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Preparation of DNA-silver nanohybrids in multilayer nanoreactors by in situ electrochemical reduction, characterization, and application.
Langmuir. 2007 Jul 03; 23(14):7738-44.L

Abstract

Novel nanocomposite films containing DNA-silver nanohybrids have been successfully fabricated by combined use of the layer-by-layer self-assembly technique and an in situ electrochemical reduction method with the DNA-Ag+ complex as one of the building blocks. UV-vis absorption spectroscopy was employed to monitor the buildup of the multilayer films, which suggested a progressive deposition with almost an equal amount of the DNA-Ag+ complex in each cycle. The following electrochemical reduction of silver resulted in the formation of metal nanoparticles in the film, which was evidenced by the evolution of the intense plasmon absorption band originating from silver. Scanning electron microscopy indicated that the particles formed in the multilayer films possessed good monodispersity and stability, thanks to the surrounding polymers. X-ray photoelectron spectroscopy further confirmed the presence of the main components (such as DNA and metallic silver) of the nanocomposite films. In addition, we show that the size of the metal nanoparticles and the optical property of the film could be readily tuned by manipulating the assembly conditions. Furthermore, the feasibility of the as-prepared nanocomposite films functioning as a surface-enhanced Raman scattering active substrate for sensing purposes was investigated, and the results showed great enhancement of the Raman signal of two probe molecules, Rhodamine 6G and 4-aminothiophenol.

Authors+Show Affiliations

State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17552547

Citation

Shang, Li, et al. "Preparation of DNA-silver Nanohybrids in Multilayer Nanoreactors By in Situ Electrochemical Reduction, Characterization, and Application." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 23, no. 14, 2007, pp. 7738-44.
Shang L, Wang Y, Huang L, et al. Preparation of DNA-silver nanohybrids in multilayer nanoreactors by in situ electrochemical reduction, characterization, and application. Langmuir. 2007;23(14):7738-44.
Shang, L., Wang, Y., Huang, L., & Dong, S. (2007). Preparation of DNA-silver nanohybrids in multilayer nanoreactors by in situ electrochemical reduction, characterization, and application. Langmuir : the ACS Journal of Surfaces and Colloids, 23(14), 7738-44.
Shang L, et al. Preparation of DNA-silver Nanohybrids in Multilayer Nanoreactors By in Situ Electrochemical Reduction, Characterization, and Application. Langmuir. 2007 Jul 3;23(14):7738-44. PubMed PMID: 17552547.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation of DNA-silver nanohybrids in multilayer nanoreactors by in situ electrochemical reduction, characterization, and application. AU - Shang,Li, AU - Wang,Yuling, AU - Huang,Lijian, AU - Dong,Shaojun, Y1 - 2007/06/07/ PY - 2007/6/8/pubmed PY - 2007/9/15/medline PY - 2007/6/8/entrez SP - 7738 EP - 44 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 23 IS - 14 N2 - Novel nanocomposite films containing DNA-silver nanohybrids have been successfully fabricated by combined use of the layer-by-layer self-assembly technique and an in situ electrochemical reduction method with the DNA-Ag+ complex as one of the building blocks. UV-vis absorption spectroscopy was employed to monitor the buildup of the multilayer films, which suggested a progressive deposition with almost an equal amount of the DNA-Ag+ complex in each cycle. The following electrochemical reduction of silver resulted in the formation of metal nanoparticles in the film, which was evidenced by the evolution of the intense plasmon absorption band originating from silver. Scanning electron microscopy indicated that the particles formed in the multilayer films possessed good monodispersity and stability, thanks to the surrounding polymers. X-ray photoelectron spectroscopy further confirmed the presence of the main components (such as DNA and metallic silver) of the nanocomposite films. In addition, we show that the size of the metal nanoparticles and the optical property of the film could be readily tuned by manipulating the assembly conditions. Furthermore, the feasibility of the as-prepared nanocomposite films functioning as a surface-enhanced Raman scattering active substrate for sensing purposes was investigated, and the results showed great enhancement of the Raman signal of two probe molecules, Rhodamine 6G and 4-aminothiophenol. SN - 0743-7463 UR - https://www.unboundmedicine.com/medline/citation/17552547/Preparation_of_DNA_silver_nanohybrids_in_multilayer_nanoreactors_by_in_situ_electrochemical_reduction_characterization_and_application_ L2 - https://doi.org/10.1021/la700700e DB - PRIME DP - Unbound Medicine ER -