Controlling the photoconductivity: Graphene oxide and polyaniline self assembled
intercalation.
Sesha Vempati,1, a) Sefika Ozcan,1,3 and Tamer Uyar 1,2 b)
1
UNAM-National Nanotechnology Research Centre, Bilkent University, Ankara, 06800, Turkey.
2
Institute of Materials Science & Nanotechnology, Bilkent University, Ankara, 06800, Turkey.
3
Department of Polymer Science &Technology, Middle East Technical University, Ankara, 06800, Turkey.
a)
svempati01@qub.ac.uk, Phone: (+90) 3122903533
b)
uyar@unam.bilkent.edu.tr, Phone: (+90) 3122903571
Supplementary material
Additional citations
Other graphene intercalating compounds are identified with H [Phys. Rev. Lett. 103, 246804 (2009)], Au [Phys.
Rev. B 81, 235408 (2010), Appl. Phys. Lett. 94, 263115 (2009)], Ge [Phys. Rev. B 84, 25423 (2011)], Alkalai
metal [Science 328, 999 (2010)], CaC6 [Nat. Commun.5 3493 (2014)], C6Yb/C6Ca [Nat. Lett. 1, 39 (2005)],
Eu/Cs [Nano Lett. 13, 5013 (2013)] etc. Interestingly, an extended van Hove singularity [Phys. Rev. Lett. 104,
136803 (2010)], controllable conduction type when intercalated with Eu/Cs [Nano Lett. 13, 5013 (2013)] are
also noticed.
SFIG 1: Luminescence from PG1.5 and PG2.2 samples at an excitation of ~300 nm.
1
SFIG 2: Luminescence data of PANI where LEB gradually transforms into emeralidine base. We chose two
curves from Ref. [J.Y. Shimano and A.G. MacDiarmid, Synth. Met. (2001) Vol 123, pp251-262] where
individual curves are normalized. Leucoemeraldine base (LEB) and its oxidized counterpart (4th curve from the
top in Fig 7 of Ref. Shimano et al.) After normalization both the curves almost retrace each other. This suggests
that the fwhm and spectral location of the peaks are almost undisturbed upon oxidation. However, upon
oxidation the intensity (area under the curve) decreases.
STAB 1: Peak characteristics after deconvolution for three samples. fwhm-full width at half
maximum, §peak parameters are taken from PANI and these initial values are not set as free unlike the
others. fwhm and Peak_center are given in nm while area is given in nm·counts,
GO
PANI
PG2.2
Peak_center
fwhm Area
Peak_center
Fwhm Area
Peak_center
fwhm Area
367
60
6
388
71
62
350
49
26
445
125
43
440
103
36
388§
71§
11
536
126
96
440§
103§
47
615
143
68
406
90
45
497
123
26
616
200
6
654
93
6
Dark
UV-Vis
STAB 2: Slope from log-log plot IV-spectra for the devices under dark and UV-Vis conditions. Voltage range is
shown in parentheses in V. ‘0’ is the minimum of voltage not absolute ‘zero’.
Device
R1
R2
R3
R4
R1
R2
R3
R4
1.03
1.05
1.17
0.76
GO
(0-10)
(0-1)
(1-5)
(5-10)
1.01
0.96
PANI
(0-2)
(0-2)
1.03
1.21
1.38
1.16
1.02
1.13
1.46
PG1.5
(0-1)
(1-2)
(2-6)
(6-10)
(0-1)
(1-4)
(4-10)
4.83
1.88
0.86
2.11
4.13
1.12
0.73
1.49
PG2.2
(0-1)
(1-1.3)
(1.3-2.6)
(2.6-10)
(0-0.5)
(0.5-1)
(1-6)
(6-10)
2
3