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Univ. Paris-Saclay

Service de Physique de l'Etat Condensé


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Tip functionalization for atomic force microscopy

Contact: VASSANT Simon, , simon.vassant@cea.fr, +33 1 69 08 95 97
Summary:
The internship focuses on the functionalization of probes for atomic force microscopy, made of pulled glass fibers. The student will manufacture the tips on a commercial device, and will have to develop techniques of functionalization of these probes with a single nanoparticle.
Possibility of continuation in PhD: Oui
Deadline for application:30/03/2020

Full description:
The Laboratory of Electronic and Photonic Organic (LEPO) of the Commissariat for Atomic Energy and Alternative Energies (CEA) is specialized in nanophotonics, microscopy with local probes and molecular self-assembly.

As part of the ANR project PlasmonISC (2020-2024), we wish to develop innovative methods of functionalization of probes for atomic force microscope. The probes will be made by pulling optical fiber. We aim to functionalized them by a metallic or magnetic nanoparticle.

The first part of the internship will involve the exploration of fiber pulling parameters to obtain a suitable tip shape. The fiber pulling will be done on a commercial machine, and the characterizations by optical microscopy and electron microscopy (after metallization).

The second part of the internship will concern the functionalization of the obtained probes. For this, several strategies will be considered. Some will require cleanroom micro / nano fabrication techniques and micromanipulation.
These functionalized probes will then be mounted on piezoelectric tuning for electrical (tuning fork resonance) and optical (dark field spectroscopy) characterizations.

The the long-term objective of the ANR project is to measure the influence of the nanoparticle on the relaxation rates of a single fluorescent molecule, with a particular interest in the inter-system transition rate to the triplet state.

We are looking for a candidate in Master 2, with a strong affinity for experimentation, and wishing to continue the internship with a thesis (whose funding is provided via the ANR project). A clean room experience is a plus.

Please send a CV and a short cover letter.
The internship will start ideally in February 2020.
Technics/methods used during the internship:
Fiber pulling with Co2 laser Optical microscopy Electronic microscopy Nano/micro fabrication in clean-room Micromanipulation

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