Chemical stability - Revision history

Apm: /* Related */

2021-07-25T09:48:09Z

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	== Related ==		== Related ==

			[[The three stabilities]]:
			* [[Chemical stability]] (this page here)
	* [[Thermal stability]]		* [[Thermal stability]]
	* [[Mechanical stability]]		* [[Mechanical stability]]

Apm: /* Related / added Thermal stability * Mechanical stability

2021-07-01T13:32:04Z

Related: added * Thermal stability * Mechanical stability

← Older revision		Revision as of 15:32, 1 July 2021
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	== Related ==		== Related ==

			* [[Thermal stability]]
			* [[Mechanical stability]]
			----
	* [[Pure metals and metal alloys]]		* [[Pure metals and metal alloys]]
	* [[Skin]] – (potentially misleading bio-analogy) – [[Gem-gum housing shell]]		* [[Skin]] – (potentially misleading bio-analogy) – [[Gem-gum housing shell]]
	* '''[[Nanoscale surface passivation]]'''		* '''[[Nanoscale surface passivation]]'''
	* [[Macroscale surface passivation]]		* [[Macroscale surface passivation]]

Apm: /* Related */ bold

2021-06-28T20:19:57Z

Related: bold

← Older revision		Revision as of 22:19, 28 June 2021
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	* [[Pure metals and metal alloys]]		* [[Pure metals and metal alloys]]
	* [[Skin]] – (potentially misleading bio-analogy) – [[Gem-gum housing shell]]		* [[Skin]] – (potentially misleading bio-analogy) – [[Gem-gum housing shell]]
	* [[Nanoscale surface passivation]]		* '''[[Nanoscale surface passivation]]'''
	* [[Macroscale surface passivation]]		* [[Macroscale surface passivation]]

Apm: added authors to images

2021-06-13T14:14:58Z

added authors to images

← Older revision		Revision as of 16:14, 13 June 2021
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	[[File:Universal-joint sideview hyrogen-passivated.gif\|400px\|thumb\|right\|'''Hydrogen passivations''' (like the one shown here on an flexing universal joint mechanism) '''are highly chemically stable'''. They may well work in a clean air filled environment.]]		[[File:Universal-joint sideview hyrogen-passivated.gif\|400px\|thumb\|right\|'''Hydrogen passivations''' (like the one shown here on an flexing universal joint mechanism – designed by K. E. Drexler and R. C. Merkle) '''are highly chemically stable'''. They may well work in a clean air filled environment.]]
	[[File:Universal-joint sideview nitroxy-passivated.jpg\|400px\|thumb\|right\|'''Nitroxy passivations''' (like the one shown here on an flexing universal joint mechanism) '''are mechanically and thermally stable'''. Due to the different bond lengths than the underlying carbon they introduce stresses though. '''The effect of bond-length-difference stresses on chemical stability is to analyze.''']]		[[File:Universal-joint sideview nitroxy-passivated.jpg\|400px\|thumb\|right\|'''Nitroxy passivations''' (like the one shown here on an flexing universal joint mechanism) '''are mechanically and thermally stable'''. Due to the different bond lengths than the underlying carbon they introduce stresses though. '''The effect of bond-length-difference stresses on chemical stability is to analyze.''']]

Apm: /* Halogen passivated surfaces (Halogenated surfaces) */ added links to elements

2021-06-11T20:19:54Z

Halogen passivated surfaces (Halogenated surfaces): added links to elements

← Older revision		Revision as of 22:19, 11 June 2021
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	So let's count hydrogen passivated surfaces to the halogenated surfaces here.		So let's count hydrogen passivated surfaces to the halogenated surfaces here.

	The next halogen is [[Fluorine]].		The next halogen after [[hydrogen]] is fluorine.
	Fluorated diamond surfaces are known to ~~haxe~~ extremely high chemical stability.
	Chlorinated diamond surfaces are also still quite stable.		* [[Fluorine]] F: Fluorated diamond surfaces are known to have extremely high chemical stability.
	With heavier halogens (bromine Br, iodine I) surface stability drops.		* [[Chlorine]] Cl: Chlorinated diamond surfaces are also still quite stable.
	(Also they are much more rare and thus also much less interesting for structural purposes.)		* With heavier halogens ([[bromine]] Br, [[iodine]] I) surface stability drops. <br>(Also they are much more rare and thus also much less interesting for structural purposes.)

	Forget astatine, it's waay too radioactive.		Forget astatine, it's waay too radioactive.

