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Chemodynamic therapy (CDT) is based on the endogenous generation of cytotoxic hydroxyl free radicals (·OH) with high specificity and selectivity between cancer and normal cells. However, its efficacy is often limited by the relatively deficient catalytic activity of nanozymes in the tumor microenvironment (TME). Therefore, the combination of CDT with other strategy to realize synergistic therapy is necessary. Herein, a versatile plasmonic Au/Ag nanorods (abbreviated as Au/Ag NRs) via anisotropic Ag overgrowth on Au nanobipyramids was rationally devised to achieve synergistic nanozyme catalytic therapy and near infrared II (NIR-II) light induced photothermal therapy (PTT) with the guidance of computed tomography (CT) imaging. As TME contains high concentrations of H+ and H 2 O 2 , Au/Ag NRs exhibited peroxidase (POD) activity to catalyze H 2 O 2 to produce ·OH, inducing cancer cell death. Meanwhile, Au/Ag NRs showed a preeminent NIR-II photothermal effect. More importantly, the enhanced ·OH generation by in-situ heating up resulting from PTT could conversely inhibit the expression of heat shock proteins (HSPs) to abate their resistance to PTT, realizing self-augmented synergistic effect. The NIR-II photothermally enhanced nanozyme catalytic cancer therapy validly inhibited the cancer proliferation, as demonstrated via both cell and animal assays. Moreover, ideal high-contrast CT imaging was realized, owing to the X-ray attenuation capability of elemental Au. The multifunctional Au/Ag NRs hold potential in oncotherapy with imaging capability, high efficiency and low side effects. [Display omitted] • Core-shell Au/Ag nanorods were synthesized with high photoabsorption in the NIR-Ⅱ window. • Au/Ag NRs exhibited peroxidase activity to realize cancer catalytic therapy. • CT imaging has the advantage of guiding the precise treatment. [ABSTRACT FROM AUTHOR]

Abstract: In this study, high-density transparent tin dioxide (SnO2) nanorod array was prepared on fluorine-doped tin oxide (FTO) glass substrate by thermal evaporation of a mixture of SnCl2·2H2O and anhydrous ZnCl2 powders at 600°C in air atmosphere. The structural properties of the sample were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM). Further investigation revealed that ZnCl2 played an important role in the formation of high transparent SnO2 nanorod array. CdS film was deposited on SnO2 nanorod array by the CBD method to form SnO2/CdS heterostructure film. Photoelectrochemical measurements indicated that the novel SnO2/CdS photoelectrode had a potential application in photovoltaic devices. [Copyright &y& Elsevier]

Abstract: Highly ordered arrays of Cu2ZnSnSe4 nanotubes have been successfully synthesized on fluorine-doped tin oxide glass substrate using ZnO nanorod arrays as sacrificial templates. The structure, morphology and optical properties of the Cu2ZnSnSe4 arrays were characterized by X-ray diffraction, Raman spectrometry, field-emission scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray, and UV–Vis absorption spectroscopy. The diameter and length of the Cu2ZnSnSe4 nanotubes can be adjusted by tuning the diameter and length of the ZnO nanorods. In addition, the effect of the length on the performance of the photoelectrochemical cells was also investigated. [Copyright &y& Elsevier]

Abstract: In this work, 3D SnO2 with a hierarchical structure, which was built by numerous one-dimensional tetragonal prism nanorods, had been firstly synthesized by a facile one-step hydrothermal route at 200°C in the presence of cetyltrimethylammonium bromide (CTAB). The cationic surfactant CTAB played a key role in forming the 3D SnO2 hierarchical structure composed of nanorods. In addition, the novel SnO2 hierarchical structure exhibited good gas-sensing properties. The gas sensor showed good selectivity to ethanol gas. Moreover, a linear dependence of the sensitivity on the ethanol concentration was observed, it suggested that the sensor fabricated by SnO2 hierarchical structures is very suitable to detect ethanol with low concentration. [Copyright &y& Elsevier]