5.3 Nanostructures Related to Compounds with Layered Structures 99
Figure 5.21 ZrSe 2 onion crystal, “a noncarbon multiwall fullerene.” [16]. (Reproduced with
permission by Elsevier.)
2 nm
Figure 5.22 MoS 2 multiwall fullerene particle. The nonspherical geometry is, with respect to
surface energy and stresses, difficult to understand. (Tenne, R., (2012) Weizmann Institute,
Israel; private communication.)
10 nm
The compounds MoS 2 and WS 2 are well known as solid-state lubricants.
Conventionally, especially MoS 2 powder is widely used as solid lubricant, because
the different layers bond by van der Waals forces glide easily on each other. Furthermore, these platelets act as distance holders between the two metal surfaces
and eliminate direct contact, this minimizes metal wear. This is of special importance in the case of extreme loads, where oils and greases, used as lubricants,
Figure 5.21 ZrSe 2 onion crystal, “a noncarbon multiwall fullerene.” [16]. (Reproduced with
permission by Elsevier.)
2 nm
Figure 5.22 MoS 2 multiwall fullerene particle. The nonspherical geometry is, with respect to
surface energy and stresses, difficult to understand. (Tenne, R., (2012) Weizmann Institute,
Israel; private communication.)
10 nm
The compounds MoS 2 and WS 2 are well known as solid-state lubricants.
Conventionally, especially MoS 2 powder is widely used as solid lubricant, because
the different layers bond by van der Waals forces glide easily on each other. Furthermore, these platelets act as distance holders between the two metal surfaces
and eliminate direct contact, this minimizes metal wear. This is of special importance in the case of extreme loads, where oils and greases, used as lubricants,