Table 3 RL values of the obtained nanohybrids at the calculated matching thickness (dm) and the real thickness (d ) in terms of geometrical effect.

From: Heteronanostructured Co@carbon nanotubes-graphene ternary hybrids: synthesis, electromagnetic and excellent microwave absorption properties

Sample

d/mm

RL/dB

fm/GHz

dm/mm

G400

1.5

−18.9

17.8

1.4

2.0

−20.3

14.2

1.7

2.5

−21.0

10.2

2.3

G450

1.5

−20.1

15.4

1.4

2.0

−36.1

11.6

1.9

2.5

−18.6

8.6

2.4

G500

1.5

−18.4

14.0

1.4

2.0

−35.3

11.0

1.8

2.5

−19.3

8.0

2.4

G550

1.5

−13.3

15.4

1.4

2.0

−18.5

11.8

1.8

2.5

−32.1

8.8

2.4

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