Organic-inorganic hybrid perovskite memristors with high resistiveswitching (RS) reliability and low power consumption are crucial for high-density storage and high-efficiency neuromorphic computing. However, the current overshoot in the electroforming process generally induces overgrowth of conductive filaments (CFs) and degrades the RS performance. Here, a simple photo-assisted electroforming (PAE) method to suppress the current overshoot, in which the visible light irradiation is introduced into the initial electroforming process, is proposed for the first time. As a result, a reliable memristor with reduced RS fluctuation and enhanced cycling endurance is obtained, and also, the low operating current of 0.06 mA and low powerconsumption of 0.12 mW are achieved, which are about one order of magnitude lower than those of most reported hybrid perovskite-based memristors. Further experimental evidence indicates that light irradiation plays dual roles: 1) the lightinduced lowering of iodide migration barrier leads to a significant reduction of overshoot current and forming voltage; 2) the enhanced local photoconductivity of the perovskite film shares the overshoot current through the CFs. Both factors limit the total quantity of vacancy defects generated in the electroforming process, thus preventing undesirable overgrowth of the CFs. The present PAE strategy has promise for developing high-performance memristors.

Glutathione S-transferase P1(GSTP1) plays an important role in the detoxification and xenobiotics metabolism. Here, we show that GSTP1 is also involved in LPS (lipopolysaccharide)-induced inflammatory response. GSTP1 expression, determined at the transcription and translation levels, were upregulated by the LPS stimulation in RAW264.7 macrophage-like cells. GSTP1 inhibited LPS-induced mitogen-activated protein kinases MAPKs including ERK, JNK and p38 as well as NF-jB activation dose-and time-dependently in transient transfected and stable transfected cells. Moreover this inhibition of the signaling pathways resulted in the decrease of tumor necrosis factor alpha (TNF-a) and nitric oxide (NO) synthesis. These data suggest that the GSTP1 prevents LPS-induced excessive production of pro-inflammatory factors and plays an anti-inflammatory role in response to LPS.

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Bifunctional mesoporous g-C3N4/Fe3O4 composites were prepared and used for the simultaneous visible-light catalysis and adsorption of arsenic from aqueous solution. The as-prepared composites were characterized by wide-angle X-ray powder diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, a vibrating sample magnetometer, and Brunauer–Emmett–Teller surface analysis. Experimental results showed that meso-g-C3N4/Fe3O4 composites could oxidize As­(III) to As­(V), which was in turn effectively removed by the composites. The photocatalytic activity was significantly enhanced by the synergistic effect between g-C3N4 and Fe3O4. In addition, a reasonable visible-light catalytic oxidation mechanism of As­(III) was investigated.

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