Toluene MIME sensor response

The MIME sensor response to toluene displays a dependence on both the core and shell dimensions of its cluster conq)onent. When the matrix of clusters depicted in Table 1 is investigated, optimum sensitivities are found for both the core diameter and the shell thickness in the midrange of the matrix. Clearly two effects operate in each case. In the latter, a thicker shell requires more sorbed vapor to achieve an amount of swelling conparable swelling to that of a thinner shell, while a thinner shell has less of an organic character to solvate the... 

The response of a Au CS(y. /) MIME sensor to five 60 sec exposiw-purge cycles of toluene at high and low vapor concentrations is presented in Figure. ... 

Figure 3. Response of Au C5(/.7) MIME sensor to five 60 sec exposure-purge cycles of toluene at high and low vapor concenh tions. The right axis indicates the current change in the MIME device, and (he left axis is the sensor response when the current change is converted to a frequency. (Reproduced from NRL Review. U.S. Government work in the public domain.)...

Figui 4. Vapor response isotherms of the Au C8(I l) MIME sensor to toluene, water and 1-propanol vapors based on 15°C vapor pressure. The inset displays the toluene response down to a 2.7 ppm concentration. 

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