Cid Antonio, Moldes Óscar A, Diniz Mário S, Rodríguez-González Benito, Mejuto Juan C
UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnología, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
Departamento de Química-Física, Facultade de Ciencias de Ourense, Universidade de Vigo, Campus de As Lagoas S/N, 32004 Ourense, Spain.
ACS Omega. 2017 May 26;2(5):2368-2373. doi: 10.1021/acsomega.7b00049. eCollection 2017 May 31.
This work aims at assessing the influence of two different solvents, bidistilled water and toluene, on dispersions of carbon-based engineered nanomaterials, namely, fullerenes, and their self-assembly behavior. The obtained self-assembled carbon-based materials were characterized using UV-vis spectrophotometry and transmission electron microscopy techniques. The results obtained were unexpected when toluene was used for dispersing fullerene C, with the formation of two different types of self-assembled structures: fullerene C nanowhiskers (FNWs) and a type of quasispherical nanostructure. The FNWs ranged between 1 and 6 μm in length, whereas the quasispherical fullerene C nanoaggregates ranged between 10 and 50 nm in diameter. Aggregates obtained in toluene showed a well-formed crystal structure. When using water, the obtained aggregates were amorphous and showed a no well-defined shape. Their sizes ranged between 20 and 40 nm for nanosized structures and between 0.4 and 4.8 μm for micron-sized self-aggregates.
这项工作旨在评估两种不同溶剂（重蒸馏水和甲苯）对碳基工程纳米材料（即富勒烯）分散体及其自组装行为的影响。使用紫外可见分光光度法和透射电子显微镜技术对所得的自组装碳基材料进行了表征。当使用甲苯分散富勒烯C时，所得结果出乎意料，形成了两种不同类型的自组装结构：富勒烯C纳米晶须（FNW）和一种准球形纳米结构。FNW的长度在1至6μm之间，而准球形富勒烯C纳米聚集体的直径在10至50nm之间。在甲苯中获得的聚集体显示出良好形成的晶体结构。当使用水时，所得聚集体是无定形的，且形状不明确。对于纳米级结构，其尺寸在20至40nm之间，对于微米级自聚集体，其尺寸在0.4至4.8μm之间。
