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Issue 23, 2012
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Size-selective pH-operated megagates on mesoporous silica materials

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Abstract

pH-responsive megagates have been fabricated around mesoporous silica material SBA-15 in order to mechanize the mesopores. These megagates remain closed in neutral conditions, but open at pH 5. The capping components of the megagates were designed to be capable of controlling pores up to 6.5 nm in diameter. Selectivity of payloads with different sizes can be achieved through the use of different capping components. The operation of the megagates was demonstrated by time-resolved fluorescence spectroscopy which is capable of monitoring the release of both the payload and the cap. This study opens up new possibilities in the field of controllable release.

Graphical abstract: Size-selective pH-operated megagates on mesoporous silica materials

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Publication details

The article was received on 06 Aug 2012, accepted on 08 Oct 2012 and first published on 29 Oct 2012


Article type: Paper
DOI: 10.1039/C2NR32170J
Citation: Nanoscale, 2012,4, 7569-7574
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    Size-selective pH-operated megagates on mesoporous silica materials

    M. Xue, D. Cao, J. F. Stoddart and J. I. Zink, Nanoscale, 2012, 4, 7569
    DOI: 10.1039/C2NR32170J

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