Optical Properties of Ni²⁺-, Co²⁺-, and Mn²⁺-doped ZnS Nanoparticles Synthesized Using Reverse Micelle Method

Abstract

Zn 1−x Y x S (x = 0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) was prepared by reverse micelle method using sodium bis(2ethylhexyl)sulfosuccinate (AOT) as surfactant; Y refers to Ni 2+ , Co 2+ , and Mn 2+ ions. The effects of ion doping on the optical characterization, structure, and morphology of ZnS were investigated using ultraviolet-visible (UV-vis) spectroscopy, photoluminescence (PL) spectrophotometry, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy, and transmission electron microscopy. FT-IR and EDAX results confirmed the incorporation of ion dopants into ZnS crystal structure, and XRD results showed that ZnS:Y nanoparticles crystallized in a zinc blende structure without any impurity. The particle size of all of samples ranged from 2 nm to 4 nm, as calculated by the Debye-Scherrer formula and Brus equation. Ion doping shifted the absorption edge to lower wavelengths, as shown in the obtained UV-vis spectra of samples. Bandgap energy values ranged from 4.1 eV to 4.9 eV. PL characteristics of the doped ZnS were compared, and ZnS:Mn 2+ was found to have the highest PL intensity ratio (33.86%). The increased PL intensity ratio indicated increased homogeneous nanoparticle growth with decreased surface defects.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 140.127.23.2 Downloaded on 2014-12-22 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 140.127.23.2 Downloaded on 2014-12-22 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 140.127.23.2 Downloaded on 2014-12-22 to IP

Cellulose-Acetate-Based Films Modified with Ag2O and ZnS as Nanocomposites for Highly Controlling Biological Behavior for Wound Healing Applications

“…It can be observed that there are two weak bands around 485 and 1380.2 cm −1 that are due to Ag-O [ 42 ]. On the other hand, it can be seen that ZnS shares a peak with CA at 1027.16 cm −1 [ 43 ]. The two weak peaks at 485 and 677.2 are attributed to Zn-S cm −1 [ 43 ].…”

“…On the other hand, it can be seen that ZnS shares a peak with CA at 1027.16 cm −1 [ 43 ]. The two weak peaks at 485 and 677.2 are attributed to Zn-S cm −1 [ 43 ]. The peaks of ZnS and Ag 2 O could be due to their very low concentrations compared to CA film.…”

Ultrasensitive, Real-time and Discriminative Detection of Improvised Explosives by Chemiresistive Thin-film Sensory Array of Mn2+ Tailored Hierarchical ZnS

“…On the other hand, when Mn 2+ is incorporated into ZnS, there are Mn-S bonds appeared in Mn 2+ :ZnS host. Compared with that of Zn-S (2.341 Å), the bond length of Mn-S (2.431 Å) is longer 41 42 , thus, it is easier for the adsorbed oxygen molecules to draw electrons from Mn 2+ :ZnS NWs ( Fig. 5b ), which is beneficial to increase the charge depletion layer depth and obtain a high response.…”

Investigations on the interconnection between chemical reactions and experimental results of Zn-based quantum dots

“…The standard IR spectrum of Sigma Aldrich was used along with the literature values to analyze absorption peaks. [33][34][35][36][37] Fig. 8(a) represents spectra for uncapped samples ZS0, ZC0, and ZA0.…”