A new optical doping method toward molecular electronics

Growth of Nanocrystals in a Single Crystal of Different Materials: A Way of Giving Function to Molecular Crystals

“…To realize such structures, the strategies using chemical reactions turned out to be powerful methods . For example, using photochemical reactions to produce a hybrid material, one can modify the electronic and the magnetic properties of organic conductors, Ag(DR) 2 (Figure ; R = CH 3 , Cl, Br, I), by UV−vis light irradiation. − The chloride derivative Ag(DCl) 2 originally, that is, before irradiation, exhibits metallic properties at T ≥ 70 K . The conduction occurs through the π-band of DCl radical species stacking along the crystallographic c -axis (so-called one-dimensional (1D) metal).…”

Ag L3-Edge X-ray Absorption Near-Edge Structure of 4d10(Ag+) Compounds: Origin of the Edge Peak and Its Chemical Relevance

“…Recently, we measured the Ag L 3 -edge X-ray absorption near-edge structure (XANES) of Ag(DMe-DCNQI) 2 to characterize the Ag valence state . Ag(DMe-DCNQI) 2 is a photosensitive organic conductor and a promising material for organic microdevices. − We found that Ag(DMe-DCNQI) 2 has a small but distinctive peak in the middle of the X-ray absorption edge. Behrens et al assigned the peak in the middle of the edge appearing at Ag 2 O to a 2p → 4d transition in which a d hole is created by the s−d hybridization through the covalent bond of the ligand. − …”

Energy-filtered X-ray photoemission electron microscopy and its applications to surface and organic materials

“…In the border of areas A and B, we found respectively an intermediate species with Ag 3d 5/2 and N 1s energies of 370.1 eV and 400.8 eV [41]. This species can be ascribed to an amorphous insulator phase which contained a Ag(DM) 2 molecular structure, as revealed by XRD and XANES studies [40,42]. Chemical imaging gives important information related to organic-compound-based molecular devices because they show various chemical states, which can be recognized by the binding energy shifts in XPS.…”

“…9 shows the Ag 3d and N 1s l-XP spectra of the Ag(DM) 2 sample with partial UV-vis irradiation for four days at area B [39]. The UV irradiation converted the sample from a conductor to an insulator [40]. In the non-irradiated region, Ag and N peaks were observed at 368.1 eV and 398.4 eV, which correspond well to Ag(DM) 2 .…”