&#950;-potential determination using a ZetaMeter-Dynamic Speckle assembly

Rolando J. González-Peña; Orlando L. Sánchez-Muñoz; René A. Martínez-Celorio; Rosa M. Cibrián; Rosario Salvador-Palmer; Jesús Salgado

doi:10.1117/12.977785

11 September 2012 ζ-potential determination using a ZetaMeter-Dynamic Speckle assembly

Rolando J. González-Peña, Orlando L. Sánchez-Muñoz, René A. Martínez-Celorio, Rosa M. Cibrián, Rosario Salvador-Palmer, Jesús Salgado

Author Affiliations +

Proceedings Volume 8413, Speckle 2012: V International Conference on Speckle Metrology; 84131H (2012) https://doi.org/10.1117/12.977785
Event: SPECKLE 2012: V International Conference on Speckle Metrology, 2012, Vigo, Spain

Abstract

Electrophoretic mobility and ζ-potential are important physical parameters for the characterization of micro- and nanosystems. In this communication we describe a new method for determining the ζ-potential through the assembly of two well known techniques: free electrophoresis and Dynamic Speckle. When coherent light passes through a fluid having scattering centres, the far field interference originates a speckled image. If the scattering centres are contained within the cylindrical electrophoresis cell of a ZetaMeter and are forced to move in an orderly way under the action of an external electric field, the time variation of the light intensity in the far field speckle images follows a temporal autocorrelation function g(τ). The corresponding correlation time can then be obtained and related with the velocity, from which the electrophoretic mobility and the ζ-potential of the scattering centres can be determined. We have applied this method to microparticles, like natural air-floated silica and two classes of bioceramics, hydroxyapatite and biphasic calcium phosphate. For comparison, we analysed the same samples in parallel using a commercial Zetasizer Nano from Malvern Instruments. The values of ζ-potential determined using the two techniques were the same within ~3% error. These results validate our new method as a useful and efficient alternative for ζ-potential determination of particles, at least within the micrometer scale.

Citation Download Citation

Rolando J. González-Peña, Orlando L. Sánchez-Muñoz, René A. Martínez-Celorio, Rosa M. Cibrián, Rosario Salvador-Palmer, and Jesús Salgado "ζ-potential determination using a ZetaMeter-Dynamic Speckle assembly", Proc. SPIE 8413, Speckle 2012: V International Conference on Speckle Metrology, 84131H (11 September 2012); https://doi.org/10.1117/12.977785

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available