graphene oxide- nuclear armor or absorber?

Question,

Sooo… the question is if you are exposed to radioactive material would this bounce off of you or would you absorb it more?

Summary: Graphene oxide has a remarkable ability to quickly remove radioactive material from contaminated water, researchers in the United States and Russia have found. The discovery could be a boon in the cleanup of contaminated sites like the Fukushima nuclear plants damaged by the 2011 earthquake and tsunami.

[link to www.nature.com (secure)]