Electronic energy transfer from sol-gel matrix and CdSe/ZnS quantum dots to protoporphyrin IX (PpIX) and its application for PpIX detection

Sol-gel matrix GA was produced by hydrolyzing and polymerizing a mixture of GPTMS and APTMS. Sol-gel GA was used to entrap CdSe/ZnS quantum dots (QDs) to fabricate a QD-entrapped sol-gel membrane. The electronic energy transfer from the sol-gel GA membrane and QDs to protoporphyrin IX (PpIX) led to an increase in the energy absorption of PpIX. The QD-entrapped sol-gel membrane was used for quantification of PpIX in aqueous solution with a linear detection range of 1-50 mu M, and the sensitivity increased by about 25-44%, relative to that of the QD probes. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.