Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry, Beijing Institute of Technology, Beijing, People's Republic of China.
Nanotechnology. 2012 Jun 29;23(25):255605. doi: 10.1088/0957-4484/23/25/255605. Epub 2012 May 31.
Graphene-quantum-dot microspheres (GQDSs) have been prepared by assembly of graphene quantum dots (GQDs) via a water-in-oil (W/O) emulsion technique without the addition of any surfactants. Although made of quantum-sized graphene dots, the as-formed GQDSs are solid and remain intact after slight ultrasonication. The versatile W/O emulsion method allows the in situ intercalation of functional nanocomponents into the GQDSs for specific applications. As exemplified by the Fe(3)O(4)-containing GQDSs, Fe(3)O(4)-GQDSs exhibit a large magnetic response. Furthermore, the embedded Fe(3)O(4) nanoparticles in GQDSs can act as the catalysts for the growth of carbon nanotubes (CNTs), which opens the opportunities for fabricating new complex structures of CNTs surrounding GQDSs by simple chemical vapor deposition.
石墨烯量子点微球（GQDSs）是通过油包水（W/O）乳液技术将石墨烯量子点（GQDs）组装而成的，无需添加任何表面活性剂。尽管由量子尺寸的石墨烯点组成，但形成的 GQDSs 是固体的，经过轻微超声处理后仍保持完整。多功能的 W/O 乳液方法允许将功能纳米复合材料原位嵌入 GQDSs 中，以用于特定应用。以含有 Fe(3)O(4)的 GQDSs 为例，Fe(3)O(4)-GQDSs 表现出较大的磁响应。此外，嵌入 GQDSs 中的 Fe(3)O(4)纳米颗粒可以作为碳纳米管（CNTs）生长的催化剂，这为通过简单的化学气相沉积在 GQDSs 周围制造新的 CNTs 复杂结构开辟了机会。
