Influence of sheet electron beam irradiation (SEBI) on water wettability of hydroxy apatites for artificial bone

1996 ◽  
Vol 463 ◽  
Author(s):  
J. Kawano ◽  
H. Izumi ◽  
K. Oguri ◽  
A. Tonegawa ◽  
T. Kawai ◽  
...  

ABSTRACTAn influence of sheet electron beam irradiation (SEBI) on the wettability is investigated of the hydroxy apatite (HAP) [Ca10(PO4)6(OH)2]. The wettability is one of the important factors to control bio-compatibility. The SEBI is homogeneously performed by an electrocurtain processor. The temperature of the sample is below 323 K just after the irradiation. The wettability is evaluated by measuring the wet angle θ in a drop of water. The SEBI increases the wettability. Based on rate process, the influence of SEBI on wettability is discussed. Using the SEBI, we can precisely control the surface condition of HAP.

1997 ◽  
Vol 477 ◽  
Author(s):  
K. Mori ◽  
T. Okada ◽  
K. Oguri ◽  
Y. Nishi

ABSTRACTThe influence of sheet electron beam irradiation ( SEBI ) on the water-wettability of the ( 100 ) plane on the Si wafer etched by hydrofluoric acid ( HF ) is investigated. The wettability energy is estimated from the contact angle of water. The SEBI treatment decreases the contact angle and increases the interfacial energy. Aging decreases the change in the interfacial energy. A rate process is inferred for the interfacial energy changes on the Si wafer.


2002 ◽  
Vol 2002.2 (0) ◽  
pp. 467-468
Author(s):  
Kazuya OGURI ◽  
Naoki YAMAGUCHI ◽  
Kohsuke TAKAHASHI ◽  
Akira TONEGAWA ◽  
Yoshitake NISHI

2001 ◽  
Vol 16 (2) ◽  
pp. 553-557 ◽  
Author(s):  
Kazuya Oguri ◽  
Nobuhiro Iwataka ◽  
Akira Tonegawa ◽  
Yoichi Hirose ◽  
Kazuo Takayama ◽  
...  

We developed a diamond surface that does not mist near the room temperature under a saturated humidity atmosphere, by sheet electron beam irradiation (SEBI) treatment. SEBI treatment decreased the time to clear vision of the diamond surface. Following SEBI treatment for 1.91 s (= 0.72 MGy) to a diamond surface, the time to clear vision was less than 2 s. The effective duration time was a few hours. Based on the results of the size distribution of the drops on the misting-free diamond surface following blowing for 3 s, we proposed an explanation for the short time to clear vision of the diamond surface treated by SEBI.


1997 ◽  
Vol 9 (1/2) ◽  
pp. 144-145 ◽  
Author(s):  
Yoshiaki SHIBUKAWA ◽  
Nobuhiro IWATAKA ◽  
Junichi KAWANO ◽  
Yoshitake NISHI ◽  
Akira TONEGAWA

2008 ◽  
Vol 72 (1) ◽  
pp. 35-38 ◽  
Author(s):  
Ryuichi Suenaga ◽  
Masae Kanda ◽  
Naoto Hironaka ◽  
Keisuke Iwata ◽  
Akira Tonegawa ◽  
...  

1997 ◽  
Vol 9 (1/2) ◽  
pp. 70-71 ◽  
Author(s):  
Akihiro KASASHIMA ◽  
Nobuhiro IWATAKA ◽  
Junichi KAWANO ◽  
Naoshige HONDA ◽  
Yoshitake NISHI ◽  
...  

1998 ◽  
Vol 540 ◽  
Author(s):  
K. Oguri ◽  
K. Sato ◽  
T. Izumi ◽  
A. Tonegawa ◽  
K. Takayama ◽  
...  

AbstractBy using an electron beam irradiation, reproducible active surface condition of misting can be obtained on the silicate glass. Since an electron beam irradiation activates the SiO2 surface, it controls and enhances the nucleation frequency of fine water drops. The dangling bond is one of reasons to activate the surface condition. Based on the results of electron spin resonance (ESR) spectra, the electron beam irradiation increases the density of E'-center on the surface.


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