OPTICAL CONSTANTS OF NH3AND NH3:N2AMORPHOUS ICES IN THE NEAR-INFRARED AND MID-INFRARED REGIONS

Zanchet, Alexandre; Rodrı́guez-Lazcano, Y.; Gálvez, Óscar; Herrero, Vı́ctor J.; Escribano, Rafael; Maté, Belén

doi:10.1088/0004-637x/777/1/26

Cited by 25 publications

(44 citation statements)

References 49 publications

(78 reference statements)

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“…The experimental setup has been described in detail in previous works (Satorre et al 2013;Zanchet et al 2013), although some improvements have been introduced for this study. Basically, the setup at IEM in Madrid consists of a high vacuum chamber that works in the 10 −8 mbar range, provided with a closed helium cycle cryostat and coupled to a Bruker Vertex 70 FTIR spectrometer.…”

Section: Methodsmentioning

confidence: 99%

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OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

Molpeceres

Satorre²,

Ortigoso

et al. 2016

ApJ

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We present a spectroscopic study of methane-ethane ice mixtures. We have grown CH 4 :C 2 H 6 mixtures with ratios 3:1, 1:1, and 1:3 at 18 and 30 K, plus pure methane and ethane ices, and have studied them in the near-infrared (NIR) and mid-infrared (MIR) ranges. We have determined densities of all species mentioned above. For amorphous ethane grown at 18 and 30 K we have obtained a density of 0.41 and 0.54 g cm −3 , respectively, lower than a previous measurement of the density of the crystalline species, 0.719 g cm −3. As far as we know this is the first determination of the density of amorphous ethane ice. We have measured band shifts of the main NIR methane and ethane features in the mixtures with respect to the corresponding values in the pure ices. We have estimated band strengths of these bands in the NIR and MIR ranges. In general, intensity decay in methane modes was detected in the mixtures, whereas for ethane no clear tendency was observed. Optical constants of the mixtures at 30 and 18 K have also been evaluated. These values can be used to trace the presence of these species in the surface of trans-Neptunian objects. Furthermore, we have carried out a theoretical calculation of these ice mixtures. Simulation cells for the amorphous solids have been constructed using a Metropolis Monte Carlo procedure. Relaxation of the cells and prediction of infrared spectra have been carried out at density functional theory level.

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Section: Methodsmentioning

confidence: 99%

“…In the NIR a different methodology that does not involve any iterative fitting (Mastrapa et al 2008;Zanchet et al 2013) was employed. In this case, after subtracting an adequate baseline to the absorbance spectra to remove IR interferences, k values are extracted via the Lambert-Beer law.…”

Section: Optical Constants N and Kmentioning

confidence: 99%

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

Molpeceres

Satorre²,

Ortigoso

et al. 2016

ApJ

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“…This work has been carried out in two different laboratories, one devoted to measurements of density and visible refractive index, and the other to IR spectroscopy of ices. They have been described elsewhere (Satorre et al 2013;Zanchet et al 2013;Molpeceres et al 2016), so that only a brief description is given here.…”

Section: E X P E R I M E N Ta L S E T U Pmentioning

confidence: 99%

“…(1:0) The procedure to calculate the optical constants varies depending on the spectral region considered, as described in previous works (Zanchet et al 2013;Molpeceres et al 2016). The software, developed in our group, is available online in our web page (http://www.iem.csic.es/fismol/fmap/descarga.htm).…”

Section: Peak Positionmentioning

confidence: 99%

“…The software, developed in our group, is available online in our web page (http://www.iem.csic.es/fismol/fmap/descarga.htm). An iterative method is implemented in the MIR with an algorithm described in detail by Zanchet et al (2013). Briefly, two multidimensional functions, defined as differences between experimental and calculated spectra, are minimized iteratively.…”

Section: Peak Positionmentioning

confidence: 99%

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Physical and spectroscopic properties of pure C₂H₄and CH₄:C₂H₄ices

Molpeceres

Satorre

Ortigoso

et al. 2016

Mon. Not. R. Astron. Soc.

