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(295) Production(s) de l'année 2019
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Synthesis of colloidal molecules: recent advances and perspectives 
Auteur(s): Merindol R., Duguet Etienne, Ravaine Serge
(Article) Publié:
Chemistry - An Asian Journal, vol. 14 p. (2019)
Ref HAL: hal-02294405_v1
PMID 31436370
DOI: 10.1002/asia.201900962
WoS: 000486348800001
Exporter : BibTex | endNote
7 Citations
Résumé: The synthesis and study of colloidal molecules, that is to say clusters of a small number of colloidal entities that resemble the configuration of atoms in molecules both in constituent size and angular arrangement to that of valence shell electron pair repulsion model‐related space‐filling geometries, are of continued and significant interest. The rapid development in this research area has attracted intense interest from researchers with diverse expertise, and numerous methods towards the synthesis of colloidal molecules have been reported. In this Minireview, we attempt to give an overview of these latest developments, classifying them in processes based on controlled phase separation phenomena, on controlled surface nucleation and growth, and on controlled clustering. We also discuss the potential use of colloidal molecules as building blocks to fabricate new hierarchically organized superstructures and functional materials.
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Layering Transition in Superfluid Helium Adsorbed on a Carbon Nanotube Mechanical Resonator
Auteur(s): Noury A., Vergara-Cruz Jorge, Morfin Pascal, Plaçais Bernard, Gordillo Maria, Boronat Jordi, Balibar Sebastien, Bachtold Adrian
(Article) Publié:
Physical Review Letters, vol. 122 p. (2019)
Texte intégral en Openaccess : 
Ref HAL: hal-02318660_v1
PMID 31075030
DOI: 10.1103/PhysRevLett.122.165301
WoS: 000466439100004
Exporter : BibTex | endNote
10 Citations
Résumé: Helium is recognized as a model system for the study of phase transitions. Of particular interest is the superfluid phase in two dimensions. We report measurements on superfluid helium films adsorbed on the surface of a suspended carbon nanotube. We measure the mechanical vibrations of the nanotube to probe the adsorbed helium film. We demonstrate the formation of helium layers up to five atoms thickness. Upon increasing the vapor pressure, we observe layer-by-layer growth with discontinuities in both the number of adsorbed atoms and the speed of the third sound in the adsorbed film. These hitherto unobserved discontinuities point to a series of first-order layering transitions. Our results show that helium multilayers adsorbed on a nanotube are of unprecedented quality compared to previous works. They pave the way to new studies of quantized superfluid vortex dynamics on cylindrical surfaces, of the Berezinskii-Kosterlitz-Thouless phase transition in this new geometry, and perhaps also to supersolidity in crystalline single layers as predicted in quantum Monte Carlo calculations.
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Magnetospectroscopy of double HgTe/CdHgTe QWs with inverted band structure in high magnetic fields up to 30 T
Auteur(s): Bovkun L.S., Ikonnikov A.V., Aleshkin V.Ya., Maremyanin K.V., Mikhailov N.N., Dvoretskii S.A., Krishtopenko S., Teppe F., Piot B.A., Potemski M., Orlita M., Gavrilenko V.I.
(Article) Publié:
Opto-Electronics Review, vol. 27 p.213-218 (2019)
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Landau level spectroscopy of valence bands in HgTe quantum wells: effects of symmetry lowering
Auteur(s): Bovkun L., Ikonnikov A., Aleshkin V Ya, Spirin K., Gavrilenko V., Mikhailov N., Dvoretskii S
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 31 p.145501 (2019)
Texte intégral en Openaccess : 
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4D compressive sensing holographic imaging of small moving objects with multiple illuminations
Auteur(s): Brodoline A., Rawat Nitin, Alexandre D., Cubedo Nicolas, Gross M.
(Article) Publié:
Applied Optics, vol. 58 p.G127 (2019)
Texte intégral en Openaccess :
Ref HAL: hal-02321405_v1
DOI: 10.1364/AO.58.00G127
WoS: 000502062900019
Exporter : BibTex | endNote
Résumé: In previous work [Opt. Lett. 44, 2827 (2019)], we presented a method based on digital holography and orthogonal matching pursuit, which is able to determine the 3D positions of small objects moving within a larger motionless object. Indeed, if the scattering density is sparse in direct 3D space, compressive sensing algorithms can be used. The method was validated by imaging red blood cell trajectories in the trunk vascular system of a zebrafish (Danio rerio) larva. We give here further details on the reconstruction technique and present a more robust version of the algorithm based on multiple illuminations.
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Suppressed Auger scattering and tunable light emission of Landau-quantized massless Kane electrons
Auteur(s): But D., Mittendorff M.
(Article) Publié:
Nature Photonics, vol. 100 p. (2019)
Texte intégral en Openaccess :
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Highly Reproducible Physiological Asymmetric Membrane with Freely Diffusing Embedded Proteins in a 3D‐Printed Microfluidic Setup
Auteur(s): Heo Paul, Ramakrishnan S., Coleman Jeff, Rothman James, Fleury Jean‐baptiste, Pincet Frédéric
(Article) Publié:
Small, vol. 15 p.1900725 (2019)
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