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arXiv 1402.0191cond-mat.mtrl-scicond-mat.mes-hall
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富勒烯薄膜中密集电子激发的纳米径迹

Nano tracks in fullerene film by dense electronic excitations

P. Kumar, D. K. Avasthi, J. Ghatak, P. V. Satyam, R. Prakash, A. Kumar

摘要:

本文利用高分辨透射电子显微镜(HRTEM)研究了团簇离子和单原子离子束在富勒烯(C60)薄膜中形成纳米径迹的过程。用30 MeV的C60团簇束和120 MeV的Au单原子束分别以垂直和掠射角对碳膜栅进行辐照。研究表明,团簇束产生的潜径迹平均直径约为20 nm。与单原子束相比,通过团簇束形成大尺寸纳米轨道归因于大的电子能量密度的沉积。

英文摘要:

In the present work, we investigate the formation of nano tracks by cluster and mono-atomic ion beams in the fullerene (C60) thin films by High Resolution Transmission Electron Microscopy (HRTEM). The fullerene films on carbon coated grids were irradiated by 30 MeV C60 cluster beam and 120 MeV Au mono-atomic beams at normal and grazing angle to the incident ion beams. The studies show that the cluster beam creates latent tracks of an average diameter of around 20 nm. The formation of large size nano tracks by cluster beam is attributed to the deposition of large electronic energy density as compared to mono-atomic beams.

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