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- W2294429614 abstract "Cadmium sulfide semiconductor clusters in the quantum confined size regime (Q-CdS) may be successfully stabilized by double-stranded deoxyribonucleic acid (DNA) from calf thymus and E. Coli as well as by single-stranded ribonucleic acids (RNA) in the forms of Poly[A], Poly[C], Poly[G] and Poly [U]. These Q-CdS/ploynucleotide clusters exhibit broad trap emission characteristic of both cadmium and sulfur related defect sites at the semiconductor surface. Here the paper discusses differences in the nature of the stabilizer-cluster interaction between single-stranded and double-stranded polynucleotides, as probed by monitoring changes in photoluminescence after thermolysis or ferrocyanide addition. Thermolysis of Q-CdS/polynucleotide samples affects the interfacial interaction between cluster and stabilizer as demonstrated by a shift in the emission maximum and a change in quantum yield. Stern-Volmer analysis of photoluminescence quenching with ferrocyanide anions exhibits nonlinear behavior. Ferrocyanide anions quench the photoluminescene of Q-CdS/DNA approximately 38% more efficiently (in terms of integrated intensity) than Q-CdS/RNA after 0.17 mN addition. Such behavior suggests that single-stranded polynucleotides are better than double-stranded polynucleotides in terms of protecting the semiconductor surface from the highly negatively charged ferrocyanide anion." @default.
- W2294429614 created "2016-06-24" @default.
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- W2294429614 date "1993-12-31" @default.
- W2294429614 modified "2023-09-27" @default.
- W2294429614 title "Effects of thermolysis and ferrocyanide quenching on quantum-confined CdS stabilized by polynucleotides" @default.
- W2294429614 hasPublicationYear "1993" @default.
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