Surface-Enhanced Raman Scattering of 4-Aminothiophenol in Assemblies of Nanosized Particles and the Macroscopic Surface of Silver

Zheng, Junwei; Zhou, Yaoguo; Li, Xiaowei; Ji, Yanjun; Lu, and Tianhong; Gu, Ruiting

doi:10.1021/la011706p

Cited by 173 publications

(183 citation statements)

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“…The spectra are dominant with a 1 vibration modes at 1590 and 1078 cm −1 and the vibration mode at 390 cm −1 is assigned to one of the vibrational modes of the C-S bond, most likely the bending mode of the C-S bond. 34,35 And because a 1064 nm laser was used as the excitation source, a lesser extent of contribution of the Herzberg-Teller term is expected and thereby, the enhancement of b 2 modes is also less than that with the excitation in the visible region. 34,35 The EM mechanism is dominant though the CT mechanism cannot be neglected because of the apparent enhancement of b 2 modes at 1140 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…34,35 And because a 1064 nm laser was used as the excitation source, a lesser extent of contribution of the Herzberg-Teller term is expected and thereby, the enhancement of b 2 modes is also less than that with the excitation in the visible region. 34,35 The EM mechanism is dominant though the CT mechanism cannot be neglected because of the apparent enhancement of b 2 modes at 1140 cm −1 . It has reported that metal nanoshells with shell layers consisting of metals with strong plasmon resonances exhibit a strong, plasmon-derived optical resonance, typically shifted to much longer wavelengths than the plasmon resonance of the corresponding solid metal nanosphere.…”

Section: Resultsmentioning

confidence: 99%

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Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors

Wang

Chen

Dong

et al. 2006

The Journal of Chemical Physics

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Surface-enhanced Raman scattering (SERS) activity of silver-gold bimetallic nanostructures (a mean diameter of ∼100nm) with hollow interiors was checked using p-aminothiophenol (p-ATP) as a probe molecule at both visible light (514.5nm) and near-infrared (1064nm) excitation. Evident Raman peaks of p-ATP were clearly observed, indicating the enhancement Raman scattering activity of the hollow nanostructure to p-ATP. The enhancement factors (EF) at the hollow nanostructures were obtained to be as large as (0.8±0.3)×106 and (2.7±0.5)×108 for 7a and 19b (b2) vibration mode, respectively, which was 30–40 times larger than that at silver nanoparticles with solid interiors at 514.5nm excitation. EF values were also obtained at 1064nm excitation for 7a and b2-type vibration mode, which were estimated to be as large as (1.0±0.3)×106 and (0.9±0.2)×107, respectively. The additional EF values by a factor of ∼10 for b2-type band were assumed to be due to the chemical effect. Large electromagnetic EF values were presumed to derive from a strong localized plasmas electromagnetic field existed at the hollow nanostructures. SERS activity of hollow nanostructures with another size (a mean diameter of ∼80nm) was also investigated and large EF for 7a and b2-type band are obtained to be (0.6±0.3)×106 and (1.7±0.7)×108, respectively, at 514.5nm excitation and (0.2±0.1)×106 and (0.6±0.2)×107, respectively, at 1064nm excitation. Although the optical properties of the hollow nanostructures have not yet been well studied, high SERS activities of the nanostructures with hollow interiors have been exhibited in our report.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors

Wang

Chen

Dong

et al. 2006

The Journal of Chemical Physics

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“…The top electrode could be metal nanoclusters prepared by vacuum vapor deposition [1][2][3][4][5][6][7][8][9][10] or from a suspension of metal nanoparticles. [11][12][13][14] Previous studies have shown that vapor-deposited Au or Ag penetrates into the SAM and inserts into the thiol-Au bond at the Au/ SAM interface when it is vacuum-deposited on an alkanethiol SAM with a methyl end group. 2,3,[5][6][7] In contrast, when they are deposited on an alkanedithiol SAM with a thiol end group pointing up, metal nanoparticles are formed on top of the SAM.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Metal Deposition on Top of an Organic Monolayer

