Structural evolution, photoinduced energy transfer in Au nanocluster–CdTe QD nanocomposites and amino acid sensing
作者： Bipattaran Paramanik , Sangita Kundu , Goutam De , Amitava Patra , None
DOI: 10.1039/C5TC02843D
关键词: Materials science 、 Photochemistry 、 Nanocomposite 、 Fourier transform infrared spectroscopy 、 X-ray photoelectron spectroscopy 、 Small-angle X-ray scattering 、 Photoluminescence 、 Analytical chemistry 、 Absorption band 、 Time-resolved spectroscopy 、 Nanoclusters
摘要: Metal–semiconductor heterostructures/composites are found to be a new class of functional materials because their unprecedented properties and potential applications. Various strategies have been adopted design such with unique properties. Here, we synthesized Au–CdTe nanocomposites using Au nanoclusters, the growth rate is controlled by changing Au : Cd ratio. The structural characterization done SAXS (small angle X-ray scattering), TEM (transmission electron microscopy), photoelectron spectroscopy (XPS), FTIR (Fourier transformed infrared), steady state time resolved spectroscopy. blue shifting absorption band CdTe QDs strong photoluminescence quenching in presence suggest metal cluster–semiconductor composite formation. A study confirms Forster resonance energy transfer from proximal nanoclusters non-radiative decay rate. Interestingly, turn on signal i.e. enhancement (PL) intensity nanocomposite observed amino acid limit detection (LOD) for L-cystein 192 nM. These open up platforms optical based probes selective sensing acids.
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