| Full text | |
| Author(s): |
Pacheco, Rafael Rocha
[1]
;
Garcia-Flores, Ali Francisco
[2]
;
Soto-Montero, Jorge Rodrigo
[3]
;
Lesseux, Guilherme Gorgen
[4]
;
Rocha Acosta Lancelotti, Ailla Carla
[4]
;
Martinez, Eduardo David
[4]
;
Rettori, Carlos
[2]
;
Urbano, Ricardo Rodrigues
[4]
;
Rueggeberg, Frederick Allen
[5]
;
Giannini, Marcelo
[6]
Total Authors: 10
|
| Affiliation: | [1] Univ Detroit Mercy, Dept Restorat Dent, Detroit, MI 48221 - USA
[2] Univ Fed ABC UFABC, Ctr Nat & Human Sci, Santo Andre, SP - Brazil
[3] Univ Costa Rica, Fac Dent, Dept Restorat Sci, San Jose - Costa Rica
[4] Univ Estadual Campinas Unicamp, Inst Phys Gleb Wataghin, Dept Quantum Elect, Campinas, SP - Brazil
[5] Augusta Univ, Dent Coll Georgia, Dept Restorat Sci, Augusta, GA - USA
[6] Univ Estadual Campinas Unicamp, Piracicaba Dent Sch, Dept Restorat Dent, Piracicaba, SP - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Brazilian Oral Research; v. 35, 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Abstract: The purpose of this study was to describe the synthesis, characterization, and functionalization of b-NaYF4:30%Yb/0.5%Tm upconverting nanocrystals for use as nanofillers in a dental adhesive and microscopically evaluate the interface between the particles and a commercial adhesive. The upconverting nanoparticles were synthesized and purified by thermal decomposition, and their chemical composition determined by energy dispersive X-Ray spectroscopy. The crystalline structure was characterized using X-Ray diffraction and morphology and size were observed with scanning and transmission electron microscopy. Upconverting emission was evaluated by spectrophotometry irradiating the particles with a 975 nm diode laser. Particles were functionalized with polyacrylic acid and the success was confirmed by measurement of Zeta Potential and transmission electron microscopy. The results of X-ray diffraction found a pure hexagonal phase crystalline pattern. Scanning electron microscopy showed uniform dispersion of hexagonal-shaped particles of approximately 150 nm. Upconversion emission was observed in 344 nm, 361 nm, 450 nm, 474nm, 646 nm, 803 nm. Functionalization success was confirmed by formation of a stable aqueous colloid with a Zeta potential of −29.5mV and the absence of voids in the particle-adhesive interface on the transmission electron microscopy images. The reported synthesis and functionalization process produced upconverting nanoparticles emitting photons within the blue spectral region (450 nm and 474 nm). (AU) | |
| FAPESP's process: | 11/19924-2 - Study and development of advanced novel materials: electronic, magnetic and nanostructured: an interdisciplinary approach |
| Grantee: | Carlos Rettori |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/04870-7 - Studies of novel complex and advanced materials |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Research Projects - Thematic Grants |