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Offers : 14

Design of X-ray interferometer for DNA holographic recording

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Start date : 1 January 2017

offer n° PsD-DRT-17-0015

The concept of holography has been proposed in the 40s by Dennis Gabor for electron microscopy. Then the invention of the laser made possible its application for authentication or for optical metrology. The molecular identification by imaging techniques applied to macromolecules (polymer or deoxyribonucleic acid DNA) is a complementary alternative methods for analysis and sequencing. LETI has already developed an extreme Ultraviolet interferometer, (? = 13.5nm, 92eV) for ultimate lithography studies [1]. Holography is also applied to electron microscopy [2] for materials characterization and for X-ray tomography [3]. In the frame of the expertise of our institute, this topic offers to design an X-ray interferometer capable of producing holograms of physical objects such as nanostructures with block copolymer or with organic materials as DNA.

  • Keywords : Life Sciences, Genomics, proteomics, Radiation-matter interactions, DOPT, Leti
  • Laboratory : DOPT / Leti
  • CEA code : PsD-DRT-17-0015
  • Contact : christophe.constancias@cea.fr

Biomimetic capture of odor molecules in microfluidic systems

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Start date : 1 February 2017

offer n° PsD-DRT-17-0023

The olfactory system in vertebrate is based on a limited set of neuronal receptors that stills enable the identification of a very large number of odor molecules. These molecules can be detected and identified even at extremely low concentration. Indeed, performances in odor perception of the animal kingdom outperform artificial sensors derived from micro and nano-technologies by several orders of magnitude (electronic noses, NEMS/MEMS sensors). Animal nose is lined with a layer of mucus. This thin viscous layer plays an essential role and remains to be better understood and emulated for the development of future innovative sensors.

The aim of the thesis is the development of a microfluidic system that will mimic the main characteristics of the transport chain of interest. The addition of a liquid phase component constitutes an original starting point for this work. In particular, aqueous solutions and gels materials with different properties will be evaluated so to realize a biomimetic “mucus”. This post-doc position, right at the interface between biology and microtechnology, aims at understanding and re-creating some of the functions observed in mammals for capture of odors molecules in small amount, The post-doc will share his time between LETI/Carnot Institute in Grenoble for the microfluidic and sensors part and Tours University/CNRS for the biological part and flux imaging experiments.

Keywords: microfluidics, microsystems, biomimetic.

Skills: General engineering, fluid mechanics, microfluidics, engineering and conception skills, interest in health and biology.

  • Keywords : Engineering science, Biotechnology, biophotonics, Instrumentation, DTBS, Leti
  • Laboratory : DTBS / Leti
  • CEA code : PsD-DRT-17-0023
  • Contact : yves.fouillet@cea.fr

Learning for cybersecurity in IoT

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Start date : 1 December 2016

offer n° PsD-DRT-16-0118

The goal of this project is to propose a lightweight Security Audit Module capable of making low-cost, pervasive IoT nodes tolerant to attacks. Targeted IoT nodes consist of a processor, a radio interface, and a set of sensors/actuators. The module will identify physical and logical attacks on the node and it will react accordingly, given a desired security level.

We will employ machine learning techniques to model normal and attack behavior starting with a set of hardware and software probes. To realise this, three steps are required:

The first is the definition and categorisation of the attack scenarios and security reactions that will be covered, given the specifications of an IoT node.

The second is the investigation of the software and hardware probes that can be used to determine attack cases.

The final step consists in studying low-cost classifiers for on-line attack detection, and evaluating their performance in terms of

e.g., false positive and false negative, algorithm complexity and overhead.

  • Keywords : Engineering science, Computer science and software, Electronics and microelectronics - Optoelectronics, DACLE, Leti
  • Laboratory : DACLE / Leti
  • CEA code : PsD-DRT-16-0118
  • Contact : anca.molnos@cea.fr

Wireless biological sensor using 2D materials (Graphene , Molybdenium disulfide)

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Start date : 1 November 2016

offer n° PsD-DRT-16-0115

The main goal of the post-doctoral position is the fabrication of a biological sensor using 2D materials and that can be remotely addressed thanks to a RF antenna simultaneously fabricated alongside the biosensor.

The post-doctoral associate will be in charge of the fabrication and characterization of the prototype. Starting from well-designed modelling, he/she will first establish a design architecture for the sensor and RF antenna. Once designed and sized, the post-doctoral associate will adapt existing transfer protocol of 2D materials to develop an innovative fabrication process for the sensor. He/she will then fabricate the first prototypes of the sensors. Consecutively he/she will validate first the remote addressing of the sensor via the RF antenna. Secondly he/she will lead biodétection tests to assess the sensitivity of the fabricated sensors. Finally, he/she will try to integrate Transition Metal Di-chalcogenides 2D materials (such as MoS2) to graphene sensors inside a hybrid 2D materials biological sensor. The goal here will be to boost operational sensitivity.

  • Keywords : Engineering science, Instrumentation, Solid state physics, surfaces and interfaces, DCOS, Leti
  • Laboratory : DCOS / Leti
  • CEA code : PsD-DRT-16-0115
  • Contact : thomas.alava@cea.fr

Encapsulation and interconnection of microelectronic components in a flexible and conformable film

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Start date : 1 April 2017

offer n° PsD-DRT-17-0004

The objective of the PostDoc will be the development of an innovative process of encapsulation and interconnection of heterogeneous electronic components in a multilayer flexible substrate.

The PostDoc will participate in the identification of flexible materials and processes associated taking into account existing technologies. The different steps of the integration process should be identified and studied, both from the perspective of technological feasibility as the scientific understanding of physical and chemical phenomena involved.

Tasks:

•Benchmarking: polymers

•Design / Simulation

•Definition of test vehicle

•Process development in clean room

•Characterization

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, DCOS, Leti
  • Laboratory : DCOS / Leti
  • CEA code : PsD-DRT-17-0004
  • Contact : jcsouriau@cea.fr
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