School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
Nanoscale. 2011 Nov;3(11):4720-3. doi: 10.1039/c1nr10655d. Epub 2011 Oct 10.
Organic nanowires of 9,10-dibromoanthracene (DBA) and 9,10-dicyanoanthracene (DCNA) were obtained by adding the THF solution of DBA/DCNA into water containing P123 surfactants. The as-prepared nanowires were characterized by UV-vis, fluorescence spectra, Field Emission Scanning Electron Microscopy (FESEM), and Transmission Electron Microscopy (TEM). We found that DBA and DCNA nanowires emitted green light rather than blue light for molecules in THF solution. The red-shift UV and fluorescent spectra of DBA and DCNA nanowires implied that these nanowires were formed through J-aggregation. The photoconducting study of DBA/DCNA nanowire-based network on rGO/SiO(2)/Si shows different photocurrent behaviors upon irradiation, which displayed that electron transfer from DCNA nanowire to rGO was stronger than that of DBA nanowires to rGO.
将 DBA/DCNA 的 THF 溶液加入含有 P123 表面活性剂的水中，可得到 9,10-二溴蒽（DBA）和 9,10-二氰基蒽（DCNA）的有机纳维管。通过紫外可见光谱、荧光光谱、场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）对所制备的纳维管进行了表征。我们发现 DBA 和 DCNA 纳维管发出的绿光而不是 THF 溶液中分子的蓝光。DBA 和 DCNA 纳维管的紫外和荧光光谱红移表明这些纳维管是通过 J-聚集形成的。在 rGO/SiO(2)/Si 上基于 DBA/DCNA 纳维管网络的光电导研究表明，在照射下表现出不同的光电流行为，这表明 DCNA 纳维管中的电子从 DCNA 纳维管向 rGO 的转移比 DBA 纳维管向 rGO 的转移要强。
