Gases adsorption on single-walled carbon nanotubes measured by piezoelectric quartz crystal microbalance

Efecto de la Curvatura de la Superficie en la Adsorción de Gases Simples sobre Materiales Carbonosos usando la Teoría del Funcional de la Densidad (DFT)

“…Experimentalmente, la energía de interacción en nanotubos con hidrógeno es 3.3 KJ/mol (Okamoto y Miyamoto, 2001), con nitrógeno 10.06 KJ/mol (Wei et al, 2003) y con metano 10.5 KJ/mol (Talapatra y Migone, 2002). Si bien, como en la mayoría de los cálculos GGA, las energías son inferiores a las experimentales, interesa determinar la magnitud de estas desviaciones y sus valores relativos que resultan en particular de esta base.…”

Characterization of single-wall carbon nanotubes by N2 adsorption

“…The reports in the literature indicate that this is a reasonable assumption [11,36,37]. Although SWNTs produced using different methods may have different physical micropore structures, provided that a process produces SWNTs that have similar pore size distributions and proportion of open pores, a fairly pure sample can be used as the standard sample for the calibration of the microporous region.…”

A novel SnO2 gas sensor doped with carbon nanotubes operating at room temperature

“…The solution includes about 28 wt.% Sn. The SWCNT materials studied herein were obtained from Carbon Nanotechnologies Inc., and comprised >90 at.% SWCNTs, produced via high-pressure CO dispro- portionation (HiPco) [27], with diameters of around 0.8 nm [28]. Fig.…”

“…The adsorption of gaseous molecules onto the surface of a CNT alters its electric properties, enabling the CNTs to act as gas sensors and operate at room temperature [17][18][19][20][21][22][23][24]. For example, Kong et al [17] developed a gas sensor based on individual single-walled carbon nanotubes (SWCNTs), whose electrical conductance responds quickly and sensitively to the exposure of the nanotubes to gaseous molecules, such as NO 2 and NH 3 .…”