Enhanced Electroanalytical Sensitivity via Interface Miniaturisation: Ion Transfer Voltammetry at an Array of Nanometre Liquid–Liquid Interfaces
MetadataShow full item record
The benefit of miniaturization towards the nanoscale of electroanalytical systems was evaluated by assessment of the sensitivity of the response. Ion transfer voltammetry across the interface between two immiscible electrolyte solutions (ITIES) was employed as the basis for detection of nonredoxactive ions. The analytical sensitivity increased on miniaturisation of the interface from millimetre-, to micrometre-, to nanometre-scale, with an improvement in sensitivity of more than three orders of magnitude. This is due to the enhanced mass transport via convergent diffusion as the size of the ITIES is minimised. These results illustrate the benefit of miniaturisation of electrochemical detection methods to the nanoscale.
Showing items related by title, author, creator and subject.
Electrochemical behaviour and voltammetric sensitivity at arrays of nanoscale interfaces between immiscible liquidsRimboud, Mickael; Hart, Robert; Becker, Thomas; Arrigan, Damien (2011)Arrays of nanoscale interfaces between immiscible electrolyte solutions were formed using siliconnitride nanopore array membranes. Nanopores in the range from 75 nm radius down to 17 nm radiuswere used to form the ...
Herzog, G.; Flynn, S.; Arrigan, Damien (2011)We report here the electrochemical sensing of macromolecules, such as polyLysine dendrimers, at the polarised liquid | liquid interface. Electrochemistry at the liquid | liquid interface is a powerful analytical technique ...
Herzog, G.; Eichelmann-Daly, P.; Arrigan, Damien (2010)We report here the influence of chemical denaturation of haemoglobin on its electrochemical behaviour at the polarised liquid|liquid interface. Denaturation with urea resulted in a modification of the haemoglobin ...