Crystallinity in periodic nanostructure surface on Si substrates induced by near- and mid-infrared femtosecond laser irradiation

Miyagawa, Reina*; Kamibayashi, Daisuke*; Nakamura, Hirotaka*; Hashida, Masaki*; Zen, H.*; Somekawa, Toshihiro*; Matsuoka, Takeshi*; Ogura, Hiroyuki*; Sagae, Daisuke*; Seto, Yusuke*; et al.

Scientific Reports (Internet), 12, p.20955_1 - 20955_8, 2022/12

https://doi.org/10.1038/s41598-022-25365-1

We evaluated Laser-Induced Periodic Surface Structure (LIPSS) crystal structures using the stress imaging station at BL22XU of JAEA-BL on SPring-8. Crystallization of LIPPS was used different two types laser these are Ti:Sapphire laser (wavelength: 800 nm) and MIR-FEL (mid-infrared free electron laser, wavelength 11.4 m). These lasers are different in the laser pulse structure and the wavelength. We investigated on the effects of formed LIPSS crystallization using different kind of laser. Measured synchrotron X-ray energy is 30 keV and beam size is 20 m. Detector of diffracted X-ray is two-dimensional detector (PILATUS300K, DECTRIS). LIPSS formed using Ti:Sapphire laser has deformed structure with good crystallinity. LIPSS formed using MIR-FEL has dislocation or fault without structural stress. These results show depending on select of laser forming LIPPS structure. These information becomes important a point of the functional application of LIPSS.

Order-disorder phase transition of Sn/Ge(111) surface studied by reflection high-energy positron diffraction

Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko

e-Journal of Surface Science and Nanotechnology (Internet), 4, p.435 - 438, 2006/04

https://doi.org/10.1380/ejssnt.2006.435

no abstracts in English

Precise determination of surface Debye-temperature of Si(111)-77 surface by reflection high-energy positron diffraction

Fukaya, Yuki; Kawasuso, Atsuo; Hayashi, Kazuhiko; Ichimiya, Ayahiko

Applied Surface Science, 237(1-4), p.29 - 33, 2004/10

https://doi.org/10.1016/S0169-4332(04)01006-2

no abstracts in English

None

PNC TN7420 89-009, 47 Pages, 1988/11

PNC-TN7420-89-009.pdf:1.99MB

Cell culture on polymer prepared by radiation-induced grafting of various monomers

; Kaetsu, Isao

Appl.Biochem.Biotechnol., 8, p.505 - 513, 1983/00

https://doi.org/10.1007/BF02780383

no abstracts in English