Types of carbon nanotubes: Single-walled The(n, m) nanotube naming scheme can be thought of as a vector(Ch) in an infinite graphene sheet that describes how to"roll up"the graphene sheet to (n, O)zigzag make the nanotube T denotes the tube axis, and a and a Che nai t ma are the unit vectors of graphene in real space. (nm)armchair
Types of carbon nanotubes: Single-walled The (n,m) nanotube naming scheme can be thought of as a vector (Ch ) in an infinite graphene sheet that describes how to "roll up" the graphene sheet to make the nanotube. T denotes the tube axis, and a1 and a2 are the unit vectors of graphene in real space
For a given(n, m) nanotube, if 2n m=3q ZIGZAG (where q is an integer), then the nanotube is metallic, otherwise the nanotube is a semiconductor. Thus all arm chair (n=m) nanotubes are metallic and nanotubes (5,0),(6, 4), CHIRAL(, 1),etcare semiconducting. In theory, metallic nanotubes can have an electrical current density s more than 1,000 times greater than metals such ARMCHAIR as silver and copper
For a given (n,m) nanotube, if 2n + m=3q (where q is an integer), then the nanotube is metallic, otherwise the nanotube is a semiconductor. Thus all armchair (n=m) nanotubes are metallic, and nanotubes (5,0), (6,4), (9,1), etc. are semiconducting. In theory, metallic nanotubes can have an electrical current density more than 1,000 times greater than metals such as silver and copper
(n,m) armchair 010 nanotube38888 [7, 10)nanotube (10, 10) nanotube armchair)
、 Compounds 1.[-4]o.S 水解性(或与水反应 Al4C3+ 12H2O=4Al(OH)3+ 3CH4N CaC?+ 2H20= Ca(OH)2+ HCCH 2.[+4]0s (cHAla a制备cS2+3cl2=ccl4+S2Cl2 b.性质水解性
三、Compounds 1. [ - 4 ] O.S. 水解性(或与水反应) Al4C3 + 12H2O = 4Al(OH)3 + 3CH4↑ CaC2 + 2H2O = Ca(OH)2 + HCCH 2. [ + 4 ] O.S (1) CHal4 a. 制备 CS2 + 3Cl2 = CCl4 + S2Cl2 b. 性质 水解性