Fig. 2
From: Functionalized MoS2-erlotinib produces hyperthermia under NIR
Physicochemical characterization. TEM (a1, a2, a3) images of MoS2, MoS2-SS-HA and MoS2-SS-HA-Er. Images (b1, b2) and the corresponding AFM height profile (c1, c2) of MoS2 and MoS2-SS-HA by atomic force microscopy (AFM) (d1, d2) The size distribution of MoS2 (75 nm) and MoS2-SS-HA (125 nm) nanosheets by dynamic laser light scattering (DLS). e Zeta potential of MoS2, HA-SS, MoS2-SS-HA and MoS2-SS-HA-Er. f UV–vis absorption spectra of MoS2, HA-SS, MoS2-SS-HA and MoS2-SS-HA-Er. g Photographs of MoS2, MoS2-SS-HA and MoS2-SS-HA-Er nanosheets in water, PBS and cell medium for 1 month. The dispersibility of MoS2 nanosheets and the solubility of Er were improved after modified with HA. h FT-IR spectra for MoS2, HA-SS, MoS2-SS-HA and MoS2-SS-HA-Er, and the band at 3431.03 cm−1 correspond to the characteristic vibration of the –C≡H bond due to the coupling vibration of Er