Accession Number : ADA328609

Title :   New Organic Materials Suitable for Use in Chemical Sensor Arrays.

Descriptive Note : Technical rept. 1 Jun-31 Jul 96,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY

Personal Author(s) : Crooks, Richard M. ; Ricco, Antonio J.

PDF Url : ADA328609

Report Date : 31 JUL 1997

Pagination or Media Count : 46

Abstract : In this paper we discuss several different approaches for preparing chemically sensitive interfaces suitable for array-based chemical sensing applications. The characteristics of all these materials are that they are simple to prepare, synthetically versatile, easy to immobilize on transducer surfaces, exhibit chemical class selectivity to a significant extent, provide rapid (and in most cases fully reversible) responses to analytes, and are relatively durable and inexpensive. The first class of surface coatings are organomercaptan self-assembled monolayers (SAMs) terminated in chemically sensitive functional groups. The second class are bilayers prepared by modifying the aforementioned SAMs with either metal ions or calixNarenes. Dendritic polymers confined to surfaces comprise the final class of chemically sensitive interfacial materials. In addition to the synthesis of these materials, we provide ex-situ and in-situ characterization of their structure and chemical properties as well as their interactions with selected analytes using surface-infrared spectroscopy, surface acoustic wave (SAW) device-based gravimetry, and X-ray photoelectron spectroscopy.

Descriptors :   *SYNTHESIS(CHEMISTRY), *ORGANIC MATERIALS, IONS, METALS, POLYMERS, X RAY PHOTOELECTRON SPECTROSCOPY, ARGON LASERS, DENDRITIC STRUCTURE, SURFACE ACOUSTIC WAVES.

Subject Categories : Organic Chemistry
      Chemical, Biological and Radiological Warfare
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE