Institut de Chimie Moléculaire et des Matériaux d'Orsay

The internship offers are listed here.

 

PhD co-advisor

New developments in X-ray absorption spectroscopy dedicated to innovation:The case of molecular memories for high density data storage

PhD main advisor : Anne Bleuzen

PhD student : Adama N'Diaye

Started on Oct. 1st 2018 ; Funded by ANR MagDiDi ; ED 571 "Sciences chimiques: Molécules, matériaux, instrumentation et biologie"

Summary

The increasing demands for improved data storage eventually require a technological mutation. Photoswitchable molecular materials offer appealing perspectives and the goal of this thesis project is to transform this attractive idea into a realistic alternative. Metal-metal charge-transfer inorganic compounds are very interesting candidates but their photoswitching properties are observed at too low temperature to be used in any application. One way to adjust their property is to modulate the fine distortions of their structure. The objective of this interdisciplinary (physics and chemistry) thesis is therefore to elucidate the relationship between slight structural distortions and photoswitching properties in model compounds: Prussian Blue Analogs (PBAs). To reach this goal we will develop a new tool based on the X-ray magnetic circular dichroism (XMCD) at the K-edge of transition metals. PBAs will be first used as model-compounds so that chemistry helps solving physical problems; they will enable to establish a methodology for the quantification of slight structural distortions from TM K-edge XMCD and to deeply understand physical processes originating TM K-edge XMCD. PBAs will then be considered as solutions to the problems currently meet in the area of data storage, this time the physical tools allowing chemistry to answer today’s technological challenges.

The subject described in details is available HERE .

 

Internships

Master 2 (5 months)

2018

Investigation of the origin of photomagnetism in Prussian Blue analogs

Inorganic syntheses ; Powder X-ray diffraction ; SQUID magnetometry ; Synchrotron experiments ; XAS data treatment

2016

A multiscale investigation of photoswitching in Prussian Blue analogs

Inorganic syntheses ; Powder X-ray diffraction ; SQUID magnetometry ; Electronic microscopy ; Synchrotron experiments ; XAS data treatment


L3 (7 months)

2020

Investigation of alkali cation-containing Prussian Blue analogs and derivatives by X-ray absorption spectroscopy

Synchrotron experiments ; XAS data treatment


L3 / 1st year magister (8 weeks)

2018

An X-ray absorption spectroscopy study of Prussian Blue analogs

XAS data treatment

2016

Syntheses and X-ray diffraction analyses of NiFe Prussian Blue analogs

Inorganic syntheses ; Powder X-ray diffraction ; Infrared spectroscopy ; thermal treatment

2016

Syntheses and characterization of Prussian Blue analogs — Effect of the thermal treatment for the formation of oxides and alloys

Inorganic syntheses ; Powder X-ray diffraction ; Infrared spectroscopy ; Thermal treatment

2016

NiFe Prussian Blue analogs used as a precursor of mixed oxides

Inorganic syntheses ; Thermal treatment ; Powder X-ray diffraction ; Electronic microscopy

2015

Investigation of the photomagnetic properites of a Prussian Blue analog using synchrotron radiation

Synchrotron experiments ; XAS data treatment


DUT (10 weeks)

2018

Syntheses and characterizations of the CoFe and NiCr Prussian Blue analogs

Inorganic syntheses ; Powder X-ray diffraction ; Infrared spectroscopy ; Electronic microscopy

2018

Syntheses and characterizations of the MnFe and CuFe Prussian Blue analogs

Inorganic syntheses ; Powder X-ray diffraction ; Infrared spectroscopy ; Electronic microscopy

   

PhD theses : Partial and/or targeted co-advising

On going

L. Altenschmidt

New materials with properties induced by the synergy between anisotropic shape and anisotropic organization of nanoparticles

Formation and accompagnying to X-ray absorption spectroscopy

2016

R. Moulin

Mesoporous silica matrices for developping multifunctional nanomaterials

Redaction of the manuscript, preparation of communications

2015

V. Trannoy

Toward the Elaboration of Recordable Magnetic Track : From Molecule to Material

Redaction of the manuscript, preparation of communications, co-advising of internships (L2), post-PhD accompanying