2022
DOI: 10.1021/acs.jpcc.1c10426
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Correlative Raman Imaging and Scanning Electron Microscopy: The Role of Single Ga Islands in Surface-Enhanced Raman Spectroscopy of Graphene

Abstract: Surface-enhanced Raman spectroscopy (SERS) is a perspective nondestructive analytic technique enabling the detection of individual nanoobjects, even single molecules. In this paper, we have studied the morphology of Ga islands deposited on chemical vapor deposition graphene by ultrahigh vacuum evaporation and local optical response of this system by the correlative Raman imaging and scanning electron microscopy (RISE). Contrary to the previous papers, where only an integral Raman response from the whole ununif… Show more

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Cited by 3 publications
(2 citation statements)
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“…Among analytical methods, Raman spectroscopy is unique due to its ability to measure detailed vibrational spectra on samples with essentially no sample preparation considering that it is a light scattering method . It can therefore be used to study molecules in their natural environment and can do so at high spatial resolution when coupled to optical, scanned probe, and electron microscopes. Even single molecule spectra can be detected when the Raman scattering is enhanced by metal nanoparticle antennas. , DFT calculations can help identify the complex fingerprint vibrations of large molecules . Both Raman scattering and DFT have been applied to detect flavonoids and to help characterize the structure and stability of their microcrystalline powders. , Here, we use time dependent density functional theory (TDDFT) to identify Raman active vibrational modes of flavone and quercetin and to investigate the significant influence conformational variations and hydrogen bonding have on their spectra.…”
Section: Introductionmentioning
confidence: 99%
“…Among analytical methods, Raman spectroscopy is unique due to its ability to measure detailed vibrational spectra on samples with essentially no sample preparation considering that it is a light scattering method . It can therefore be used to study molecules in their natural environment and can do so at high spatial resolution when coupled to optical, scanned probe, and electron microscopes. Even single molecule spectra can be detected when the Raman scattering is enhanced by metal nanoparticle antennas. , DFT calculations can help identify the complex fingerprint vibrations of large molecules . Both Raman scattering and DFT have been applied to detect flavonoids and to help characterize the structure and stability of their microcrystalline powders. , Here, we use time dependent density functional theory (TDDFT) to identify Raman active vibrational modes of flavone and quercetin and to investigate the significant influence conformational variations and hydrogen bonding have on their spectra.…”
Section: Introductionmentioning
confidence: 99%
“…Spontaneous Raman spectroscopy or normal Raman spectroscopy includes Raman spectroscopic methods based on Raman scattering with the use of normal farfield optics. There are several variants of normal Raman spectroscopy regarding the excitation-detection geometry, combination with other methods, application of specific (polarization) optics and specific selection of excitation wavelengths to enhance resonance: • Correlative Raman imaging [38] • Resonance Raman spectroscopy (RRS) [39] • Angle-resolved Raman spectroscopy [40]…”
Section: Spontaneous (Or Far-field) Raman Spectroscopymentioning
confidence: 99%