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Indian Journal of Physics

, Volume 88, Issue 11, pp 1147–1155 | Cite as

Formation of hemoglobin assisted graphene oxide biocomposite film

  • R. Sarkar
  • B. Tah
  • M. Mahato
  • G. B. TalapatraEmail author
  • P. Pal
Original paper

Abstract

Graphene oxide is a one-atom thick layer of graphite and has evolved as a promising precursor for preparing graphene-based composite materials with wide range of applications. Nowadays studies on the binding of biomolecules and nanoparticles with graphene oxide have become an interesting subject to researchers. In this paper, we report the interaction of graphene oxide with hemoglobin at the air–water interface by Langmuir–Blodgett and spectroscopic techniques. Study of the surface pressure growth kinetics reveals that an increased amount of graphene oxide in water subphase enhances surface activity of hemoglobin. The composite monolayers have been transferred onto glass substrate for characterizations by scanning electron microscopy, atomic force microscopy, Raman spectroscopy, UV–vis absorption and emission spectroscopy and circular dichroism. Studies show the decrement of α-helix with increasing concentration of graphene oxide with no major change in β-sheet, which suggests a modification of secondary structure of hemoglobin due to formation of hemoglobin graphene oxide complex. Hemoglobin changes its conformation in presence of the micro hydrophobic environment of graphene oxide sheet, thus forming the said complex at air–water interface.

Keywords

Graphene oxide Hemoglobin Langmuir–Blodgett technique 

PACS Nos.

68.47.Pe 68.65.Pq 87.85.jj 

Notes

Acknowledgments

We thank the department of Science and Technology (DST), Government of India (Project No-SR/S2/CMP-0079/2010(G)) for partial financial support and to the authority of the IACS for providing central instrumental facilities of FE-SEM, AFM and Micro Raman system. Thanks also go to Prof. A. K. Nandi for providing GO sample and to Dr. Manash Ghosh for helping with the collection of Raman spectra.

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Copyright information

© Indian Association for the Cultivation of Science 2014

Authors and Affiliations

  • R. Sarkar
    • 1
  • B. Tah
    • 2
  • M. Mahato
    • 3
  • G. B. Talapatra
    • 2
    Email author
  • P. Pal
    • 2
  1. 1.Department of PhysicsJogesh Chandra Chaudhuri CollegeKolkataIndia
  2. 2.Department of SpectroscopyIndian Association for the Cultivation of ScienceJadavpur, KolkataIndia
  3. 3.Department of Basic Sciences and Social Sciences, School of TechnologyNorth Eastern Hill UniversityShillongIndia

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