Polyelectrolyte and molecular host ion self-assembly to multilayer thin films: An approach to thin film chemical sensors
1997; Elsevier BV; Volume: 45; Issue: 2 Linguagem: Inglês
10.1016/s0925-4005(97)00274-8
ISSN1873-3077
AutoresXiaoguang Yang, S. Johnson, Jingxuan Shi, T. A. Holesinger, B. Swanson,
Tópico(s)Polymer Surface Interaction Studies
ResumoMultilayer molecular films of polyelectrolyte/calixarene and polyelectrolyte/cyclodextrin hosts were fabricated by alternating adsorption of charged species in aqueous solutions onto a substrate (quartz or silicon wafer). This layer-by-layer molecular deposition approach has been successfully used to integrate molecular recognition reagents into polymer films as chemically selective layers for surface acoustic wave (SAW) chemical sensing applications. The resulting sensors have high sensitivity and selectivity to the organic vapors studied. The films were characterized with SEM, infrared and UV-vis spectroscopy, and monitored by SAW devices. These measurements revealed that the deposition process is highly reproducible and the resulting films are uniform and stable.
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