Nanostructure reactivity: Confinement energy and charge transfer in porous silicon

G. Di Francia, L. Quercia, I. Rea, P. Maddalena, S. Lettieri

Research output: Contribution to journalArticle

6 Citations (Scopus)


Here, we investigate p-type and n-type porous silicon (PS) reactivity towards oxygen and ammonia in the gas phase. We show that in both the environments, a clear correlation exists between the reaction rate and the confinement energy. In the frame of Marcus theory and starting from basic assumptions, a theoretical model has been developed correlating the charge transfer mechanism to the confinement size. The model well explains the experimental findings, predicting, moreover, the existence of a resonance in the reaction rate, function of the confinement energy. © 2005 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)117 - 124
Number of pages8
JournalSensors and Actuators, B: Chemical
Issue numberSUPPL.
Publication statusPublished - 11 Nov 2005


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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