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Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate.
J Colloid Interface Sci. 2008 Jan 01; 317(1):183-90.JC

Abstract

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.

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, PR China.No affiliation info availableNo affiliation info availableNo 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

17931640

Citation

Peng, Chongyang, et al. "Self-assembly of lambda-DNA networks/Ag Nanoparticles: Hybrid Architecture and active-SERS Substrate." Journal of Colloid and Interface Science, vol. 317, no. 1, 2008, pp. 183-90.
Peng C, Song Y, Wei G, et al. Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. J Colloid Interface Sci. 2008;317(1):183-90.
Peng, C., Song, Y., Wei, G., Zhang, W., Li, Z., & Dong, W. F. (2008). Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. Journal of Colloid and Interface Science, 317(1), 183-90.
Peng C, et al. Self-assembly of lambda-DNA networks/Ag Nanoparticles: Hybrid Architecture and active-SERS Substrate. J Colloid Interface Sci. 2008 Jan 1;317(1):183-90. PubMed PMID: 17931640.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Self-assembly of lambda-DNA networks/Ag nanoparticles: hybrid architecture and active-SERS substrate. AU - Peng,Chongyang, AU - Song,Yonghai, AU - Wei,Gang, AU - Zhang,Wanxi, AU - Li,Zhuang, AU - Dong,Wen-Fei, Y1 - 2007/09/14/ PY - 2007/05/26/received PY - 2007/08/31/revised PY - 2007/09/10/accepted PY - 2007/10/13/pubmed PY - 2008/2/19/medline PY - 2007/10/13/entrez SP - 183 EP - 90 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 317 IS - 1 N2 - 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. SN - 0021-9797 UR - https://www.unboundmedicine.com/medline/citation/17931640/Self_assembly_of_lambda_DNA_networks/Ag_nanoparticles:_hybrid_architecture_and_active_SERS_substrate_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(07)01326-4 DB - PRIME DP - Unbound Medicine ER -