QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: sitangshu on February 15, 2013, 08:37

Title: Volume of a graphene sheet
Post by: sitangshu on February 15, 2013, 08:37

Hi,

      Can you let me know how to calculate the volume of a single layer graphene sheet with 3 um and 2 um as length and breadth?


Thanks is advance!

Title: Re: Volume of a graphene sheet
Post by: Anders Blom on February 15, 2013, 10:01

The volume of a sheet, or any 2D object, is zero.

Title: Re: Volume of a graphene sheet
Post by: sitangshu on February 15, 2013, 10:41

Dear Dr. Blom,

                  I understand. In such case how to find heat capacity (units: J/K) of an SLG sheet knowing that specific heat (Unit: J/Kg-K) is known? (The specific heat of an SLG sheet is about 225 J/Kg-K at 300 K).

Title: Re: Volume of a graphene sheet
Post by: Anders Blom on February 15, 2013, 10:43

Looking at the units alone, I'd say by multiplying with the weight?

Title: Re: Volume of a graphene sheet
Post by: sitangshu on February 15, 2013, 11:25

To get heat capacity (Unit: J/K) one has to multiply the specific heat (Unit: J/Kg/K) by mass of the substance. What could be the mass of a 3 um X 2 um SLG sheet?

Regards.

Title: Re: Volume of a graphene sheet
Post by: Anders Blom on February 15, 2013, 13:45

Quote from: sitangshu on February 15, 2013, 11:25

What could be the mass of a 3 um X 2 um SLG sheet?

http://en.wikipedia.org/wiki/Graphene says "a 1-square-meter sheet [of graphene weighs] only 0.77 milligrams". You can compute it from there.