high-resolution tem (hrtem) images and select-area electron diffraction (saed) patterns  (Thermo Fisher)

Journal: Science Advances

Article Title: Carbyne with finite length: The one-dimensional sp carbon

doi: 10.1126/sciadv.1500857

Figure Lengend Snippet: ( A ) XRD pattern of the sample. The peaks are shaped and strong, showing the good crystallinity of carbyne. There is an obviously preferred orientation along the c axis. Inset: White carbyne powder coating on the glass substrate. Rectangular glass substrate with white crystal powder (left) compared with bare glass (right). ( B ) SEM image of carbyne crystals. They are in the shape of flakes stacked together. EDS showing that the sample contains C, O, and Au. O and Au originate from the surface adsorption of oxygen molecules and gold nanocrystals. ( C ) TEM image of carbyne crystals. Carbyne exhibits a rod shape (10 to 30 nm in width and 50 to >100 nm in length). The tiny spherical particles on the surface of nanorods are gold nanocrystals. ( D to I ) SAED patterns and HRTEM images are divided into three categories based on the direction of the incident electron beam ([1-20], [012], and [001], respectively). The former two are rectangular lattices, whereas the last one is a hexagonal lattice. Scale bars, 5 nm (E), 3 nm (G), and 3 nm (H). ( J ) EDS shows that the sample is almost completely composed of carbon and that the Cu signal originated from the Cu grid.

Article Snippet: TEM images, SAED patterns, and HRTEM images were obtained using a JEOL JEM-2010HR instrument (at an accelerating voltage of 200 kV), an FEI Tecnai G2 F30 transition electron microscope equipped with a field emission gun (at an accelerating voltage of 300 kV), and an EDX spectrometer.

Techniques: Adsorption