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Metal organochalcogenides (MOCs) are an emerging class of luminescent hybrid organic–inorganic semiconductors, whose structures and properties can be tuned by organic functionalization and substitutions of their metal and chalcogen elements. Herein, we present a new design strategy by heterocyclic modification, resulting in the transformation of prototypical two-dimensional (2D) silver phenylselenide (AgSePh) to a zero-dimensional (0D) silver pyridinylselenide (AgSePy) via the formation of Ag–N bonds. At room temperature, AgSePy shows strong and broad orange photoluminescence (PL; λmax= 636 nm, full-width-at-half-maximum = 111 nm, quantum yield = 64%) with a large 259 nm Stoke’s shift and a 3.4 μs lifetime. Using steady-state and time-resolved PL spectroscopy under varying temperature and oxygen conditions, we found AgSePy to exhibit air-stable luminescence and maintain a high PL quantum yield and a single exponential PL lifetime down to 4 K. Furthermore, AgSePy shows excellent thermal stability up to ∼250 °C and chemical stability against polar, nonpolar, and aqueous solvents at pH 3–14. Density functional theory calculations further confirm the 0D electronic structure. Finally, we successfully demonstrated the performance of AgSePy as an X-ray scintillator with an estimated light yield of ∼8,000 phe/MeV and a spatial resolution down to 0.080 ± 0.005 mm. Overall, this work provides a novel tactic to modify the structures and properties of MOCs, highlighting their structural richness and structure–property relationship, and introduces their new use as X-ray scintillators, encouraging further development in radiation detection and medical imaging.

We report an alloy electrode design for an adaptive liquid lens with a low DC voltage. Due to dielectrophoretic, the focal length of liquid lens can be adapted by applying the electric potential to the electrodes. Herein, the Cr/Cu alloy electrodes in a concentric interdigitate structure with an image aperture of 3 mm were designed and fabricated by a photolithography technique. By using the alloy electrode, the glycerin as the droplet and the commercial silicone oil as the ambient liquid can be applied to form the adaptive liquid lens with a cost-effective. The focal length of designed electrode with the gap of $125~\mu \text{m}$ and width of $125~\mu \text{m}$ can be tunable from 14.5 mm to 11.8 mm under the applied voltage range from 0 – 12 volts.

Hybrid nanomaterials exhibit multi-functionalities, which is synergy or enhanced physical and optical properties over their single components with promising potentials for various applications in dye-sensitized solar cell and photocatalytic materials. In this present research, the Au nanoparticles were prepared at HAuCl4 concentration of 0.5 mM on ZnO nanorod templates and silicon wafer substrate by hydrothermal reaction process. The prepared samples were investigated the crystal structure, chemical composition and morphologies by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS) and field-emission scanning electron microscopy (FESEM), respectively. The XRD results shown that ZnO was preferred orientation along the c-axis (002). The FE-SEM images indicated to the difference of size-Au NPs decorated on ZnO nanorods and silicon wafer. The relationship between the surface area and the size of Au NPs of the prepared samples was investigated and possible growing mechanism of Au NPs on ZnO nanorods templates will be discussed.

Water-soluble fluorescent CdSe/CdZnS quantum dots (QDs) (lem=637nm) were used as a labelling reporter for strip detection. The CdSe/CdZnS QDs was prepared by using core shell technique where CdSe QDs (lem=590nm) core was capped with CdZnS shell. CdZnS-QDs were conjugated with amine-modified DNA probe, that can bio-recognize with DNA product for use in lateral flow assays (LFAs) detection. The presence of functionalized water-dispersible QDs was confirmed by Fourier transform infra-red (FTIR) technique, where a characteristic carboxylic group was observed at 1633 cm[?]1 (-OH) and 3310 cm[?]1 (-COO). DNA probe was immobilized onto QDs by EDC/NHS pathways and confirmed by protein absorption spectra at 260 nm due to heterocyclic ring of nucleosides. QDs-DNA can be applied as labelling reporter to readout fluorescence signal on the LFAs detection.