Investigation of photoelectric behaviors of silver sulfide particles in different surroundings

Photocurrent of Ag2S particles decreases in alcohol gases or with CuPc coating and increases in CS2. This interesting phenomenon is explained through a model of gas adsorption.

A Chloride-Doped Silver-Sulfide Cluster [Ag148S26Cl30(C≡CBut)60]6+: Hierarchical Assembly, Enhanced Luminescence and Cytotoxicity to Cancer Cells

The formation of high-nuclear silver(I) clusters remains elusive and their potential applications are still underdeveloped. Herein, we report a unprecedented gigantic Ag148 ([Ag148S26Cl30(C≡CBut)60](SbF6)6) cluster co-templated by Cl- and S2-, which...

Velocity Map Imaging VUV Angle-Resolved Photoelectron Spectroscopy of Isolated Silver Sulfide Nanoparticles

The angle-resolved photoelectron spectroscopy of isolated silver sulfide nanoparticles was carried out by using velocity map imaging technique at the DESIRS beamline of SOLEIL synchrotron facility. The reported spectroscopy results were obtained after interaction of the synchrotron radiation with a polydisperse aerosol produced from aqueous dispersion of silver sulfide particles, approximately 16 nm in diameter. The photoelectron and UV-Vis-NIR absorption spectra were used to estimate the maximum energy of the valance- and the minimum energy of the conduction-band of the nanoparticles. With respect to the vacuum level, the obtained values were found to be 5.5±0.1 eV and 4.5±0.1 eV for the valence band maximum and conduction band minimum, respectively. The dependence of the asymmetry parameter on the electron energy along the silver sulfide valence band showed an onset of inelastic scattering at ~1 eV electron kinetic energy.

A Scientific Analysis of Gold Threads Used in Donggungbi-Wonsam(Ceremonial Robe Worn by a Crown Princess, National Folklore Cultural Heritage No.48)

This study identified material properties through scientific analysis on Jikgeumdan(satin with gold threads) from Donggungbi-Wonsam and the gold threads used in the embroidery. The Donggungbi-Wonsam’s base of gold threads were estimated to have used mulberry fiber’s Korean paper(Hanji) because non-wood-based fibers were observed. The X-ray spectrometer showed that the Tongsuseulan of Donggungbi-Wonsam was a flat gold thread of pure gold and Jikgeumdan of flat silver thread of its Saekdong and Hansam. High sulfur levels were detected in the flat silver thread, which appeared to have formed silver sulfide by either manufacturing process using sulfur or conservation environment. he dragon insignia’s embroidery is also described as two types twisted gold threads; pure gold and alloying-gold and silver. while dragon insignia’s border line is decorated with a twisted gold thread of pure gold. In particular, it was investigated that adhesives such as an animal glue, a protein-based compound by gas chromatography mass spectrometry. Additionally, XRF and Raman spectroscopy analysis on the mixture substances between the metal surface and the base paper of gold threads identified talc and quartz in the gold threads and Seokganju(hematite) in the flat silver threads.