Surface coatings for solid-state nanopores
نویسندگان
چکیده
منابع مشابه
Probing surface charge fluctuations with solid-state nanopores.
We identify a contribution to the ionic current noise spectrum in solid-state nanopores that exceeds all other noise sources in the frequency band 0.1-10 kHz. Experimental studies of the dependence of this excess noise on pH and electrolyte concentration indicate that the noise arises from surface charge fluctuations. A quantitative model based on surface functional group protonization predicts...
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We study ionic current fluctuations in solid-state nanopores over a wide frequency range and present a complete description of the noise characteristics. At low frequencies (f approximately < 100 Hz) we observe 1/f-type of noise. We analyze this low-frequency noise at different salt concentrations and find that the noise power remarkably scales linearly with the inverse number of charge carrier...
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متن کاملLow-frequency noise in solid-state nanopores.
Low-frequency ionic current noise in solid-state nanopores imposes a limitation on the time resolution achieved in translocation experiments. Recently, this 1/f noise was described as obeying Hooge's phenomenological relation, where the noise scales inversely with the number of charge carriers present. Here, we consider an alternative model in which the low-frequency noise originates from surfa...
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ژورنال
عنوان ژورنال: Nanoscale
سال: 2019
ISSN: 2040-3364,2040-3372
DOI: 10.1039/c9nr05367k