Uniform Supersonic Expansion for FTIR Absorption Spectroscopy: The ν5 Band of (NO)2 at 26 K

Infrared spectroscopy of (CO2)N nanoparticles (30<N<14500) flowing in a uniform supersonic expansion

“…One of the CRESU chambers is equipped with Rayleigh scattering and time-of-flight ͑TOF͒ 20 facilities while the other is coupled to a Fourier transform interferometer. 21 The infrared spectra were recorded using a Bruker IFS 120 HR spectrometer probing the flow either axially 21 or radially. In the latter case a multireflection folded White optical device 22 was used in its 24 pass configuration to increase the absorption path length.…”

“…21. Figure 2͑a͒ shows a map obtained with a CO 2 injection of 0.5 slm ͑standard liters per minute, i.e., such a flow rate is relative to a gas considered under STP conditions: 273 K and 1 atm͒.…”

Development of a pulsed uniform supersonic gas expansion system based on an aerodynamic chopper for gas phase reaction kinetic studies at ultra-low temperatures

“…Laval nozzles are important tools in other fields such as powder metallurgy, including gas-assisted atomization (Allimant et al, 2009 andSi et al, 2014), narrow size nanoparticle synthesis (Li et al, 2008 andJung et al, 2008), or inertial separation of particles (Kanaoka et al, 2001). These type of nozzles can be found as well as part of apparatuses developed for studies concerning spray deposition (Jen et al, 2006), formation of super thin fibers (Blim et al, 2014), hydrogen production (Du et al, 2012), laser cutting (Man et al, 1999), homogeneous or binary nucleation (Kim et al, 2004 andTanimura et al, 2010), infrared (Tanimura et al, 1996 andBenidar et al, 2000) or microwave spectroscopy (Oldham et al, 2014), or hypersonic astrophysical jets simulations (Tordella et al, 2011).…”

Overtone spectroscopy of molecular complexes containing small polyatomic molecules

“…Small [129] and larger [130] roots and turbomolecular [131] pumping systems were also used over the years. The FTS-jet combination was first reported in the literature by Snavely [132] and then beautifully exploited by Quack [133][134][135], and their co-workers, before being practiced by more research groups including ours [129,[136][137][138][139][140][141][142]. In these works the technique was more systematically applied to investigate stronger fundamental bands than weaker overtone bands.…”