Study of the displacement transition in SF

The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferre...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Hess, G.B. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite

Übergeordnetes Werk:	Enthalten in: Surface science - Amsterdam : Elsevier, 1964, 708
Übergeordnetes Werk:	volume:708

DOI / URN:	10.1016/j.susc.2021.121824

Katalog-ID:	ELV005737516

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245	1	0	\|a Study of the displacement transition in SF
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520			\|a The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K.
650		4	\|a Infrared spectroscopy
650		4	\|a Dynamic dipole interaction
650		4	\|a Ellipsometry
650		4	\|a Adsorbed films
650		4	\|a SF
650		4	\|a Graphite
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publishDate	2021
allfields	10.1016/j.susc.2021.121824 doi (DE-627)ELV005737516 (ELSEVIER)S0039-6028(21)00028-5 DE-627 ger DE-627 rda eng 540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Hess, G.B. verfasserin (orcid)0000-0002-2298-4149 aut Study of the displacement transition in SF 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K. Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite Enthalten in Surface science Amsterdam : Elsevier, 1964 708 Online-Ressource (DE-627)271176245 (DE-600)1479030-0 (DE-576)078412404 0039-6028 nnns volume:708 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines 33.68 Oberflächen Dünne Schichten Grenzflächen Physik 35.00 Chemie: Allgemeines AR 708
spelling	10.1016/j.susc.2021.121824 doi (DE-627)ELV005737516 (ELSEVIER)S0039-6028(21)00028-5 DE-627 ger DE-627 rda eng 540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Hess, G.B. verfasserin (orcid)0000-0002-2298-4149 aut Study of the displacement transition in SF 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K. Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite Enthalten in Surface science Amsterdam : Elsevier, 1964 708 Online-Ressource (DE-627)271176245 (DE-600)1479030-0 (DE-576)078412404 0039-6028 nnns volume:708 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines 33.68 Oberflächen Dünne Schichten Grenzflächen Physik 35.00 Chemie: Allgemeines AR 708
allfields_unstemmed	10.1016/j.susc.2021.121824 doi (DE-627)ELV005737516 (ELSEVIER)S0039-6028(21)00028-5 DE-627 ger DE-627 rda eng 540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Hess, G.B. verfasserin (orcid)0000-0002-2298-4149 aut Study of the displacement transition in SF 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K. Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite Enthalten in Surface science Amsterdam : Elsevier, 1964 708 Online-Ressource (DE-627)271176245 (DE-600)1479030-0 (DE-576)078412404 0039-6028 nnns volume:708 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines 33.68 Oberflächen Dünne Schichten Grenzflächen Physik 35.00 Chemie: Allgemeines AR 708
allfieldsGer	10.1016/j.susc.2021.121824 doi (DE-627)ELV005737516 (ELSEVIER)S0039-6028(21)00028-5 DE-627 ger DE-627 rda eng 540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Hess, G.B. verfasserin (orcid)0000-0002-2298-4149 aut Study of the displacement transition in SF 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K. Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite Enthalten in Surface science Amsterdam : Elsevier, 1964 708 Online-Ressource (DE-627)271176245 (DE-600)1479030-0 (DE-576)078412404 0039-6028 nnns volume:708 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines 33.68 Oberflächen Dünne Schichten Grenzflächen Physik 35.00 Chemie: Allgemeines AR 708
allfieldsSound	10.1016/j.susc.2021.121824 doi (DE-627)ELV005737516 (ELSEVIER)S0039-6028(21)00028-5 DE-627 ger DE-627 rda eng 540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Hess, G.B. verfasserin (orcid)0000-0002-2298-4149 aut Study of the displacement transition in SF 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K. Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite Enthalten in Surface science Amsterdam : Elsevier, 1964 708 Online-Ressource (DE-627)271176245 (DE-600)1479030-0 (DE-576)078412404 0039-6028 nnns volume:708 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines 33.68 Oberflächen Dünne Schichten Grenzflächen Physik 35.00 Chemie: Allgemeines AR 708
language	English
source	Enthalten in Surface science 708 volume:708
sourceStr	Enthalten in Surface science 708 volume:708
format_phy_str_mv	Article
bklname	Werkstoffkunde: Allgemeines Oberflächen Dünne Schichten Grenzflächen Chemie: Allgemeines
institution	findex.gbv.de
topic_facet	Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite
dewey-raw	540
isfreeaccess_bool	false
container_title	Surface science
authorswithroles_txt_mv	Hess, G.B. @@aut@@
publishDateDaySort_date	2021-01-01T00:00:00Z
hierarchy_top_id	271176245
dewey-sort	3540
id	ELV005737516
language_de	englisch
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author	Hess, G.B.
spellingShingle	Hess, G.B. ddc 540 bkl 51.00 bkl 33.68 bkl 35.00 misc Infrared spectroscopy misc Dynamic dipole interaction misc Ellipsometry misc Adsorbed films misc SF misc Graphite Study of the displacement transition in SF
authorStr	Hess, G.B.
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topic_title	540 530 DE-600 51.00 bkl 33.68 bkl 35.00 bkl Study of the displacement transition in SF Infrared spectroscopy Dynamic dipole interaction Ellipsometry Adsorbed films SF Graphite
topic	ddc 540 bkl 51.00 bkl 33.68 bkl 35.00 misc Infrared spectroscopy misc Dynamic dipole interaction misc Ellipsometry misc Adsorbed films misc SF misc Graphite
topic_unstemmed	ddc 540 bkl 51.00 bkl 33.68 bkl 35.00 misc Infrared spectroscopy misc Dynamic dipole interaction misc Ellipsometry misc Adsorbed films misc SF misc Graphite
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title	Study of the displacement transition in SF
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title_full	Study of the displacement transition in SF
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title_sort	study of the displacement transition in sf
title_auth	Study of the displacement transition in SF
abstract	The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K.
abstractGer	The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K.
abstract_unstemmed	The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic dipole coupling between SF6 molecules in the layer. Throughout the temperature range 65.3 to 110.2 K, a first order transition with large hysteresis was found in the SF6 monolayer displacement-recovery cycle driven by Kr spreading pressure. The hysteresis is asymmetric, with displacement going to completion at a sharp pressure, while the initial ~10% of recovery occurs much closer to the displacement pressure than the pressure allowing full recovery, especially above 95 K. Over the temperature range studied, an upper limit of 0.25% on the solubility of Kr in the SF6 layer was determined by the absence of a significant change in the collective vibrational mode frequency preceding displacement. Above 92 K, spectra indicate a small solubility of SF6 in the Kr monolayer, up to 4% approaching displacement of the Kr layer at T ≥ 98 K. Below 74 K the kinetics of SF6 displacement to bulk is sufficiently slow that the monolayer is readily compressed to a metastable bilayer covering half the surface, with both layers apparently 2 × 2 commensurate with the graphite substrate. The decay time constant of the confined bilayer to bulk SF6 crystallites is about 4 h at 65.3 K.
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title_short	Study of the displacement transition in SF
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up_date	2024-07-06T18:59:26.566Z
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Study of the displacement transition in SF

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