Conductive and transparent metallic nanowire networks are regarded as promising alternatives to Indium-Tin-Oxides (ITOs) in emerging flexible next-generation technologies due to their prominent optoelectronic properties and low-cost fabrication. The performance...

We report observation of new infrared bands of (CS2)2 and (CS2)3 in the region of the CS2 ν1+ ν3 combination band (at 4.5 m) using a quantum cascade laser. The complexes are formed in a pulsed supersonic slit-jet expansion of a gas mixture of carbon disulfide in helium. We have previously shown that the most stable isomer of (CS2)2 is a cross-shaped structure with D2d symmetry and that for (CS2)3 is a barrel-shaped structure with D3 symmetry. The dimer has one doubly degenerate infrared-active band in the ν1+ ν3 region of the CS2 monomer. This band is observed to have a rather small vibrational shift of -0.846 cm -1 . We expect one parallel and one perpendicular infrared-active band for the trimer but observe two parallel and one perpendicular bands. Much larger vibrational shifts of -8.953 cm -1 for the perpendicular band and -8.845 cm -1 and +16.681 cm -1 for the parallel bands are observed. Vibrational shifts and possible vibrational assignments, in the case of the parallel bands of the trimer, are discussed using group theoretical arguments.

International audienceWe report revisited experimentally retrieved and theoretically calculated He-broadened Lorentz half-width coefficients and He- pressure-shift coefficients of 45 carbon monoxide transitions in the 1<--0 band. The spectra analyzed in this study were recorded over a range of temperatures between 79 and 296 K. The He-broadened line parameters and their temperature dependences were retrieved using a multispectrum nonlinear least squares analysis program. The line shape models used in this study include Voigt, speed dependent Voigt, Rautian (to take into account confinement narrowing) and Rautian with speed dependence, all with an asymmetric component added to account for weak line mixing effects. We were unable to retrieve the temperature dependence of line mixing coefficients. A classical method was used to determine the He-narrowing parameters while quantum dynamical calculations were performed to determine He-broadening and He-pressure shifts coefficients at different temperatures. The line mixing coefficients were also derived from the exponential power gap law and the energy corrected sudden approximation. The current measurements and theoretical results are compared with other published results, where appropriate

Infrared spectra of Rg 1,2 -C 6 H 6 complexes (Rg = He, Ne, Ar) are observed in the region of the  12 fundamental of C 6 H 6 using a pulsed supersonic jet expansion and a tunable optical parametric oscillator laser source. The mixed trimer He -Ne -C 6 H 6 is also detected. Four bands are analyzed for each complex, namely  12 itself (3048 cm -1 ) and three linked combination bands (3079, 3100, and 3102 cm -1 ). The results are consistent with previous ultraviolet and microwave results, with Ne 2 -C 6 H 6 and He -Ne -C 6 H 6 being analyzed spectroscopically here for the first time.

Spectra of ethylene dimers and trimers are studied in the  11 and (for the dimer)  9 fundamental band regions of C 2 H 4 (2990 and 3100 cm -1 ) using a tunable optical parametric oscillator source to probe a pulsed supersonic slit jet expansion. The deuterated trimer has been observed previously, but this represents the first rotationally resolved spectrum of (C 2 H 4 ) 3 . The results support the previously determined cross-shaped (D 2d ) dimer and barrel-shaped (C 3h or C 3 ) trimer structures. However, the dimer spectrum in the  9 fundamental region of C 2 H 4 is apparently very perturbed and a previous rotational analysis is not well verified.