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yea, looks like the author doesn't understand the difference between a semiconductor and a chip.

the researchers said "functioning semiconductor".

Likely single devices patterned from a epitaxially grown graphene layer. It would be a functioning transistor —- or set of transistors, albeit not terribly useful as single devices. Typically they would pattern the devices with large metal landing pads to drop probes onto, and perform characterization from there.

I only scanned the article and the paper, but the paper linked in the article talks about the researchers characterizing performance of a MosFET.

The difference is just engineering once the material science is there.