Formaldehyde gas sensing chip based on single-walled carbon nanotubes and thin water layer.
We report a unique gaseous formaldehyde sensing chip based on a combination between patterned single-walled carbon nanotube field effect transistors and a precisely controlled aqueous layer with photopolymerized polyelectrolytic gels. The proposed system reliably detects 0.1 ppb level formaldehyde gas, suggesting a new type of indoor air quality monitoring device.
Department of Chemistry, Seoul National University, Seoul 151-747, Korea.
Ji Yeon
JY
Kim
Joohyung
J
Lee
Seunghun
S
Hong
Taek Dong
TD
Chung
D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D005557:Formaldehyde / Q000032:analysis*; D005740:Gases / Q000032:analysis*; D006813:Humidity; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D014867:Water / Q000737:chemistry*
D005740:Gases; D037742:Nanotubes, Carbon; D011108:Polymers; D014867:Water; D005557:Formaldehyde; D012825:Silicon