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Title: Three-dimensional micro-printing of temperature sensors based on up-conversion luminescence

The pronounced temperature dependence of up-conversion luminescence from nanoparticles doped with rare-earth elements enables local temperature measurements. By mixing these nanoparticles into a commercially available photoresist containing the low-fluorescence photo-initiator Irgacure 369, and by using three-dimensional direct laser writing, we show that micrometer sized local temperature sensors can be positioned lithographically as desired. Positioning is possible in pre-structured environments, e.g., within buried microfluidic channels or on optical or electronic chips. We use the latter as an example and demonstrate the measurement for both free space and waveguide-coupled excitation and detection. For the free space setting, we achieve a temperature standard deviation of 0.5 K at a time resolution of 1 s.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [1] ;  [4]
  1. Institute of Applied Physics and DFG-Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)
  2. Ian Wark Research Institute, University of South Australia, Mawson Lakes Blvd, Adelaide, SA 5095 (Australia)
  3. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), 76128 Karlsruhe (Germany)
  4. (KIT), 76128 Karlsruhe (Germany)
Publication Date:
OSTI Identifier:
22398829
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONVERSION; DETECTION; DOPED MATERIALS; EXCITATION; FLUORESCENCE; LASER RADIATION; NANOPARTICLES; RARE EARTHS; SENSORS; TEMPERATURE DEPENDENCE; TEMPERATURE MEASUREMENT; THREE-DIMENSIONAL CALCULATIONS; THREE-DIMENSIONAL LATTICES; TIME RESOLUTION