{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T06:57:47Z","timestamp":1760425067152,"version":"build-2065373602"},"reference-count":14,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2011,8,29]],"date-time":"2011-08-29T00:00:00Z","timestamp":1314576000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We have developed a novel nanoscale temperature-measurement method using fluorescence in the near-field called Fluorescence Near-field Optics Thermal Nanoscopy (Fluor-NOTN). Fluor-NOTN enables the temperature distributions of nanoscale materials to be measured in vivo\/in situ. The proposed method measures temperature by detecting the temperature dependent fluorescence lifetimes of Cd\/Se Quantum Dots (QDs). For a high-sensitivity temperature measurement, the auto-fluorescence generated from a fiber probe should be reduced. In order to decrease the noise, we have fabricated a novel near-field optical-fiber probe by fusion-splicing a photonic crystal fiber (PCF) and a conventional single-mode fiber (SMF). The validity of the novel fiber probe was assessed experimentally by evaluating the auto-fluorescence spectra of the PCF. Due to the decrease of auto-fluorescence, a six- to ten-fold increase of S\/N in the near-field fluorescence lifetime detection was achieved with the newly fabricated fusion-spliced near-field optical fiber probe. Additionally, the near-field fluorescence lifetime of the quantum dots was successfully measured by the fabricated fusion-spliced near-field optical fiber probe at room temperature, and was estimated to be 10.0 ns.<\/jats:p>","DOI":"10.3390\/s110908358","type":"journal-article","created":{"date-parts":[[2011,8,30]],"date-time":"2011-08-30T06:04:23Z","timestamp":1314684263000},"page":"8358-8369","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["A Fusion-Spliced Near-Field Optical Fiber Probe Using Photonic Crystal Fiber for Nanoscale Thermometry Based on Fluorescence-Lifetime Measurement of Quantum Dots"],"prefix":"10.3390","volume":"11","author":[{"given":"Takuro","family":"Fujii","sequence":"first","affiliation":[{"name":"School of Integrated Design Engineering, Keio University, Kanagawa 223-8522, Japan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6391-7284","authenticated-orcid":false,"given":"Yoshihiro","family":"Taguchi","sequence":"additional","affiliation":[{"name":"Department of System Design Engineering, Keio University, Kanagawa 223-8522, Japan"}]},{"given":"Toshiharu","family":"Saiki","sequence":"additional","affiliation":[{"name":"Department of Electronics and Electrical Engineering, Keio University, Kanagawa 223-8522, Japan"}]},{"given":"Yuji","family":"Nagasaka","sequence":"additional","affiliation":[{"name":"Department of System Design Engineering, Keio University, Kanagawa 223-8522, Japan"}]}],"member":"1968","published-online":{"date-parts":[[2011,8,29]]},"reference":[{"key":"ref_1","first-page":"87","article-title":"Microscale real temperature measurement by the AFM using thermal feedback method","volume":"7","author":"Nakabeppu","year":"1999","journal-title":"Therm. Sci. Eng"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1115\/1.1454111","article-title":"Thermometry and thermal transport in micro\/nanoscale solid-state devices and structures","volume":"124","author":"Cahill","year":"2002","journal-title":"J. Heat Transf"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"599","DOI":"10.1038\/415599a","article-title":"Carbon nanothermometer containing gallium","volume":"415","author":"Gao","year":"2002","journal-title":"Nature"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"3681","DOI":"10.1088\/0957-4484\/17\/15\/010","article-title":"A novel method for practical temperature measurement with carbon nanotube","volume":"17","author":"Liu","year":"2006","journal-title":"Nanotechnology"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"3068","DOI":"10.1021\/nl101614s","article-title":"Nanoscale near-field imaging of excitons in single heterostructured nanorods","volume":"10","author":"Yoskovitz","year":"2010","journal-title":"Nano Lett"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1080\/15567260902820821","article-title":"Development of near-field fluorescence lifetime thermometry","volume":"13","author":"Taguchi","year":"2009","journal-title":"Nanoscale Microscale Thermophys. Eng"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Ohtsu, M (1998). Near-Field Nano\/Atom Optics and Technology, Springer.","DOI":"10.1007\/978-4-431-67937-0"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Lakowicz, JR (1999). Principles of Fluorescence Spectroscopy, Kluwer Academic\/Plenun Publishers. [2nd ed].","DOI":"10.1007\/978-1-4757-3061-6"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"085320","DOI":"10.1103\/PhysRevB.74.085320","article-title":"Size- and temperature-dependence of exciton lifetime in CdSe quantum dots","volume":"74","author":"Bode","year":"2006","journal-title":"Phys. Rev. B"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2773","DOI":"10.1063\/1.123307","article-title":"Near-field optical fiber probe optimized for illumination-collection hybrid mode operation","volume":"74","author":"Saiki","year":"1999","journal-title":"Appl. Phys. Lett"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"3563","DOI":"10.1109\/JLT.2007.907787","article-title":"Fusion splicing photonic crystal fibers and conventional single-mode fibers: Microhole collapse effect","volume":"25","author":"Xiao","year":"2007","journal-title":"J. Lightw. Technol"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"908","DOI":"10.1002\/smll.200700581","article-title":"High-spatial resolution surface-temperature mapping using fluorescent thermometry","volume":"4","author":"Kim","year":"2008","journal-title":"Small"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1023\/A:1015315304336","article-title":"Time-resolved fluorescence spectroscopy study on the photophysical behavior of quantum dots","volume":"12","author":"Fredrix","year":"2002","journal-title":"J. Fluoresc"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"113002","DOI":"10.1103\/PhysRevLett.96.113002","article-title":"Enhancement and quenching of single-molecule fluorescence","volume":"96","author":"Anger","year":"2006","journal-title":"Phys. Lev. 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