Fluorescence imaging technique of surface electrostatic potential using evanescent wave illumination

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Abstract

The electrostatic potential at a solid-liquid interface (i.e., the zeta potential) is a dominant factor in electric adsorption and microchannel flows. This study proposes a fluorescence-based technique for obtaining color image of modified surface and directly measuring zeta potential. The evanescent wave is used as an excitation light for anions and cations that emit fluorescence at two different wavelengths. Patterns of self-assembled monolayers in a closed microchannel were visualized and their zeta potential distributions were measured. This technique will contribute to development of technical applications in the fields of microfluidics and material science.

Original languageEnglish
Article number234104
JournalApplied Physics Letters
Volume95
Issue number23
DOIs
Publication statusPublished - 2009

Fingerprint

evanescent waves
imaging techniques
illumination
electrostatics
fluorescence
microchannels
liquid-solid interfaces
materials science
anions
color
cations
adsorption
wavelengths
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Fluorescence imaging technique of surface electrostatic potential using evanescent wave illumination",
abstract = "The electrostatic potential at a solid-liquid interface (i.e., the zeta potential) is a dominant factor in electric adsorption and microchannel flows. This study proposes a fluorescence-based technique for obtaining color image of modified surface and directly measuring zeta potential. The evanescent wave is used as an excitation light for anions and cations that emit fluorescence at two different wavelengths. Patterns of self-assembled monolayers in a closed microchannel were visualized and their zeta potential distributions were measured. This technique will contribute to development of technical applications in the fields of microfluidics and material science.",
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AU - Kazoe, Yutaka

AU - Miyakawa, Shu

AU - Miki, Norihisa

AU - Sato, Yohei

PY - 2009

Y1 - 2009

N2 - The electrostatic potential at a solid-liquid interface (i.e., the zeta potential) is a dominant factor in electric adsorption and microchannel flows. This study proposes a fluorescence-based technique for obtaining color image of modified surface and directly measuring zeta potential. The evanescent wave is used as an excitation light for anions and cations that emit fluorescence at two different wavelengths. Patterns of self-assembled monolayers in a closed microchannel were visualized and their zeta potential distributions were measured. This technique will contribute to development of technical applications in the fields of microfluidics and material science.

AB - The electrostatic potential at a solid-liquid interface (i.e., the zeta potential) is a dominant factor in electric adsorption and microchannel flows. This study proposes a fluorescence-based technique for obtaining color image of modified surface and directly measuring zeta potential. The evanescent wave is used as an excitation light for anions and cations that emit fluorescence at two different wavelengths. Patterns of self-assembled monolayers in a closed microchannel were visualized and their zeta potential distributions were measured. This technique will contribute to development of technical applications in the fields of microfluidics and material science.

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JO - Applied Physics Letters

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IS - 23

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ER -