Raman evidence for pressure-induced formation of diamondene.
Raman evidence for pressure-induced formation of diamondene.
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压力诱导形成金刚石烯的拉曼证据。
DOI：
10.1038/s41467-017-00149-8
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发表时间：
2017-07-21
影响因子：
16.6
通讯作者：
Cançado LG
中科院分区：
文献类型：
--
作者：
Martins LGP;Matos MJS;Paschoal AR;Freire PTC;Andrade NF;Aguiar AL;Kong J;Neves BRA;de Oliveira AB;Mazzoni MSC;Filho AGS;Cançado LG
尽管金刚石薄膜技术已经发展到了先进阶段，其应用范围从超导性到生物传感，但实现稳定且原子厚度的二维金刚石材料（在此命名为金刚石）仍然是即将到来的。金刚烷是一种具有自旋极化带的铁磁半导体，具有体相和薄膜相的优异性质。在这里，我们通过在高压下对双层石墨烯进行拉曼光谱分析，为金刚烯的形成提供了光谱证据。解释的结果中的Kohn异常与有限大小的剩余的石墨烯网站所包围的金刚石矩阵的故障。采用从头计算和分子动力学模拟来阐明金刚烯形成的机制，这需要两层或多层石墨烯在特定化学基团如羟基或氢的存在下经受高压。二维金刚石的合成是金刚石薄膜技术的最终目标。在这里，作者在压力下对双层石墨烯进行了拉曼光谱分析，并获得了金刚石形成的光谱证据，金刚石是一种原子级薄的金刚石。
Despite the advanced stage of diamond thin-film technology, with applications ranging from superconductivity to biosensing, the realization of a stable and atomically thick two-dimensional diamond material, named here as diamondene, is still forthcoming. Adding to the outstanding properties of its bulk and thin-film counterparts, diamondene is predicted to be a ferromagnetic semiconductor with spin polarized bands. Here, we provide spectroscopic evidence for the formation of diamondene by performing Raman spectroscopy of double-layer graphene under high pressure. The results are explained in terms of a breakdown in the Kohn anomaly associated with the finite size of the remaining graphene sites surrounded by the diamondene matrix. Ab initio calculations and molecular dynamics simulations are employed to clarify the mechanism of diamondene formation, which requires two or more layers of graphene subjected to high pressures in the presence of specific chemical groups such as hydroxyl groups or hydrogens. The synthesis of two-dimensional diamond is the ultimate goal of diamond thin-film technology. Here, the authors perform Raman spectroscopy of bilayer graphene under pressure, and obtain spectroscopic evidence of formation of diamondene, an atomically thin form of diamond.
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影响因子：
4.1
作者：
Krauss, AR;Auciello, O;Ding, MQ
通讯作者：
Ding, MQ
影响因子：
10.8
作者：
Kvashnin, Alexander G.;Chernozatonskii, Leonid A.;Sorokin, Pavel B.
通讯作者：
Sorokin, Pavel B.
影响因子：
2.1
作者：
Clark, S. M.;Jeon, Ki-Joon;Yoo, Choong-Shik
通讯作者：
Yoo, Choong-Shik
DOI：
10.1073/pnas.0811754106
发表时间：
2009-05-05
影响因子：
11.1
作者：
Huang, Mingyuan;Yan, Hugen;Hone, James
通讯作者：
Hone, James
影响因子：
2.9
作者：
HOOVER, WG
通讯作者：
HOOVER, WG