-defined biomimetic platforms for
studying cellular adhesion and differentiation with molecular biology methods.
Related Publication: Migliorini, E., P. Horn, T. Haraszti, SV Wegner, C. Hiepen, P. Knaus, PR. Richter,
and EA. Cavalcanti-Adam. 2017. ‘Enhanced biological activity of BMP-2 bound to surface-grafted heparan
sulfate’, Advanced Biosystems, 1: 1600041.
Background and skills: master student from last year university or engineering school interested in
glycobiology and/or physical chemistry. Aptitude for teamwork, good spoken and written English are
required. A “gratification” will be provided following the French law.
Supervisor : Migliorini Elisa
Laboratory : LMGP – CNRS-UMR 5628
Team/Group : IMBM
Contacts – E-mail : elisa.migliorini@grenoble-inp.fr Tel : +33 4 56529324 Web-page :
http://www.lmgp.grenoble-inp.fr/annuaire-/migliorini-elisa–869551.kjsp?RH=LMGP_ANNUAIRE
This project is part of the core interest of the main investigator, therefore a PhD thesis might follow the
master thesis. Please send a CV + a cover letter (including names/contact email of 2 referees) + the record
of your grades of the 2 past academic years to: elisa.migliorini@grenoble-inp.fr2018-19 Master proposalE.MIGLIORINIpdf

Deposition of oxide thin films via Spatial Atomic Layer Deposition: in search of high quality oxide semiconductors for electronic and optoelectronic applications

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offer n° 4

Project description
In ever more challenging environmental conditions an increasing amount of scientific work is devoted to the investigation of new materials for energy applications. But apart from finding better materials, new processing tools need to be developed allowing the scalable deposition of high quality materials at low temperatures. Atomic Layer Deposition (ALD) is an attractive candidate since it has unique unrivalled features including: i) a highly precise control of layer thickness; ii) the capability of depositing uniform and conformal coatings even on high aspect ratio features; and iii) the possibility to deposit high quality films at low temperatures. These qualities are a result of ALD mechanism: ALD is a particular case of Chemical Vapor Deposition (CVD) in which the reaction is restricted to the sample surface, thus being self-limited. This is achieved by exposing the sample to the reactants at different time, i.e. in a sequence of pulses. In this way, the metal precursors are supplied and react with the surface, ideally forming a monolayer. Excess precursor is then purged, usually by evacuation. The second precursor is then injected and reacts with the chemisorbed layer forming a monolayer of the desired material plus by-products that have to be purged along with the excess precursor. The cycle is then repeated the necessary number of times to obtain a very precise film thickness. But also as a result of the ALD particular mechanism, deposition rates are very low and vacuum processing makes it complicated and expensive to scale up.
Recently, a new approach to atomic layer deposition (ALD) has been developed that doesn’t require vacuum and is much faster than conventional ALD. This is achieved by separating the precursors in space rather than in time. This approach is most commonly called Spatial ALD (SALD). In the LMGP we have developing a novel atmospheric SALD system to fabricate active components for new generation solar cells and other applications, showing the potential of this novel technique for the fabrication of high quality materials that can be integrated into devices.
References: David Muñoz-Rojas*, and Judith L. MacManus-Driscoll. Materials Horizons, 1, 314-320, 2014.
Work requested (Subject internship)
The goal of this internship is to work within a team aiming at optimising the deposition of high quality oxide films, (Cu2O, ZnO, TiO2,…), by SALD. The final objective is to be able to tune the properties of the films both by adjusting the deposition parameters and via doping in order to use the materials in solar cells and TFTs, among others.
The physical properties (chemical composition, crystallographic structure, electrical conductivity, optical transparency, mechanical properties) of the films will be thoroughly investigated and optimized as well by using appropriate thermal annealing. The LMGP houses state of the art experimental equipments for investigating such properties. X-Ray diffraction (XRD), spectrophotometry, optical and electron microscopy will be routinely used to get a better understanding of the relationships between microstructure and physical properties for as-deposited and thermally treated films.
Location
Located in the heart of an exceptional scientific environment, the « Laboratoire des Matériaux et du Génie Physique » (LMGP) offers the applicant a rewarding place to work. The applicant will be integrated within a team and in close collaboration with surrounding laboratories (CEA-Grenoble, Institut Néel, SIMAP…).
LMGP Web Site: http://www.lmgp.grenoble-inp.EN/
Profile & requested skills
The candidate must have a good ranking (top 25%) in master or engineering school. Ideally, (s)he should have some experience in surface chemistry and materials sciences. We are looking for a highly motivated student who is interested to work in an inter-disciplinary group and on an interdisciplinary project. Interpersonal skills, dynamism, rigor and teamwork abilities will be appreciated. Candidates can be fluent either in English or in French.
Subject could be continued with a PhD thesis : YES
Allowance : Internship allowance will be provided.
CONTACT
David MUÑOZ-ROJAS: david.munoz-rojas@grenoble-inp.fr

