Presentation Information

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-E207-9]Poly(p-xylene) Coating for Improve Moisture and Water Resistance of n-Type Carbon Nanotubes

〇(M1)SOUTA TOUTANI¹, Yasuko Koshiba^1,2, Azumi Akiyama^1,2, Masahiro Funahashi^1,2, Shohei Horike^1,2,3 (1.Kobe Univ., 2.Res. Ctr. Membrane & Film Tech., Kobe. Univ., 3.Ctr. Environ. Mgmt., Kobe Univ.)

Keywords:

CNT,doping,parylene

n-type CNTs doped with the organic superbase TBD maintain stable n-type polarity for over six months in air at 100 °C, but degrade under high humidity due to the hygroscopic nature of TBD. To improve humidity and water resistance, parylene C was deposited on TBD-doped n-type CNT films via low-temperature plasma-enhanced vapor deposition. Raman spectroscopy revealed slight defect formation from plasma irradiation, but thermoelectric properties were largely unchanged, confirming minimal damage to the CNTs. Under room-temperature high-humidity and water-immersion conditions, encapsulated samples showed significantly improved retention of thermoelectric properties. However, no improvement was observed at high temperatures (100 °C in air; 85 °C/85 %RH), indicating that parylene C does not suppress thermally induced dedoping. These results show that parylene C encapsulation improves humidity resistance but not thermal stability of TBD-doped n-type CNT films.

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