Nanotechnology - IAP/TU Wien

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Electric arc method – increase SWNT yield • A significant increase (up to +230%) in the SWNT yield is obtained, if graphite powder (sp 2 hybridized carbon) is replaced by diamond powder (sp 3 hybridized carbon) • This strongly points toward the fact that physical phenomena (charge and heat transfers) that occurr in the anode during the arc are of utmost importance.
Electric arc method – increase SWNT yield • Utilizing a rare earth element (such as Y) associating eith a transition metal (such as Ni) leads to the highest SWNT yields. • Utilizing a single rare earth element leads to telescopelike and open c-MWNTs able to contain nested Gd crystals.
Page 1 and 2: Nanotechnology 4 th lecture (c) htt
Page 3 and 4: Nanotechnology 4 th lecture Please
Page 5 and 6: Structure of carbon nanotubes
Page 7 and 8: Single-Wall Nanotubes Roll a perfec
Page 9 and 10: Consequences from structure 1. All
Page 11 and 12: SWNT structures Zig-zag type Armcha
Page 13 and 14: (n,m) SWNTs • The C-C bond length
Page 15 and 16: Gathering of SWNTs • Similar reas
Page 17 and 18: Multiwall nanotubes: MWNTs • The
Page 19 and 20: Herringbone MWNT • In h-MWNTs the
Page 21 and 22: Bamboo texture • A limited amount
Page 23 and 24: Properties of MWNTs (1/2) • Aspec
Page 25 and 26: 3.2. Synthesis of Carbon Nanotubes
Page 27 and 28: Solid Carbon Source-Based Productio
Page 29 and 30: Laser ablation - experimental devic
Page 31 and 32: Laser ablation - Results • In the
Page 33 and 34: Laser ablation - Summary • The la
Page 35 and 36: Electric arc method - experimental
Page 40 and 41: Electric arc method - Summary • T
Page 42 and 43: Solar furnace - Experimental device
Page 44 and 45: • The laser ablation, the electri
Page 46 and 47: Gaseous carbon based production tec
Page 48 and 49: Templating technique
Page 50 and 51: Synthesis of aligned carbon nanotub
Page 52 and 53: 3.3. Growth mechanisms of carbon na
Page 54 and 55: 3.3.2. Catalytically activated grow
Page 56 and 57: Low temperature conditions The part
Page 58 and 59: High temperature conditions • Ele
Page 60 and 61: MWNT properties • In stacked grap
Page 62 and 63: SWNT adhesion properties • SWNTs
Page 64: SWNT mechanical properties • The

Nanotechnology - IAP/TU Wien

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