Ag K-edge EXAFS analysis of DNA-templated fluorescent silver nanoclusters: Insight into the structural origins of emission tuning by DNA sequence variations

Michael L. Neidig; Jaswinder Sharma; Hsin Chih Yeh; Jennifer S. Martinez; Steven D. Conradson; Andrew P. Shreve

doi:10.1021/ja202797w

Ag K-edge EXAFS analysis of DNA-templated fluorescent silver nanoclusters: Insight into the structural origins of emission tuning by DNA sequence variations

Michael L. Neidig, Jaswinder Sharma, Hsin Chih Yeh, Jennifer S. Martinez, Steven D. Conradson, Andrew P. Shreve

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

DNA-templated silver nanoclusters are promising biological fluorescence probes due to their useful fluorescence properties, including tunability of emission wavelength through DNA template sequence variations. Ag K-edge EXAFS analysis of DNA-templated silver nanoclusters has been used to obtain insight into silver nanocluster bonding, size, and structural correlations to fluorescence. The results indicate the presence of small silver nanoclusters (<30 silver atoms) containing Ag-Ag bonds and Ag-N/O ligations to DNA. The DNA sequence used leads to differences in silver-DNA ligation as well as silver nanocluster size. The results support a model in which cooperative effects of both Ag-DNA ligation and variations in cluster size lead to the tuning of the fluorescence emission of DNA-templated silver nanoclusters.

Original language	English (US)
Pages (from-to)	11837-11839
Number of pages	3
Journal	Journal of the American Chemical Society
Volume	133
Issue number	31
DOIs	https://doi.org/10.1021/ja202797w
State	Published - Aug 10 2011
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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Ag K-edge EXAFS analysis of DNA-templated fluorescent silver nanoclusters: Insight into the structural origins of emission tuning by DNA sequence variations. / Neidig, Michael L.; Sharma, Jaswinder; Yeh, Hsin Chih et al.
In: Journal of the American Chemical Society, Vol. 133, No. 31, 10.08.2011, p. 11837-11839.

Research output: Contribution to journal › Article › peer-review

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abstract = "DNA-templated silver nanoclusters are promising biological fluorescence probes due to their useful fluorescence properties, including tunability of emission wavelength through DNA template sequence variations. Ag K-edge EXAFS analysis of DNA-templated silver nanoclusters has been used to obtain insight into silver nanocluster bonding, size, and structural correlations to fluorescence. The results indicate the presence of small silver nanoclusters (<30 silver atoms) containing Ag-Ag bonds and Ag-N/O ligations to DNA. The DNA sequence used leads to differences in silver-DNA ligation as well as silver nanocluster size. The results support a model in which cooperative effects of both Ag-DNA ligation and variations in cluster size lead to the tuning of the fluorescence emission of DNA-templated silver nanoclusters.",

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AU - Yeh, Hsin Chih

AU - Martinez, Jennifer S.

AU - Conradson, Steven D.

AU - Shreve, Andrew P.

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Ag K-edge EXAFS analysis of DNA-templated fluorescent silver nanoclusters: Insight into the structural origins of emission tuning by DNA sequence variations

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