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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 6, Iss. 7 — Jul. 1, 2008
  • pp: 526–529

Dependence of surface-enhanced Raman scattering from Calf thymus DNA on anions

Jichun Zhu, Yanhui Zhang, Liangping Wu, Zugeng Wang, and Zhenrong Sun  »View Author Affiliations

Chinese Optics Letters, Vol. 6, Issue 7, pp. 526-529 (2008)

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Dependence of surface-enhanced Raman scattering (SERS) from Calf thymus DNA on anions is investigated. With the silver colloid, the bands at 732, 960 and 1333 cm-1 for adenine (A), 1466 cm-1 for deoxyribose, and 1652 cm-1 for the C=O group of thymine (T) are observably enhanced. With the presence of the Cl- or SO^(2-)_(4) anions, the bands at 732 and 1326/1329 cm-1 for the symmetric stretching and skeletal vibrational modes of adenine (A) are dramatically enhanced, and the enhancement effect with the SO^(2-)_(4) ion is more than that with the Cl_ ion. The experimental results show that the DNA molecule can be adsorbed on the silver colloid particles through the C6N and N7 of adenine (A), the C=O of thymine (T) and deoxyribose. Moreover, the formed hydrogen bonding of the Cl_ or SO^(2-)_(4) ions to the C6NH2 group of adenine (A) can induce larger C6N electronegativity, which is favor for the C6N/N7 cooperative adsorption on the (Ag)^(+)_(n) colloid particles.

© 2008 Chinese Optics Letters

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.5660) Medical optics and biotechnology : Raman spectroscopy
(290.5860) Scattering : Scattering, Raman
(300.6450) Spectroscopy : Spectroscopy, Raman

Jichun Zhu, Yanhui Zhang, Liangping Wu, Zugeng Wang, and Zhenrong Sun, "Dependence of surface-enhanced Raman scattering from Calf thymus DNA on anions," Chin. Opt. Lett. 6, 526-529 (2008)

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