Extension of the Equation for the Annihilation Lifetime of ortho -Positronium at a Cavity Larger than 1 nm in Radius K Ito, H Nakanishi, Y Ujihira
The Journal of Physical Chemistry B 103 (21), 4555-4558, 1999
209 1999 Free volume and permeabilities of O2 and H2 in Nafion membranes for polymer electrolyte fuel cells HFM Mohamed, K Ito, Y Kobayashi, N Takimoto, Y Takeoka, A Ohira
Polymer 49 (13-14), 3091-3097, 2008
132 2008 Oxygen permeability and free volume hole size in ethylene–vinyl alcohol copolymer film: temperature and humidity dependence M Muramatsu, M Okura, K Kuboyama, T Ougizawa, T Yamamoto, ...
Radiation Physics and Chemistry 68 (3-4), 561-564, 2003
123 2003 Multiple point adsorption in a heteropolymer gel and the Tanaka approach to imprinting: experiment and theory K Ito, J Chuang, C Alvarez-Lorenzo, T Watanabe, N Ando, AY Grosberg
Progress in polymer science 28 (10), 1489-1515, 2003
105 2003 Preparation of BTESE-derived organosilica membranes for catalytic membrane reactors of methylcyclohexane dehydrogenation T Niimi, H Nagasawa, M Kanezashi, T Yoshioka, K Ito, T Tsuru
Journal of membrane science 455, 375-383, 2014
104 2014 Structural characterization of thin-film polyamide reverse osmosis membranes J Albo, H Hagiwara, H Yanagishita, K Ito, T Tsuru
Industrial & Engineering Chemistry Research 53 (4), 1442-1451, 2014
90 2014 Positronium chemistry in porous materials Y Kobayashi, K Ito, T Oka, K Hirata
Radiation Physics and Chemistry 76 (2), 224-230, 2007
84 2007 Correlation study between free-volume holes and molecular separations of composite membranes for reverse osmosis processes by means of variable-energy positron annihilation … Z Chen, K Ito, H Yanagishita, N Oshima, R Suzuki, Y Kobayashi
The Journal of Physical Chemistry C 115 (37), 18055-18060, 2011
81 2011 Frustrations in polymer conformation in gels and their minimization through molecular imprinting T Enoki, K Tanaka, T Watanabe, T Oya, T Sakiyama, Y Takeoka, K Ito, ...
Physical review letters 85 (23), 5000, 2000
80 2000 Positronium formed by recombination of positron-electron pairs in polymers K Sato, D Shanai, Y Hotani, T Ougizawa, K Ito, K Hirata, Y Kobayashi
Physical review letters 96 (22), 228302, 2006
75 2006 New insights into the microstructure-separation properties of organosilica membranes with ethane, ethylene, and acetylene bridges R Xu, SM Ibrahim, M Kanezashi, T Yoshioka, K Ito, J Ohshita, T Tsuru
ACS applied materials & interfaces 6 (12), 9357-9364, 2014
74 2014 Intrinsic momentum distributions of positron and positronium annihilation in polymers K Sato, K Ito, K Hirata, RS Yu, Y Kobayashi
Physical Review B 71 (1), 012201, 2005
70 2005 Probing the elemental environment around the free volume in polymers with positron annihilation age− momentum correlation spectroscopy K Sato, H Murakami, K Ito, K Hirata, Y Kobayashi
Macromolecules 42 (13), 4853-4857, 2009
60 2009 Nanoporous structure of sputter-deposited silicon oxide films characterized by positronium annihilation spectroscopy Y Kobayashi, W Zheng, TB Chang, K Hirata, R Suzuki, T Ohdaira, K Ito
Journal of applied physics 91 (3), 1704-1706, 2002
60 2002 Gas-phase selective adsorption on functional monolayers immobilized on a highly sensitive quartz-crystal microbalance Y Okahata, K Matsuura, K Ito, Y Ebara
Langmuir 12 (4), 1023-1026, 1996
55 1996 Interlaboratory comparison of positron annihilation lifetime measurements for synthetic fused silica and polycarbonate K Ito, T Oka, Y Kobayashi, Y Shirai, K Wada, M Matsumoto, M Fujinami, ...
Journal of Applied Physics 104 (2), 026102, 2008
54 2008 Correlation Study between Oxygen Permeability and Free Volume of Ethylene− Vinyl Alcohol Copolymer through Positronium Lifetime Measurement K Ito, Y Saito, T Yamamoto, Y Ujihira, K Nomura
Macromolecules 34 (18), 6153-6155, 2001
54 2001 Experimental and theoretical study on small gas permeation properties through amorphous silica membranes fabricated at different temperatures M Kanezashi, T Sasaki, H Tawarayama, H Nagasawa, T Yoshioka, K Ito, ...
The Journal of Physical Chemistry C 118 (35), 20323-20331, 2014
42 2014 Positronium time-of-flight measurements of porous low- films RS Yu, T Ohdaira, R Suzuki, K Ito, K Hirata, K Sato, Y Kobayashi, J Xu
Applied physics letters 83 (24), 4966-4968, 2003
42 2003 High sensitivity of positron annihilation to thermal oxidation of polyethylene K Ito, Y Kobayashi, A Nanasawa
Applied physics letters 82 (4), 654-656, 2003
39 2003