Doping Nanoscale Graphene Domains Improves Magnetism in Hexagonal Boron Nitride

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 12 vom: 12. März, Seite e1805778
1. Verfasser:	Fan, Mengmeng (VerfasserIn)
Weitere Verfasser:	Wu, Jingjie, Yuan, Jiangtan, Deng, Liangzi, Zhong, Ning, He, Liang, Cui, Jiewu, Wang, Zixing, Behera, Sushant Kumar, Zhang, Chenhao, Lai, Jiawei, Jawdat, BenMaan I, Vajtai, Robert, Deb, Pritam, Huang, Yang, Qian, Jieshu, Yang, Jiazhi, Tour, James M, Lou, Jun, Chu, Ching-Wu, Sun, Dongping, Ajayan, Pulickel M
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2019
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article bandgap graphene quantum dots heterostructures hexagonal boron nitride magnetism

Beschreibung
Zusammenfassung:	© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Carbon doping can induce unique and interesting physical properties in hexagonal boron nitride (h-BN). Typically, isolated carbon atoms are doped into h-BN. Herein, however, the insertion of nanometer-scale graphene quantum dots (GQDs) is demonstrated as whole units into h-BN sheets to form h-CBN. The h-CBN is prepared by using GQDs as seed nucleations for the epitaxial growth of h-BN along the edges of GQDs without the assistance of metal catalysts. The resulting h-CBN sheets possess a uniform distrubution of GQDs in plane and a high porosity macroscopically. The h-CBN tends to form in small triangular sheets which suggests an enhanced crystallinity compared to the h-BN synthesized under the same conditions without GQDs. An enhanced ferromagnetism in the h-CBN emerges due to the spin polarization and charge asymmetry resulting from the high density of CN and CB bonds at the boundary between the GQDs and the h-BN domains. The saturation magnetic moment of h-CBN reaches 0.033 emu g-1 at 300 K, which is three times that of as-prepared single carbon-doped h-BN
Beschreibung:	Date Completed 19.03.2019 Date Revised 01.10.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.201805778