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Offers : 13

X-ray colour imaging with flat panel sources: a new architecture for tomography

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Start date : 1 October 2017

offer n° PsD-DRT-17-0074

The emergence of new distributed X-ray sources opens new perspectives in medical imaging. The objective is to propose an innovative architecture for tomographic acquisition associating the new distributed RX sources coupled to a small area spectrometric detectors with high spatial resolution. Such an inverse geometry tomography architecture will benefit from the contribution of spectrometric detectors in terms of image quality, dose reduction and quantification of biological tissues, while relaxing the constraint on the size of the sensor.

The work of the PostDoc will be to define the image acquisition chain and to develop and implement advanced reconstruction algorithms taking advantage of the information provided by the spectral detector. Problems related to the modality, such as low projection number, incomplete fields of view, metal artefacts or scattered radiation are to be taken into account.

  • Keywords : Engineering science, Life Sciences, Mathematics - Numerical analysis - Simulation, Medical imaging, DTBS, Leti
  • Laboratory : DTBS / Leti
  • CEA code : PsD-DRT-17-0074
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Biomaterials for medical applications

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Start date : 1 October 2017

offer n° PsD-DRT-17-0082

Many activities of Leti HEALTH focused on medical devices or drug delivery systems demand the use of innovative smart biomaterials. In particular, the post-doctoral fellow will be part of a Leti HEALTH/Clinatec project developing a resorbable medical device for the local delivery of Active Pharmaceutical Ingredients to treat relapse after glioblastoma surgery. Based on our previous know-how, and thanks to his/her expertise, (s)he will take in charge the formulation and the characterizations of the biodegradable material, and propose innovative solutions for the controlled release of the drugs from the matrices. (S)He will also work in close interactions with biologists and clinicians for the further evaluation of the materials.

  • Keywords : Life Sciences, Biotechnologies,nanobiology, Ultra-divided matter, Physical sciences for materials, DTBS, Leti
  • Laboratory : DTBS / Leti
  • CEA code : PsD-DRT-17-0082
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Design of fully integrated innovative ultrasound transceiver in silicon technologies

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Start date : 1 September 2017

offer n° PsD-DRT-17-0070

PMUT and CMUT technologies pave the way to the design of new ultrasound sensor systems with high density of sensor integration. In conjunction with dedicated conditioning and actuating electronic circuits, systems based on matrices of CMUT/PMUT transducers should be as performant as classical radar systems while consuming much less power.

The PostDoc will consist in designing a fully integrated conditioning and actuating circuit that will allow the dynamic adaptation of the sensor matrix at both reception and transmission. The close collaboration with technologists and radar experts should lead to an optimized solution in terms of power consumption that should be well suited to the CMUT/PMUT matrices approach.

Applicant should have a significant experience in the design of analog and mixed integrated circuits using cadence tools. The work will take place in a laboratory dedicated to the design of high performances analog and mixed integrated circuits for sensors, actuators and power management.

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, DACLE, Leti
  • Laboratory : DACLE / Leti
  • CEA code : PsD-DRT-17-0070
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Investigation of the ageing mechanisms in Silicon-based Lithium-ion batteries by coupling in situ and operando scattering techniques with electrochemical characterizations

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Start date : 1 April 2017

offer n° PsD-DRF-17-0006

An 18-month post-doctoral position is offered at the Institute for Nanoscience and Cryogenics (INAC) at Grenoble, France. INAC is a joint CEA-UGA research institute. It is a major actor in fundamental research on condensed matter, soft matter and cryogenics. Research programs on energy conversion and storage are focused on the characterization of the structure and properties of nanomaterials using cutting-edge techniques, including Large Scale Facilities.

The post-doctoral position is offered in the framework of a European H2020 project dedicated to develop Silicon-based Lithium-ion batteries with improved operation time. Our task is to provide understanding of ageing mechanisms in composite electrodes by means of cutting-edge in situ and operando scattering techniques on lab instruments and at world-class Large Scale Facilities (synchrotron radiation and neutrons), coupled with electrochemical characterizations.

  • Keywords : Engineering science, Materials and applications, Physical chemistry and electrochemistry, INAC, SyMMES
  • Laboratory : INAC / SyMMES
  • CEA code : PsD-DRF-17-0006
  • Contact :

Cleaning of graphene by pulsed plasma etching: optimization and multi-scale characterization by advanced photoemission techniques

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Start date : 1 May 2017

offer n° PsD-DRT-17-0037

The objective of this one-year post-doc is to address both issues by systematic, multi-scale surface analysis of transferred graphene surfaces treated by pulsed plasmas developped in the Clean-GRAPH ANR project (2013-2016). We will be employing advanced photoemission techniques to provide direct insights on chemical electronic states, work function and band structure.

Samples will be characterized using on the hand macro-scale, area-averaged high-resolution X-ray Photoelectron Spectroscopy (XPS) for chemical state fingerprinting and quantification; on the other hand, complementary microscopic analysis will be performed using PhotoElectron Emission Microscopy (PEEM) techniques, either in direct space to retrieve local work function information, or in reciprocal space (kPEEM) for imaging of the electronic band structure. kPEEM in particular will provide direct insights on the effectiveness of plasma cleaning and impact on electronic properties by qualitative and quantitative changes in the ?-band dispersion in k-space at the micron scale.

  • Keywords : Engineering science, Materials and applications, Solid state physics, surfaces and interfaces, DTSI, Leti
  • Laboratory : DTSI / Leti
  • CEA code : PsD-DRT-17-0037
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