Limits...
Functionalized self-assembled monolayers on mesoporous silica nanoparticles with high surface coverage.

Wei L, Shi D, Zhou Z, Ye P, Wang J, Zhao J, Liu L, Chen C, Zhang Y - Nanoscale Res Lett (2012)

Bottom Line: Mesoporous silica nanoparticles (MSNs) containing vinyl-, propyl-, isobutyl- and phenyl functionalized monolayers were reported.These functionalized MSNs were prepared via molecular self-assembly of organosilanes on the mesoporous supports.The relative surface coverage of the organic monolayers can reach up to 100% (about 5.06 silanes/nm.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
Mesoporous silica nanoparticles (MSNs) containing vinyl-, propyl-, isobutyl- and phenyl functionalized monolayers were reported. These functionalized MSNs were prepared via molecular self-assembly of organosilanes on the mesoporous supports. The relative surface coverage of the organic monolayers can reach up to 100% (about 5.06 silanes/nm.

No MeSH data available.


Related in: MedlinePlus

The schematic illustration of self-assembly of organosilanes on the ceramic oxide surface. Hydrolysis of organosilanes on the oxide surfaces to create the corresponding hydroxylsilanes, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation and condensation of these hydrogen-bound species lead to a closely packed monolayers on the oxide surface.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3475074&req=5

Figure 1: The schematic illustration of self-assembly of organosilanes on the ceramic oxide surface. Hydrolysis of organosilanes on the oxide surfaces to create the corresponding hydroxylsilanes, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation and condensation of these hydrogen-bound species lead to a closely packed monolayers on the oxide surface.

Mentions: Molecular self-assembly of organosilanes has been proven to be a powerful method to rationally engineer the ceramic oxide surface properties [26-29]. In this process, the organo-silanes are hydrolyzed to create the corresponding hydroxylsilanes on the polar oxide surfaces, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation of these hydrogen-bound species, which driven by the attractive van der Waal’s force between the pendant hydrocarbon chain and cross-linking between neighboring silanes, as well as condensation between the hydroxylsilanes and the polar oxide surface lead to a closely packed monolayers on the oxide surface (Figure 1) [23]. Using this method, the relative surface coverage of the monolayers can reach 100% [29]. So far, this method has been successfully applied for functionalizing the bulk mesoporous silicas [20,30,31], but application of this method to produce the monolayer functionalized MSNs with high coverage failed. One possible reason is that the functional molecules are very easy transferred out of the pores of MSNs during functionalization process, leading to poor surface coverage.


Functionalized self-assembled monolayers on mesoporous silica nanoparticles with high surface coverage.

Wei L, Shi D, Zhou Z, Ye P, Wang J, Zhao J, Liu L, Chen C, Zhang Y - Nanoscale Res Lett (2012)

The schematic illustration of self-assembly of organosilanes on the ceramic oxide surface. Hydrolysis of organosilanes on the oxide surfaces to create the corresponding hydroxylsilanes, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation and condensation of these hydrogen-bound species lead to a closely packed monolayers on the oxide surface.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3475074&req=5

Figure 1: The schematic illustration of self-assembly of organosilanes on the ceramic oxide surface. Hydrolysis of organosilanes on the oxide surfaces to create the corresponding hydroxylsilanes, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation and condensation of these hydrogen-bound species lead to a closely packed monolayers on the oxide surface.
Mentions: Molecular self-assembly of organosilanes has been proven to be a powerful method to rationally engineer the ceramic oxide surface properties [26-29]. In this process, the organo-silanes are hydrolyzed to create the corresponding hydroxylsilanes on the polar oxide surfaces, and then, these hydroxylsilanes absorb on the surface via hydrogen bond. Aggregation of these hydrogen-bound species, which driven by the attractive van der Waal’s force between the pendant hydrocarbon chain and cross-linking between neighboring silanes, as well as condensation between the hydroxylsilanes and the polar oxide surface lead to a closely packed monolayers on the oxide surface (Figure 1) [23]. Using this method, the relative surface coverage of the monolayers can reach 100% [29]. So far, this method has been successfully applied for functionalizing the bulk mesoporous silicas [20,30,31], but application of this method to produce the monolayer functionalized MSNs with high coverage failed. One possible reason is that the functional molecules are very easy transferred out of the pores of MSNs during functionalization process, leading to poor surface coverage.

Bottom Line: Mesoporous silica nanoparticles (MSNs) containing vinyl-, propyl-, isobutyl- and phenyl functionalized monolayers were reported.These functionalized MSNs were prepared via molecular self-assembly of organosilanes on the mesoporous supports.The relative surface coverage of the organic monolayers can reach up to 100% (about 5.06 silanes/nm.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
Mesoporous silica nanoparticles (MSNs) containing vinyl-, propyl-, isobutyl- and phenyl functionalized monolayers were reported. These functionalized MSNs were prepared via molecular self-assembly of organosilanes on the mesoporous supports. The relative surface coverage of the organic monolayers can reach up to 100% (about 5.06 silanes/nm.

No MeSH data available.


Related in: MedlinePlus