http://www.cnr.it/ontology/cnr/individuo/prodotto/ID3401

Optical nanotomography of anisotropic fluids (Articolo in rivista)

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Label

Anno

Alternative label

De Luca, A; Barna, V; Atherton, TJ; Carbone, G; Sousa, ME; Rosenblatt, C (2008)
Optical nanotomography of anisotropic fluids
in Nature physics (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

De Luca, A; Barna, V; Atherton, TJ; Carbone, G; Sousa, ME; Rosenblatt, C (literal)

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Rivista

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

\"[Atherton, Timothy J.; Rosenblatt, Charles] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA; [De Luca, Antonio; Carbone, Giovanni] Univ Calabria, Dept Phys, CNR INFM LiCryL, I-87036 Arcavacata Di Rende, CS, Italy; [Barna, Valentin] Univ Bucharest, Fac Phys, Bucharest 077125, Magurele, Romania; [Sousa, Matthew E.] 3M Corp, St Paul, MN 55144 USA (literal)

Titolo

Abstract

The physical properties of anisotropic fluids can be manipulated on very short length scales of 100nm or less by appropriate treatment of the confining substrate(s)(1,2). This facilitates the use of ordered fluids in a variety of scientific endeavours and applications. Although future advances will require a complete understanding of their structure at the nanoscale level, high-resolution three-dimensional optical imaging of the fluid's molecular orientation profile is beyond the reach of extant techniques(3). Here, we report a powerful imaging approach based on the collection of transmitted light in the far field that is emitted from a light source with a subwavelength aperture. We acquire high-resolution images by raster-scanning, at multiple heights, an optical fibre immersed inside a thin layer of anisotropic fluid, thereby facilitating the visualization of the fluid's structure with a resolvable volume similar to 1/500 of that attainable by current methods. This novel technique offers the intriguing possibility of three-dimensional nanoscale reconstruction of a variety of soft materials, here the first direct visualization and measurement of the liquid-crystal molecular orientation relaxation length. (literal)

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