caa a22 4500 445365897 CHVBK 20180317142930.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0318-9 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0318-9 4He Fluid in Extremely Narrow 1D Channels 1.5nm inDiameter [Elektronische Daten] [Taku Matsushita, Mitsunori Hieda, Nobuo Wada] To examine whether one-dimensional (1D) helium quantum fluid is realized in narrower channels than those studied previously, we have measured heat capacities of 4He adsorbed in nanoporous material FSM with straight 1D channels 1.5 nm in diameter. From the heat of desorption for adsorbed 4He, the coverage n f, up to which 4He film grows in the channels, is determined to be 15.4μmol/m2 using the Frenkel-Halsey-Hill model. At coverages sufficiently below n f, the temperature dependence of the 4He heat capacity has a shoulder, above which adsorbed 4He is delocalized from the substrate. On the other hand, the depression of the heat capacity indicating quantum effects has not been observed up to n f, which suggests that 4He film in the channels remains amorphous-like normal fluid. Just aboven f, the quantum effect is observed in 4He adatoms on the grain surface of FSM powder, which indicates that 1.5nm channels are slightly below the limit required to realize quantum effect in the inside 4He fluid. Springer Science+Business Media, LLC, 2010 4He film nationallicence One-dimensional state nationallicence Quantum fluid nationallicence Nano-scale channel nationallicence Matsushita Taku Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut Hieda Mitsunori Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut Wada Nobuo Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 536-543 0022-2291 162:5-6<536 2011 162 10909 https://doi.org/10.1007/s10909-010-0318-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0318-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matsushita Taku Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut NATIONALLICENCE 700 1- Hieda Mitsunori Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut NATIONALLICENCE 700 1- Wada Nobuo Department of Physics, Graduate School of Science, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 536-543 0022-2291 162:5-6<536 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer