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Prolate spheroidal hematite particles equatorially belt with drug-carrying layered double hydroxide disks: Ring Nebula-like nanocomposites.

Nedim Ay A, Konuk D, Zümreoglu-Karan B - Nanoscale Res Lett (2011)

Bottom Line: Spindle-shaped hematite nanoparticles with average length of 225 nm and width of 75 nm were obtained by thermal decomposition of hydrothermally synthesized hematite.The particles were first coated with Mg-Al-NO3-LDH shell and then subjected to anion exchange with salicylate ions.The resulting bio-nanohybrid displayed a close structural resemblance to that of the Ring Nebula.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, Hacettepe University, Beytepe Campus, 06800 Ankara, Turkey. bkaran@hacettepe.edu.tr.

ABSTRACT
A new nanocomposite architecture is reported which combines prolate spheroidal hematite nanoparticles with drug-carrying layered double hydroxide [LDH] disks in a single structure. Spindle-shaped hematite nanoparticles with average length of 225 nm and width of 75 nm were obtained by thermal decomposition of hydrothermally synthesized hematite. The particles were first coated with Mg-Al-NO3-LDH shell and then subjected to anion exchange with salicylate ions. The resulting bio-nanohybrid displayed a close structural resemblance to that of the Ring Nebula. Scanning electron microscope and transmission electron microscopy images showed that the LDH disks are stacked around the equatorial part of the ellipsoid extending along the main axis. This geometry possesses great structural tunability as the composition of the LDH and the nature of the interlayer region can be tailored and lead to novel applications in areas ranging from functional materials to medicine by encapsulating various guest molecules.

No MeSH data available.


Related in: MedlinePlus

Morphological resemblance of the as-prepared nanocomposite to The Ring Nebula. TEM image of α-Fe2O3@SAL-LDH (end-on view) (A). The Ring Nebula (end-on view; Credit: Hubble Heritage, http://www.nasa.gov) (B)
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Figure 2: Morphological resemblance of the as-prepared nanocomposite to The Ring Nebula. TEM image of α-Fe2O3@SAL-LDH (end-on view) (A). The Ring Nebula (end-on view; Credit: Hubble Heritage, http://www.nasa.gov) (B)

Mentions: The anisotropic morphology of the α-Fe2O3@SAL-LDH particles was revealed by SEM and TEM analyses. It is clearly seen from the SEM image that LDH disks are stacked parallel to the short axis and extend along the long axis of the prolate spheroidal α-Fe2O3 core, giving rise to a heterostructured nanohybrid (Figure 1C). This structural feature has a unique resemblance to that of the Ring Nebula, which is 2,000 light years away from our planet. This Nebula has thick equatorial rings extending through its main axis of symmetry. It appears to be a non-spherical planetary nebula with strong concentrations material around the waist (Figure 2).


Prolate spheroidal hematite particles equatorially belt with drug-carrying layered double hydroxide disks: Ring Nebula-like nanocomposites.

Nedim Ay A, Konuk D, Zümreoglu-Karan B - Nanoscale Res Lett (2011)

Morphological resemblance of the as-prepared nanocomposite to The Ring Nebula. TEM image of α-Fe2O3@SAL-LDH (end-on view) (A). The Ring Nebula (end-on view; Credit: Hubble Heritage, http://www.nasa.gov) (B)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211161&req=5

Figure 2: Morphological resemblance of the as-prepared nanocomposite to The Ring Nebula. TEM image of α-Fe2O3@SAL-LDH (end-on view) (A). The Ring Nebula (end-on view; Credit: Hubble Heritage, http://www.nasa.gov) (B)
Mentions: The anisotropic morphology of the α-Fe2O3@SAL-LDH particles was revealed by SEM and TEM analyses. It is clearly seen from the SEM image that LDH disks are stacked parallel to the short axis and extend along the long axis of the prolate spheroidal α-Fe2O3 core, giving rise to a heterostructured nanohybrid (Figure 1C). This structural feature has a unique resemblance to that of the Ring Nebula, which is 2,000 light years away from our planet. This Nebula has thick equatorial rings extending through its main axis of symmetry. It appears to be a non-spherical planetary nebula with strong concentrations material around the waist (Figure 2).

Bottom Line: Spindle-shaped hematite nanoparticles with average length of 225 nm and width of 75 nm were obtained by thermal decomposition of hydrothermally synthesized hematite.The particles were first coated with Mg-Al-NO3-LDH shell and then subjected to anion exchange with salicylate ions.The resulting bio-nanohybrid displayed a close structural resemblance to that of the Ring Nebula.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, Hacettepe University, Beytepe Campus, 06800 Ankara, Turkey. bkaran@hacettepe.edu.tr.

ABSTRACT
A new nanocomposite architecture is reported which combines prolate spheroidal hematite nanoparticles with drug-carrying layered double hydroxide [LDH] disks in a single structure. Spindle-shaped hematite nanoparticles with average length of 225 nm and width of 75 nm were obtained by thermal decomposition of hydrothermally synthesized hematite. The particles were first coated with Mg-Al-NO3-LDH shell and then subjected to anion exchange with salicylate ions. The resulting bio-nanohybrid displayed a close structural resemblance to that of the Ring Nebula. Scanning electron microscope and transmission electron microscopy images showed that the LDH disks are stacked around the equatorial part of the ellipsoid extending along the main axis. This geometry possesses great structural tunability as the composition of the LDH and the nature of the interlayer region can be tailored and lead to novel applications in areas ranging from functional materials to medicine by encapsulating various guest molecules.

No MeSH data available.


Related in: MedlinePlus