We describe a method for simultaneous measurements of the real and imaginary parts of the field scattered by single nanoparticles illuminated by a laser beam, exploiting a self-reference interferometric scheme relying on the fundamentals of the Optical Theorem. Results obtained with calibrated spheres of different materials are compared to the expected values obtained through a simplified analytical model without any free parameters, and the method is applied to a highly polydisperse water suspension of Poly(D,L-lactide-co-glycolide) nanoparticles. Advantages with respect to existing methods and possible applications are discussed.

Measuring the complex field scattered by single submicron particles / M.A.C. Potenza, T. Sanvito, A. Pullia. - In: AIP ADVANCES. - ISSN 2158-3226. - 5:11(2015 Nov), pp. 117222.117222-1-117222.117222-9. [10.1063/1.4935927]

Measuring the complex field scattered by single submicron particles

M.A.C. Potenza
;
T. Sanvito
Secondo
;
A. Pullia
Ultimo
2015

Abstract

We describe a method for simultaneous measurements of the real and imaginary parts of the field scattered by single nanoparticles illuminated by a laser beam, exploiting a self-reference interferometric scheme relying on the fundamentals of the Optical Theorem. Results obtained with calibrated spheres of different materials are compared to the expected values obtained through a simplified analytical model without any free parameters, and the method is applied to a highly polydisperse water suspension of Poly(D,L-lactide-co-glycolide) nanoparticles. Advantages with respect to existing methods and possible applications are discussed.
Physics and Astronomy (all)
Settore FIS/03 - Fisica della Materia
nov-2015
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/338984
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