3D exploration of light scattering from live cells in the presence of gold nanomarkers using holographic microscopyReport as inadecuate




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1 LKB Lhomond - Laboratoire Kastler Brossel 2 Institut Langevin ondes et images 3 IJM - Institut Jacques Monod 4 École Supérieure de Physique et Chimie Industrielles de la Ville de Paris 5 L2C - Laboratoire Charles Coulomb

Abstract : In this paper, we explore the 3D structure of light scattering from dark-field illuminated live 3T3 cells in the presence of 40 nm gold nanomarkers. For this purpose, we use a high resolution holographic microscope combining the off-axis heterodyne geometry and the phase-shifting acquisition of the digital holograms. A comparative study of the 3D reconstructions of the scattered fields allows us to locate the gold markers which yield, contrarily to the cell structures, well defined bright scattering patterns that are not angularly titled and clearly located along the optical axis z. This characterization is an unambiguous signature of the presence of gold biological nanomarkers, and validates the capability of digital holographic microscopy to discriminate them from background signals in live ce

Keywords : Digital Holography Three-dimensional Microscopy Gold Nanoparticle Biological Markers





Author: Fadwa Joud - N. Warnasooriya - P. Bun - Frédéric Verpillat - Sarah Suck - G. Tessier - Michael Atlan - Pierre Desbiolles - Mait

Source: https://hal.archives-ouvertes.fr/



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