Probing of Ni-Encapsulated Ferromagnetic Boron Nitride Nanotubes by Time-Resolved and Steady-State Photoluminescence Spectroscopy
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- 作者：Arava Leela Mohana Reddy ; Bipin Kumar Gupta ; Tharangattu N. Narayanan ; Angel A. Mart铆 ; Pulickel M. Ajayan ; Gilbert C. Walker
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：June 14, 2012
- 年：2012
- 卷：116
- 期：23
- 页码：12803-12809
- 全文大小：392K
- 年卷期：v.116,no.23(June 14, 2012)
- ISSN：1932-7455
文摘
Here we report the synthesis of multifunctional Ni-encapsulated boron nitride nanotubes (BNNTs), with average diameter and length measuring 30 nm and 25 渭m, by a facile ball-milling鈥揷hemical vapor deposition route. The resulting BNNTs exhibit an intense blue emission peaking at 480 nm upon 365 nm excitation, and the time-resolved emission spectroscopy shows a photoluminescence decay lifetime of picoseconds. The SQUID magnetization measurements show an enhanced coercivity of 140 Oe. Obtained collective optical and magnetic properties of BNNT suggest that it could be an exceptional choice for future optomagnetic-based sensor devices, biomedical therapy, and bioimaging applications.