Biocompatible Responsive Polypyrrole/GO nanocomposite

Coatings for biomedical applications

A. Madhan Kumar a*, Bharathi Suresh b, c, Suresh Ramakrishna b, c,

and Kye-Seong Kim b, c*

a Centre of Research Excellence in Corrosion, Research Institute, King Fahd University of

Petroleum and Minerals, Dhahran, Saudi Arabia

b Graduate School of Biomedical Science and Engineering, Hanyang University, Seoul, Korea.

c College of Medicine, Hanyang University, Seoul, Korea.

*Correspondence authors

A. Madhan Kumar (Email: madhankumar@kfupm.edu.sa ), Tel: +966538801789.

Kye-Seong Kim (Email: ks66kim@hayang.ac.kr), Tel: +82-2-2220-0607, Fax: +82-2-

2220-2422

Electronic Supplementary Material (ESI) for RSC Advances.This journal is © The Royal Society of Chemistry 2015

-0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2-0.004

0.000

0.004

0.008

0.012

0.016

0.020Pure PPy

Cur

rent

, i/A

Potential, E / V vs SCE

-0.6 -0.3 0.0 0.3 0.6 0.9 1.2-0.02

0.00

0.02

0.04

0.06

0.08

Potential, E / V vs SCE

Cur

rent

, i/A

Pure PPy PGO1 PGO2 PGO3

-0.6 -0.3 0.0 0.3 0.6 0.9 1.2-0.02

0.00

0.02

0.04

0.06

0.08

Potential, E / V vs SCE

Cur

rent

, i/A

PGO1

-0.6 -0.3 0.0 0.3 0.6 0.9 1.2

-0.04

0.00

0.04

0.08

0.12

Potential, E / V vs SCE

Curr

ent,

i/A

PGO2

-0.6 -0.3 0.0 0.3 0.6 0.9 1.2-0.04

0.00

0.04

0.08

0.12

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Potential, E / V vs SCE

Cur

rent

, i/A

PGO3

Figure S1 CV curves of pure PPy and PGO nanocomposite coatings on 316L SS substrates

Figure S2 UV-Vis spectral results of GO, pure PPy and PGO nanocomposite coatings

10 20 30 40 50 60 702 Theta (degree)

PGO2

pure PPy

Inten

sity,

(A.U

.)

(001)

GO

(001)

200 300 400 500 600 700 8001

2

3

4

5

6 Pure PPy GO PGO2

Abso

rban

ce (A

.U.)

Wavelength (nm)

Figure S3 XRD pattern of GO, pure PPy and PGO nanocomposite coatings.

Figure S4