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Chemical sensors for sensing gas adsorbed on the inner surface of carbon nanotube channels
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10.1063/1.2722196
/content/aip/journal/apl/90/15/10.1063/1.2722196
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/15/10.1063/1.2722196
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Figures

Image of FIG. 1.
FIG. 1.

SEM images of CNT arrays fabricated on an AAM at : (a) after etching in NaOH solution and (b) after coating polymer and then ion milling slightly to open the pores.

Image of FIG. 2.
FIG. 2.

(Color online) Schematics of the fabrication of a chemical sensor using CNT arrays fabricated on an AAM. The processes involve (a) ion milling of one-half of the top and the bottom surface of the other half except a block of the membrane in the center, and connection of an electrode on each unmilled surface; (b) coating and curing of polymer solution, and opening of the mouths of the channels; and (c) detection of gas.

Image of FIG. 3.
FIG. 3.

(Color online) Processes of sensing gas and recovering the sensor based on the CNTs fabricated on an AAM at room temperature for various application times of a dc voltage of . For each period from the origin, the applied voltage and kind of gas flowed were and Ar, and a gas mixture of Ar and , and Ar, and and Ar, respectively. The concentration of was and the gas flow rate was . The measured recovery time vs the application time of is shown in the inset.

Image of FIG. 4.
FIG. 4.

(Color online) Processes of sensing gas and recovering the sensor based on the CNTs fabricated on an AAM at room temperature for various application times of a dc voltage of . The concentration of was and the gas flow rate was . The measured recovery time vs the application time of is shown in the inset.

Image of FIG. 5.
FIG. 5.

(Color online) Response of the sensor as a function of the and concentrations.

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/content/aip/journal/apl/90/15/10.1063/1.2722196
2007-04-11
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Chemical sensors for sensing gas adsorbed on the inner surface of carbon nanotube channels
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/15/10.1063/1.2722196
10.1063/1.2722196
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