Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphene field-effect transistors with gigahertz-frequency power gain on
  flexible substrates   The development of flexible electronics operating at radio-frequencies (RF)
requires materials that combine excellent electronic performance and the
ability to withstand high levels of strain. In this work, we fabricate graphene
field-effect transistors (GFETs) on flexible substrates from graphene grown by
chemical vapor deposition (CVD). Our devices demonstrate unity-current-gain
frequencies, fT, and unity-power-gain frequencies, fmax, up to 10.7 and 3.7
GHz, respectively, with strain limits of 1.75%. These devices represent the
only reported technology to achieve gigahertz-frequency power gain at strain
levels above 0.5%. As such, they demonstrate the potential of CVD graphene to
enable a broad range of flexible electronic technologies which require both
high-flexibility and RF operation.

26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg