Designing red-fluorescent superparamagnetic nanoparticles by conjugation with gold clusters.
Agne MikalauskaiteMarijus PleckaitisGiedre GrincieneVitalijus KarabanovasArunas JagminasPublished in: RSC advances (2022)
Photoluminescent (PL) metal and metal oxide nanoclusters (NCs), with a size of just several nanometers, are a separate class of nanomaterials abundant with new attractive optical, physical, and chemical properties and biocompatibility. However, the synthesis of PL magnetic NCs via attachment of PL NCs to iron oxide-based nanoparticles (NPs) is still problematic. Motivated by this, herein, we report the development of a microwave-driven conjugation approach of red-fluorescent gold nanoclusters (BSA@AuNCs) to superparamagnetic NPs. Synthesized CoFe 2 O 4 @AuNCs possess strong photoluminescence in water and ethanol media as well as good colloidal and optical stability, and magnetization response. High-resolution transmission electron microscopy (HRTEM), steady-state and time-resolved photoluminescence spectroscopy, X-ray powder diffraction (XRD), and magnetic measurements from ambient to cryogenic temperatures were applied for structural characterization and evaluation of optical and magnetic properties of the synthesized species.
Keyphrases
- high resolution
- iron oxide
- electron microscopy
- quantum dots
- sensitive detection
- energy transfer
- molecularly imprinted
- oxide nanoparticles
- label free
- living cells
- high speed
- fluorescent probe
- mass spectrometry
- iron oxide nanoparticles
- air pollution
- physical activity
- mental health
- particulate matter
- computed tomography
- light emitting
- solid phase extraction
- radiofrequency ablation
- crystal structure
- genetic diversity