Optimization of a Spatial Atomic Layer Deposition system by simulation

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offer n° 3

Project description
In ever more challenging environmental conditions an increasing amount of scientific work is devoted to the investigation of new materials for energy applications. But apart from finding better materials, new processing tools need to be developed allowing the scalable deposition of high quality materials at low temperatures. Atomic Layer Deposition (ALD) is an attractive candidate since it has unique unrivalled features including: i) a highly precise control of layer thickness; ii) the capability of depositing uniform and conformal coatings even on high aspect ratio features; and iii) the possibility to deposit high quality films at low temperatures. These qualities are a result of ALD mechanism: ALD is a particular case of Chemical Vapor Deposition (CVD) in which the reaction is restricted to the sample surface, thus being self-limited. This is achieved by exposing the sample to the reactants at different time, i.e. in a sequence of pulses. In this way, the metal precursors are supplied and react with the surface, ideally forming a monolayer. Excess precursor is then purged, usually by evacuation. The second precursor is then injected and reacts with the chemisorbed layer forming a monolayer of the desired material plus by-products that have to be purged along with the excess precursor. The cycle is then repeated the necessary number of times to obtain a very precise film thickness. But also as a result of the ALD particular mechanism, deposition rates are very low and vacuum processing makes it complicated and expensive to scale up.
Recently, a new approach to atomic layer deposition (ALD) has been developed that doesn’t require vacuum and is much faster than conventional ALD. This is achieved by separating the precursors in space rather than in time. This approach is most commonly called Spatial ALD (SALD). In the LMGP we have developing a novel atmospheric SALD system to fabricate active components for new generation solar cells and other applications, showing the potential of this novel technique for the fabrication of high quality materials that can be integrated into devices. Our system is based on an injection manifold head in which the different gas flows are distributed along parallel channels.
References: David Muñoz-Rojas*, and Judith L. MacManus-Driscoll. Materials Horizons, 1, 314-320, 2014.
Work requested (Subject internship)
The goal of this internship is to work within a team aiming at optimising the SALD system by using modelling approaches to optimize the injector head design. COMSOL will be used to evaluate the optimum head designs and the optimum deposition conditions for different head designs. The results obtained from the modelling will be use to fabricate improved head which will be tested in the system.
The LMGP has a long experience in modelling and houses state of the art experimental equipments for materials characterization.
Location
Located in the heart of an exceptional scientific environment, the « Laboratoire des Matériaux et du Génie Physique » (LMGP) offers the applicant a rewarding place to work. The applicant will be integrated within a team and in close collaboration with surrounding laboratories (CEA-Grenoble, Institut Néel, SIMAP…).
LMGP Web Site: http://www.lmgp.grenoble-inp.EN/
Profile & requested skills
The candidate must have a good ranking (top 25%) in master or engineering school. Ideally, (s)he should have some experience in surface chemistry and materials sciences. We are looking for a highly motivated student who is interested to work in an inter-disciplinary group and on an interdisciplinary project. Interpersonal skills
Subject could be continued with a PhD thesis : YES
Allowance : Internship allowance will be provided.
CONTACT
David MUÑOZ-ROJAS: david.munoz-rojas@grenoble-inp.fr

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