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Designing novel Sn-Bi, Si-C and Ge-C nanostructures, using simple theoretical chemical similarities.

Zdetsis AD - Nanoscale Res Lett (2011)

Bottom Line: When successful, these concepts are very powerful and transparent, leading to a large variety of nanomaterials based on Si and other group 14 elements, similar to well known and well studied analogous materials based on boron and carbon.Some of the so called predicted structures have been already synthesized, not necessarily with the same rational and motivation.Finally, it is anticipated that such powerful and transparent rules and analogies, in addition to their predictive power, could also lead to far-reaching interpretations and a deeper understanding of already known results and information.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Physics University of Patras, GR 26500, Patra, Greece. zdetsis@upatras.gr.

ABSTRACT
A framework of simple, transparent and powerful concepts is presented which is based on isoelectronic (or isovalent) principles, analogies, regularities and similarities. These analogies could be considered as conceptual extensions of the periodical table of the elements, assuming that two atoms or molecules having the same number of valence electrons would be expected to have similar or homologous properties. In addition, such similar moieties should be able, in principle, to replace each other in more complex structures and nanocomposites. This is only partly true and only occurs under certain conditions which are investigated and reviewed here. When successful, these concepts are very powerful and transparent, leading to a large variety of nanomaterials based on Si and other group 14 elements, similar to well known and well studied analogous materials based on boron and carbon. Such nanomaterias designed in silico include, among many others, Si-C, Sn-Bi, Si-C and Ge-C clusters, rings, nanowheels, nanorodes, nanocages and multidecker sandwiches, as well as silicon planar rings and fullerenes similar to the analogous sp2 bonding carbon structures. It is shown that this pedagogically simple and transparent framework can lead to an endless variety of novel and functional nanomaterials with important potential applications in nanotechnology, nanomedicine and nanobiology. Some of the so called predicted structures have been already synthesized, not necessarily with the same rational and motivation. Finally, it is anticipated that such powerful and transparent rules and analogies, in addition to their predictive power, could also lead to far-reaching interpretations and a deeper understanding of already known results and information.

No MeSH data available.


Related in: MedlinePlus

Comparison of silicon-carbon and boron carbon nanorods. (a) Si-C and (b) B-C nanorods.
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Figure 6: Comparison of silicon-carbon and boron carbon nanorods. (a) Si-C and (b) B-C nanorods.

Mentions: In addition, Hawthorne and collaborators [34,35] have designed and synthesized special carborodes made of chains of icosahedral carboranes interconnected to each other, as shown in Figure 6b, for biomedical applications as drug delivery and radiolabelling agents. The corresponding isostructural and isolobal Si-C nanorods, shown in Figure 6a, are expected to have similar properties and capabilities. The added advantage of such systems, which are based in organosilicon chemistry in analogy to organoboron chemistry, is the lower toxicity and expected higher biocompatibility [35] and biodegradability [36] of silicon. In addition, the possibility for the integration of the diagnostic and therapeutic tools with the current micro- and nano-electronic tools and infrastructure based in silicon technology is very appealing. Such a possibility was first suggested by Zdetsis [22,23]. Finally, it has been shown that each separate unit of the Si-C nanorodes, after the removal of the apical hydrogen atoms, can exist as a separate, independent unit in a form of a nanowheel, similar to the B-C wheel-shaped structures [37,38]. As a test for the predictive power of the boron connection scheme, we have, in parallel to the current investigation, started a search for such Si-C based nanowheels which has been successfully finalized [38]. This is highly suggestive of the endless variety of molecular engineering possibilities of such simple-looking analogies.


Designing novel Sn-Bi, Si-C and Ge-C nanostructures, using simple theoretical chemical similarities.

Zdetsis AD - Nanoscale Res Lett (2011)

Comparison of silicon-carbon and boron carbon nanorods. (a) Si-C and (b) B-C nanorods.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211452&req=5

Figure 6: Comparison of silicon-carbon and boron carbon nanorods. (a) Si-C and (b) B-C nanorods.
Mentions: In addition, Hawthorne and collaborators [34,35] have designed and synthesized special carborodes made of chains of icosahedral carboranes interconnected to each other, as shown in Figure 6b, for biomedical applications as drug delivery and radiolabelling agents. The corresponding isostructural and isolobal Si-C nanorods, shown in Figure 6a, are expected to have similar properties and capabilities. The added advantage of such systems, which are based in organosilicon chemistry in analogy to organoboron chemistry, is the lower toxicity and expected higher biocompatibility [35] and biodegradability [36] of silicon. In addition, the possibility for the integration of the diagnostic and therapeutic tools with the current micro- and nano-electronic tools and infrastructure based in silicon technology is very appealing. Such a possibility was first suggested by Zdetsis [22,23]. Finally, it has been shown that each separate unit of the Si-C nanorodes, after the removal of the apical hydrogen atoms, can exist as a separate, independent unit in a form of a nanowheel, similar to the B-C wheel-shaped structures [37,38]. As a test for the predictive power of the boron connection scheme, we have, in parallel to the current investigation, started a search for such Si-C based nanowheels which has been successfully finalized [38]. This is highly suggestive of the endless variety of molecular engineering possibilities of such simple-looking analogies.

Bottom Line: When successful, these concepts are very powerful and transparent, leading to a large variety of nanomaterials based on Si and other group 14 elements, similar to well known and well studied analogous materials based on boron and carbon.Some of the so called predicted structures have been already synthesized, not necessarily with the same rational and motivation.Finally, it is anticipated that such powerful and transparent rules and analogies, in addition to their predictive power, could also lead to far-reaching interpretations and a deeper understanding of already known results and information.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Physics University of Patras, GR 26500, Patra, Greece. zdetsis@upatras.gr.

ABSTRACT
A framework of simple, transparent and powerful concepts is presented which is based on isoelectronic (or isovalent) principles, analogies, regularities and similarities. These analogies could be considered as conceptual extensions of the periodical table of the elements, assuming that two atoms or molecules having the same number of valence electrons would be expected to have similar or homologous properties. In addition, such similar moieties should be able, in principle, to replace each other in more complex structures and nanocomposites. This is only partly true and only occurs under certain conditions which are investigated and reviewed here. When successful, these concepts are very powerful and transparent, leading to a large variety of nanomaterials based on Si and other group 14 elements, similar to well known and well studied analogous materials based on boron and carbon. Such nanomaterias designed in silico include, among many others, Si-C, Sn-Bi, Si-C and Ge-C clusters, rings, nanowheels, nanorodes, nanocages and multidecker sandwiches, as well as silicon planar rings and fullerenes similar to the analogous sp2 bonding carbon structures. It is shown that this pedagogically simple and transparent framework can lead to an endless variety of novel and functional nanomaterials with important potential applications in nanotechnology, nanomedicine and nanobiology. Some of the so called predicted structures have been already synthesized, not necessarily with the same rational and motivation. Finally, it is anticipated that such powerful and transparent rules and analogies, in addition to their predictive power, could also lead to far-reaching interpretations and a deeper understanding of already known results and information.

No MeSH data available.


Related in: MedlinePlus