but disordered, materials

[alexeru653280]

What is the exact meaning of "but disordered, materials."?

They also [13] established how structural disorder affects vibrational energy transport in low-dimensional, but disordered, materials.

I don't undesrtand the meaning of this "but disordered, materials". I know the meaning of each word.

source:

Aerodynamic stability of airfoils in lift-type vertical axis wind turbine in steady solver - ScienceDirect

 

[Barque]

Let me reword:
They also established how structural disorder affects vibrational energy transport in materials that are low-dimensional but disordered.

 

[alexeru653280]

Thanks.