Max Planck Institute for Polymer Research , Ackermannweg 10, D-55128 Mainz, Germany.
Institute of Physics, Johannes Gutenberg-University Mainz , Staudingerweg 7, D-55128 Mainz, Germany.
J Am Chem Soc. 2017 Jul 19;139(28):9483-9486. doi: 10.1021/jacs.7b05055. Epub 2017 Jul 6.
Bottom-up synthesis of low-bandgap graphene nanoribbons with various widths is of great importance for their applications in electronic and optoelectronic devices. Here we demonstrate a synthesis of N = 5 armchair graphene nanoribbons (5-AGNRs) and their lateral fusion into wider AGNRs, by a chemical vapor deposition method. The efficient formation of 10- and 15-AGNRs is revealed by a combination of different spectroscopic methods, including Raman and UV-vis-near-infrared spectroscopy as well as by scanning tunneling microscopy. The degree of fusion and thus the optical and electronic properties of the resulting GNRs can be controlled by the annealing temperature, providing GNR films with optical absorptions up to ∼2250 nm.
具有各种宽度的低带隙石墨烯纳米带的自下而上合成对于它们在电子和光电子器件中的应用非常重要。在这里，我们通过化学气相沉积方法展示了 N = 5 扶手椅石墨烯纳米带（5-AGNRs）及其侧向融合为更宽的 AGNRs 的合成。通过不同光谱方法的组合，包括拉曼和紫外可见近红外光谱以及扫描隧道显微镜，揭示了 10-和 15-AGNRs 的高效形成。通过退火温度可以控制融合的程度，从而控制所得 GNR 的光学和电子性质，提供了光学吸收率高达约 2250nm 的 GNR 薄膜。
