Chemically etched plastic optical fiber probe for near-field scanning optical microscopy in liquids

Kanat Dukenbayev, Anton Smirnov, Daniele Tosi, Giovanni Dietler, Sergey K. Sekatskii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Some preliminary results and experimental details of Near-field Scanning Optical Microscopy (NSOM) operation in liquids have been reported by us earlier. Here we present the first use of custom made polystyrene/poly (methyl methacrylate) (PMMA) optical fibers to assemble new NSOM probe/sensor for operation in liquids. Assembled NSOM probe has quite large quality factor Q ranging 2000-6000 in air, and 300-900 when immersed 0.2-0.3 mm deep into the water. Such montage demonstrates high mechanical durability permitting to scan different samples during many hours or even days, and overall low cost in comparison with NSOM probes based on glass optical fibers. A specially prepared optical fiber with 125 μm diameter (from Paradigm Optics Company, USA) (polystyrene core diameter is 0.85 μm, ncore=1.59 and PMMA cladding, n core =1.49) was chemically etched using a 9:1 mixture of dichloromethane and ethyl acetate. As result of the etching, a smooth and sharp tip is formed with a typical radius of the curvature equal to 50-170 nm. For completeness, earlier unpublished images of living Picocyanobacteria bacteria obtained using glass fiber-made NSOM probes are also presented.

Original languageEnglish
Title of host publicationImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XVII
EditorsDaniel L. Farkas, Attila Tarnok, James F. Leary
PublisherSPIE
ISBN (Electronic)9781510624047
DOIs
Publication statusPublished - Jan 1 2019
EventImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XVII 2019 - San Francisco, United States
Duration: Feb 4 2019Feb 6 2019

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume10881
ISSN (Print)1605-7422

Conference

ConferenceImaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XVII 2019
CountryUnited States
CitySan Francisco
Period2/4/192/6/19

Keywords

  • NSOM
  • NSOM probe in liquids
  • Polymer Optical Fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Dukenbayev, K., Smirnov, A., Tosi, D., Dietler, G., & Sekatskii, S. K. (2019). Chemically etched plastic optical fiber probe for near-field scanning optical microscopy in liquids. In D. L. Farkas, A. Tarnok, & J. F. Leary (Eds.), Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues XVII [108811U] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 10881). SPIE. https://doi.org/10.1117/12.2509098