Issue 1, 2013

Study of the optical properties of a thermoresponsive polymer grafted onto porous silicon scaffolds

Abstract

In this report, a polymer-filled porous silicon (pSi) structure is described that is able to detect changes in temperature around a critical value en route to developing a temperature sensor deployed in wounds dressings that signals inflammation or infection of the wound bed. Using surface-initiated atom transfer radical polymerization (SI-ATRP), thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) chains are grafted onto pSi layers with different porosity and pore size and the optical changes (effective optical thickness below and above the lower critical solution temperature (LCST)) are monitored via interferometric reflectance spectroscopy. Six etching conditions and three different surface functionalization conditions are explored in order to optimise the optical response to temperature change. Thermally oxidised pSi samples with the highest investigated porosity (80%) show the largest optical response and will be the target for developing optical sensors of wound temperature.

Graphical abstract: Study of the optical properties of a thermoresponsive polymer grafted onto porous silicon scaffolds

Supplementary files

Article information

Article type
Paper
Submitted
07 Aug 2012
Accepted
03 Oct 2012
First published
05 Oct 2012

New J. Chem., 2013,37, 228-235

Study of the optical properties of a thermoresponsive polymer grafted onto porous silicon scaffolds

S. Pace, R. B. Vasani, F. Cunin and N. H. Voelcker, New J. Chem., 2013, 37, 228 DOI: 10.1039/C2NJ40693D

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