16736
The interlayer van der Waals ( vdW ) coupling and low - frequency phonon modes and how they evolve with the number of layers are important for both the mechanical and the electrical properties of 2D TMDs .
 Chemical: TMDs
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: TMDs