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This study developed a 3D-printed mesh for controlled carbon dot release, showing enhanced plant growth. These carbon dots show potential as nanofertilizers and fluorescent biolabels.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Plant Biology

Background:

  • Controlled release systems are crucial for targeted delivery of nanoparticles.
  • Carbon dots (C-dots) have potential applications in agriculture and bioimaging.
  • 3D printing offers precise fabrication of complex structures for material delivery.

Purpose of the Study:

  • To fabricate a core-shell mesh system for controlled release of carbon dots (C-dots).
  • To evaluate the efficacy of C-dot release on plant growth and in vivo translocation.
  • To explore the potential of C-dots as nanofertilizers and fluorescent biolabels.

Main Methods:

  • Coaxial direct ink writing was used to create a core-shell mesh.
  • Ink formulations with hydroxypropyl cellulose, polyethylene glycol, polycaprolactone, and sodium alginate were developed.
  • Degradation profiles and C-dot release were monitored using spectrofluorometry.
  • Plant growth assays with Triticum aestivum L. and confocal microscopy were performed.

Main Results:

  • The 3D-printed mesh demonstrated controlled weekly release of C-dots.
  • In vivo translocation of C-dots within plants was successfully observed.
  • Plants treated with C-dots exhibited 2.5-fold faster growth compared to the control group.

Conclusions:

  • The fabricated core-shell mesh system enables effective controlled release of C-dots.
  • Carbon dots show significant potential as effective nanofertilizers for enhancing crop yield.
  • Carbon dots are non-toxic and suitable for fluorescent biolabeling in vivo.