It was first time using the l‐cysteine self‐assembled on the surface of gold nanoparticles and Bi2O3 nano‐structured materials modified GCE composed l‐cysteine/AuNPs/Bi2O3/GCE sensor. The sensor possessed three‐dimensional nanostructure and exhibited a higher ratio of activity sites, large active surface, fast electron transfer rate, excellent catalytic, sensing characteristics and larger affinity to Cu (II). The sensor was determined to have an excellent sensitivity and selectivity for the detection of Cu (II). The characterization of sensor as well as the optimization of the analytical procedure was reported. The optimized conditions parameters allowed the detection of Cu (II) concentration following short analysis time, a detection limit of 5×10−11 M at 80 s of preconcentration time was obtained using the as‐prepared sensor, and also show excellent stability and good repeatability, and, thus, could be used for detection of Cu (II) in environment.

Constraining by cameras' view-angles of the outdoor monitoring systems, the panoramic digital images fail to be obtained directly from photographing. A method is proposed on the basis of the scale invariance feature transform (i.e. SIFT) algorithm to stitch images captured by the turning video cameras together to form panoramic images. Based on the SIFT features and the retrofitted KD-Tree structure, the BBF searching strategy is employed to match feature points. Then in a post-processing pass, the Ransac algorithm is adopted to remove the mismatching feature points. Photos captured by a surveillance camera are taken as the input to test the proposed method. According to the test, the whole processing time of stitch is reduced while the fidelity of resulting stitched panoramic images is ensured.Keywords-SIFT；image registration；feature detection； feature matching I.

Developing cost-effective and highly efficient photocathodes toward polysulfide redox reduction is highly desirable for advanced quantum dot (QD) photovoltaics. Herein, we demonstrate nitrogen doped carbon (N-C) shell-supported iron single atom catalysts (Fe-SACs) capable of catalyzing polysulfide reduction in QD photovoltaics for the first time. Specifically, Fe-SACs with FeN4 active sites feature a power conversion efficiency of 13.7% for ZnCuInSe-QD photovoltaics (AM1.5G, 100 mW/cm2), which is the highest value for ZnCuInSe QD-based photovoltaics, outperforming those of Cu-SACs and N-C catalysts. Compared with N-C, Fe-SACs exhibit suitable energy level matching with polysulfide redox couples, revealed by the Kelvin probe force microscope, which accelerates the charge transferring at the interfaces of catalyst/polysulfide redox couple. Density functional theory calculations demonstrate that the outstanding catalytic activity of Fe-SACs originates from the preferable adsorption of S4 2– on the FeN4 active sites and the high activation degree of the S–S bonds in S4 2– initiated by the FeN4 active sites.

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The Indium Tin Oxide films have been prepared at different substrate-temperature on glass substrates by reactive evaporation of In-Sn alloy with an oxygen pressure of 1.3 10 -1 Pa and a deposition rate of 10 -2 nm/s. The best ITO films obtained have an electrical resistivity of 4.35 10 -4 •cm , a carrier concentration of 4.02 10 20 cm -3 , and a Hall mobility of 67.5 cm 2 v -1 s -1 . The influence of the substrate-temperature on the structural , optical and electrical properties of the obtained films has been investigated.