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

87 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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10.1021/ja202797w

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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 - 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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