Chemical class specificity using self-assembled monolayers on SAW devices: Effects of adsorption time and substrate grain size

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The authors report selectivity and sensitivity for 97-MHz SAW (surface acoustic wave) sensors functionalized with (COO{sup {minus}}){sub 2}/Cu{sup 2+}-terminated, organomercaptan-based, self-assembled monolayers (SAMs). Responses were obtained as a function of SAM formation time on thin Au films of controlled grain size. The authors find that the SAM films (1) preferentially adsorb classes of organic analytes according to simple chemical interaction concepts, (2) reversibly adsorb multilayers of some analytes well below their saturation vapor pressure, (3) adsorb more diisopropylmethylphosphonate (DIMP) at a given partial pressure as SAM solution-phase adsorption time increases, and (4) adsorb more DIMP at a given partial pressure ... continued below

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9 p.

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Thomas, R.C.; Ricco, A.J.; DiRubio, C.R.; Yang, H.C. & Crooks, R.M. July 1, 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

The authors report selectivity and sensitivity for 97-MHz SAW (surface acoustic wave) sensors functionalized with (COO{sup {minus}}){sub 2}/Cu{sup 2+}-terminated, organomercaptan-based, self-assembled monolayers (SAMs). Responses were obtained as a function of SAM formation time on thin Au films of controlled grain size. The authors find that the SAM films (1) preferentially adsorb classes of organic analytes according to simple chemical interaction concepts, (2) reversibly adsorb multilayers of some analytes well below their saturation vapor pressure, (3) adsorb more diisopropylmethylphosphonate (DIMP) at a given partial pressure as SAM solution-phase adsorption time increases, and (4) adsorb more DIMP at a given partial pressure as the grain size of the supporting Au film decreases.

Physical Description

9 p.

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OSTI as DE97006867

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  • 192. meeting of the Electrochemical Society and 48. annual meeting of the International Society of Electrochemistry, Paris (France), 31 Aug - 5 Sep 1997

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  • Other: DE97006867
  • Report No.: SAND--97-1466C
  • Report No.: CONF-970805--3
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 505290
  • Archival Resource Key: ark:/67531/metadc697161

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 23, 2016, 2:55 p.m.

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Thomas, R.C.; Ricco, A.J.; DiRubio, C.R.; Yang, H.C. & Crooks, R.M. Chemical class specificity using self-assembled monolayers on SAW devices: Effects of adsorption time and substrate grain size, article, July 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc697161/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.