A microfluidic channel flow cell for electrochemical ESR.

摘要: The design, fabrication, and characterization of microfluidic channel flow devices for in situ simultaneous hydrodynamic electrochemical ESR is reported. microelectrochemical reactors consist gold film electrodes situated within rectangular ducts height 350 microm widths the range 500-2000 microm. small dimensions channels result minimal dielectric loss when centralized a cylindrical TE011 resonant cavity, leading to high level sensitivity. This demonstrated by using one-electron oxidation N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) acetonitrile as model system, wherein spectra obtained corresponding stable radical cation are signal-to-noise ratio. Signal intensity measured function rate this behavior validated means 3-dimensional numerical modeling profile.