Surface enhanced Raman scattering study of l-lysine

Aliaga, Álvaro; Osorio-Román, Igor O.; Garrido, C.; Leyton, Patricio; Cárcamo, José; Clavijo, E.; Gómez-Jeria, Juan S.; Campos‐Vallette, Marcelo

doi:10.1016/j.vibspec.2008.09.018

Cited by 50 publications

(42 citation statements)

References 18 publications

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“…The spectral behavior of the COO − group is consistent with a net COO − surface interaction. The above general interpretation is well supported by similar studies in the amino acids Trp, [20] Lys, [21] Cys, [22] His, [31] , as well as in several others [32] including Phe and Tyr. [33] Other bands corresponding to the most abundant amino acids Pro, Gly and Ala are observed in the SERS spectrum at 942, 883 and 528 cm −1 , respectively.…”

Section: Raman and Sers Spectra Of Collagenssupporting

confidence: 64%

“…The band assignment of the tissues, collagens and amino acids is based on our Raman and SERS information and that obtained from the published spectral study of the simplest amino acids such as Try, [20] Lyse [21] , Cys [22] , Pro and Val [23] and complex molecular systems such as collagen, gelatine and elastin [24] . In general amide I, II and III vibrations associated with the protein backbone and carboxylic stretches are expected in the 1220-1660 and 890-960 cm −1 regions.…”

Section: Vibrational Analysis: General Informationmentioning

confidence: 99%

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Raman and surface‐enhanced Raman scattering in the study of human rotator cuff tissues after shock wave treatment

Cárcamo

Aliaga

Clavijo

et al. 2011

J Raman Spectroscopy

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Important improvements of diseases of the rotator cuff supraspinatus tendons are seen after shock wave (SW) treatment. Neo-angiogenesis stimulation and hypercellularization result from short periods of treatment. The present work is an attempt to provide a first approach to these bioprocesses, most likely associated with structural aspects resulting from biochemical changes brought about by the SW. Immunohistochemical data indicate that collagen areas in the tissues are influenced the most by the SW. Presence of additional collagens I and III by the SW treatment is inferred from an observed increase of the tissue’s tinctorial properties. The tools selected for our studies are Ramanspectroscopy and the ultrasensitive surface-enhanced Raman scattering (SERS). Here we extract information from 1016 SERS spectra of 52 biopsies of human tendon tissues on Ag nanoparticles before and after the SW treatment. The spectral information is analyzed on the basis of Raman and SERS data of collagen types I and III and their most abundant amino acid components. SERS spectra of tissues reveal the presence of characteristic modes related mainly to amino acids. It has been found that the main differences between both tissue samples could be correlated with the structural conformational aspects of collagen.This work was financially supported by project FONDECYT 1090074. JJC acknowledges support from Becas Chile 2010 and a doctoral fellowship from CONICYT. AEA acknowledges support from AT-24090050 CONICYT and Becas Chile 2010

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Section: Raman and Sers Spectra Of Collagenssupporting

confidence: 64%

Section: Vibrational Analysis: General Informationmentioning

confidence: 99%

Raman and surface‐enhanced Raman scattering in the study of human rotator cuff tissues after shock wave treatment

Cárcamo

Aliaga

Clavijo

et al. 2011

J Raman Spectroscopy

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“…[20] EHT calculations produce qualitative or semiquantitative descriptions of molecular orbital (MO) and electronic properties. [21] The combination of EHT with molecular mechanics was able to give, for example, a qualitative explanation of our previous SERS works in nanotubes, [17] humic acids, [22] tryptophan [18] and lysine [19] interacting with Ag surfaces. Infrared and Raman spectra were calculated at the 6-31G * level of theory with the Gaussian package.…”

Section: Molecular Models and Calculationsmentioning

confidence: 80%

Adsorption of oligopeptides on silver nanoparticles: surface‐enhanced Raman scattering and theoretical studies

Garrido

Aliaga

Gómez-Jeria

et al. 2010

J Raman Spectroscopy

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The MRKDV peptide structurally associated with an immunomodulatory protein, as well as model peptides ADEDRDA and LGRGISL with common amino acid residues were studied using surface enhanced Raman scattering (SERS) supported by quantum chemical computations. Peptides display different net charges and hydrophobic characteristics, which are related to particular structural aspects of the peptide-metal interaction. Samples were photostable when probed with laser lines at 514, 633 and 785 nm. SERS samples were prepared by coating the solid peptides with metal colloids on a quartz slice. This innovation makes possible to obtain high spectral batch to batch reproducibility. MRKDV SERS spectrum is dominated by signals coming from the guanidinium moiety of the arginine amino acid (R); guanidinium is the intrinsic probe which drives the orientation of the peptide on the metal surface. LGRGISL interacts with the metal surface through the guanidinium group and other amino acid residues; a single structural conformation of the peptide on the surface is proposed. ADEDRDA interacts with the metal surface through various amino acid residues, also including the guanidinium moiety; at least two different structural conformations seem to coexist on the surface. Theoretical calculations performed by using extended Hückel theory and 6-31G * methods for a model of arginine interacting with a silver cluster support the observed experimental result. Similar calculations involving the MRKDV peptide are also reported.

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“…A planar silver surface composed by 800 atoms was built as in our previous works [22][23][24][25] . In the first study, a 4-MPTP molecule was placed on the surface at different distances and orientations.…”

Section: Calculationmentioning

confidence: 99%

Raman and Surface Enhanced Raman Signals of the Sensor 1-(4-Mercaptophenyl)-2,4,6-Triphenylpyridinium Perchlorate

Célis

Campos‐Vallette

Vega

et al. 2015

J. Chil. Chem. Soc.

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The sensor 1-(4-mercaptophenyl)-2,4,6-triphenylpyridinium perchlorate compound was vibrationally characterized using Raman and the Surface-Enhanced Raman techniques, SERS and Shell-Isolated Nanoparticles-Enhanced Raman Spectroscopy (SHINERS). The Raman spectrum was analyzed and the band assignment was supported using DFT data at the B3LYP/6-31G(d) level. SERS data allowed infer about the orientation of the analyte on the naked Ag surface. EHT calculations for an Ag/analyte model represent well the SERS spectrum supporting the Ag-S bond formation. The SHINERS spectrum was obtained by using Ag@SiO 2 nanoparticles prepared at two different time of the SiO 2 coating process. The most intense SHINERS spectral signals of the compound (100 nM) were obtained after 20 minutes of the Ag@SiO 2 formation. No charge-transfer was concluded from the SHINERS experiments.

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Surface enhanced Raman scattering study of l-lysine

Cited by 50 publications

References 18 publications

Raman and surface‐enhanced Raman scattering in the study of human rotator cuff tissues after shock wave treatment

Raman and surface‐enhanced Raman scattering in the study of human rotator cuff tissues after shock wave treatment

Adsorption of oligopeptides on silver nanoparticles: surface‐enhanced Raman scattering and theoretical studies

Raman and Surface Enhanced Raman Signals of the Sensor 1-(4-Mercaptophenyl)-2,4,6-Triphenylpyridinium Perchlorate

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