Faculty Profiles - ZHANG, Hedong

Papers - ZHANG, Hedong

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Changes in Friction Properties of Monolayer Lubricant Films Induced by Development of Molecules' Bonding Reviewed

H. Zhang, Y. Mitsuya, Y. Fujikawa, A. Fuwa, Y. He, K. Fukuzawa

Tribology Letters Vol. 28 ( 2 ) page： 163-170 2007.11

Stiffness and Damping of Thin PFPE Lubricant Bridging Between Magnetic Disk and Diamond Probe Tip Reviewed

Y. Mitsuya, Y. Ohshima, H. Zhang, K. Aoyama, T. Kawai, K. Fukuzawa

ASME Journal of Tribology Vol. 129 ( 4 ) page： 720-728 2007.10

*Direct visualization of molecularly thin lubricant films using low-coherence phase-shifting interferometry Invited Reviewed

H. Zhang, T. Banno, Y. Mitsuya, K. Fukuzawa

IEEE Transaction on Magnectics Vol. 43 ( 9 ) page： 3699-3704 2007.9

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We have developed a method utilizing low-coherence phase-shifting interferometry (LCPSI) to directly visualize molecularly thin lubricant films coated on diamond-like carbon (DLC) surfaces. The measurement accuracy is guaranteed by the use of a low-coherence light source, a feedback-controlled phase-shifting system, and an image subtraction method. By measuring nanometer-thick perfluoropolyether films coated on DLC surfaces, we demonstrated that the LCPSI is capable of providing real-time three-dimensional measurements at a sub-nanometer thickness resolution and a spatial resolution of several micrometers.

DOI： 10.1109/TMAG.2007.902973

Evaluations of tribological characteristics of PFPE lubricants on DLC surfaces of magnetic disks Reviewed

Yinbo He, Yosuke Fujikawa, Hedong Zhang, Kenji Fukuzawa, Yasunaga Mitsuya

Tribology Letters Vol. 27 ( 1 ) page： 1-11 2007.7

低コヒーレンス位相シフト干渉法を用いたナノ潤滑膜の三次元画像計測 Reviewed Open Access

張賀東，三矢保永，坂野貴裕，福澤健二

日本機械学会論文集(C編) Vol. 73 ( 730 ) page： 1862-1868 2007.6

Evaluation of spreading characteristics of monolayer lubricant films on magnetic disks using molecular dynamics simulation Reviewed

Y. Tagaya, K. Fukuzawa, H. Zhang, Y. Mitsuya

IEEE Transaction on Magnectics Vol. 43 ( 6 ) page： 2229-2231 2007.6

Head-disk spacing measurement based on Michelson interferometry using white light illumination Reviewed

Yinbo He, Hedong Zhang, Yasunaga Mitsuya, Kenji Fukuzawa

Microsystem Technologies Vol. 13 ( 7 ) page： 647-655 2007.4

回折シミュレーションに基づく溝状テクスチャ付き表面における分子潤滑膜の表面流動特性の測定 Reviewed Open Access

張賀東，三矢保永，山田麻衣子，福澤健二

日本機械学会論文集(C編) Vol. 73 ( 727 ) page： 863-870 2007.3

*Self-organized patterning of molecularly thin liquid polymer films utilizing molecular flow induced by ultraviolet irradiation Reviewed Open Access

Hedong Zhang, Yasunaga Mitsuya, Natsuko Fukuoka, Masashi Imamura, Kenji Fukuzawa

Applied Physics Letters Vol. 90 page： 123119(1-3) 2007.3

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

A self-organized patterning method for molecularly thin liquid polymer films on solid surfaces has been demonstrated. In contrast to conventional methods that prepattern solid surfaces and then use the patterns as templates for polymer films, this method utilizes self-organization of polymers induced by ultraviolet (UV) radiation through a mask, thereby directly patterning the polymer films and omitting the prepatterning process. Such UV irradiation locally modified the interaction between polymer films and solid surfaces. As a result, molecular flow occurred at the boundary between the irradiated and nonirradiated areas, leading to three-dimensional surface structures.

DOI： 10.1063/1.2716358

Open Access

Mechanical design and force calibration of dual-axis micro-mechanical probe for friction force microscopy Reviewed

page： 034308(1-3) 2007.2

Nanofabrication of solid surface using probe oxidation Reviewed

Kenji Fukuzawa, Takanori Deguchi, Takuro Muramatsu, Hedong Zhang, Yasunaga Mitsuya

Microsystem Technologies page： Published online 2006.12

摩擦力・荷重の独立測定可能な摩擦力顕微鏡用マイクロプローブ Reviewed Open Access

福澤健二，寺田諭，式田光宏，雨川洋章，張賀東，三矢保永

日本機械学会論文集(C編) Vol. 72 ( 723 ) page： 3655-3664 2006.11

Measurement of spreading characteristics of molecularly thin lubricant films over grooved solid surfaces based on diffraction simulations Reviewed

Hedong Zhang, Yasunaga Mitsuya, Maiko Yamada, Kenji Fukuzawa

Microsystem Technologies page： Published online 2006.11

Visualization of Dewetting of Molecularly Thin Lubricant on Magnetic Disks by Ellipsometric Microscopy Reviewed

Kenji Fukuzawa, Taichi Shimuta, Tomohiko Yoshida, Hedong Zhang, Yasunaga Mitsuya

IEEE Transaction on Magnectics Vol. 42 ( 10 ) page： 2495-2497 2006.10

Dual-axis micro-mechanical probe for independent detection of lateral and vertical forces Reviewed

K. Fukuzawa, S. Terada, M. Shikida, H. Amakawa, H. Zhang, Y. Mitsuya

Applied Physics Letters Vol. 89 page： 173120(1-3) 2006.10

ナノ厚さ潤滑膜のディウェッティング現象の可視化観測 Reviewed

福澤健二，志牟田太一，吉田智彦，張賀東，三矢保永

トライボロジスト Vol. 51 ( 9 ) page： 668-675 2006.9

分子動力学法による極性高分子潤滑膜の表面モルフォロジーの定量化－モルフォロジー変動の膜厚依存性－ Reviewed

尾形晋，張賀東，福澤健二，三矢保永

トライボロジスト Vol. 51 ( 8 ) page： 595-606 2006.8

Direct visualization of dewetting of molecularly thin liquid films on solid surfaces Reviewed

Vol. 22 ( 16 ) page： 6951-6955 2006.7

紫外線照射による分子潤滑膜のナノ凹凸テクスチャの形成 Reviewed Open Access

張賀東，三矢保永，福岡夏子，今村公嗣，福澤健二

日本機械学会論文集(C編) Vol. 72 ( 718 ) page： 1927-1935 2006.6

Monolithically fabricated double-ended tuning-fork-based force sensor Reviewed

Vol. 99 page： 094901(1-5) 2006.5

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Papers - ZHANG, Hedong