Abstracts Book - IMRC 2018

• SB6-P099
SONOCHEMICAL SYNTHESIS AT ROOM TEMPERATURE OF
HYDROXYAPATITE NANOSTRUCTURES DOPED WITH
LANTHANIDES .
Pedro Perdigon Lagunes 1 , Maricela Santana Vázquez 1 , Octavio Estevez 1 , Cristina Zorrilla
Cangas 1 , Raúl Herrera Becerra 1
1 Universidad Nacional Autónoma de México, Condensed Matter, Mexico.
Hydroxyapatite (HAp) is the most important member of the apatite mineral
group, this is because is present in the mineralized tissues in microscopic
crystals of impure structural complexes. [1] The influence of methods of
synthesis has been extensively investigated. [2] [3] [4] [5] Most of the reports
present the growth of the HAp phase in a rage of temperatures 50 to 150 °C,20
however, our group has demonstrated that it is possible to synthesize HAp
nanostructures at room temperature with the assistance of tannic acid at room
temperature. [6]. This opened the opportunity to develop other materials, such
as HAp doped with other materials such as lanthanides. Nowadays, lanthanides
(Ln) are used in biomedicine as functional probes and contrast agents for
imaging techniques such as magnetic resonance (MRI) and computerized
tomography (CT). [7] [8] [9] This is because their intrinsic magnetic and
absorption properties provoked by their available 4f orbitals. In previous works
our group had demonstrated the feasibility of self – assemble small lanthanide
based nanoparticles with interesting magneto – optic properties suitable for
biomedicine. [10] [11] There had been other studies that already had presented
the interesting characteristics of HAp doped with Ln materials, with the purpose
of joint biomedical and self – reporting properties. [12] [13] Hence, using the
previous knowledge these materials we glimpsed the opportunity to bind both
materials using a sonochemical method at room temperature. With the help of
cavitation bubbles and tannic acid assistance, it was possible to modify the
chemistry of HAp and Ln ions to construct a doped structure that might interact
with bone structures and may promote their growth. Our material presented a
modified crystalline like structure that indicated the binding of HAp and Ln,
selected UV-Vis absorptions that correspond to Eu 2+ and Yb 3+ ions and magnetic
polarization. Therefore, this structure indicates a spliced HAp based material
with interesting magneto – optical properties that may be used to self – report
its behavior to trace tissues recovery.