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Surface states at the nanoparticle-polymer matrix interface

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Abstract

The energy barriers for hole injection in polymeric nanocomposites representing a poly(p-xylylene) (PPX) matrix containing dispersed lead or iron nanoparticles were determined by means of photoconductivity spectroscopy. The barriers for hole injection from metal particles in nanocomposites measured in vacuum are 3.6 eV for iron and 3.0 eV for lead; upon oxygen admission, these values decrease to ∼3.2 and ∼2.75 eV, respectively. A shift between the vacuum energy levels of PPX and metal nanoparticles amounts to 1.0 and 0.1 eV for iron and lead, respectively. The greater value for iron suggests the formation of a surface electric dipole, probably as a result of the chemical interaction at the metal nanoparticle-matrix interface.

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Authors and Affiliations

  1. Karpov Institute of Physical Chemistry, State Scientific Center of the Russian Federation, Moscow, 103064, Russia

    E. I. Grigor’ev, S. A. Zav’yalov & S. N. Chvalun

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  1. E. I. Grigor’ev
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  2. S. A. Zav’yalov
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  3. S. N. Chvalun
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 30, No. 8, 2004, pp. 40–45.

Original Russian Text Copyright © 2004 by Grigor’ev, Zav’yalov, Chvalun.

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Grigor’ev, E.I., Zav’yalov, S.A. & Chvalun, S.N. Surface states at the nanoparticle-polymer matrix interface. Tech. Phys. Lett. 30, 322–324 (2004). https://doi.org/10.1134/1.1748613

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  • DOI: https://doi.org/10.1134/1.1748613

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