Nanopipet-Based Resistive Pulse Sensing to Follow Alterations in the Size and Concentration of Nanoparticles During Membrane Filtration

Péter Terejánszky, István Makra, Alda Lukács, R. Gyurcsányi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We propose a calibration-free resistive pulse sensing (RPS) methodology based on nanopipets to follow the size and concentration changes of nanoparticles during size-selective separation processes. The study was performed with monodisperse latex nanoparticles and their mixtures that were subjected to separation procedures such as filtration through track-etch membranes of various pore diameters as well as centrifugal filtration. The RPS measurements were found to be suitable to determine both the recovery of the nanoparticles after filtration as well as subtle changes in their size distribution. Filtration through track-etch membranes preserved the mean size of the nanoparticles while their recovery was affected by the size of the pore and coexistence of larger nanoparticle fractions in the sample. Centrifugal filtration resulted in the appearance of aggregates.

Original languageEnglish
Pages (from-to)595-601
Number of pages7
JournalElectroanalysis
Volume27
Issue number3
DOIs
Publication statusPublished - Mar 1 2015

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Nanoparticles
Membranes
Recovery
Latex
Latexes
Calibration

Keywords

  • Centrifugal filtration
  • Membrane filtration
  • Nanoparticles
  • Resistive pulse sensing
  • Track-etch membranes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Cite this

Nanopipet-Based Resistive Pulse Sensing to Follow Alterations in the Size and Concentration of Nanoparticles During Membrane Filtration. / Terejánszky, Péter; Makra, István; Lukács, Alda; Gyurcsányi, R.

In: Electroanalysis, Vol. 27, No. 3, 01.03.2015, p. 595-601.

Research output: Contribution to journalArticle

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