Polysubstitution Induced Centrosymmetric-to-Noncentrosymmetric Structural Transformation and Nonlinear-Optical Behavior: The Case of NaAgGaSe.

Obtaining compounds with large nonlinear-optical (NLO) coefficients and wide band gaps is challenging due to their competitive requirements for chemical bonds. Herein, the first member with mixed cations on the A site in the A-M-Q or A-Ag-M-Q (A = alkali metal; M = Ga, In; Q = S, Se, Te) family, NaAgGaSe (NAGSe), was obtained by a solid-state reaction. Its structure features [GaSe] tetrahedra built three-dimensional {[GaSe]} network, with Na and Na/Ag cations located at the octahedral cavities.

Electronic and optical structural manipulation of NbS defects under strain: first-principles calculations.

Context: Monolayer NbS is a promising new two-dimensional material, and it is critical to develop effective methods to make NbS a material for nanodevices and photovoltaic applications. This study studied the strain rule of sulfur-deficient NbS structure by first principles. The results show that all defect structures introduce impurity states to enhance electron transport.

Photoelectric structure and magnetic changes caused by niobium disulfide adsorbing (non)-metal atoms under defects.

Context: The property transition between metal and semiconductor is the key to improving the properties of transition metal dichalcogenides (TMDCs). The adsorption of the NbS compound in the defect state was adjusted for the first time. The hybrid system overwrites the original surface mechanism of NbS and induces indirect band gaps.

Effect of strain on the electronic and optical properties of (non-)metal adsorbed NbSmonolayer.

This paper investigated the performance changes brought about by the adsorption of metal and non-metal atoms on monolayer NbS. First-principles found that the adsorption of non-metallic atoms on the monolayer NbSsignificantly changed the surface structure, with non-metallic atoms other than F intercalated into the upper S atoms. Among them, the F atom adsorption modification system changed the metallic properties of NbSand tended to transform into a semiconductor.

IRF1-mediated immune cell infiltration is associated with metastasis in colon adenocarcinoma.

Background: Evidence suggests that metastasis is chiefly responsible for the poor prognosis of colon adenocarcinoma (COAD). The tumor microenvironment plays a vital role in regulating this biological process. However, the mechanisms involved remain unclear.

Fabrication of honeycomb-patterned porous films from PS-b-PNIPAM amphiphilic diblock copolymers synthesized via RITP.

Poly(styrene)-b-poly(N-isopropylacrylamide) (PS-b-PNIPAM) amphiphilic diblock copolymers were synthesized via reverse iodine transfer polymerization (RITP) firstly. And then the honeycomb structured porous films were fabricated by drop the amphiphilic diblock copolymer solutions on glass substrates. The porous films were characterized using field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM), respectively.