Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk


Siddhartha Pathak

University of Nevada (US)

Ostatnie publikacje
1.  Jarząbek D.M., Harvey C., Levintant-Zayonts N., Wojciechowski T., Gniadek M., Krajewski M., Pathak S., Enhancement of mechanical properties of vertically aligned carbon nanotube arrays due to N+ ion irradiation, NANOTECHNOLOGY, ISSN: 0957-4484, DOI: 10.1088/1361-6528/ab8665, Vol.31, No.28, pp.285703-1-9, 2020

In this work we apply N+ ion irradiation on vertically aligned carbon nanotube (VACNT) arrays in order to increase the number of connections and joints in the CNT network. The ions energy was 50 keV and fluence 5 × 10^17 ions cm^−2. The film was 160 μm thick. SEM images revealed the ion irradiation altered the carbon bonding and created a sponge-like, brittle structure at the surface of the film, with the ion irradiation damage region extending ~4 μm in depth. TEM images showed the brittle structure consists of amorphous carbon forming between nanotubes. The significant enhancement of mechanical properties of the irradiated sample studied by the cyclic nanoindentation with a flat punch indenter was observed. Irradiation on the VACNT film made the structure stiffer, resulted in a higher percentage recovery, and reduced the energy dissipation under compression. The results are encouraging for further studies which will lead to create a class of materials - ion-irradiated VACNT films - which after further research may find application in storage or harvesting energy at the micro/nanoscale.

Słowa kluczowe:
vertically aligned carbon nanotubes, ion irradiation, nanoindentation

Afiliacje autorów:
Jarząbek D.M. - IPPT PAN
Harvey C. - University of Nevada (US)
Levintant-Zayonts N. - IPPT PAN
Wojciechowski T. - Institute of Physics, Polish Academy of Sciences (PL)
Gniadek M. - Uniwersytet Warszawski (PL)
Krajewski M. - IPPT PAN
Pathak S. - University of Nevada (US)

Abstrakty konferencyjne
1.  Jarząbek D.M., Harvey C., Levintant-Zayonts N., Daraio C., Dziekoński C., Wojciechowski T., Gniadek M., Pathak S., Mechanical properties of N+ion irradiated vertically aligned carbon nanotube arrays studied by nanoindentation, EUROMAT 2019, European Congress and Exhibition on Advanced Materials and Processes 2019, 2019-09-01/09-05, Stockholm (SE), No.PM6-5, pp.464, 2019

Kategoria A Plus


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