Séminaire

Mardi 21 Janvier 2020 à 11h00.

NANOGRANULAR MATERIALS OBTAINED BY GAS PHASE SYNTHESIS: MULTIMODAL MULTISCALE METROLOGY AND APPLICATIONS

''The tunable properties of nanoparticles (NPs) brings nanostructured materials at the forefront in energy[1] catalysis[2] microbiology[3], and medicine[4] domains. When NPs are assembled in 3D structures with some degree of porosity one obtains nanogranular materials (NGM)[5]. Here the NP retains part of its properties, but the interaction with the surrounding environment opens the possibility to tailor the system properties from the nano to the microscale[6]. NGM synthesis is an outstanding challenge to which gas phase synthesis may provide a promising green and affordable solution, enabling the synthesis of metal NPs[5] and oxide NPs[7,8] on a wide variety of substrates[9]. The talk presents recent results on the synthesis and multimodal multiscale metrology of NPs and NGM obtained by gas phase deposition[10]. As shown in Fig.1, the electronic, morphological, mechanical and optical properties of NGM are unveiled to explain the behavior of the NGM for different applications such as antimicrobial coatings[3,11], transparent conductive oxides[1], photoacoustic nanofluidic sensors[12] and distributed membranes for gas-separation[5].

References
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[3] G. Benetti et al. Nanoscale 2019, 11, 1626.
[4] D. Pedone et al. Chem. Soc. Rev. 2017, 46, 4951.
[5] G. Benetti et al. J. Phys. Chem. C 2017, 121, 22434.
[6] A. V. Singh et al. PLoS ONE 2011, 6, e25029.
[7] E. Cavaliere et al. Nanomaterials 2017, 7, 442.
[8] B. D. Fraters et al. J. Alloys Compd. 2014, 615, S467.
[9] C. Marega et al. Nanotechnology 2015, 26, 075501.
[10] S. Peli et al. J. Phys. Chem. C 2016, 120, 4673.
[11] E. Cavaliere et al. Nanomedicine Nanotechnol. Biol. Med. 2015, 11, 1417.
[12] G. Benetti et al. ACS Appl. Mater. Interfaces 2018, 10, 27947.
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