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Photonic porous silicon as a pH sensor.

Authors
  • Pace, Stephanie
  • Vasani, Roshan B
  • Zhao, Wei
  • Perrier, Sébastien
  • Voelcker, Nicolas H
Type
Published Article
Journal
Nanoscale Research Letters
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Jan 01, 2014
Volume
9
Issue
1
Pages
420–420
Identifiers
DOI: 10.1186/1556-276X-9-420
PMID: 25177227
Source
Medline
Keywords
License
Unknown

Abstract

Chronic wounds do not heal within 3 months, and during the lengthy healing process, the wound is invariably exposed to bacteria, which can colonize the wound bed and form biofilms. This alters the wound metabolism and brings about a change of pH. In this work, porous silicon photonic films were coated with the pH-responsive polymer poly(2-diethylaminoethyl acrylate). We demonstrated that the pH-responsive polymer deposited on the surface of the photonic film acts as a barrier to prevent water from penetrating inside the porous matrix at neutral pH. Moreover, the device demonstrated optical pH sensing capability visible by the unaided eye.

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