Park Gle, Lee Kyung G, Lee Seok Jae, Park Tae Jung, Wi Rinbok, Kim Do Hyun
Department of Chemical and Biomolecular Engineering (BK21 Program), Korea Advanced Institute of Science and Technology, 335 Gwahak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
J Nanosci Nanotechnol. 2011 Jul;11(7):6095-101. doi: 10.1166/jnn.2011.4446.
A Reduced reduced graphene oxide (RGO)-gold (Au) nanoparticle (NP) nanocomposite was synthesized by simultaneously reducing the Au ions and depositing Au NPs on onto the surface surface of the RGOsRGO simultaneously. To facilitate the reduction of Au ions and the generation of oxygen functionalities for anchoring the Au NPs on the RGOsRGO, ultrasound irradiation was applied to the mixture of reactants. The functional groups were investigated with FT-IR spectra. From the Raman and XPS spectra, the oxygen groups were identified as hydroxyl, epoxy, and carboxyl groups, the same as the one from graphene oxide (GO). As a result, the dense and uniform deposition of nanometer-sized Au NPs with nanometer size was observed on the RGO sheets sheet was observed with from the TEM imagesimage. The Oxygen oxygen functional groups that formed on the surface surface of the RGOs RGO seemed to have served serve as links for Au NPs NP attachment, through the electrostatic attraction of Au ions. Hybrid materials could thus be produced in a short time, with a high yield, by via ultrasound application. Besides, it ultrasound application could can readily take goldAu- binding- peptide (GBP)-modified biomolecules, readily implying its possibility in possible biological applications.
通过同时还原金离子并将金纳米颗粒沉积在还原氧化石墨烯（RGO）表面，合成了一种还原氧化石墨烯-金（Au）纳米颗粒纳米复合材料。为了促进金离子的还原以及生成用于将金纳米颗粒锚定在RGO上的氧官能团，对反应物混合物施加了超声辐射。用傅里叶变换红外光谱（FT-IR）研究了官能团。从拉曼光谱和X射线光电子能谱（XPS）可知，氧基团被鉴定为羟基、环氧基和羧基，与氧化石墨烯（GO）的相同。结果，从透射电子显微镜（TEM）图像中观察到在RGO片材上有致密且均匀的纳米尺寸金纳米颗粒沉积。在RGO表面形成的氧官能团似乎通过金离子的静电吸引作用作为金纳米颗粒附着的连接点。因此，通过超声应用可以在短时间内高产率地制备杂化材料。此外，超声应用可以很容易地结合金结合肽（GBP）修饰的生物分子，这意味着它在生物应用方面具有可能性。
