Synthesis of nanostructured cadmium and zinc sulfides in aqueous solutions of hyperbranched polyethyleneimine

CdS and ZnS quantum dots embedded in hyaluronic acid films

“…Some organic materials also appeared to be suitable partners for quantum dots stabilizing them, for instance, thioglycerol [21] and dithiolane [22], and providing series of novel composites of interesting optical, that is luminescent, and non-linear electroluminescent properties [23,24]. Sometimes, QDs are synthesized in the presence of organic molecules which prevent them from agglomeration and form a coating of the QDs [25]. Success in the application of QDs in biological studies have frequently been associated with their conjugation with proteins [26][27][28][29][30], peptides [31] and amino acids [32].…”

Preparation of metal sulfide mixtures in montmorillonite by solid–solid reactions

“…5. The different emission bands due to MnS (416, 435 nm), ZnS (413, 440 nm) and CdS (451, 469 nm) were clearly seen at around 413-469 nm for all of the hybrids (Denzler et al, 1998;Hassan and Ali, 2008;Khachatryan et al, 2009). The appearance of the overlapped luminescence bands (at 413,416,435,Fig.…”

Mechanical, optical, and electrical properties of cellulosic semiconductor nanocomposites

“…In a previous work, the prepared semiconductor nanoparticles were characterized using X-ray diffraction, transmission electron microscopy, fluorescence, and UV spectroscopy. 27 The size of the prepared semiconductor nanoparticles was in the range from 7-15 nm, 4-13 nm, 19-24 nm, 23-35 nm, 108-185 nm, an 100-130 nm for CdS, ZnS, CdS/ZnS, ZnS/CdS CdS/ ZnS/CdS, and ZnS/CdS/ZnS, respectively, as seen in the TEM pictures (particle size distribution was not measured). 27 The fibrous structure of bagasse, like all lignocellulosic materials, has porous structure and the size of pores and voids that are much larger than the size of the prepared nanoparticles.…”

“…27 The size of the prepared semiconductor nanoparticles was in the range from 7-15 nm, 4-13 nm, 19-24 nm, 23-35 nm, 108-185 nm, an 100-130 nm for CdS, ZnS, CdS/ZnS, ZnS/CdS CdS/ ZnS/CdS, and ZnS/CdS/ZnS, respectively, as seen in the TEM pictures (particle size distribution was not measured). 27 The fibrous structure of bagasse, like all lignocellulosic materials, has porous structure and the size of pores and voids that are much larger than the size of the prepared nanoparticles. As the nanoparticles in the aqueous solution can strongly bind to the PEI polymer, 30 they could be retained in the fibrous structure during paper sheet making.…”

“…In a previous work 27 CdS, ZnS, CdS/ZnS, ZnS/ CdS (core/shell nanostructures), CdS/ZnS/CdS, ZnS/CdS/ZnS multilayered nanostructures have been prepared at low temperature using cadmium chloride, zinc chloride, and sodium sulfide in the presence of polyethyleneimne hyperbranched (PEI) polymer. The aim of this work is to use the previously prepared PEI-stabilized nanoparticles to prepared functional cellulosic materials that could be used in different optical and electrical applications.…”