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Physical and spectroscopic properties of ices of C 2 H 4 and CH 4 :C 2 H 4 mixtures with 3:1, 1:1 and 1:3 ratios have been investigated at 30 K. Two laboratories are involved in this work. In one of them, the density and refractive index of the samples have been measured by using a cryogenic quartz microbalance and laser interferometric techniques. In the other one, IR spectra have been recorded in the near-and mid-infrared regions, and band shifts with respect to the pure species, band strengths of the main bands, and the optical constants in both regions have been determined. Previous data on ethylene and the mixtures studied here were scarce. For methane, both the wavenumbers and band strengths have been found to follow a regular pattern of decrease with increasing dilution, but no pattern has been detected for ethylene vibrations. The method employed for the preparation of the samples, by vapour deposition under vacuum, is thought to be adequate to mimic the structure of astrophysical ices. Possible astrophysical implications, especially by means of the optical constants reported here, have been discussed.

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Harnessing the Volume Expansion of MoS₃ Anode by Structure Engineering to Achieve High Performance Beyond Lithium‐Based Rechargeable Batteries

Ma¹,

Zhang²,

Wang³

et al. 2021

Advanced Materials

104

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Beyond‐lithium‐ion storage devices are promising alternatives to lithium‐ion storage devices for low‐cost and large‐scale applications. Nowadays, the most of high‐capacity electrodes are crystal materials. However, these crystal materials with intrinsic anisotropy feature generally suffer from lattice strain and structure pulverization during the electrochemical process. Herein, a 2D heterostructure of amorphous molybdenum sulfide (MoS3) on reduced graphene surface (denoted as MoS3‐on‐rGO), which exhibits low strain and fast reaction kinetics for beyond‐lithium‐ions (Na+, K+, Zn2+) storage is demonstrated. Benefiting from the low volume expansion and small sodiation strain of the MoS3‐on‐rGO, it displays ultralong cycling performance of 40 000 cycles at 10 A g−1 for sodium‐ion batteries. Furthermore, the as‐constructed 2D heterostructure also delivers superior electrochemical performance when used in Na+ full batteries, solid‐state sodium batteries, K+ batteries, Zn2+ batteries and hybrid supercapacitors, demonstrating its excellent application prospect.

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OPTICAL CONSTANTS OF NH₃AND NH₃:N₂AMORPHOUS ICES IN THE NEAR-INFRARED AND MID-INFRARED REGIONS

Cited by 25 publications

References 49 publications

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

Physical and spectroscopic properties of pure C₂H₄and CH₄:C₂H₄ices

Harnessing the Volume Expansion of MoS₃ Anode by Structure Engineering to Achieve High Performance Beyond Lithium‐Based Rechargeable Batteries

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OPTICAL CONSTANTS OF NH3AND NH3:N2AMORPHOUS ICES IN THE NEAR-INFRARED AND MID-INFRARED REGIONS

Cited by 25 publications

References 49 publications

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH4:C2H6 ICES IN THE NEAR- AND MID-INFRARED

Physical and spectroscopic properties of pure C2H4and CH4:C2H4ices

Harnessing the Volume Expansion of MoS3 Anode by Structure Engineering to Achieve High Performance Beyond Lithium‐Based Rechargeable Batteries

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OPTICAL CONSTANTS OF NH₃AND NH₃:N₂AMORPHOUS ICES IN THE NEAR-INFRARED AND MID-INFRARED REGIONS

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

OPTICAL CONSTANTS AND BAND STRENGTHS OF CH₄:C₂H₆ ICES IN THE NEAR- AND MID-INFRARED

Physical and spectroscopic properties of pure C₂H₄and CH₄:C₂H₄ices

Harnessing the Volume Expansion of MoS₃ Anode by Structure Engineering to Achieve High Performance Beyond Lithium‐Based Rechargeable Batteries