Structural and spectral investigations of Rhodamine (Rh6G) dye-silica core–shell nanoparticles
Dwayyan, A.S.Al . 2012
Rhodamine (Rh6G) dye-silica core–shell nanoparticles (DSCSNPs) have been prepared by the controlled hydrolysis and condensation of single silica precursor tetraethylorthosilicate (TEOS) using the sol–gel method. Scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray analysis reveal that dye molecules are entrapped in silica (SiO2) shell resulting into core–shell particles of ∼30 nm diameter. These particles are also characterized by X-ray diffraction and Fourier transforms infrared spectroscopy. The results indicate that core–shell particles are all in spherical shape and have a narrow size distribution. The fluorescent and optical properties of core–shell particles have been investigated using fluorescence and UV–Visible absorption spectra. The photoluminescence in solid or liquid medium occurs at the same wavelength. The SiO2 shell restricts the leakage and photobleaching of dye efficiently. These core–shell nanoparticles are found to be highly luminescent and stable.
In the last two decades, the family of metal halide perovskites has received more attention in radiation detection applications. In this work, the radiation detection and dosimetric applicability…
The high crystal quality of formamidium lead bromide perovskite (CH(NH2)2PbBr3 = FAPbBr3) was infiltrated in a mesoporous TiO2 network.
Tuning the emission spectrum of both binary hybrids of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) (PFO) with each poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly[2-…