Related Experiment Video
Updated: May 9, 2025

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Thermally induced correlation effects studied by Raman spectroscopy in PtSe2/Al2O3 systems
Jan Raczyński1, Jakub Nowaczyk1, Ewelina Nowak2
1Institute of Physics, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland. jan.raczynski@.put.poznan.pl.
Abstract:
In this paper, we report the analysis of the Raman spectroscopy results of PtSe2 layers (ranging from 1 to 10 layers) deposited on an Al2O3 substrate, compared to those of the sub-micron thin flake and bulk PtSe2. The positions of typical PtSe2 Raman modes and the integral intensity ratios of the A1g and E1g bands are compared and discussed for all the systems considered in the temperature range from room temperature to 520 K. Moreover, the correlation plot of E1g and A1g is used to analyse the correlations of the dominant Raman modes in the PtSe2/Al2O3 systems, in which the frequency position (in-plane to out-of-plane) ratio exhibits a well-defined linear dependence on temperature.
Related Concept Videos
Raman Spectroscopy: Overview
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Raman Spectroscopy Instrumentation: Overview
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
Atomic Spectroscopy: Effects of Temperature
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
Thermal Sigmatropic Reactions: Overview
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...

