Journal
ANALYTICAL CHEMISTRY
Volume 73, Issue 10, Pages 2153-2156Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac001538q
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Electrogenerated chemiluminescence at electrodes with effective diameters down to 155 nm was used as a stable light source for near-field scanning optical microscopy imaging of an interdigitated array and a submicrometer size test substrate. Light was generated in a thin (similar to 500 pm) layer of an aqueous solution of 15 mM RU(bpy)(3)(2+) and 100 mM tri-n-propylamine in a pH 7.5 buffer. The resolution obtained was compared to that found with a micrometer size electrode. The shear force from the tip attached to a quartz tuning fork was used to monitor and control the tip-to-substrate separation within the near field regime.
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