Simultaneous size and zet-potential measurements of individual nanoparticles in dispersion using size-tunable pore sensors

Kozak, Darby, Anderson, Will, Vogel, Robert, Chen, Shaun, Antaw, Fiach and Trau, Matt (2012) Simultaneous size and zet-potential measurements of individual nanoparticles in dispersion using size-tunable pore sensors. Acs Nano, 6 8: 6990-6997. doi:10.1021/nn3020322


Author Kozak, Darby
Anderson, Will
Vogel, Robert
Chen, Shaun
Antaw, Fiach
Trau, Matt
Title Simultaneous size and zet-potential measurements of individual nanoparticles in dispersion using size-tunable pore sensors
Formatted title
Simultaneous size and ζ-potential measurements of individual nanoparticles in dispersion using size-tunable pore sensors
Journal name Acs Nano   Check publisher's open access policy
ISSN 1936-0851
1936-086X
Publication date 2012-08
Sub-type Article (original research)
DOI 10.1021/nn3020322
Volume 6
Issue 8
Start page 6990
End page 6997
Total pages 8
Place of publication Washington, DC United States
Publisher American Chemical Society
Collection year 2013
Language eng
Formatted abstract
The prospect of characterizing individual nanoparticles, molecules, or DNA base pairs has generated considerable interest in resistive pulse sensing. In addition to size and concentration analysis, this technique also has the capacity to measure the charge density of objects in situations where electrophoretic forces dominate their motion. Here we present a methodology to simultaneously extract, via appropriate theoretical models, the size and ζ-potential of objects from the resistive pulse signal they generate. The methodology was demonstrated using a size-tunable elastic pore sensor to measure a complex 'bimodal' suspension composed of two particle sets with different size and charge. Elastically tuning the size of the pore sensor, by stretching the elastic pore membrane, enables a larger sample size range to be analyzed, improves measurement sensitivity, and fine-tunes the forces acting on objects. This methodology represents a new approach for investigating and understanding the fundamental behavior of nanoscale dispersions
Keyword Nanopores
Coulter counter
Resistive pulse sensor
Elastic pore sensor
Stochastic sensing
Resistive Pulse Technique
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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