Using electrical chemical impedance spectroscopy to determine nanocapillary geometry and differential capacitance by developing a variable topology network circuit model
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Using electrical chemical impedance spectroscopy to determine nanocapillary geometry and differential capacitance by developing a variable topology network circuit model
Nanocapillaries nd increasing use in a variety of applications including, protein translo- cation dynamics, protein sequencing, and other nano uidic studies. All of these appli- cations are a ected by the geometry of the nanopore and the molecular species found within. This dissertation develops a new equivalent circuit model to determine the geometry of nanocapillaries. This model is derived to include the e ects of a varying nanocapillary radius, along with the capacitive double layer within the nanocpaillary. The model is tested by using electrochemical impedance spectroscopy on a nanocapil- lary array membrane. The resulting values extracted from the model t are consistent with the manufacturer's speci ed geometry. The model is then further developed to determine the impedance of proteins. This is accomplished by modeling the protein as a cylinder and inserting this into our above mentioned model. By exploiting alternat- ing regions of surface charge density on the protein this model will allow for the rapid sequencing of proteins.
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Chemistry and Chemical Biology
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Rutgers University Electronic Theses and Dissertations
Rutgers University. Graduate School - New Brunswick
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