The Experts below are selected from a list of 63066 Experts worldwide ranked by ideXlab platform
Atsushi Takahara - One of the best experts on this subject based on the ideXlab platform.
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effect of α substituents on Molecular Motion and wetting behaviors of poly fluoroalkyl acrylate thin films with short fluoroalkyl side chains
Polymer, 2014Co-Authors: Koji Honda, Ikuo Yamamoto, Masamichi Morita, Hiroki Yamaguchi, Hiroshi Arita, Ryohei Ishige, Yuji Higaki, Atsushi TakaharaAbstract:Abstract The effect of α-substituent on the Molecular Motion and wetting behavior of poly{2-(perfluorobutyl)ethyl acrylate} [PFA-C4], poly{2-(perfluorobutyl)ethyl methacrylate} [PFMA-C4], poly{2-(perfluorobutyl)ethyl α-fluoroacrylate} [PFFA-C4], and poly{2-(perfluorobutyl)ethyl α-chloroacrylate} [PFClA-C4] films were characterized by dynamic contact angle measurement, lateral force microscopy (LFM), wide angle X-ray diffraction (WAXD), and X-ray photoelectron spectroscopy (XPS). WAXD of oriented PFClA-C4 fiber suggested the presence of rod-like chain due to the presence of bulky α-substituent. The glass transition temperature (Tg) of PFFA-C4 and PFClA-C4 were well above the room temperature. The water repellencies of PFFA-C4 and PFClA-C4 were as high as that of PFMA-C4 and their oil repellency of PFFA-C4 and PFClA-C4 was higher than the PFMA-C4. This result was originated from the low main chain mobility of PFFA-C4 and PFClA-C4 due to the presence of bulky α-substituents. The effect of Molecular Motion on water repellency was clarified by the results of temperature dependence studies of dynamic contact angle, LFM, and surface chemical composition measured by XPS.
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effect of surface Molecular aggregation state and surface Molecular Motion on wetting behavior of water on poly fluoroalkyl methacrylate thin films
Macromolecules, 2010Co-Authors: Koji Honda, Masamichi Morita, Osami Sakata, Sono Sasaki, Atsushi TakaharaAbstract:The effect of surface Molecular Motion on the wetting behavior of water on the thin film surfaces of poly(fluoroalkyl methacrylate)s with various fluoroalkyl (Rf) groups [PFMA-Cy; y: fluoromethylene number in Rf groups, y = 1, 2, 4, 6, and 8] was characterized. The receding contact angle of PFMA-Cy with short Rf groups (y = 1, 2, 4, and 6) was larger than that of poly(fluoroalkyl acrylate) with short Rf groups [PFA-Cy, y ≤ 6]. This stable hydrophobicity observed for PFMA-Cy is due to the restriction of thermal Molecular Motion by the α-methyl group. Wide-angle X-ray diffraction (WAXD) and grazing incidence WAXD measurements revealed that the Rf groups [PFMA-Cy, y ≤ 6] were not crystallized. PFMA-C8 showed high advancing and receding contact angles due to the crystallization of fluoroalkyl groups at the surface region. The hydrophobicity of PFMA-C8 was improved after annealing due to the ordering of fluoroalkyl groups.
J Ullrich - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast D{sub 2}{sup +} rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a 'reaction-microscope' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ({approx}3000 fs) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast $\mathrm{D}_{2}{}^{+}$ rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a ``reaction-microscope'' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ($\ensuremath{\sim}3000\text{ }\text{ }\mathrm{fs}$) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
Th Ergler - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast D{sub 2}{sup +} rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a 'reaction-microscope' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ({approx}3000 fs) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast $\mathrm{D}_{2}{}^{+}$ rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a ``reaction-microscope'' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ($\ensuremath{\sim}3000\text{ }\text{ }\mathrm{fs}$) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
Maria Ribagorda - One of the best experts on this subject based on the ideXlab platform.
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control over Molecular Motion using the cis trans photoisomerization of the azo group
Beilstein Journal of Organic Chemistry, 2012Co-Authors: Estibaliz Merino, Maria RibagordaAbstract:Control over Molecular Motion represents an important objective in modern chemistry. Aromatic azobenzenes are excellent candidates as Molecular switches since they can exist in two forms, namely the cis (Z) and trans (E) isomers, which can interconvert both photochemically and thermally. This transformation induces a Molecular movement and a significant geometric change, therefore the azobenzene unit is an excellent candidate to build dynamic Molecular devices. We describe selected examples of systems containing an azobenzene moiety and their Motions and geometrical changes caused by external stimuli.
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control over Molecular Motion using the cis trans photoisomerization of the azo group
Beilstein Journal of Organic Chemistry, 2012Co-Authors: Estibaliz Merino, Maria RibagordaAbstract:Control over Molecular Motion represents an important objective in modern chemistry. Aromatic azobenzenes are excellent candidates as Molecular switches since they can exist in two forms, namely the cis (Z) and trans (E) isomers, which can interconvert both photochemically and thermally. This transformation induces a Molecular movement and a significant geometric change, therefore the azobenzene unit is an excellent candidate to build dynamic Molecular devices. We describe selected examples of systems containing an azobenzene moiety and their Motions and geometrical changes caused by external stimuli.
Artem Rudenko - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast D{sub 2}{sup +} rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a 'reaction-microscope' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ({approx}3000 fs) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
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spatiotemporal imaging of ultrafast Molecular Motion collapse and revival of the d 2 nuclear wave packet
Physical Review Letters, 2006Co-Authors: Th Ergler, Artem Rudenko, B Feuerstein, K Zrost, C D Schroter, R Moshammer, J UllrichAbstract:We report on a real-time imaging of the ultrafast $\mathrm{D}_{2}{}^{+}$ rovibrational nuclear wave-packet Motion performed using a combination of a pump-probe setup with 7 fs laser pulses and a ``reaction-microscope'' spectrometer. We observe fast dephasing (collapse) of the vibrational wave packet and its subsequent revival and prove rotational excitation in ultrashort laser pulses. Channel-selective Fourier analysis of the wave packet's long-term ($\ensuremath{\sim}3000\text{ }\text{ }\mathrm{fs}$) evolution allows us to resolve its individual constituents, revealing unique information on the mechanisms of strong-field ionization and dissociation.
