Timeline for What kind of interacion is there between a nanoparticle and its functionalizing coating?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| S Feb 12, 2015 at 20:09 | history | suggested | Sparkler | CC BY-SA 3.0 |
adding ref names
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| Feb 12, 2015 at 20:03 | vote | accept | Sparkler | ||
| Feb 12, 2015 at 20:00 | review | Suggested edits | |||
| S Feb 12, 2015 at 20:09 | |||||
| S Feb 12, 2015 at 19:55 | history | suggested | Sparkler | CC BY-SA 3.0 |
adding info from comments
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| Feb 12, 2015 at 19:54 | comment | added | Crystal Lettuce | Sorry, I just removed the "superatom model" part. I confused that with a different consideration. Therein, the AuL units are viewed as ligands to the central atom in $\ce{[M(AuPMe3)11(AuCl)][GaCl4]3}$ with (M = Ni, Pd, Pt). The twelve AuL "ligands" then form molecular orbitals which are reminiscent of atomic orbitals and thus can be described with the superatom model. (dx.doi.org/10.1002/anie.201310436) | |
| Feb 12, 2015 at 19:53 | review | Suggested edits | |||
| S Feb 12, 2015 at 19:55 | |||||
| Feb 12, 2015 at 19:48 | history | edited | Crystal Lettuce | CC BY-SA 3.0 |
I just removed the part with the superatom model. This is a different consideration.
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| Feb 12, 2015 at 19:45 | comment | added | Crystal Lettuce | In this case I meant 5 nm, 12 nm. I stated this because I am not aware of any case in which a 13-metal-atom cluster was analysed by TEM (Transmission Electron Microscopy). The conditions are simply too harsh, the ligand shell is ripped off and the little clusters experience a very strong tendency to agglomerate. You need specialised TEM equipment to acquire meaningful data. Nanoparticles of a few nanometers are less prone to show such a fast agglomeration. | |
| Feb 12, 2015 at 19:40 | comment | added | Sparkler | you said larger nanoparticles agglomerate less. by "larger" you mean larger than 13 metal atoms? | |
| Feb 12, 2015 at 19:34 | comment | added | Crystal Lettuce | In this case I mean a dative bond. chemguide.co.uk/atoms/bonding/dative.html It has covalent portions as well as ionic. It is, however, better understood if you think of coordination complexes. Only in this case, there is not only a single metal atom in the centre. | |
| Feb 12, 2015 at 19:30 | comment | added | Sparkler | what exactly do you mean by "enter orbital interaction"? covalent bond? | |
| Feb 12, 2015 at 19:28 | comment | added | Crystal Lettuce | Those are some of the most common numbers in gold cluster chemistry, like $\ce{Au13(PR3)12}$ for example. 55 and 144 can be found in thiolated gold clusters. | |
| Feb 12, 2015 at 19:23 | comment | added | Sparkler | where do the numbers 13,55,144 come from? | |
| Feb 12, 2015 at 19:17 | history | answered | Crystal Lettuce | CC BY-SA 3.0 |