Low temperature solution synthesis of reduced two dimensional Ti3C2 MXenes with paramagnetic behaviour. Yoon, Y., Le, T. A., Tiwari, A. P., Kim, I., Barsoum, M. W., & Lee, H. Nanoscale, 10(47):22429–22438, December, 2018. ![Low temperature solution synthesis of reduced two dimensional Ti3C2 MXenes with paramagnetic behaviour [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex MXenes – two dimensional, 2D, early transition metal, M, carbides and nitrides, X – are the latest addition to the 2D materials’ world. Herein, we report on a facile low temperature solution chemical synthesis method to reduce Ti3C2Tx multilayered, ML, MXenes. Using X-ray photoelectron spectroscopy, electron spin resonance, magnetization measurements and other techniques, we concluded that immersing Ti3C2Tx MLs in the reducing agent Li-ethylenediamine (Li-EDA) – held at temperatures varying from room to 120 °C – reduces the 2D layers creating Ti3+ ions and oxygen vacancies. Above a temperature (T) of ≈10 K, the magnetic susceptibilities, χ, are temperature independent, implying that the resulting powders are Pauli paramagnetic. The loss of the magnetic signal upon intercalation of Li+ or EDA, together with a Curie-like increase in χ at T \textless 10 K, is consistent with that of a disordered metal that is close to a metallic to insulator transition and proves that the magnetism is associated with the 2D flakes. This result is the first evidence of any magnetism of any MXene.
@article{yoon_low_2018,
title = {Low temperature solution synthesis of reduced two dimensional {Ti}3C2 {MXenes} with paramagnetic behaviour},
volume = {10},
issn = {2040-3372},
url = {http://pubs.rsc.org/en/content/articlelanding/2018/nr/c8nr06854b},
doi = {10.1039/C8NR06854B},
abstract = {MXenes – two dimensional, 2D, early transition metal, M, carbides and nitrides, X – are the latest addition to the 2D materials’ world. Herein, we report on a facile low temperature solution chemical synthesis method to reduce Ti3C2Tx multilayered, ML, MXenes. Using X-ray photoelectron spectroscopy, electron spin resonance, magnetization measurements and other techniques, we concluded that immersing Ti3C2Tx MLs in the reducing agent Li-ethylenediamine (Li-EDA) – held at temperatures varying from room to 120 °C – reduces the 2D layers creating Ti3+ ions and oxygen vacancies. Above a temperature (T) of ≈10 K, the magnetic susceptibilities, χ, are temperature independent, implying that the resulting powders are Pauli paramagnetic. The loss of the magnetic signal upon intercalation of Li+ or EDA, together with a Curie-like increase in χ at T {\textless} 10 K, is consistent with that of a disordered metal that is close to a metallic to insulator transition and proves that the magnetism is associated with the 2D flakes. This result is the first evidence of any magnetism of any MXene.},
language = {en},
number = {47},
urldate = {2019-10-20},
journal = {Nanoscale},
author = {Yoon, Yeoheung and Le, Thi Anh and Tiwari, Anand P. and Kim, Ikjoon and Barsoum, Michel W. and Lee, Hyoyoung},
month = dec,
year = {2018},
pages = {22429--22438}
}
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