Title :
Sensitive detection of organic pollutants in water using self-assembled monolayers of p-tert-butylcalix[4]arenetetrathiol on a quartz crystal microbalance
Author :
Collins, Greg E. ; Gibbs, Charles G. ; Gutsche, C. David
Author_Institution :
Div. of Chem., Naval Res. Lab., Washington, DC, USA
Abstract :
This paper discusses a novel approach to chemical sensing of trace organics in aqueous, liquid media utilizing a self-assembled monolayer of p-tert-butylcalix[4]arenetetrathiol (BCAT) on a quartz crystal microbalance (QCM). Replacement of the phenol functionalities of p-tert-butyl-calix[4]arene with thiols enables the self assembly of these basket-shaped, complexing agents onto a mercury-coated QCM. The results demonstrate that the BCAT cage exhibits reversible, shape- or size-selective adsorption of various organic pollutants at the low ppm level in water
Keywords :
chemical sensors; crystal resonators; microbalances; monolayers; organic compounds; quartz; water pollution measurement; Hg-SiO2; aqueous liquid media; basket-shaped complexing agents; chemical sensing; environmental science; low ppm level; mercury-coated quartz crystal; modified calixarene; organic pollutants; p-tert-butylcalix[4]arenetetrathiol; quartz crystal microbalance; self-assembled monolayers; sensitive detection; size-selective adsorption; thiols; trace aromatic organics; water pollution; Assembly; Chemical sensors; Chemistry; Frequency; Gold; Rough surfaces; Surface acoustic waves; Surface roughness; Transducers; Water pollution;
Conference_Titel :
Solid State Sensors and Actuators, 1997. TRANSDUCERS '97 Chicago., 1997 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-3829-4
DOI :
10.1109/SENSOR.1997.635481
