The XRD spectra of the Ag2Te products under various growth times (3, 6, and 12 h reaction time) are shown in Additional file 1: Figure A1. Figure 1 Morphology evolution sequence of Ag 2 Te products as different reaction durations. The SEM images of the as-prepared Ag2Te products under different reaction times at 160°C: (a) 0, (b) 3, and (c) 6 h. (d) EDS of the Ag2Te nanobelts. The morphology and structure
of the Ag2Te nanotubes were examined with SEM and TEM. The SEM image (Figure 2a) of the Ag2Te nanotubes shows learn more that the product obviously presents tubular structures which have been rolled into tubes or half-pipes. As can be seen from the image, the nanotubes have lengths of several microns and outer diameters of 100 to 230 nm. Figure 2b is a TEM image of a single Ag2Te nanotube. The TEM image further provides that the product is tubular with an approximately 80 nm of tube wall in thickness. In addition, we can obviously see that the outer diameter of the tube is approximately 200 nm. The high-quality crystal structure of Ag2Te nanotubes is demonstrated in a HRTEM image shown in Figure 2c, where
abruptness at an atomic level can be confirmed and no defects are observed. The lattice spacing between the atomic planes was determined to be 0.56 nm in accordance with the distance between layers, indexed to the monoclinic Ag2Te phase. Correspondingly, the fast Fourier transform (FFT) pattern (inset in Figure 2c) shows obvious single crystalline MRT67307 nature and can be easily indexed to the cubic structure. The corresponding SAED pattern in Figure 2d can be indexed to the crystal of Ag2Te, which further provides strong evidence for confirming ADP ribosylation factor single crystalline growth in the fine
monoclinic crystal structure. Figure 2 The morphology and structure of the Ag 2 Te nanotubes. (a) The high magnification SEM image of the as-prepared Ag2Te nanotubes. (b) TEM image of the single Ag2Te nanotube. (c) HRTEM image recorded from the black square in (b) and FFT image (inset). (d) SAED patterns of the single Ag2Te nanotube. The morphology and structure of the Ag2Te nanowires were examined with SEM in Figure 3a. Numerous long straight nanowires are formed, and all of the nanowires are demonstrated with the relatively uniform diameter about 200 nm and a typical length of tens of micrometers. A detailed investigation was performed using high-magnification SEM (HRSEM)/HRTEM/TEM. Figure 3b shows a typical high-magnification SEM image of the single Ag2Te nanowire with diameters about 150 nm and lengths ranging from 8 to 10 μm. A typical HRTEM image (Figure 3c) taken from a small square in Figure 3b demonstrates clear lattice fringes with an interplanar spacing of 0.65 nm. Moreover, a representative SAED (upper right inset in Figure 3c, taken from a small square in Figure 3b, too) further substantiates that the Ag2Te nanowire has a single crystalline structure with a monoclinic phase.