Tunable Magnetism of Organometallic Nanoclusters by Graphene Oxide On-Surface Chemistry
Tunable Magnetism of Organometallic Nanoclusters by Graphene Oxide On-Surface Chemistry
复制标题
DOI：
10.1038/s41598-019-50433-4
复制
发表时间：
2019-10
影响因子：
4.6
通讯作者：
M. Sakurai;Pradyot Koley;M. Aono
中科院分区：
文献类型：
--
作者：
M. Sakurai;Pradyot Koley;M. Aono
相互作用的分子自旋组装是自旋电子学和量子计算器件的一个有吸引力的候选者。在这里，我们报道了氨基二茂铁分子在氧化石墨烯(GO)片上的表面化学组装及其磁性。在GO表面，通过分子和片层之间的电荷转移而具有单独自旋的有机金属分子被排列在直径约为2 nm的纳米团簇中。通过对反应时间的人工微调，可以改变纳米团簇之间的间距，保持其大小不变。随着间距的减小，它们的磁性逐渐从顺磁行为转变为集体行为。通过在GO表面的纳米尺度排列，弱相互作用的分子自旋之间的集体性质的创造打开了一条分子磁性的新途径。
Assembly of interacting molecular spins is an attractive candidate for spintronic and quantum computing devices. Here, we report on-surface chemical assembly of aminoferrocene molecules on a graphene oxide (GO) sheet and their magnetic properties. On the GO surface, organometallic molecules having individual spins through charge transfer between the molecule and the sheet are arranged in nanoclusters having diameters of about 2 nm. The synthetic fine tuning of the reaction time enables to change the interspacing between the nanoclusters, keeping their size intact. Their magnetism changes from paramagnetic behavior to collective one gradually as the interspacing decreases. The creation of collective nature among weakly interacting molecular spins through their nanoscale arrangement on the GO surface opens a new avenue to molecular magnetism.