We provide evidence that the Tm3+-induced defects in Tm-doped AlxGa1-xN hosts play a major role in the nonradiative transfer of the excitation energy from the 1I6 state to the 1D2 state of Tm3+ ions from which the most efficient photoluminescence PL transition 465 nm occurs. Once the concentration of the Tm3+-induced defects decreases with increasing x, the PL transitions starting from the 1I6 state 298, 357, 395, 530, and 785 ...
Thin films formed from salmon sperm DNA reacted with a cationic surfactant (CTMA-Cl) included up to 25 wt % fluorescent molecule sulforhodamine (SRh). SRh effect on DNA chirality and vice versa was investigated by circular dichroism (CD) spectroscopy. The CD signals at 250-265 nm indicate that DNA chirality was maintained or enhanced. Induced CD (iCD) signal at 580-610 nm indicates that SRh is chiral in DNA/CTMA. iCD signal from both ...
The report contains final reports from four separate projects co-funded by AFOSR/AOARD and Korean MEST. The four projects were (1) Ultra-Sensitive Biological Detection via Nanoparticle-Based Magnetically Amplified Surface Plasmon Resonance (Mag-SPR) Techniques; (2) Electronic, Photonic and Magnetic Properties of Natural and Modified DNA Complexes with Heavy Metals Ions; (3) Hierarchical Carbon Fiber Composites; and (4) Distributed Detection of Attacks/Intrusions and Prevention of Resource-Starvation Attacks in Mobile Ad Hoc Networks.
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