Amorphization and recrystallization of single-crystalline hydrogen titanate nanowires by N~+ ion irradiation

Akshaya K. Behera; Stefan Facsko; Malay K. BandyopadyaySiddhartha DasShyamal Chatterjee

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Amorphization and recrystallization of single-crystalline hydrogen titanate nanowires by N~+ ion irradiation

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We report on the phase transformation of hydrogen titanate (H_2Ti_3O_7) nanowires induced by 50 keV N~+ ion irradiation at room temperature with fluences of 1 × 10~(15) ions/cm~2 and 1 × 10~(16) ions/cm~2, respectively. Using transmission electron microscopy, the internal structure of the ion irradiated nanowires is analyzed. At low fluence, a transformation from crystalline H_2Ti_3O_7 to amorphous TiO_2 is observed. However, at higher fluence, a remarkable crystalline-amorphous TiO_2 core-shell structure is formed. At this higher fluence, the recrystallization occurs in the core of the nanowire and the outer layer remains amorphous. The phase transformation and formation of core-shell structure are explained using the thermal spike model, radiation enhanced diffusion, and classical theory of nucleation and growth under non-equilibrium thermodynamics. X-ray photoelectron spectroscopy and Raman scattering reveal further insight into the structure of the nanowires before and after ion irradiation.

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《Journal of Applied Physics》 |2014年第23期|233505-1-233505-6|共6页
作者
Akshaya K. Behera; Stefan Facsko; Malay K. BandyopadyaySiddhartha DasShyamal Chatterjee;
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作者单位

School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar 751007, India;

Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany;

Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类应用物理学;
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Amorphization and recrystallization of single-crystalline hydrogen titanate nanowires by N~+ ion irradiation

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