Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics.
This journal is © the Owner Societies 2015
Single-layer graphene-assembled 3D porous carbon composite with PVA
and Fe3O4 nano-fillers: A promising flexible 3-phase composite with
interface-mediated superior dielectric and EMI shielding performance
B.V. Bhaskara Raoa, Prasad Yadavc, Radhamanohar Aepurub, H.S. Pandab, S.B.
Ogalec, S.N. Kale*a
aDepartment
of Applied Physics, Defence Institute of Advanced Technology, Girinagar,
Pune 411025, India.
cNational
Chemical Laboratory, Homi Bhabha Road, Pashan, Pune 411008, India.
bDepartment
of Materials Engineering, Defence Institute of Advanced Technology,
Girinagar, Pune 411025, India.
SUPPORTING INFORMATION (SI)
10-4
10-5
'
10-6
10-7
10-8
10-9
10-10
0
5
10
15
20
Wt % of SLGAPC in PVA
Figure S 1 shows conductivity (') with reference to wt % of SLGAPC in PVA composites at
1.133 KHz.
106
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
I
5
10
'
104
103
102
101
100
101
102
103
104
105
106
107
Frequency (Hz)
105
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
II
104
'
103
102
101
100
107
101
102
103
104
105
Frequency (Hz)
106
107
III
6
10
'
105
104
103
102
101
100
101
102
103
104
105
Frequency (Hz)
106
107
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
Figures S 2 shows Temperature dependence of dielectric permittivity (') as a function of
frequency of I) PVA, II) PVA- Fe3O4 and III) PVA-SLGAPC composites.
I
Tan 
100
10-1
100
101
102
103
104
105
Frequency (Hz)
106
107
II
Tan 
100
10-1
100
101
102
103
104
105
Frequency (Hz)
106
107
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
III
Tan 
101
100
10-1
100
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
101
102
103
104
105
Frequency (Hz)
106
107
Figures S 3 shows Temperature dependence of loss tangent (Tan  as a function of
frequency of I) PVA, II) PVA- Fe3O4 and III) PVA-SLGAPC composites.
0.03
I
M"
0.02
0.01
0.00
100
0.03
101
102
103
104
Frequency (Hz)
105
106
107
II
M"
0.02
0.01
0.00
100
0.020
101
102
103
104
105
Frequency (Hz)
106
107
III
0.015
M"
0.010
0.005
0.000
100
101
102
103
104
Frequency (Hz)
105
106
107
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
-30oC
-20oC
-10oC
0oC
10oC
20oC
30oC
40oC
50oC
60oC
70oC
80oC
90oC
100oC
110oC
120oC
Figures S 4 shows Temperature dependence of electric modulus (M”) as a function of
frequency for I) PVA, II) PVA- Fe3O4 and III) PVA-SLGAPC composites.
15
I
II
III
IV
EaIII = 87.1
ln(fmax)
10
EaII = 97.7
EaI = 95.9
5
EaIV = 88
0
0.0030
0.0035
0.0040
-1
1/T (K )
Figures S 5 shows Arrhenius plot in I) PVA, II) PVA- Fe3O4, III) PVA-SLGAPC and IV) PVASLGAPC- Fe3O4 composites.
20
IV
S.E (dB)
S.E (T)
10
S.E (A)
S.E (R)
0
8.00E+009
1.00E+010
Frequency (Hz)
1.20E+010
30
S.E (dB)
IV
20
10
0
8.00E+009
0.6mm
0.3mm
1.00E+010
Frequency (Hz)
1.20E+010
Figures S 6 a) shows shielding effectiveness (S.E) in terms of individual components i.e.
transmission, reflection and absorption vs frequency of sample IV- PVA-SLGAPC- Fe3O4. b)
shows shielding effectiveness vs frequency for different thickness of sample IV- PVASLGAPC- Fe3O4.