Molecular recognition through intercalation chemistry: Immobilization of organoclays on piezoelectric devices

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00031a003· OSTI ID:5091205

Yan, Y; Bein, T ^[1]

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1. Purdue Univ., West Lafayette, IN (United States)

The authors report on a novel design for chemical sensors, based on the deposition of layered silicate materials ion-exchanged with alkylammonium cations ([open quotes]organoclays[close quotes]) on piezoelectric sensors, and their selectivity toward sorption of various small molecules. A growing interest in selective chemical sensors has prompted efforts to develop thin films with selective sorption capabilities. The authors have recently explored the design and sorption behavior of zeolite molecular sieve films on quartz crystal microbalances. Organoclays are interesting complements to zeolite sorbents because their sorption selectivities can be controlled to a large extent by the choice of layer charge density and structure and chain length of the alkylammonium ions. Different combinations of these factors will produce very different interlayer environments, containing polar mineral surfaces, hydrophobic organic chains, and paraffin-like layers. These materials have been studied as selective sorbents in general, in gas chromatography, and for toxic waste removal. The organoclays can offer preferential sorption of nonpolar and flat molecules. The host chosen in this study was hectorite of approximate composition Na[sub 0.3](Li[sub 0.3]Al[sub 0.01]Mg[sub 2.67])Si[sub 4]O[sub 10](OH)[sub 2] (with some Ca content), supplied by American Colloid Co., with cation exchange capacity of 8 mequiv/10 g, and charge density of ca, 1 monovalent cation/100 [angstrom][sup 2].

• OSTI ID: 5091205
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 5:7; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ADSORPTION ISOTHERMS
ALCOHOLS
ALKANES
ALKYLATED AROMATICS
AROMATICS
CARBON TETRACHLORIDE
CHLORINATED ALIPHATIC HYDROCARBONS
CHLOROFORM
CLAYS
DESIGN
ELECTRICITY
ETHANOL
HALOGENATED ALIPHATIC HYDROCARBONS
HEXANE
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTHERMS
MATERIALS
METHANOL
MONTMORILLONITE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PENTANE
PIEZOELECTRICITY
SORPTIVE PROPERTIES
SURFACE PROPERTIES
WATER