Preparation of ZnS nanoparticles by hydrothermal method

Thermal quenching behavior of emission bands in Eu-doped ZnS nanowires

“…above, the surface states play an important role in optical emission and peaks around 400 nm (P1 and P1 0 ) are originated from surface states due to the large surface-to-volume ratio of these nanostructures. Numerous researches reported that the peaks around 480 nm (2.583 eV)-530 nm (2.339 eV) originate from vacancy or interstitials related self-activated centers [28][29][30], incorporation of Au catalyst [6,31] or Eu 2 þ related transitions [15,16]. In our case, P2 (479.0 nm) and P2 0 (506.9 nm) transitions are located energetically within this range.…”

Synthesis, Characterization, and Size Control of Zinc Sulfide Nanoparticles Capped by Poly(ethylene glycol)

“…There is a sudden increase in absorption below 350 nm, with characteristic absorption shoulders found at 288, 300, 298, 293, and 289 nm for the samples S1, S2, S3, S4, and S5 respectively. The absorption peak is used to calculate the band gap of the nanoparticles [14]. The optical band gap was evaluated from the absorption spectrum, and the values are listed in Table 1.…”

Investigation of structural, optical and morphological properties of copper doped zinc sulphide nanoparticles

“…The peaks of the spectra correspond to the fundamental absorption edges in the synthesized samples, and can be used to estimate the band gap of the nanoparticles [28]. Due to quantum size effects, the band gap energy decreases with increasing particle size [29,30].…”