Recently, optical tweezing has been used to provide a method for microrheology addressed to measure the rheological properties of small volumes of samples. In this work, we corroborate this emerging field of microrheology by using these optical methods for the characterization of polyelectrolyte solutions with very low viscoelasticity. The influence of polyelectrolyte (i.e., polyacrylamide, PAM) concentration, specifically its aging, of the salt concentration is shown. The close agreement of the technique with classical bulk rheological measurements is demonstrated, illustrating the advantages of the technique.
Using Optical Tweezers for the Characterization of Polyelectrolyte Solutions with Very Low Viscoelasticity / Pommella, Angelo; Preziosi, Valentina; Caserta, Sergio; Jonathan M., Cooper; Guido, Stefano; Manlio, Tassieri. - In: LANGMUIR. - ISSN 0743-7463. - 29:(2013), pp. 9224-9230. [10.1021/la4015948]
Using Optical Tweezers for the Characterization of Polyelectrolyte Solutions with Very Low Viscoelasticity
POMMELLA, ANGELO;PREZIOSI, VALENTINA;CASERTA, Sergio;GUIDO, STEFANO;
2013
Abstract
Recently, optical tweezing has been used to provide a method for microrheology addressed to measure the rheological properties of small volumes of samples. In this work, we corroborate this emerging field of microrheology by using these optical methods for the characterization of polyelectrolyte solutions with very low viscoelasticity. The influence of polyelectrolyte (i.e., polyacrylamide, PAM) concentration, specifically its aging, of the salt concentration is shown. The close agreement of the technique with classical bulk rheological measurements is demonstrated, illustrating the advantages of the technique.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
