Thermochemical passivation of DNA-stabilized Q-cadmium sulfide nanoparticles
Thermochemical passivation of DNA-stabilized Q-cadmium sulfide nanoparticles
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DOI：
10.1023/a:1009049823345
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发表时间：
2000-06-01
影响因子：
2.8
通讯作者：
Coffer, JL
中科院分区：
文献类型：
--
作者：
Bigham, SR;Coffer, JL
在这项工作中，量子限制硫化镉（Q-CdS）纳米粒子的小牛胸腺脱氧核糖核酸稳定的转换所需的条件，从深陷阱光致发光状态的“带边”型发光进行了探索。在簇合成过程中，相对于镉浓度存在五倍过量的硫化物，然后在80摄氏度下温和加热，导致Q-CdS发射光谱的期望的转变。我们还间接分析了聚合物稳定剂中伴随的结构变化，在这种情况下，通过使用众所周知的荧光分光光度法与染料溴化乙锭和三菲绕啉钌（II）。
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 degrees 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).