Uosaki

2006

J. Phys. Chem. B

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Electrochemical deposition of metals (platinum or gold) only on top of an organothiolate, 1,4-benzenedimethanethiol (BDMT) or hexanedithiol (HDT), self-assembled monolayer (SAM) on a Au(111) substrate was achieved by electrochemical reduction of PtCl 4 2-or AuCl 4 -ion, which was preadsorbed on one free thiol end group of the dithiol SAM formed on a Au surface, in a metal-ion-free sulfuric acid solution at potentials more negative than the reduction potential of the metal ion. Angle-resolved X-ray photoelectron spectroscopy (AR-XPS) measurement after the reduction of preadsorbed PtCl 4 2-ion on BDMT/Au(111) electrode showed the presence of Pt not underneath but on top of the BDMT SAM. After a negative potential scan of the Pt/BDMT/Au(111) electrode to -1.30 V in 0.1 M KOH solution, a typical cyclic voltammogram of a clean Au(111) electrode was obtained, showing that the BDMT SAM with a Pt layer was reductively desorbed. These results proved that a Pt-BDMT SAM-Au substrate sandwich structure without a short circuit between the two metals was successfully constructed by this technique. Furthermore, a decanethiol (DT) monolayer was constructed on a Au layer, which was formed by the reduction of preadsorbed AuCl 4 -ion on HDT/Au(111) electrode. The formation of DT/Au/HDT/Au(111) structure was confirmed as two cathodic peaks corresponding to reductive desorption of DT from Au on top of the HDT/Au(111) at -0.97 V and that of Au/ HDT from Au(111) at -1.12 V were observed when potential was scanned negatively to -1.35 V.

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“…Without selective detector, the Raman spectra only selected the lipid-and nucleotide-condensed regions from the others, which might lead to the misinterpretation if the healthy cells also have condensed organic organism; such as in the skin hole-close region shown in our experiment. Besides, no specific peaks would be applicable for a selective discrimination of BCC tissue from healthy tissue, which lead to long acquisition time for intraoperative diagnostic (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) h/mm 2 ) [7]. From all the results described above, only regions marked by A2, B2, C2 and D2 can be surely considered as the cancer areas, while A1, B1, C1 and D1 regions may assigned as the position of a hair-hole where the cell concentration also higher than others parts.…”

Section: Gold Nanoparticles Surface Modificationmentioning

confidence: 99%

“…Since the discovery of this surface-enhanced Raman (SER) scattering in 1974 [9], SER scattering has been recognized as a powerful technique for biomedical applications. The application of SER scattering has been studied in cancer detection [10][11][12], widely in molecular structure analysis [13][14][15][16]. For non-labeling agent probes, the Raman spectra were analyzed by measuring the intrinsic signals to distinguish between healthy and diseased regions [10,11].…”

Section: Introductionmentioning

confidence: 99%

Surface-Enhanced Raman Spectroscopy Study of 4-ATP on Gold Nanoparticles for Basal Cell Carcinoma Fingerprint Detection

Quynh

Nam

Kong

et al. 2016

Journal of Elec Materi

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk AbstractThe surface-enhanced Raman (SER) signal of 4-aminothiolphenol (4-ATP) based on the surface of gold nanoparticles colloids with size distributed from 2 to 5 nm were used as labeling agent to detect basal cell carcinoma (BCC) of skin. The enhanced Raman band at 1075 cm -1 corresponding to C-S stretching vibration in 4-ATP was observed during attachement to the surface of gold nanoparticles. The frequency and intensity of this band did not change when the colloids were conjugated with BerEP4 antibody which specifically binds to BCC. We show the feasibility of imaging BCC by SERS scanning the 1075 cm -1 band to detect the distribution of 4-ATP-attached gold nanoparticles attached to skin tissue ex-vivo.

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Surface-Enhanced Raman Scattering of 4-Aminothiophenol in Assemblies of Nanosized Particles and the Macroscopic Surface of Silver

Cited by 173 publications

References 47 publications

Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors

Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors

Electrochemical Metal Deposition on Top of an Organic Monolayer

Surface-Enhanced Raman Spectroscopy Study of 4-ATP on Gold Nanoparticles for Basal Cell Carcinoma Fingerprint Detection

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