Russier-Antoine Isabelle, Fakhouri Hussein, Basu Srestha, Bertorelle Franck, Dugourd Philippe, Brevet Pierre-François, Velayudhan Prajitha, Thomas Sabu, Kalarikkal Nandakumar, Antoine Rodolphe
Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, F-69100 Villeurbanne, France.
Chem Commun (Camb). 2020 Apr 7;56(27):3859-3862. doi: 10.1039/d0cc00111b. Epub 2020 Mar 5.
In this communication, we report the second harmonic scattering from mass characterized 2D graphene oxide sheets dispersed in an aqueous suspension, in the femtosecond regime at 800 nm laser excitation. Charge-detection mass-spectrometry, performing at the single sheet level, allows for an exhaustive molar mass distribution and thus concentration for these 2D nanomaterials samples. The orientation-averaged hyperpolarizability value is (1.36 ± 0.15) × 10 esu as determined by the concentration-dependent harmonic scattering signal. In addition, the multi-photon excited fluorescence spectrum is characterized by a broad band in the visible range between 350 and 700 nm centered at about 500 nm.
在本通讯中，我们报道了在800 nm激光激发的飞秒 regime下，分散在水悬浮液中的质量表征二维氧化石墨烯片的二次谐波散射。在单张水平上进行的电荷检测质谱分析，能够获得这些二维纳米材料样品详尽的摩尔质量分布及浓度。由浓度依赖性谐波散射信号确定的取向平均超极化率值为(1.36 ± 0.15) × 10 esu。此外，多光子激发荧光光谱的特征是在350至700 nm的可见光范围内有一个以约500 nm为中心的宽带。
