Effect of 100 MeV swift heavy ions [silver (Ag{sup 8+})] on morphological and electrical properties of polypyrrole

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3233915· OSTI ID:21361868

Kaur, Amarjeet; Dhillon, Anju ^[1]; Avasthi, D K ^[2]

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1. Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)
2. Inter University Accelerator Center (IUAC), Aruna Asaf Ali Road, New Delhi 110067 (India)

Polypyrrole (PPY) films were prepared by the electrochemical polymerization technique. The fully undoped samples were irradiated with different fluences ranging from 10{sup 10} to 10{sup 12} ions/cm{sup 2} of 100 MeV silver (Ag{sup 8+}) ions. In order to explain the effect of these radiations, a comparative study of samples before and after irradiation was performed by using various techniques such as surface electron microscopy, atomic force microscopy, and X-ray diffraction. With an increase in fluence, the surface structure of PPY films becomes smoother, and the conductivity increases by two orders, which has been explained in light of reordering of polymer chains. The temperature dependence of the dc conductivity of irradiated as well as unirradiated samples has been investigated at 77-300 K. The charge transport properties before and after irradiation are retained although conductivity increases. It has been proposed that swift heavy ion irradiation affects the interchain conductivity. The conductivity of irradiated samples is stable under atmospheric conditions for more than 9 months. The present investigations open up the scope for the applicability of irradiated conducting polymers as microstructures with defined conductivity for sensor applications.

• OSTI ID: 21361868
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 7; Other Information: DOI: 10.1063/1.3233915; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC FORCE MICROSCOPY
CHARGE TRANSPORT
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
ELECTRON MICROSCOPY
FILMS
HEAVY IONS
ION BEAMS
IRRADIATION
MEV RANGE 10-100
MICROSTRUCTURE
POLYMERIZATION
POLYMERS
SENSORS
SILVER
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION
BEAMS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
COHERENT SCATTERING
DIFFRACTION
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY RANGE
IONS
METALS
MEV RANGE
MICROSCOPY
PHYSICAL PROPERTIES
SCATTERING
TRANSITION ELEMENTS