Dopa-based facile procedure to synthesize AgNP/cellulose nanofiber composite for antibacterial applications

  • Abdul Wahab Jatoi
  • Hiroshi Ogasawara
  • Ick Soo KimEmail author
  • Qing-Qing NiEmail author
Original Article


Herein we present our research on synthesis of silver nanoparticles (AgNPs) on cellulose nanofibers (CN) by a facile procedure using dopamine hydrochloride (Dopa), as reducing agent. The CN were produced by deacetylation of electrospun cellulose acetate (CA) nanofibers. The CN were then treated with 2 mg/mL of Dopa in 1 M Tris HCl buffer (pH 8.5) followed by soaking in 150 mM AgNO3 solution for generation of AgNPs. The samples were characterized with SEM, XRD, FESEM, EDX, XPS, TEM, FTIR analysis and antibacterial assays. Synthesis of AgNPs was confirmed by XRD, XPS and TEM analysis. The TEM images demonstrated CNAgNP samples well decorated with AgNPs. Sizes of the spherical AgNPs, calculated by Debye–Scherrer method, were 20 nm. Antibacterial test results confirmed excellent bacterial growth inhibition properties of CNAgNP on agar plates and in liquid medium against E. coli and S. aureus strains. The relative cell viability (CFU/mL) test results demonstrated excellent bactericidal potential of the CNAgNP samples against the tested strains. The CNAgNP prepared by an environmentally benign process would thus be a promising nano-biocomposite for antibacterial applications.


Cellulose nanofibers AgNPs Dopa Antibacterial activity Green process Electrospinning 


Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  1. 1.Bioscience and Textile Technology DepartmentShinshu UniversityUedaJapan
  2. 2.Department of Textile EngineeringMehran University of Engineering and TechnologyJamshoroPakistan
  3. 3.Division of Gene Research, Department of Life Sciences, Center of Research for Supports Advanced ScienceShinshu UniversityUedaJapan
  4. 4.Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER)Shinshu UniversityUedaJapan
  5. 5.Department of Mechanical Engineering and RoboticsShinshu UniversityUedaJapan

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