The role of nanoparticle structure and morphology in the dissolution kinetics and nutrient release of nitrate‑doped calcium phosphate nanofertilizers
Metadatos
Mostrar el registro completo del ítemEditorial
Nature Research
Fecha
2020-07-24Referencia bibliográfica
Carmona, F. J., Dal Sasso, G., Bertolotti, F., Ramírez-Rodríguez, G. B., Delgado-López, J. M., Pedersen, J. S., ... & Guagliardi, A. (2020). The role of nanoparticle structure and morphology in the dissolution kinetics and nutrient release of nitrate-doped calcium phosphate nanofertilizers. Scientific reports, 10(1), 1-13. [https://doi.org/10.1038/s41598-020-69279-2]
Patrocinador
Fondazione Cariplo 2016-0648; FEDER/Ministerio de Ciencia, Innovacion y Universidades-Agencia Estatal de Investigacion (FEDER/MCIU/AEI, Spain) through the project NanoVIT RTI-2018-095794-A-C22; FEDER/Ministerio de Ciencia, Innovacion y Universidades-Agencia Estatal de Investigacion (FEDER/MCIU/AEI, Spain) through the project NanoSmart RYC-2016-21042; FEDER/MCIU/AEI within the Juan de la Cierva Program (JdC2017)Resumen
Bio-inspired synthetic calcium phosphate (CaP) nanoparticles (NPs), mimicking the mineral
component of bone and teeth, are emergent materials for sustainable applications in agriculture.
These sparingly soluble salts show self-inhibiting dissolution processes in undersaturated
aqueous media, the control at the molecular and nanoscale levels of which is not fully elucidated.
Understanding the mechanisms of particle dissolution is highly relevant to the efcient delivery of
macronutrients to the plants and crucial for developing a valuable synthesis-by-design approach. It
has also implications in bone (de)mineralization processes. Herein, we shed light on the role of size,
morphology and crystallinity in the dissolution behaviour of CaP NPs and on their nitrate doping
for potential use as (P,N)-nanofertilizers. Spherical fully amorphous NPs and apatite-amorphous
nanoplatelets (NPLs) in a core-crown arrangement are studied by combining forefront Small-Angle
and Wide-Angle X-ray Total Scattering (SAXS and WAXTS) analyses. Ca2+ ion release rates difer
for spherical NPs and NPLs demonstrating that morphology plays an active role in directing the
dissolution kinetics. Amorphous NPs manifest a rapid loss of nitrates governed by surface-chemistry.
NPLs show much slower release, paralleling that of Ca2+ ions, that supports both detectable nitrate
incorporation in the apatite structure and dissolution from the core basal faces.