High resolution fluorescence imaging with cantilevered near‐field fiber optic probes
作者:
Chad E. Talley,
Gregory A. Cooksey,
Robert C. Dunn,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 25
页码: 3809-3811
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117112
出版商: AIP
数据来源: AIP
摘要:
High resolution near‐field fluorescence and topology images of intact neurons are reported using a cantilevered near‐field fiber optic probe. A bend is introduced into a normal geometry near‐field tip, allowing the probe to be used in a tapping‐mode arrangement, similar to tapping‐mode atomic force microscopy. Features with a full width at half‐maximum of 140 nm are observed in the near‐field fluorescence image, demonstrating the subdiffraction limit spatial resolution possible with the cantilevered near‐field probe design. Characteristics of the cantilevered tips include resonances between 30 and 60 kHz,Qfactors greater than 100, and measured spring constants of 300 to 400 N/m. ©1996 American Institute of Physics.
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