[23p-12M-1~13] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[23p-12M-12] Structural control of amorphous silica films using crystalline substrates

〇(M1)Sohei Ogasawara¹, Katelyn A. Kirchner², Kazuro Kizaki¹, Hiroo Tajiri³, Shinji Kohara⁴, Hiromichi Ohta⁵, John C. Mauro², Yasutaka Matsuo⁵ (1.Tohoku Univ., 2.Penn State Univ., 3.JASRI, 4.NIMS, 5.Hokkaido Univ.)

Keywords:

silica glass

For easier structural control of silica amorphous materials, we attempted to control the structure by chemical pressure by preparing SiO₂ amorphous thin films on Si crystalline substrates. In the present study, thinner SiO₂thin films showed a shift of the peak reflecting the amorphous mid-range structure and a decrease of the thermal conductivity. This suggests that the thinner films are more strongly affected by the substrate effect, and are in a different state than the bulk samples.