Understanding the scattering mechanism of single-walled carbon nanotube based gas sensors

• In the interaction between gas molecules with single-walled carbon nanotube (SWCNT) we show that as a result of collisions the gas scattering contributes with an important background signal and should be considered in SWCNT-based gas sensors. Experimental evidence of the collision-induced tube wall deformation is demonstrated using in situ X-ray absorption near-edge structure spectroscopy. Results support the occurrence of the scattering process and show how gas collisions may affect the electronic structure of SWCNTs.

Nyckelord

X-RAY-ABSORPTION

INTERCALATED GRAPHITE

CHEMICAL SENSORS

FINE-STRUCTURE

SPECTROSCOPY

ADSORPTION

PHOTOEMISSION

SENSITIVITY

BUNDLES

TECHNOLOGY

TEKNIKVETENSKAP

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