Scanning optical microscopy with an electrogenerated chemiluminescent light source at a nanometer tip

Y. Zu, Z. Ding, J. Zhou, Y. Lee, A. J. Bard

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

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 (∼500 μm) layer of an aqueous solution of 15 mM Ru(bpy)32+ 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.

Original languageEnglish
Pages (from-to)2153-2156
Number of pages4
JournalAnalytical Chemistry
Volume73
Issue number10
DOIs
StatePublished - 15 May 2001

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