Synthesis of alpha-alumina nanoribbons: characterization and their morphological evolution

Phase dependent thermal and spectroscopic responses of Al2O3nanostructures with different morphogenesis

“…Inset (in p) elucidates the lattice scale fringes of the corresponding nanoparticles. 68,71,83,157,224,226,251,[336][337][338][339][340][341][342] 6 for α-Al 2 O 3 ) elucidates that with increasing the concentration the %TC enhancement is more likely to follow a linear relationship with temperature. The rest of the crystalline phases have less TC compared to very less, which is discussed in Fig.…”

“…Fig.16α-Al 2 O 3 nanostructures: TEM images of (a) nanowires, (b) nanotubes, (c) nanorods, (d) nanowires, SEM micrographs of (e) nanoneedles, (f) nanoplatelets, (g) nanowires, (h) nanotrees, FESEM images of (i) nanowires, ( j) nanobelts, TEM image of individual nanobelt (k) and (l), SEM image of (m) nanoribbons, (n) nanoparticles, HeIM image of nanoparticles, TEM micrograph of (p) nanoparticles and (q) high-resolution TEM image of nanoparticles. Inset (in p) elucidates the lattice scale fringes of the corresponding nanoparticles 68,71,83,157,224,226,251,[336][337][338][339][340][341][342]. Fig.…”

Unique structure and surface-related elastic modulus of alumina nanobelts

“…One-dimensional (1D) Al 2 O 3 materials in the form of whiskers, nanowires and nanobelts have excellent mechanical, thermal and optical properties, and thus have been widely used as reinforcing agents, optic fibers and nanoscale sensors [1][2][3][4][5][6]. 1D Al 2 O 3 materials could be fabricated in a large quantity by chemical vapor deposition (CVD) based on vapor-liquid-solid [7][8][9] or vapor-solid mechanisms [10][11][12][13][14][15][16][17][18][19][20], the melt-based method [21] and electrospinning techniques [22]. Usually, Al 2 O 3 nanowires and nanobelts with a nearly defect-free structure can only be synthesized by CVD at high temperatures, but exhibit superior mechanical and optical properties as compared to Al 2 O 3 micron-scale whiskers and bulk single crystals [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

“…1D Al 2 O 3 materials could be fabricated in a large quantity by chemical vapor deposition (CVD) based on vapor-liquid-solid [7][8][9] or vapor-solid mechanisms [10][11][12][13][14][15][16][17][18][19][20], the melt-based method [21] and electrospinning techniques [22]. Usually, Al 2 O 3 nanowires and nanobelts with a nearly defect-free structure can only be synthesized by CVD at high temperatures, but exhibit superior mechanical and optical properties as compared to Al 2 O 3 micron-scale whiskers and bulk single crystals [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Depending on the fabrication conditions, the CVD-grown α-Al 2 O 3 nanowires and nanobelts exhibit various sizes, morphologies and structures, such as [0001]-oriented nanowires with hexagonal cross sections [10][11][12][13][14][15], [0001]-oriented nanobelts enclosed by  1010 ( ¯) planes at the upper/lower surfaces [15][16]...…”