Imaging the cell membrane with surface plasmon resonance phase microscopy

R. Y. He*, Y. D. Su, G. L. Chang, Shean-Jen Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Molecular interactions occurring on or near cell membrane surfaces are expected to have different properties from those occurring in bulk solutions. In order to analyze molecular interactions between the cell membrane with biomolecules having no additional fluorescence labeling, a microscope based on the integration of surface plasmon resonance (SPR) and common-path phase-shift interferometry (PSI) techniques is developed and used to study the cell adhesion and migration on the biosurfaces. The surface plasmons are excited by light via the attenuated total reflection method. The common-path PSI technique has features of long-term stability, even when subjected to external disturbances. Hence, the developed SPR phase microscope meets the requirements of real-time kinetic imaging. The proposed common-path SPR-PSI microscope demonstrates a detection limit of 2×10-7 refractive index unit and a long-term phase stability of 2.5×10-4 n root mean square over four hours. The developed microscope is successfully applied to the real-time observation the live cell membranes with thrombomodulin proteins.

Original languageEnglish
Title of host publicationPlasmonics
Subtitle of host publicationNanoimaging, Nanofabrication, and their Applications II
DOIs
StatePublished - 21 Nov 2006
EventPlasmonics: Nanoimaging, Nanofabrication, and their Applications II - San Diego, CA, United States
Duration: 16 Aug 200617 Aug 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6324
ISSN (Print)0277-786X

Conference

ConferencePlasmonics: Nanoimaging, Nanofabrication, and their Applications II
Country/TerritoryUnited States
CitySan Diego, CA
Period16/08/0617/08/06

Keywords

  • Cell adhesion
  • Cell membrane imaging
  • Phase microscopy
  • Phase-shift interferometry
  • Surface plasmonic resonance

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