About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-25: Synthesis of and New Functionality in Heteroepitaxial Gallate/Ferrite Core@Shell Nanoparticles: A Hybrid Design Strategy for Nanotheranostic |
| Author(s) |
Shah Qasim Jan, Raja Das, Ayomipo Israel Ojo, Yasinthara Wadumesthri, Humberto R. Gutierrez, Dirk Honecker, Steven Parnell, Julie A. Borchers, Hari Srikanth, Dario A. Arena |
| On-Site Speaker (Planned) |
Shah Qasim Jan |
| Abstract Scope |
Achieving simultaneous optical and magnetic functionality within a single nanoscale construct demands precise architectural control at the synthesis level. Here, we present a hybrid all-oxide spinel nanoplatform comprising a luminescent gallate core encapsulated by a magnetic shell, fabricated via a sequential solvothermal and thermal decomposition strategy. Phase purity and core@shell morphology are confirmed by X-ray diffraction and transmission electron microscopy. Optical characterization demonstrates preservation of the characteristic ZGO emission following shell growth. DC magnetometry identifies finite coercivity persisting to 350 K alongside a broadened Verwey transition, with Bloch-law fitting yielding an exponent of 2.29, attributable to finite-size confinement and surface disorder. Polarized SANS, analyzed with a concentric core@void@shell form factor, yields an ensemble-averaged particle diameter of ~22 nm. Magnetic hyperthermia measurements reveal a field-scaling exponent of 1.35 ± 0.23, signifying operation in a mixed relaxation-hysteresis dissipation regime, with ILP values competitive with established commercial benchmarks. |