• Title/Summary/Keyword: $Ru^{+3}

Search Result 831, Processing Time 0.026 seconds

Deposition characteristics of (Ba,Sr) $RuO_3$ thin films prepared by ultrasonic spraying deposition (초음파 분무 증착법으로 제조한(Ba,Sr) $RuO_3$ 산화물 전극의 증착 특성)

  • 홍석민;임성민;박흥진;김옥경
    • Journal of the Korean Crystal Growth and Crystal Technology
    • /
    • v.11 no.3
    • /
    • pp.111-114
    • /
    • 2001

  • (Ba,Sr) $RuO_3$ thin films were fabricated on Si(100) wafer by metal organic chemical vapor deposition using ultrasonic spraying. When the substrate temperature was varied, the BSR thin films showed good crystallinity above 50$0^{\circ}C$ and showed (110) preferred orientation by X-ray diffraction measurements. The surface morphology, determined by atomic force microscopy, indicated that the grain size of BSR thin films depended strongly on the Ba/Sr ratio. With the increase in the amount of Sr relative to Ba, the resistivity of BSR films decreased fro m415 to 261 $\mu$$\Omega$${\cdot}$cm.

  • PDF

Direction of Intercalation of a bis-Ru(II) Complex to DNA Probed by a Minor Groove Binding Molecule 4',6-Diamidino-2-phenylindole

  • Jang, Yoon Jung;Kim, Raeyeong;Chitrapriya, Nataraj;Han, Sung Wook;Kim, Seog K.;Bae, Inho
    • Bulletin of the Korean Chemical Society
    • /
    • v.34 no.10
    • /
    • pp.2895-2899
    • /
    • 2013

  • Direction of intercalation to DNA of the planar dipyrido[3,2-a:2',3'-c]phenazine ligands (dppz) of a bis-Ru(II) complex namely, $[Ru(1,10-phenanthroline)_2dipyrido[3,2-a:2^{\prime},3^{\prime}-c]phenazine]^{2+}$ linkered by a 1,3-bis(4-pyridyl)propane, was investigated by probing the behavior of 4',6-diamidino-2-phenylindole (DAPI) that bound deep in the minor groove. Bis-intercalation of DPPZ resulted in a little blue shift and hyperchromism in DAPI absorption band, and a large decrease in DAPI fluorescence intensity which accompined by an increase in the dppz emission intensity. Diminishing the intenisty of the positive induced circular dichroism (CD) and linear dichroism (LD) were also observed. These spectral changes indicated that insertion of dppz ligand caused the change of the binding mode of DAPI, which probably moved to the exterior of DNA from the minor groove and interacted with the phospghate groups of DNA by electrostatic interaction. At the surface of DNA, DAPI binds at the phosphate groups of DNA by electrostatic attraction. Consequently, this observation indicated that the dppz ligand intercalated from the minor groove.

  • https://doi.org/10.5012/bkcs.2013.34.10.2895 인용 PDF KSCI