2018
DOI: 10.1002/smll.201704079
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Unraveling the Raman Enhancement Mechanism on 1T′‐Phase ReS2 Nanosheets

Abstract: 2D transition metal dichalcogenides materials are explored as potential surface-enhanced Raman spectroscopy substrates. Herein, a systematic study of the Raman enhancement mechanism on distorted 1T (1T') rhenium disulfide (ReS ) nanosheets is demonstrated. Combined Raman and photoluminescence studies with the introduction of an Al O dielectric layer unambiguously reveal that Raman enhancement on ReS materials is from a charge transfer process rather than from an energy transfer process, and Raman enhancement i… Show more

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Cited by 102 publications
(95 citation statements)
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“…(Figure 5a) Intensity of peak at 1173 cm −1 was distributed in the scatter diagram in Figure 5b, showing a concentrated fluctuation range. [33] Both of the molecules can be detected with lowest concentration of 10 −9 m, as shown in Figure S8 of the Supporting Information. The average intensity and RSD of each droplet were listed in Table S1 of the Supporting Information, illustrating good reproducibility in each droplet with RSD around 17%.…”
Section: Wwwadvmatinterfacesdementioning
confidence: 93%
“…(Figure 5a) Intensity of peak at 1173 cm −1 was distributed in the scatter diagram in Figure 5b, showing a concentrated fluctuation range. [33] Both of the molecules can be detected with lowest concentration of 10 −9 m, as shown in Figure S8 of the Supporting Information. The average intensity and RSD of each droplet were listed in Table S1 of the Supporting Information, illustrating good reproducibility in each droplet with RSD around 17%.…”
Section: Wwwadvmatinterfacesdementioning
confidence: 93%
“…Similarly, excitation energy could influence the charge transfer process and the chemical potential difference between analyte and substrate. Notably, a monolayer of ReS 2 exhibited enhanced resonance Raman scattering with 532 and 633 nm laser excitation for R6G, rhodamine B (RhB), CV, and methylene blue, respectively (Figure c–f) . The potential of excitation wavelength dependent Raman enhancement for selective chemical sensing opens interesting possibilities for further development.…”
Section: D‐transition Metal Chalcogenides For Sensingmentioning
confidence: 99%
“…The anisotropic layered triclinic ReS 2 has highest charge carrier mobility along the zigzag Re atomic chain direction . The distorted crystal structure (1T phase) exhibits strong electronic and vibrational decoupling, week intralayer polarization, and localized charge density along the ZZ chain direction, which facilitates SERS activity ( Figure a) . The anisotropic charge direction in ReS 2 is quite similar to BP (AC direction) .…”
Section: D‐transition Metal Chalcogenides For Sensingmentioning
confidence: 99%
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