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Dive into the research topics where Yukiko Ikeda is active.

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Featured researches published by Yukiko Ikeda.


Colloids and Surfaces B: Biointerfaces | 2000

Ultra-hydrophobic fluorine polymer by Ar-ion bombardment.

Youichi Inoue; Yasuhiro Yoshimura; Yukiko Ikeda; Akiomi Kohno

A study has been made of the improvement of the hydrophobicity of a fluorine-polymer (polytetra-fluorinethylene, PTFE) by Ar-ion bombardment. Ar-ion bombardment to PTFE) by Ar-ion bombardment. Ar-ion bombardment to PTFE sheets was carried out at the fluences ranging from 3.1x10(20) to 18.3x10(20) ions/m(2). The beam current densities were ranged from 1.25 to 7.5 A/m(2). The hydrophobicity of modified materials has been investigated by means of a sessile drop method of water. The roughness, morphology and structure of bombarded specimens have been estimated as a function of beam current density and acceleration energy. It was found that Ar-bombardment causes the contact angle of water to increase from the original value 103 to 170 degrees. The results indicate that Ar-bombardment at an optional condition results in the formation of ultrahydrdophobic surfaces. The effects of Ar-bombardment to hydrophobicity of PTFE are discussed with the relationship among roughness, morphology and chemical bonding states of the surfaces.


Surface & Coatings Technology | 2001

Oil-repellent treatment of a flying slider in a hard disk drive

Yasuhiro Yoshimura; Takanori Aono; Yukiko Ikeda; Yoshishige Endou; Hiromitsu Tokisue; Akiomi Kouno

The effectiveness of various oil-repellent treatments was evaluated by measuring the contact angles of mineral oil on the surface of a slider of a hard disk drive. The contact angle on an untreated slider was 20°; it was 51° on a slider dipped in FAS solution (2-(heptadecafluorooctyl)-ethyltrimethoxysilane) and heated to 393 K; 68° on a slider dipped in FASI solution (a octadecafluorooctane solution of FAS treated by hydrolysis and polymerization) and heated to 393 K; 80° on a slider vapor-deposited with FAS solution at 433 K; 80° on a slider dipped in FASI solution after ultraviolet radiation (UV) and heated to 393 K; and 81° on a slider irradiated by UV after being dipped in FASI solution. These results indicate that a compact coating of FAS can be formed, even on the slider surface of a carbon film with few hydroxyl groups, by treating the surface with FAS solution or FASI solution.


Archive | 1998

Magnetic hard disk drive and process for producing the same

Hiromitsu Tokisue; Sunao Yonekawa; Nobuyuki Ishii; Yasuyuki Horiguchi; Yoshishige Endo; Yasuhiro Yoshimura; Yutaka Ito; Osamu Narisawa; Hiroshi Yuyama; Youichi Inoue; Yukiko Ikeda


Archive | 2001

Process for producing a magnetic head slider

Hiromitsu Tokisue; Sunao Yonekawa; Nobuyuki Ishii; Yasuyuki Horiguchi; Yoshishige Endo; Yasuhiro Yoshimura; Yutaka Ito; Osamu Narisawa; Hiroshi Yuyama; Youichi Inoue; Yukiko Ikeda


Archive | 1999

Chip for use in nucleic acid separation, structural element and process for forming the structural element

Yukiko Ikeda; Yoshishige Endo; Yasuhiro Yoshimura; Takao Terayama; Kenji Yasuda; Toshinari Sakurai; Tetsuo Yokoyama; Takanori Aono


Archive | 2000

Nucleic acid separating vessel, a method of manufacturing the nucleic acid separating vessel, and a method for separating the nucleic acid

Shinichi Fukuzono; Tetsuo Yokoyama; Yukiko Ikeda; Yoshishige Endo


Archive | 1999

FORMATION METHOD OF CHIP AND STRUCTURED MATERIAL USED FOR ISOLATION OF NUCLEIC ACID

Takanori Aono; Kiju Endo; Shinichi Fukuzono; Yukiko Ikeda; Tomoya Sakurai; Takao Terayama; Kenji Yasuda; Tetsuo Yokoyama; Yasuhiro Yoshimura; 健二 保田; 保廣 吉村; 孝男 寺山; 智也 桜井; 哲夫 横山; 由紀子 池田; 真一 福薗; 喜重 遠藤; 宇紀 青野


Journal of The Surface Finishing Society of Japan | 2000

Effects of Roughness and Chemical Composition of an Ar Ion-Implanted Fluorine-Polymer on Water Repellency

Youichi Inoue; Yasuhiro Yoshimura; Yukiko Ikeda; Akiomi Kohno


Archive | 1999

Centrifugal separator and sample preparation device using the separator

Kazunori Okano; Katsuji Murakawa; Shinichi Fukuzono; Yukiko Ikeda


Journal of The Society of Powder Technology, Japan | 2009

Study on Decomposition Mechanism of Rhodamine B with Photocatalytic Composite Particles

Takanori Aono; Yukiko Ikeda; Yasuhiro Yoshimura; Yoshishige Endoh

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