![]() Our predictions match the temperature uncertainties that we extract from repeated measurements, over a wide temperature range (303-473 K), for different CCD readout settings, and for different background levels. After first determining the noise characteristics of our instrumentation, we show how the uncertainty of a temperature measurement can be predicted quantitatively. Here, we demonstrate how the precision of a temperature measurement with luminescent nanocrystals depends not only on the temperature sensitivity of the nanocrystals but also on their luminescence strength compared to measurement noise and background signal. Although the comparison of luminescent materials based on their temperature sensitivity is convenient, this parameter gives an incomplete description of the potential performance of the materials in applications. Researchers have continuously developed new materials aiming for the highest sensitivity of luminescence to temperature. Soc.Materials with temperature-dependent luminescence can be used as local thermometers when incorporated in, for example, a biological environment or chemical reactor. Xie, R.G., Kolb, U., Li, J.X., Basche, T., Mews, A.: Synthesis and characterization of highly luminescent CdSe-core CdS/Zn 0.5Cd 0.5S/ZnS multishell nanocrystals. Weller, H., Bunsenges, B.: Quantum sized semiconductor particles in solution and in modified layers. Suzuki, N., Yasuo, T., Kojima, T.: Holographic recording in TiO 2 nanoparticle-dispersed methacrylate photopolymer films. Sharma, M., Gupta, D., Kaushik, D., Sharma, A.B., Pandey, R.K.: Study of self-organized CdS Q-dots. Schlamp, M.C., Peng, X.G., Alivisatos, A.P.: Improved efficiencies in light emitting diodes made with CdSe(CdS) core/shell type nanocrystals and a semiconducting polymer. Qi, D., Fischbein, M.D., Drndic, M., Selmic, S.: Efficient polymer-nanocrystal quantum-dot photodetectors. Niemeyer, C.M., Ceyhan, B., Hazarika, P.: Oligofunctional DNA–gold nanoparticle conjugates. Niemeyer, C.M.: Nanoparticles, proteins, and nucleic acids: biotechnology meets materials science. Mazhar, J., Shrivastav, A.K., Nandedkar, R.V., Pandey, R.K.: Strained ZnSe nanostructure investigations by X-ray, AFM TEM and optical absorption lumnisance spectra. Liangling, H., Zhao, Y.L., Ryu, K., Zhao, C., Gruner, G.: Light-induced charge transfer in pyrene/CdSe-SWNT hybrids. Klimov, V.I.: Optical nonlinearities and ultrafast carrier dynamics in semiconductor nanocrystals. Huynh, W.U., Dittmer, J.J., Libby, W.C., Whiting, G.L., Alivisatos, A.P.: Controlling the morphology of nanocrystal–polymer composites for solar cells. Henglein, A.: Small-particle research: physicochemical properties of extremely small colloidal metal and semiconductor particles. Greenham, N.C., Peng, X.G., Alivisatos, A.P.: Charge separation and transport in conjugated-polymer/semiconductor-nanocrystal composites studied by photoluminescence quenching and photoconductivity. Science 274, 966–969 (1996)Įmpedocles, S., Bawendi, M.: Spectroscopy of single CdSe nanocrystallites. ![]() Addison Wesley, Boston (1956)ĭickson, R.M.: Three-dimensional imaging of single molecules solvated in pores of poly (acrylamide) gels. (ed.) Structure of Polycrystalline Aggregates, 2nd edn, pp. Science 271, 933–937 (1996)Ĭoe, S., Woo, W.K., Bawendi, M., Bulovic, V.: Electroluminescence from single monolayers of nanocrystals in molecular organic devices. A comparison of estimated particle size from XRD, high resolution AFM and TEM images was resulted in good agreement as 2.1, 2.4 and 2.1 nm respectively for conventional CdSe/ZnS core–shell and as 2.5, 2.5 and 2.2 nm respectively for inverted ZnS/CdSe core–shell nanostructures.Īlivisatos, A.P.: Semiconductor clusters, nanocrystals, and quantum dots. The optical properties were explained using UV–Vis absorption spectroscopy and photo luminescence (PL) spectroscopy in in situ monitoring process. The surface morphology of synthesized thin film was illustrated in the form 2D and 3D images using atomic force microscopy (AFM). The structural properties were studied using X-ray diffraction technique with Rietveld refinement and transmission electron microscopy (TEM). For this purpose both nanostructures were synthesized using chemical bath deposition technique in thin film form. The objective of this work is to investigate structural, morphological and optical properties of conventional CdSe/ZnS core–shell and inverted ZnS/CdSe core–shell nanostructures for opto-electronic device applications. ![]()
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