研究目的
Investigating the temperature dependence of the whispering gallery modes (WGMs) of self-assembled microbottle resonators (MBRs) made of poly (methyl methacrylate) (PMMA) doped with fluorescent cadmium selenide quantum dots (QDs).
研究成果
The study demonstrates that QD doped self-assembled microbottle resonators exhibit WGMs that show a linear blue-shift with increase in temperature. The system is highly photo-stable and can be used in fluorescence-based temperature sensor applications.
研究不足
The sensitivity of the temperature sensor is lower compared to liquid crystal microdroplets based temperature sensors. The system's resolution is estimated to be 2°C.
1:Experimental Design and Method Selection:
The study involves the preparation of self-assembled microbottle resonators (MBRs) doped with CdSe QDs and the investigation of their WGMs' temperature dependence. Finite element modelling was used to simulate the WGMs of an MBR.
2:Sample Selection and Data Sources:
CdSe/CdS core shell QDs dispersed in hexane and PMMA were used to prepare the MBRs. The PL measurements were done using a high-resolution micro Raman spectrometer.
3:List of Experimental Equipment and Materials:
Equipment includes a micro Raman spectrometer (Horiba Jobin Yvon, HR800UV), a temperature-controlled sample chamber (LINKAM, THMS 600), a field emission scanning electron microscope (FESEM) (model FEI Inspect F50), and a transmission electron microscope (TEM, Tecnai G20). Materials include CdSe/CdS core shell QDs, PMMA, and toluene.
4:0). Materials include CdSe/CdS core shell QDs, PMMA, and toluene. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The sMBRs were prepared by coating a tapered fiber with PMMA solution containing QDs, allowing the solvent to evaporate, and baking the sample. The PL measurements were conducted at various temperatures.
5:Data Analysis Methods:
The shifts in WGMs were analyzed in relation to temperature changes, and the sensitivity of the device was calculated.
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