Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Adsorption-induced expansion of Graphene Oxide Frameworks: ob-servation by in situ neutron diffraction



Joseph C. Schaeperkoetter, Matthew J. Connolly, Haskell Taub, Helmut Kaiser, Carlos Wexler


We have investigated adsorption-induced deformation in graphene oxide frameworks (GOFs), using neutron diffraction. GOFs use a spacer molecule to create a slit-shaped pore defined by two adjacent parallel graphene-oxide (GO) sheets. They are an ideal candidate for deformation studies due to their narrow (∼1 nm), monodisperse, slit-shaped pores whose width can be meas- ured by diffraction. We have observed in situ a monotonic expansion of the slit width with in- creasing pressure upon adsorption of xenon at a temperature of 293 K, methane at 293 K, and hydrogen at 77 K at pressures up to 120 bar. The expansion of ∼4% observed for xenon at a pressure of 48 bar is the largest deformation observed for supercritical adsorption on a carbona-ceous material. We find that the expansion of the three gases can be mapped onto a common curve in a manner similar to a law of corresponding states, assuming the expansion is proportional to the number of adsorbate molecules, the adsorbate diameter squared, and the square root of the adsorbate's critical temperature. We conclude that the expansion observed is consistent with the spacer molecule interacting with the GO sheets via van der Waals forces rather than covalent bonds.


Schaeperkoetter, J. , Connolly, M. , Taub, H. , Kaiser, H. and Wexler, C. (2019), Adsorption-induced expansion of Graphene Oxide Frameworks: ob-servation by in situ neutron diffraction, ACS Ω, [online], (Accessed May 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 27, 2019, Updated October 12, 2021