07-05-2012, 11:28 AM
CARBON NANOTUBES
[attachment=21442]
WHAT ARE CNT’S ?
they are formed by rolling graphene sheets to form tube
WHAT ARE CNT’S ?
this is a nanoscopic structure made of carbon(c60) atoms in the shape of a hollow cylinder. the cylinders are typically closed at their ends by semi-fullerene-like structures
fullerene is molecule entirely consist of carbon in various geometric shapes
WHY TO USE CNT’S ?
young’s modulus 950 gpa
tensile strength 63 gpa
able to withstand repeated bending,
twisting
excellent thermal conduction
high permittivity
cnt’s exhibit conductivity more than copper
thermal conductivity as high as diamond
100 times more strength than steel
weight is 1/6th of steel
graphene is most thermodynamically stable
MULTIWALLED CNT’S
multi walled cnt’s in this the one
cnt is covered
with multiple
cnt’s like
coaxial cylinders
[attachment=21442]
WHAT ARE CNT’S ?
they are formed by rolling graphene sheets to form tube
WHAT ARE CNT’S ?
this is a nanoscopic structure made of carbon(c60) atoms in the shape of a hollow cylinder. the cylinders are typically closed at their ends by semi-fullerene-like structures
fullerene is molecule entirely consist of carbon in various geometric shapes
WHY TO USE CNT’S ?
young’s modulus 950 gpa
tensile strength 63 gpa
able to withstand repeated bending,
twisting
excellent thermal conduction
high permittivity
cnt’s exhibit conductivity more than copper
thermal conductivity as high as diamond
100 times more strength than steel
weight is 1/6th of steel
graphene is most thermodynamically stable
MULTIWALLED CNT’S
multi walled cnt’s in this the one
cnt is covered
with multiple
cnt’s like
coaxial cylinders