Comparison of mechanical character of different bonds types

From apm
Jump to: navigation, search
This article is a stub. It needs to be expanded.

Motivations

Reliable bond breaking results are essential in systems operating mostly blindly open loop control.
To design systems that feature such reliable bond breaking bonds of different types and different areas need to be compared.

One desires reliable Van der Waals gripping.
Van der Waals gripping is e.g. usable when transferring adapter palettes from one attachment chain to another.
This needs comparison of just bonds of different areas.

One desired reliable Piezomechanosynthesis.
This needs comparison of just bonds of different types and areas.

Questions

For different areas of bonds:
What are the absolute differences and relative ratios to ensure a
known outcome in bond breaking processes to very high reliability (i.e. to preserve machine phase)?

For different kinds of bonds:
What are the areas of equivalent:
binding energy, maximal force, and maximal bond stiffness?
These can and will all be different! (See: Energy, force, and stiffness.)
And how do the corresponding strain distances relate?

Area difference/ratio & tug-of-war bond-break-location predictability

This is mostly about non-bonding bonds.
Meaning non covalently but VdW bonding surface contacts.
Like found in nanoscale passivation.

Given two bonds are put mechanically into series in kind of a tug-of-war situation: (wiki-TODO: Add a trivial sketch)

If they have the exact bond area and energy-per-bond-area then pulling apart each bond has 50% likelihood to be the one to break.
A mix of thermal motions and quantum randomness (mostly the former at room temperature) are the highly unpredictable deciding factor.

If they have different area then how much difference (in absolute and relative terms) is needed to get a highly reliably predictable result to the question which bond is going to break.

Different kinds of bonds: Equivalent areas

How much area of densely-hydrogen-terminated-dense-diamond to densely-hydrogen-terminated-dense-diamond Van-der-Waals-bond is needed
to match the peak binding force of a single covalent C-C bond.

(wiki-TODO: Do some simple math and add quick lookup tables)

TODO VdW bond:

  • Same energy as CC-bond: ___ CC-bond areas
  • Same peak force CC-bond : ___ CC-bond areas
  • Same peak stiffness as CC-bond: ___ CC-bond areas

(Diamond 111 CC-bond)

Related

Retrieved from "http://apm.bplaced.net/w/index.php?title=Comparison_of_mechanical_character_of_different_bonds_types&oldid=13763"