WSe/BN heterostructure as saturable absorber for a diode-pumped passively Q-switched 2 µm solid-state laser.

We have successfully achieved the synthesis of heterojunction consisting of WSe and BN, by using a liquid phase exfoliation method, and characterization of the prepared materials under the microstructure. The WSe/BN heterojunction was used as a saturable absorber in the Tm:YAP laser for passively Q-switched operation, and a pulsed laser with an output wavelength around 2 µm range was successfully obtained. After comparing the effects of resonators composed of different cavity mirrors, it is concluded that when the curvature radius of the input mirror is 250 mm and the transmittance of the output coupler is 2.

Influence of polyethyleneglycol modification on phagocytic uptake of polymeric nanoparticles mediated by immunoglobulin G and complement activation.

The purpose of this study is to investigate the influence of polyethyleneglycol (PEG) modification on in vitro phagocytic uptake of polymeric nanoparticles (NPs) mediated by immunoglobulin G (IgG) and complement activation. A series of PEG-modified poly (D, L-lactide-co-glycolide) nanoparticles (PEG-PLGA-NPs) were incubated in pure serum protein or whole serum, and their capacity for adsorbing albumin and the serum total proteins was measured by a bicinchoninic acid (BCA) protein assay. The adsorption of serum total IgG and complement activation was investigated by enzyme-linked immunosorbent assay (ELISA).