Reflective photoluminescence fiber temperature probe based on the CdSe/ZnS quantum dot thin film

Review of Temperature Measurement Techniques

“…Such versatile fabrication processes can greatly downsize the expenses, pertaining to facility complexity [31][32][33][34][35][36][37][38]. Other QDs delivery methods include electrostatic coating, UV curable solutions, as well as sol-gel approach [38][39][40][41][42]. According to the airy diffraction theory, the minimum spatial resolution that can be detected by a camera (x) is related to the observed wavelength (λ) by Equation 1.…”

“…The average temperature precision was enhanced at a higher number of QD particles, according to Li et al [44]. Wang et al [39] developed a miniaturized temperature sensor in the form of a reflective fiber for high temperature applications. In a similar line of work to Wang et al [39], Bueno et al [37] developed a photonic planar waveguide temperature sensor using nanocomposites of CdTe and CdSe, which were embedded in PMMA.…”

“…Wang et al [39] developed a miniaturized temperature sensor in the form of a reflective fiber for high temperature applications. In a similar line of work to Wang et al [39], Bueno et al [37] developed a photonic planar waveguide temperature sensor using nanocomposites of CdTe and CdSe, which were embedded in PMMA. QDs-PMMA nanocomposites have a peak spectral emission at a shorter wavelength than colloidal solutions of QDs, due to the particles agglomeration and waveguide effects introduced by PMMA matrix.…”

Optical fiber pH sensor based on gold nanoparticles into polymeric coatings

“…Additionally, the use of nanocoatings combined with optical fiber can enhance the sensing properties and allow novel functionalities [4][5][6]. Many different optical fiber sensing structures based on nanostructured films such as long period gratings (LPGs) [7], interferometric cavities [8], fiber Bragg gratings (FBGs) [9,10], resonance-based sensors [11][12][13][14] or fluorescence-based sensors [15][16][17] have been developed recently, but those that use spectral techniques have shown a better performance because their measurements are more reliable and highly independent from optical power fluctuations. In this document, an optical fiber pH sensor based on the simultaneous generation of two different electromagnetic effects, lossy mode resonance (LMR) and localized surface plasmon resonance (LSPR), is presented.…”