DEVELOPMENT OF NANOSCALE TEMEPERATURE MEASUREMENT TECHNIQUE USING NEAR-FIELD FLUORESCENCE
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Accession number;07A0043213
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| Title;DEVELOPMENT OF NANOSCALE TEMEPERATURE MEASUREMENT TECHNIQUE USING NEAR-FIELD FLUORESCENCE |
| Author;
TAGUCHI YOSHIHIRO
(Keio Univ., JPN)
JIGAMI TAIRA
(Keio Univ., JPN)
SAIKI TOSHIHARU
(Keio Univ., JPN)
NAGASAKA YUJI
(Keio Univ., JPN)
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Journal Title;Thermophys Prop
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Journal Code:X0031A
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ISSN:0911-1743
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VOL.27th;NO.;PAGE.33-35(2006)
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| Figure&Table&Reference;FIG.5, REF.8 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;A nanoscale thermal system design, especially precise measurement of temperature distribution in microfabricated devices using novel nano materials has been increasingly important along with the development of nanotechnology. We have proposed a new approach toward an optical nanoscale temperature measurement method using near-field optics and fluorescence thermometry, namely Fluor-NOTN (Fluorescent Near-field Optics Thermal Nanoscopy). The topographic image and the temperature dependence of a fluorescently modified sample, excited by near-field light, are monitored simultaneously. Fluor-NOTN targets spatial resolution beyond 100nm (up to 10nm), surpassing the diffraction limit of light, and is applicable to measure the local temperature of nano-scale materials in situ. The characteristics of Fluor-NOTN are summarized as follows: it is possible (1) to observe the nano-scale temperature distribution and heat transport phenomenon (the spatial resolution up to 10nm); (2) to measure the topographic image of sample simultaneously in-situ condition; and (3) to analyze the molecular composition using fluorescent probe. In this paper, the temperature dependence of Cy3 fluorescent dye is verified near room temperature (298K to 308K). A Cy3 mono-dispersed sample of permalloy (Ni81Fe19) wire heater, 500nm in width and 100nm in thickness, is designed and fabricated. Localized temperature gradient of .DELTA.T=4K within a submicron distance from the heater was successfully detected by near-field fluorescence in 100nm spatial resolution. Furthermore, we have successfully developed a thermometry using near-field fluorescence life time in frequency domain. In order to verify the applicability of near-field fluorescence life time detection, life time of .TAU.=18 ns of Qdot was measured in near-field by 500nm apertured fiber. (author abst.) |
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