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Bimetallic nanostructures as active Raman markers: gold-nanoparticle assembly on 1D and 2D silver nanostructure surfaces.
Small. 2009 Nov; 5(21):2460-6.S

Abstract

It is demonstrated that bimetallic silver-gold anisotropic nanostructures can be easily assembled from various nanoparticle building blocks with well-defined geometries by means of electrostatic interactions. One-dimensional (1D) silver nanowires, two-dimensional (2D) silver nanoplates, and spherical gold nanoparticles are used as representative building blocks for bottom-up assembly. The gold nanoparticles are electrostatically bound onto the 1D silver nanowires and the 2D silver nanoplates to give bimetallic nanostructures. The unique feature of the resulting nanostructures is the particle-to-particle interaction that subjects absorbed analytes to an enhanced electromagnetic field with strong polarization dependence. The Raman activity of the bimetallic nanostructures is compared with that of the individual nanoparticle blocks by using rhodamine 6G solution as the model analyte. The Raman intensity of the best-performing silver-gold nanostructure is comparable with the dense array of silver nanowires and silver nanoplates that were prepared by means of the Langmuir-Blodgett technique. An optimized design of a single-nanostructure substrate for surface-enhanced Raman spectroscopy (SERS), based on a wet-assembly technique proposed here, can serve as a compact and low-cost alternative to fabricated nanoparticle arrays.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Gunawidjaja R
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
Kharlampieva E
No affiliation info available
Choi I
No affiliation info available
Tsukruk VV
No affiliation info available

MeSH

GoldMetal NanoparticlesMicroscopy, Atomic ForceMolecular StructureSilverSpectrophotometry, UltravioletSpectrum Analysis, RamanSurface Properties

Pub Type(s)

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

Language

eng

PubMed ID

19642091

Citation

Gunawidjaja, Ray, et al. "Bimetallic Nanostructures as Active Raman Markers: Gold-nanoparticle Assembly On 1D and 2D Silver Nanostructure Surfaces." Small (Weinheim an Der Bergstrasse, Germany), vol. 5, no. 21, 2009, pp. 2460-6.
Gunawidjaja R, Kharlampieva E, Choi I, et al. Bimetallic nanostructures as active Raman markers: gold-nanoparticle assembly on 1D and 2D silver nanostructure surfaces. Small. 2009;5(21):2460-6.
Gunawidjaja, R., Kharlampieva, E., Choi, I., & Tsukruk, V. V. (2009). Bimetallic nanostructures as active Raman markers: gold-nanoparticle assembly on 1D and 2D silver nanostructure surfaces. Small (Weinheim an Der Bergstrasse, Germany), 5(21), 2460-6. https://doi.org/10.1002/smll.200900688
Gunawidjaja R, et al. Bimetallic Nanostructures as Active Raman Markers: Gold-nanoparticle Assembly On 1D and 2D Silver Nanostructure Surfaces. Small. 2009;5(21):2460-6. PubMed PMID: 19642091.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bimetallic nanostructures as active Raman markers: gold-nanoparticle assembly on 1D and 2D silver nanostructure surfaces. AU - Gunawidjaja,Ray, AU - Kharlampieva,Eugenia, AU - Choi,Ikjun, AU - Tsukruk,Vladimir V, PY - 2009/7/31/entrez PY - 2009/7/31/pubmed PY - 2010/1/22/medline SP - 2460 EP - 6 JF - Small (Weinheim an der Bergstrasse, Germany) JO - Small VL - 5 IS - 21 N2 - It is demonstrated that bimetallic silver-gold anisotropic nanostructures can be easily assembled from various nanoparticle building blocks with well-defined geometries by means of electrostatic interactions. One-dimensional (1D) silver nanowires, two-dimensional (2D) silver nanoplates, and spherical gold nanoparticles are used as representative building blocks for bottom-up assembly. The gold nanoparticles are electrostatically bound onto the 1D silver nanowires and the 2D silver nanoplates to give bimetallic nanostructures. The unique feature of the resulting nanostructures is the particle-to-particle interaction that subjects absorbed analytes to an enhanced electromagnetic field with strong polarization dependence. The Raman activity of the bimetallic nanostructures is compared with that of the individual nanoparticle blocks by using rhodamine 6G solution as the model analyte. The Raman intensity of the best-performing silver-gold nanostructure is comparable with the dense array of silver nanowires and silver nanoplates that were prepared by means of the Langmuir-Blodgett technique. An optimized design of a single-nanostructure substrate for surface-enhanced Raman spectroscopy (SERS), based on a wet-assembly technique proposed here, can serve as a compact and low-cost alternative to fabricated nanoparticle arrays. SN - 1613-6829 UR - https://www.unboundmedicine.com/medline/citation/19642091/Bimetallic_nanostructures_as_active_Raman_markers:_gold_nanoparticle_assembly_on_1D_and_2D_silver_nanostructure_surfaces_ L2 - https://doi.org/10.1002/smll.200900688 DB - PRIME DP - Unbound Medicine ER -