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Thermochemical Passivation of DNA-Stabilized Q-Cadmium Sulfide Nanoparticles

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Abstract

In this work, the conditions required to transform quantum-confined cadmium sulfide (Q-CdS) nanoparticles stabilized by calf thymus deoxyribonucleic acid from deep trap photoluminescent states to “band edge”-type luminescence are probed. The presence of fivefold excess sulfide relative to cadmium concentration during cluster synthesis, followed by mild heating at 80°C, results in the desired transformation of the Q-CdS emission spectrum. We also indirectly analyze the accompanying structural changes in the polymeric stabilizer, accomplished in this case by use of well-known spectrofluorometric methods with the dyes ethidium bromide and trisphenanthroline ruthenium(II).

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Authors and Affiliations

  1. Department of Chemistry, Texas Christian University, Fort Worth, Texas, 76129

    Shelli R. Bigham & Jeffery L. Coffer

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  1. Shelli R. Bigham
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Bigham, S.R., Coffer, J.L. Thermochemical Passivation of DNA-Stabilized Q-Cadmium Sulfide Nanoparticles. Journal of Cluster Science 11, 359–372 (2000). https://doi.org/10.1023/A:1009049823345

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