Can graphene quench the light from FITC?

I found that when I try to excite an FITC-tag protein linked to graphene with blue light, it seems graphene quench the light every time. No matter how many times I tried, it still became the darkest one on the screen. In order to find the answers, I've searched the literature and only found these two.

http://link.aip.org/link/JCPSA6/v130/i8/p086101/s1
http://link.aip.org/link/JCPSA6/v129/i5/p054703/s1

I also repeated this experiment with almost identical condition simply by replacing graphene with CNT.
The results is quite different from graphene, it emitted green light normally.
But I think this may be due to some of CNTs are semiconductor which would not quench the light so effectly whereas the metallic one would do.
Maybe graphene behaves just like a metal, since the metal marks in the surrounding area were able to quench all the light as well.
But, what would happen if we put the FITC-tag protein on the top of the GO?
GO should have a band gap due the disruption of the π network, but it seems to depend on some specially distributed oxidized sites to open the "gap". I  believe that one day the GO will be a band gap controllable materials in the future, but now, still long way to go.

UCLA researchers found the way to form GNR by Si-NW etching mask!!

I have to say this is really a brilliant idea to form a GNR by simply applying the nanowire as a mask.

Two groups from UCLA, lead by Yu Huang and Xiangfeng Duan, published this work in Nano Letters

http://pubs.acs.org/doi/abs/10.1021/nl900531n

I think it is very suitable for us to produce GNR in this way, since we have plenty of Si nanowires. In order to test it, I try to disperse Si nanowires by suspending them in an enthanolic solution. I found that it is hard to control the distribution and orientation of nanowires. Even though the nanowire has been deposit on the top of graphene, it is no guarantee that the nanowire would firmly contact the graphene to the extent that is able to protect the underlying graphene, which is hard to verify as well.

I think I would try to use some physical ways to deposit the nanowire if I have time to test it.