Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate.

Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Research Abstract Details 

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Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Abstract Text:

Chongyang Peng,Yonghai Song,Gang Wei,Wanxi Zhang,Zhuang Li,Wen-Fei Dong,Chongyang Peng,Yonghai Song,Gang Wei,Wanxi Zhang,Zhuang Li,Wen-Fei Dong,

In this article, highly rough and stable surface enhanced Raman scattering (SERS)-active substrates had been fabricated by a facile layer-by-layer technique. Unique lambda-DNA networks and CTAB capped silver nanoparticles (AgNP) were alternatively self-assembled on the charged mica surface until a desirable number of bilayers were reached. The as-prepared hybrid architectures were characterized by UV-vis spectroscopy, tapping mode atomic force microscopy (AFM) and confocal Raman microscopy, respectively. Linear increases of the maximum absorbance of DNA band with the number of bilayers present a common LBL assembly feature. The red-shift of surface plasmon of silver nanoparticles within the hybrid films was mainly due to the aggregation effect. With the increase of number of bilayers, the surface coverage of nanoparticles on the substrate became larger, as well as the rising of total amount of nanoparticles and the surface roughness of hybrid films. These rough metallic hybrid architectures could be utilized as SERS-active substrates. A significant enhanced Raman scattering effect of the adsorbed analytes, e.g., methylene blue (MB), on these hybrid films was easily exploited by the confocal Raman microscopy. The enhancement factor depended on the surface coverage of nanoparticles and number of bilayers of lambda-DNA/AgNP.

Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Publishing Authors By Initials

C Peng,Y Song,G Wei,W Zhang,Z Li,WF Dong,C Peng,Y Song,G Wei,W Zhang,Z Li,WF Dong,

For similar natural sciences: chemistry: chemistry, physical: surface properties research abstracts see: natural sciences: chemistry: chemistry, physical: surface properties research

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Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of colloid and interface science

VOLUME: 317

Page Numbers: 183-90

Journal Abbreviation:

ISSN: 0021-9797

DAY: 14

MONTH: 09

YEAR: 2007

Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Information

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LANGUAGE: eng

NlmUniqueID: 43125

Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Keywords Mesh Terms:

KEYWORDS: Surface Properties

MESH TERMS: methods

Chemical & Substance for Abstract: Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Information

Substance Name: Silver

Registry Number: 7440-22-4

Grant and Affiliation Information for Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate.

AFFILIATION: 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, PR China.

Country: United States

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MEDLINETA: J Colloid Interface Sci

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