Engineering Laboratory for Modern Analytical Techniques, Changchun Institute of Applied Chemistry, and Graduate University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, PR China.
Langmuir. 2010 Jul 20;26(14):12314-20. doi: 10.1021/la101534n.
A widely soluble graphene sheet/Congo red (GSCR) composite was synthesized and applied to prepare GSCR/Au hybrid materials. UV-vis absorption, Fourier transform infrared, Raman, and X-ray photoelectron spectra revealed that Congo red (CR) is successfully coupled on graphene sheets. The morphology of GSCR was studied by transmission electron microscopy, scanning electron microscopy, and atomic force microscopy. The dispersion behavior of the GSCR composite was also studied in 18 different solvents, and the digital images indicate that it is soluble both in water and in a variety of organic solvents. The GSCR nanosheets are still single layers or bilayers in water and individual from one to another after 100 days of storage. Furthermore, the mechanism of GSCR's good solubility was successfully explained by the Hansen solubility parameters. The four standard probe result shows that the GSCR films have a bulk conductivity of approximately 6850 S m(-1). The wide solubility and long lifetime of GSCR solutions are absolutely necessary for further treatment. As an example, Au nanoparticles densely decorated CR-functionalized graphene sheets through electrostatic interaction.
一种具有广泛溶解性的石墨烯片/刚果红（GSCR）复合材料被合成，并用于制备 GSCR/Au 杂化材料。紫外可见吸收、傅里叶变换红外、拉曼和 X 射线光电子能谱表明刚果红（CR）成功地偶联到石墨烯片上。通过透射电子显微镜、扫描电子显微镜和原子力显微镜研究了 GSCR 的形态。还研究了 GSCR 复合材料在 18 种不同溶剂中的分散行为，数码图像表明它既溶于水又溶于多种有机溶剂。GSCR 纳米片在水中仍然是单层或双层的，并且在储存 100 天后仍然彼此独立。此外，通过 Hansen 溶解度参数成功地解释了 GSCR 良好溶解性的机理。四个标准探针的结果表明，GSCR 薄膜的体电导率约为 6850 S m(-1)。GSCR 溶液的宽溶解性和长寿命对于进一步处理是绝对必要的。例如，通过静电相互作用，金纳米颗粒密集地修饰了 CR 功能化的石墨烯片。
