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SIMS21, Poland 2017 - Serge Della Negra abstract

Serge Della Negra oral presentation (PB1-Mon3-1-4)

Andromede, a new tool to produce and analyze nano-objects

Serge Della Negra1, Jean Lesrel1, Michael Eller2, Emile Schweikert2, Donia Baklouti3, Rosario Brunetto3, Martine Caroff4, Marin Chabot1, Sandrine Courtin5, Vincent Huc6, Elodie Verzeroli7

1 IPNOInstitut de Physique nucléaire, UMR8608, Université Paris Saclay - CNRS, Georges Clémenceau, 91406 Orsay, France
2 Department of Chemistry, Texas A&M University, , TX 77843-3144 College Station, United States
3 Institut d’Astrophysique Spatiale, UMR8617, Université Paris Saclay, , 91405 Orsay, France
4 LPS-Biosciences Université Paris-Sud,, , 91400 Orsay, France
5 Institut Pluridisciplinaire Hubert CURIEN, Univ. de Strasbourg, , 67037 Stasbourg, France
6 Institut de Chimie Moléculaire et des Matériaux d’Orsay, UMR8182, Univ Paris Saclay, , 91405 Orsay, France
7 Orsay Physics, ZAC Saint Charles, 3ième Avenue, 13710 Fuveau, France

The Andromede project (ANR-10-EQPX-23) is a new instrument for surface modification, analysis and ionic imaging mass spectrometry using the impact of ions in the MeV range [1]. The atomic, polyatomic, molecular and nano-particle ion beams are produced with two ion sources, a liquid metal ion source (LMIS) and an electron cyclotron resonance source (ECR). The ECR is a Pantechnik Microgan which has a RF frequency of 10GHz and an adjustement of the magnetic field which permit to produce multicharged atomic and molecular ion beams like fullerene C603+. The LMIS column is provided by Orsay Physics. This new ion source named NAPIS (Nano Particle Ion Source) is capable of producing gold clusters and nanoparticles. These ion beams are accelerated to high energy by a NEC Pelletron® 4MeV electrostatic accelerator. Using this wide range of probes in the MeV energy range, MeV atomic and cluster secondary ion mass spectrometry, material modifications, Molecular Physics, Astro-chemistry and Nuclear Astrophysics in the low energy domain, can all be performed in one location. The Andromede instrument is equipped with two particle beam lines after magnetic selection at 1.29° and 90°. The first beam line is dedicated to molecule and nanoparticle beams and surface analysis. The second beam line is dedicated to atomic and light molecular ion beams and nuclear astrophysics experiment at low energy (STELLA experiment) and molecular physics (AGAT experiment) .

The main goal of the Andromede project is to create a new imaging mass spectrometer using MeV heavy clusters. Indeed, in SIMS the use of high energy cluster ions in the MeV range has shown to increase secondary molecular ion yields for biological samples by 100 times compared to keV cluster ions [2]. The use of massive clusters (e.g. Au4004+) permits another gain which allows the detection of a few tens molecular ions per projectile impact corresponding to a volume of 1000 nm3. These results suggest that MeV cluster nanoparticle SIMS is a suitable tool for molecular surface mass spectrometry. The design of this new instrument includes a high resolution mass spectrometer (EVE), incorporating the localization of the NP impacts with Electron and proton Emission microscope; this last point was developed in collaboration with the TAMU group [3].

The Andromede facility is now in operation. The specifications of this new instrument obtained during the commissioning and the first results obtained recently will be presented.

[1] M.J. Eller et al, N.I.M. B, 365, 2015, 367-370

[2] S. Della-Negra, et al, Surf. Interface Anal., 43, 2011, 62-65.

[3] M. J. Eller et al Rev. Sci. Instrum. 84, 2013, 103706.