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Download fileElectrokinetic Manipulation of Silver and Platinum Nanoparticles and Their Stochastic Electrochemical Detection
journal contribution
posted on 2017-08-07, 00:00 authored by Jason Bonezzi, Tulashi Luitel, Aliaksei BoikaElectrokinetic phenomena such as
dielectrophoresis and electrothermal
fluid flow are used to increase the rate of mass transfer of silver
and platinum nanoparticles and improve their stochastic electrochemical
detection. These phenomena are induced by applying a high frequency
alternating current (ac) waveform between a counter electrode and
a working disk microelectrode. By recording chronoamperograms at room
temperature and various ac powers, it is shown that the ac heating
leads to an increase in the collision frequency of studied nanoparticles
with working electrode surface by a factor of ∼101–103 as well as the increase in the magnitude of
the measured faradaic response. It is suggested that the developed
methodology could be used in the future to improve the detection of
ultralow concentrations of various important bioanalytes.
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ac heatingStochastic Electrochemical Detection Electrokinetic phenomenacounter electrodemass transferdisk microelectroderoom temperatureac powersrecording chronoamperogramsfaradaic responseelectrode surfaceplatinum nanoparticlescollision frequencyElectrokinetic ManipulationPlatinum Nanoparticleselectrothermal fluid flowultralow concentrationselectrochemical detection