@ARTICLE{Przybysz_N._Mixtures_2020, author={Przybysz, N. and Marć, P. and Tomaszewska, E. and Grobelny, J. and Jaroszewicz, L.R.}, volume={28}, number={4}, journal={Opto-Electronics Review}, pages={220-228}, howpublished={online}, year={2020}, publisher={Polish Academy of Sciences (under the auspices of the Committee on Electronics and Telecommunication) and Association of Polish Electrical Engineers in cooperation with Military University of Technology}, abstract={Thermo-optic properties enhancement of the bi-stable temperature threshold sensors based on a partially filled photonic crystal fiber was reported. Previously tested transducers filled with a selected group of pure n-alkanes had in most cases differences between switching ON and OFF states. Therefore, the modification of filling material by using additional crystallization centers in the form of gold nanoparticles was applied to minimize this undesirable effect. The evaluation of the thermodynamic properties of pentadecane and its mixtures with 14 nm spherical Au nanoparticles based on the differential scanning calorimetry measurements was presented. Optical properties analysis of sensors prepared with these mixtures has shown that they are bounded with refractive index changes of the filling material. Particular sensor switches ON before melting process begins and switches OFF before crystallization starts. Admixing next group of n-alkanes with these nanoparticles allows to design six sensors transducers which change ON and OFF states at the same temperature. Thus, the transducers with a wider temperature range for fiber-optic multi-threshold temperature sensor tests will be used.}, type={Article}, title={Mixtures of selected n-alkanes and Au nanoparticels for optical fiber threshold temperature transducers}, URL={http://czasopisma.pan.pl/Content/119024/PDF-MASTER/OPELRE_28_2020_N_Przybysz.pdf}, doi={10.24425/opelre.2020.136111}, keywords={optical fiber sensors, temperature treshold sensors, gold nanoparticles, n-alkanes, photonic crystal transducers}, }