Adsorption characteristics of 4,4′-bipyridine molecules on gold nanosphere films studied by surface-enhanced Raman scattering

Suzuki, Mototsugu; Niidome, Yasuro; Yamada, S.

doi:10.1016/j.tsf.2005.09.114

Cited by 43 publications

(34 citation statements)

References 33 publications

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“…Although it is difficult to assign each peak with confidence, Raman scattering peak assignments can be proposed based on the Raman spectra of the precursor molecule and literature references of relevant compounds. The most prominent peak at 1614 cm −1 is most likely due to a ring stretch from the bipyridine molecule,16a although a significantly less intense peak at a slightly lower wavelength (1607 cm −1 ) was also present in the precursor nitrate 4 , which likely corresponds to a benzene ring stretch 16b. The peak at 1587 cm −1 is also probably due to a benzene ring stretch mode from the precursor molecule 4 16a.…”

Section: Resultsmentioning

confidence: 92%

“…The most prominent peak at 1614 cm −1 is most likely due to a ring stretch from the bipyridine molecule,16a although a significantly less intense peak at a slightly lower wavelength (1607 cm −1 ) was also present in the precursor nitrate 4 , which likely corresponds to a benzene ring stretch 16b. The peak at 1587 cm −1 is also probably due to a benzene ring stretch mode from the precursor molecule 4 16a. The peaks at 1295 cm −1 , 1425 cm −1 , and ∼2914 cm −1 occur in regions that contain well‐known CH vibrations found in hydrocarbon chains 16c,d.…”

Section: Resultsmentioning

confidence: 94%

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Self‐Assembly of a Triangle‐Shaped, Hexaplatinum‐Incorporated, Supramolecular Amphiphile in Solution and at Interfaces

Maran

Britt

Fox

et al. 2009

Chemistry A European J

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The self-assembly and characterization of a novel supramolecular amphiphile built from a new 60°a mphiphilic precursor that incorporates hydrophilic platinum(II) metals and hydrophobic dioctadecyloxy chains is reported. The amphiphilic macrocycle and its precursor compound have been characterized by multinuclear NMR spectroscopy, ESI-MS, and other standard techniques. The coacervate morphology of the amphiphile at the liquid-liquid interface has been studied by using confocal optical microscopy and in situ Raman spectroscopy. The self-assembly of the amphiphilic macrocycle at the air-water interface has been investigated through Langmuir-trough techniques. The study indicates the possible formation of surface micelle-like aggregates. The disparity between the experimental molecular areas and those derived from molecular models support the idea of aggregation. AFM images of the surface aggregates show the formation of a flat topology with arbitrary ridgelike patterns. Reasonable molecular-packing arrangements are proposed to explain the molecular organization within the observed structures.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 94%

Self‐Assembly of a Triangle‐Shaped, Hexaplatinum‐Incorporated, Supramolecular Amphiphile in Solution and at Interfaces

Maran

Britt

Fox

et al. 2009

Chemistry A European J

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“…These Raman shifts correspond approximately to the reported shifts. 25,26) Without nanoparticles, these peaks were not observed at all. This shows that the linearly arranged particles in the nanochannels fabricated using the proposed process enhanced the Raman signal of the molecules.…”

Section: Raman Spectroscopymentioning

confidence: 93%

Surface-enhanced Raman spectroscopy using linearly arranged gold nanoparticles embedded in nanochannels

Sugano¹,

Suekuni²,

Takeshita³

et al. 2015

Jpn. J. Appl. Phys.

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A micro/nanofluidic device containing linearly arranged gold nanoparticles embedded in nanochannels was developed for highly sensitive and highly efficient surface-enhanced Raman spectroscopy (SERS). The Si nanochannel array was fabricated using a photolithography-based process. The nanochannel width was controlled from 100 to 400 nm. Synthesized particles of mean diameter 100 nm were arranged linearly in the nanochannels, using a nanotrench-guided self-assembly process. We developed a process for integrating linearly arranged nanoparticles and micro/nanofluidic components. The particle geometry provided significant Raman enhancement. Furthermore, efficient Raman analysis was possible by scanning a laser spot, because the particles were arranged in one direction. The fabricated structures were evaluated for SERS using 4,4$-bipyridine molecules at concentrations of 1 mM and 10 µM. The Raman peaks was obtained from a few hot spots. The Raman spectra showed that the molecule-specific Raman intensities were correlated with the number of hot spots in the nanochannel.

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“…In Fig. 8, several Raman peaks, which originate from 4,4'-bipyridine, 33) are shown as dotted lines. In both cases in indicates the standard intensity of the adsorbed molecules, which was determined to be comparable to the average of the adsorbed molecules in this study.…”

Section: Raman Spectroscopy: Polarization-dependent Propertymentioning

confidence: 99%

Characterization method for relative Raman enhancement for surface-enhanced Raman spectroscopy using gold nanoparticle dimer array

Sugano

Ikegami

Isono

2017

Jpn. J. Appl. Phys.

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In this paper, a characterization method for Raman enhancement for highly sensitive and quantitative surface-enhanced Raman spectroscopy (SERS) is reported. A particle dimer shows a marked electromagnetic enhancement when the particle connection direction is matched to the polarization direction of incident light. In this study, dimers were arrayed by nanotrench-guided self-assembly for a marked total Raman enhancement. By measuring acetonedicarboxylic acid, the fabricated structures were characterized for SERS depending on the polarization angle against the particle connection direction. This indicates that the fabricated structures cause an effective SERS enhancement, which is dominated by the electromagnetic enhancement. Then, we measured 4,4'-bipyridine, which is a pesticide material, for quantitative analysis. In advance, we evaluated the enhancement of the particle structure by the Raman measurement of acetonedicarboxylic acid. Finally, we compared the Raman intensities of acetonedicarboxylic acid and 4,4'-bipyridine. Their intensities showed good correlation. The advantage of this method for previously evaluating the enhancement of the substrate was demonstrated. This developed SERS characterization method is expected to be applied to various quantitative trace analyses of molecules with high sensitivity.

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Adsorption characteristics of 4,4′-bipyridine molecules on gold nanosphere films studied by surface-enhanced Raman scattering

Cited by 43 publications

References 33 publications

Self‐Assembly of a Triangle‐Shaped, Hexaplatinum‐Incorporated, Supramolecular Amphiphile in Solution and at Interfaces

Self‐Assembly of a Triangle‐Shaped, Hexaplatinum‐Incorporated, Supramolecular Amphiphile in Solution and at Interfaces

Surface-enhanced Raman spectroscopy using linearly arranged gold nanoparticles embedded in nanochannels

Characterization method for relative Raman enhancement for surface-enhanced Raman spectroscopy using gold nanoparticle dimer array

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