纳米团簇
化学
寡核苷酸
圆二色性
荧光
DNA
动力学
核苷酸
结晶学
纳米颗粒
吸收(声学)
吸收光谱法
星团(航天器)
纳米技术
有机化学
生物化学
物理
量子力学
计算机科学
材料科学
程序设计语言
基因
声学
作者
Jeffrey T. Petty,Jie Zheng,Nicholas V. Hud,Robert M. Dickson
摘要
The high affinity of Ag+ for DNA bases has enabled creation of short oligonucleotide-encapsulated Ag nanoclusters without formation of large nanoparticles. Time-dependent formation of cluster sizes ranging from Ag1 to Ag4/oligonucleotide were observed with strong, characteristic electronic transitions between 400 and 600 nm. The slow nanocluster formation kinetics enables observation of specific aqueous nanocluster absorptions that evolve over a period of 12 h. Induced circular dichroism bands confirm that the nanoclusters are associated with the chiral ss-DNA template. Fluorescence, absorption, mass, and NMR spectra all indicate that multiple species are present, but that their creation is both nucleotide- and time-dependent.
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