Juan Pablo Lopéz Neira - Academia.edu (original) (raw)
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Papers by Juan Pablo Lopéz Neira
physica status solidi (c), 2009
The surface enhanced raman scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed o... more The surface enhanced raman scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed on gold nanoparticles (Au-tyr) is compared with the SERS signal assisted by the presence of gadolinium ions (Gd 3+) coordinated with the Au-tyr system. An enhancement factor of the SERS signal in the presence of Gd 3+ ions was ∼5 times higher than that produced by L-tyrosine adsorbed on gold nanoparticles. The enhancement of the SERS signal can be attributed to a corresponding increase in the local electric field due to the presence of Gd 3+ ions in the vicinity of a gold dimer configuration. This scenario was confirmed by solving numerically Maxwell equations, showing an increase of 1 order of magnitude in the local electric scattered field when the Gd 3+ ion is located in between a gold dimer compared with naked gold nanoparticles.
The journal of physical chemistry. A, Jan 10, 2015
The Surface Enhanced Raman Scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed o... more The Surface Enhanced Raman Scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed on gold nanoparticles (Au-tyr) is compared with the SERS signal assisted by the presence of Gadolinium ions (Gd3+) coordinated with the Au-tyr system. An enhancement factor of SERS signal in the presence of Gd3+ ions was ~5 times higher than that produced by L tyrosine adsorbed on gold nanoparticles. The enhancement of the SERS signal can be attributed to a corresponding increase in the local electric field due to the presence of Gd3+ ions in the vicinity of a gold dimer configuration. This scenario was confirmed by solving numerically Maxwell equations, showing an increase of one order of magnitude in the local electric scattered field when the Gd3+ ion is located in between a gold dimer compared with naked gold nanoparticles.
physica status solidi (c), 2009
The surface enhanced raman scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed o... more The surface enhanced raman scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed on gold nanoparticles (Au-tyr) is compared with the SERS signal assisted by the presence of gadolinium ions (Gd 3+) coordinated with the Au-tyr system. An enhancement factor of the SERS signal in the presence of Gd 3+ ions was ∼5 times higher than that produced by L-tyrosine adsorbed on gold nanoparticles. The enhancement of the SERS signal can be attributed to a corresponding increase in the local electric field due to the presence of Gd 3+ ions in the vicinity of a gold dimer configuration. This scenario was confirmed by solving numerically Maxwell equations, showing an increase of 1 order of magnitude in the local electric scattered field when the Gd 3+ ion is located in between a gold dimer compared with naked gold nanoparticles.
The journal of physical chemistry. A, Jan 10, 2015
The Surface Enhanced Raman Scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed o... more The Surface Enhanced Raman Scattering (SERS) signal from the L-tyrosine (tyr) molecule adsorbed on gold nanoparticles (Au-tyr) is compared with the SERS signal assisted by the presence of Gadolinium ions (Gd3+) coordinated with the Au-tyr system. An enhancement factor of SERS signal in the presence of Gd3+ ions was ~5 times higher than that produced by L tyrosine adsorbed on gold nanoparticles. The enhancement of the SERS signal can be attributed to a corresponding increase in the local electric field due to the presence of Gd3+ ions in the vicinity of a gold dimer configuration. This scenario was confirmed by solving numerically Maxwell equations, showing an increase of one order of magnitude in the local electric scattered field when the Gd3+ ion is located in between a gold dimer compared with naked gold nanoparticles.