Fig 1.
Schematic illustration of the steps for synthesis of spherical MoS2 nanocrystals.
Fig 2.
(a) UV–vis spectra of the as-prepared MoS2 nanocrystals and bulk MoS2. (b) XRD spectra (c) Raman spectra (d) Emission PL spectra of the as-prepared MoS2 nanocrystals under different excitation wavelengths (e) Fluorescence lifetime of MoS2 nanocrystals. The data are fitted using a tri-exponential decay model (black line) (f) Table shows PL lifetime (τ1, τ2 and τ3), and amplitude corresponding to different lifetime.
Table 1.
The collected lifetime (τ1, τ2 and τ3) and amplitude of ith lifetime components (Ai).
Fig 3.
(a) HRTEM image of MoS2 nanocrystals (b) shows the size distribution (c) show the lattice fringes (d) Corresponding AFM image of nanocrystals (e) Height profile corresponding the line in d and (e) EDAX spectrum of MoS2 nanocrystals.
Fig 4.
(A) Trypan blue exclusion and (B) MTT assay were used to assess the effects of MoS2 nanocrystals on A549 cells viability.
Fig 5.
Effect of MoS2 nanocrystals on ROS production in A549 cells (a) Control (b) 10 μg/ml and (c) 20 μg/ml.
Fig 6.
Uptake of MoS2 nanoparticles by A549 cells.
Side scatter (SSC) measure of (a) control, (b) 5 μg/ml, (c) 10 μg/ml and (d) 20 μg/ml subjects under flow cytometry. Flow cytometry analysis of the dot plot of mean SSC value distribution of control and different concentration of MoS2 (e) control, (f) 5 μg/ml, (g) 10 μg/ml and (h) 20 μg/ml respectively.
Table 2.
SSC-A mean value of A549 cells after 24 h incubation with MoS2.