periodic table, bonding, nanoscale materials
DESCRIPTION
Periodic Table, Bonding, Nanoscale Materials. Heinemann Chemistry 1 Part 2, p 166. BONDING and PROPERTIES. Graphite Layered structure, 2-D carbon layers. Two types of bonding. Very soft and slippery (used as a lubricant or in pencils). Density: 2.266 g/cm 3 - PowerPoint PPT PresentationTRANSCRIPT
Periodic Table, Bonding, Nanoscale Materials
Heinemann Chemistry 1 Part 2, p 166
DiamondIt is a strong, rigid 3-D structure.
Single bonding type.
Hardest known material.
High strength and durability
Density: 3.514 g/cm3
Least compressible material.
Best known conductor of heat (thermal conductivity x5 Cu)
An insulator. Transparent.
Its electrical resistance, optical transmissivity and chemical inertness are remarkable.
Graphite
Layered structure, 2-D carbon layers.
Two types of bonding.
Very soft and slippery (used as a lubricant or in pencils).
Density: 2.266 g/cm3
Easily compressed normal to layering.
The planar structure of graphite allows electrons to move easily within the planes. This permits graphite to conduct electricity (used in batteries) and heat as well as absorb light and, unlike diamond, appear black in color.
BONDING and PROPERTIES
Nanomaterials –“bottom up” versus
“top down”
The quasi zero-, one-, and two-dimensional carbon structures
fullerenes carbon nanotubes graphene/graphite
exhibit interesting bonding properties.
The Graphene Sheet
Source: www.worldofteaching.com
The CARBON Group (Group 14 Elements)
Diamond Structures Carbon & Silicon
Source: www.worldofteaching.com
Quantum dots – size-dependent colour variation