Molecular structure and orientation of chemisorbed aromatic carboxylic acids: Surface enhanced Raman spectrum of benzoic acid adsorbed on silver sol

Pagannone, M.; Fornari, B.; Mattei, Giorgio

doi:10.1016/0584-8539(87)80143-5

Cited by 86 publications

(45 citation statements)

References 22 publications

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“…In agreement with previous reports concerning the Raman spectrum of benzoic acid, the loss of the characteristic CxO stretching vibration at about 1650 cm~1 indicates that the molecular species adsorbed on the metal surface are carboxylate ions (COO~) of benzoate anions. 10,19,20 The SERS spectrum of benzoic acid with the most intense line at 1003 cm~1 shows a one-to-one correspondence with other SERS studies of this acid using silver-coated substrates.8,10,11 In contrast with silver-coated aluminabased substrate, the blank silver-doped solÈgel Ðlm as shown in Fig. 2(B) gives no background emission at 800È1200 cm~1 (Ref.…”

Section: Resultsmentioning

confidence: 77%

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Silver-doped sol-gel films as the substrate for surface-enhanced Raman scattering

Lee

Dai

Young

1997

J. Raman Spectrosc.

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A method was developed to prepare silver-doped sol-gel Ðlms for surface-enhanced Raman scattering (SERS) detection. The technique involves Ðrst doping silver ions as a silver ammine complex into a sol-gel [ Ag(NH 3 ) 2 ' ] matrix, followed by chemical reduction of the doped silver ions into the corresponding silver metal particles. The silver-doped sol-gel Ðlms coated on a glass substrate exhibit strong enhancement (24 000-fold) of Raman scattering from molecules adsorbed on the surface. Very stable SERS spectra of benzoic acid over a period of 48 h were obtained with the new silver substrate.

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Section: Resultsmentioning

confidence: 77%

“…It also attenuates the Rayleigh-scattered radiation by at least four orders of magnitude. A microscope objective (20 ] ; 0.5 N.A.) is used to focus the excitation light on to the sample and to collimate the backscattered Raman signal.…”

Section: Apparatusmentioning

confidence: 99%

Silver-doped sol-gel films as the substrate for surface-enhanced Raman scattering

Lee

Dai

Young

1997

J. Raman Spectrosc.

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“…Benzoic acid is known to be SERS active, [46] and this behavior is supported by the SERS spectrum in Fig. 2(c), which was produced using the commercially obtained 100-150 nm Ag particles.…”

Section: Target Compoundsmentioning

confidence: 72%

Near‐IR surface‐enhanced Raman spectrum of lignin

Agarwal

Reiner

2009

J Raman Spectroscopy

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Compacted powders of commercially available nano-and microparticles of silver were used to successfully induce the surfaceenhanced Raman scattering (SERS) effect in spruce milled-wood lignin (MWL). For the two silver particle sizes used in this investigation, the spectra were mostly similar. Some general characteristics of the lignin SERS spectrum are described. The SERS technique was found to be sensitive for detecting lignin. Significant spectral changes were present between the SERS and normal Raman spectra of MWL. The SERS spectrum was assigned on the basis of literature-reported vibrational assignments of lignin and its models. Based on significant changes in Raman features, we propose that the lignin is strongly adsorbed on silver.To determine whether SERS of lignin can be obtained directly from wood without its isolation, Wiley-milled spruce wood (WMW) adsorbed on silver was studied. The results indicated that not only the surface-enhancement effect was successfully induced in the WMW, but that its spectrum was similar to MWL SERS. Moreover, for WMW, no signals from the carbohydrate components were observed, and therefore, lignin was detected selectively. This nano-and microparticle-based molecularly specific method is expected to make a significant contribution in identifying and investigating lignin in various lignin-containing materials.

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“…Molecular parameters from ab initio MO (HF/6-31G*) calculations are given in Table 2. 156 tries of many of the organic systems have been evaluated (19,21,29,30). An extension of the same argument would suggest that the molecular plane of MBT is perpendicular to the surface in Au but is flat on Ag.…”

Section: Figmentioning

confidence: 99%

A Combined Surface-Enhanced Raman–X-Ray Photoelectron Spectroscopic Study of 2-mercaptobenzothiazole Monolayers on Polycrystalline Au and Ag Films

Sandhyarani

Skanth

Berchmans

et al. 1999

Journal of Colloid and Interface Science

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Molecular structure and orientation of chemisorbed aromatic carboxylic acids: Surface enhanced Raman spectrum of benzoic acid adsorbed on silver sol

Cited by 86 publications

References 22 publications

Silver-doped sol-gel films as the substrate for surface-enhanced Raman scattering

Silver-doped sol-gel films as the substrate for surface-enhanced Raman scattering

Near‐IR surface‐enhanced Raman spectrum of lignin

A Combined Surface-Enhanced Raman–X-Ray Photoelectron Spectroscopic Study of 2-mercaptobenzothiazole Monolayers on Polycrystalline Au and Ag Films

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