Apm: /* Chalkogen and pnictogen passivated surfaces */ added links to elements

2021-06-11T20:17:18Z

Chalkogen and pnictogen passivated surfaces: added links to elements

← Older revision		Revision as of 22:17, 11 June 2021
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	E.g. Switching between		E.g. Switching between
	* oxygen sulfur selenium (tellurium maybe too metallic) (polonium too radioactive)		* [[oxygen]] [[sulfur]] [[selenium]] (tellurium maybe too metallic) (polonium too radioactive)
	* nitrogen phosphorus arsenic (antimony maybe too metallic) (bismuth too metallic)		* [[nitrogen]] [[phosphorus]] [[arsenic]] (antimony maybe too metallic) (bismuth too metallic)

	Also hydrogen passivated surfaces can be re-designed for e.g. a nitroxic surface passivation.		Also hydrogen passivated surfaces can be re-designed for e.g. a nitroxic surface passivation.

Apm: /* Chalkogen and pnictogen parrivated surfaces */ parrivated => passivated

2021-06-11T20:13:49Z

Chalkogen and pnictogen parrivated surfaces: parrivated => passivated

← Older revision		Revision as of 22:13, 11 June 2021
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	or drops in chemical stability due to too much strained bonds.		or drops in chemical stability due to too much strained bonds.

	== Chalkogen and pnictogen ~~parrivated~~ surfaces ==		== Chalkogen and pnictogen passivated surfaces ==

	Swapping atoms out with others that have the same bond order but a different period		Swapping atoms out with others that have the same bond order but a different period

Apm: /* Chalkogen and pnictogen parrivated surfaces */ added hint on illustrations

2021-06-11T20:13:21Z

Chalkogen and pnictogen parrivated surfaces: added hint on illustrations

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	Also hydrogen passivated surfaces can be re-designed for e.g. a nitroxic surface passivation.		Also hydrogen passivated surfaces can be re-designed for e.g. a nitroxic surface passivation.
	In fact the software [[nanoengineer-1]] had that implemented in an automated way.		In fact the software [[nanoengineer-1]] had that implemented in an automated way.
			See the two similar illustrating images, once hydrogen passivated, once nitroxy passivated.
	Surface stresses my be significant though.		Surface stresses my be significant though.
	{{todo\|Analyze effect of surface stresses in nitroxic passivation on chemical stability}}.		{{todo\|Analyze effect of surface stresses in nitroxic passivation on chemical stability}}.
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	A nitroxy passivation might have the advantage though that the air is also mostly nitrogen and oxygen.		A nitroxy passivation might have the advantage though that the air is also mostly nitrogen and oxygen.
	Water might act aggressive on these strained bonds though. More analysis needed.		Water might act aggressive on these strained bonds though. More analysis needed.

	== Related ==		== Related ==

Apm: intro improvement

2021-06-11T20:09:15Z

intro improvement

← Older revision		Revision as of 22:09, 11 June 2021
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	This is easily solved by:		This is easily solved by:
	* (1) The choice of the right material for the right location.		* (1) The choice of the right material for the right location.
	* (2) Isolation of as much of the inner nanomachinery from the outer environment. (For systems that allow so.)		* (2) Isolation of as much of the inner nanomachinery from the outer environment. <br><small>(For systems that allow so. Filters e.g. necessarily have lots of exposed surface.)</small>

	== Choice of the right material for the right location ==		== Choice of the right material for the right location ==

Apm: removed stub marker

2021-06-11T20:06:51Z

removed stub marker

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	~~{{stub}}~~

	[[File:Universal-joint sideview hyrogen-passivated.gif\|400px\|thumb\|right\|'''Hydrogen passivations''' (like the one shown here on an flexing universal joint mechanism) '''are highly chemically stable'''. They may well work in a clean air filled environment.]]		[[File:Universal-joint sideview hyrogen-passivated.gif\|400px\|thumb\|right\|'''Hydrogen passivations''' (like the one shown here on an flexing universal joint mechanism) '''are highly chemically stable'''. They may well work in a clean air filled environment.]]
	[[File:Universal-joint sideview nitroxy-passivated.jpg\|400px\|thumb\|right\|'''Nitroxy passivations''' (like the one shown here on an flexing universal joint mechanism) '''are mechanically and thermally stable'''. Due to the different bond lengths than the underlying carbon they introduce stresses though. '''The effect of bond-length-difference stresses on chemical stability is to analyze.''']]		[[File:Universal-joint sideview nitroxy-passivated.jpg\|400px\|thumb\|right\|'''Nitroxy passivations''' (like the one shown here on an flexing universal joint mechanism) '''are mechanically and thermally stable'''. Due to the different bond lengths than the underlying carbon they introduce stresses though. '''The effect of bond-length-difference stresses on chemical stability is to analyze.''']]