These types of anomalies, which can severely affect the properties of these materials can be detected through low-frequency Raman imaging. Our findings provide useful insights for understanding various structure-dependent properties of 2D materials that could be of great importance for the development ...
Raman and resonance Raman investigation of MoS2 nanoparticles. Phys. Rev. B Condens. Matter 60, 2883–2892 (1999). Article CAS Google Scholar McDevitt, N. T., Zabinski, J. S., Donley, M. S. & Bultman, J. E. Disorder-induced low-frequency raman band observed in deposited MoS2 films...
The higher slope of the diffusion impedance in the low-frequency region for SLM-Mo(x)S(x+1) compared to pure 2H-MoS2, confirms facilitated diffusion and accumulation of Na+ charges into the defect-rich 1T-MoS2 nanolayers within the porous surface (Fig. 4e)38. Comparing the SLM-Mo(x)S...
In contrast to the negative Gruneissen parameter occurring in low frequency modes in graphene, positive Gruneissen parameter in the whole Brillouin zone is demonstrated in monolayer MoS2 with much larger Gruneissen parameter for acoustic modes than that for the optical modes, suggesting that monolayer...
where C1 is a proportionality constant, h represents Planck's constant, v is the photon frequency, and n is an exponent that depends on the type of electronic transition in the material. For direct allowed transitions, which are commonly observed in semiconductors, the exponent n equals 0.5. ...
MoS2-based FET biosensors can better control static electricity and reduce low-frequency flicker noise due to interface traps and low surface roughness in its pristine surfaces. PSA is a biomarker for diagnosing prostate cancer, the second most common cancer among men worldwide [1]. The survival ...
1d, f). Second, the peak frequency difference between E12g and A1g shows a clear decreasing trend as a function of layer number (Fig. 1d, f) [21]. The frequency spacing is about 25 cm−1 and 19 cm−1 for bulk and monolayer MoS2, respectively. Third, two peak intensities almost...
Strongly dispersive low frequency Raman modes in germanium. Solid State Commun. 78, 579–582 (1991). 17. Renucci, M. A., Renucci, J. B., Zeyher, R. & Cardona, M. Second-order Raman scattering in germanium in the vicinity of the E1, E1 þ D1 edges. Phys. Rev. B 10, 4309...
12–13). The Nyquist plots of the impedance spectrum consist of two semicircles in the high-frequency region and a straight line in the low-frequency region. The intercept of the semicircle with the Re (Z) axis in the high-frequency region presents the Ohmic resistance (Rs) of the entire...
To avoid the thermal effect on the sample, a pulsed laser with a low frequency and a low power is used in our case, which can efficiently reduce the heat accumulation on the MoS2 film [39], and the low power density incident on the MoS2 also decreases the influence of thermal-induced ...