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Medientyp: E-Artikel Titel: Efficient nanostructure modified interfaces for array‐based sensing based on the novel application of hard/soft acid/base interactions Beteiligte: Gole, James L.; Ozdemir, Serdar Erschienen: Wiley, 2011 Erschienen in: physica status solidi c Sprache: Englisch DOI: 10.1002/pssc.201000050 ISSN: 1862-6351; 1610-1642 Schlagwörter: Condensed Matter Physics Entstehung: Anmerkungen: Beschreibung: <jats:title>Abstract</jats:title><jats:p>With a focus to develop array‐based sensor systems, select micro/nanoporous porous silicon (PS) interfaces have been formed and treated with a variety of nanostructured oxides to create an array of sensor responses for a variety of gases. A general model for the highly active and varied sensitivity of these treated interfaces is presented. This model, which takes advantage of the playoff between chemical bonding and physical adsorption to the deposited nanostructured oxides, suggests a means to selectively enhance the response to basic analyte gases by enhancing the reversible resistance increase characteristic of the response of p‐type silicon. The approach, counter to that used to promote strong interaction and chemical bond formation via hard and soft acid and base interactions (HSAB), promotes the enhancement of physisorption by applying an inverse concept. The focus, in applying the IHSAB model to the interaction of gaseous bases with the acidic nanostructure treated or untreated PS surface, is the minimization of chemical bonding and the maximization of electron transfer to the PS‐based interface, thus increasing the resistance response. The model shows potential to create array‐based devices. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</jats:p>