Phase transition induced formation of hollow structures in colloidal lanthanide-doped NaYF4 nanocrystals
Source abstract
Abstract
Formation of colloidal hollow structures in NaYF4 nanocrystals (NCs) with and without lanthanide ion doping has been observed and inves- tigated via the co-thermolysis of a mixture of trifluoroacetate precursors in trioctylphosphine oxide. The Kirkendall effect in this one-step reaction is driven by the monomer diffusion and crystal phase transition. It is found that three kinetic stages which include rapid precipitation of cubic phase NCs, cubic to hexagonal phase transition concurrent with an inward transport of NaF species, and vacancy diffu- sion are attributed to the hollow structure formation. X-ray energy dispersive spectroscopy (XEDS) point analysis is applied to examine the ions distribu- tion and crystalline components in the lanthanides (Yb and Er)-doped NaYF4 up-conversion nanophos- phors (UCNPs). The hollow structures increase the surface-to-volume of a single NC and thus have a significant effect on the photoluminescence of the lanthanide-doped NPs and provide synthetic applica- tions for achieving novel NaYF4-based NCs.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Inorganic Fluorides and Related Compounds · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Cao HL, Qian XF, Wang C, Ma XD, Yin J, Zhu ZK (2005) High symmetric 18-facet polyhedron nanocrystals of Cu7S4 with a hollow nanocage. J Am Chem Soc 127:16024–1602510.1021/ja055265y ↗
2. Chang Y, Teo JJ, Zeng HC (2005) Formation of colloidal CuO nanocrystallites and their spherical aggregation and reductive transformation to hollow CU2O nanospheres. Langmuir 21:1074–107910.1021/la047671l ↗
3. Chen XY, Zhuang HZ, Liu GK, Li S, Niedbala RS (2003) Confinement on energy transfer between luminescent centers in nanocrystals. J Appl Phys 94:5559–556510.1063/1.1614865 ↗
4. Chiang RK, Chiang RT (2007) Formation of hollow Ni2P nanoparticles based on the nanoscale Kirkendall effect. Inorg Chem 46:369–37110.1021/ic061846s ↗
5. Dhas NA, Suslick KS (2005) Sonochemical preparation of hollow nanospheres and hollow nanocrystals. J Am Chem Soc 127:2368–236910.1021/ja049494g ↗
6. Fan HJ, Knez M, Scholz R, Hesse D, Nielsch K, Zacharias M, Gosele U (2007) Influence of surface diffusion on the formation of hollow nanostructures induced by the Kirkendall effect: the basic concept. Nano Lett 7:993–99710.1021/nl070026p ↗
7. Gao JH, Zhang B, Zhang XX, Xu B (2006) Magnetic-dipolar-interaction-induced self-assembly affords wires of hollow nanocrystals of cobalt selenide. Angew Chem Int Ed Engl 45:1220–122310.1002/anie.200503486 ↗
8. Gou LF, Murphy CJ (2003) Solution-phase synthesis of Cu2O nanocubes. Nano Lett 3:231–23410.1021/nl0258776 ↗
9. Jiao SH, Xu LF, Jiang K, Xu DS (2006) Well-defined non-spherical copper sulfide mesocages with single-crystalline shells by shape-controlled Cu2O crystal templating. Adv Mater 18:1174–117810.1002/adma.200502386 ↗
10. Kramer KW, Biner D, Frei G, Gudel HU, Hehlen MP, Luthi SR (2004) Hexagonal sodium yttrium fluoride based green and blue emitting upconversion phosphors. Chem Mater 16:1244–125110.1021/cm031124o ↗
11. Liang HP, Zhang HM, Hu JS, Guo YG, Wan LJ, Bai CL (2004) Pt hollow nanospheres: facile synthesis and enhanced electrocatalysts. Angew Chem Int Ed Engl 43:1540–154310.1002/anie.200352956 ↗
12. Liu B, Zeng HC (2004) Fabrication of ZnO “dandelions” via a modified Kirkendall process. J Am Chem Soc 126:16744–1674610.1021/ja044825a ↗
13. Liu GK, Zhuang HZ, Chen XY (2002) Restricted phonon relaxation and anomalous thermalization of rare earth ions in nanocrystals. Nano Lett 2:535–53910.1021/nl0255303 ↗
14. Mai HX, Zhang YW, Si R, Yan ZG, Sun LD, You LP, Yan CH (2006) High-quality sodium rare-earth fluoride nanocrystals: controlled synthesis and optical properties. J Am Chem Soc 128:6426–643610.1021/ja060212h ↗
15. Mai HX, Zhang YW, Sun LD, Yan CH (2007) Size- and phase-controlled synthesis of monodisperse NaYF4: Yb, Er nanocrystals from a unique delayed nucleation pathway monitored with upconversion spectroscopy. J Phys Chem C 111:13730–1373910.1021/jp073919e ↗
16. Shan JN, Ju YG (2007) Controlled synthesis of lanthanide-doped NaYF4 upconversion nanocrystals via ligand induced crystal phase transition and silica coating. Appl Phys Lett 91:12310310.1063/1.2783476 ↗
17. Shan J, Ju Y (2009) Single-step synthesis and kinetic mechanism of monodisperse and hexagonal-phase NaYF4: Yb, Er upconversion nanophosphors. Nanotechnology 20:27560310.1088/0957-4484/20/27/275603 ↗
18. Shan J, Qin X, Yao N, Ju Y (2007) Synthesis of monodisperse hexagonal NaYF4: Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals in TOPO. Nanotechnology 18:44560710.1088/0957-4484/18/44/445607 ↗
19. Shan J, Chen J, Meng J, Collins J, Soboyejo W, Friedberg JS, Ju Y (2008) Biofunctionalization, cytotoxicity, and cell uptake of lanthanide doped hydrophobically ligated NaYF4 upconversion nanophosphors. J Appl Phys 104:09430810.1063/1.3008028 ↗
20. Shen J, Sun LD, Yan CH (2008) Luminescent rare earth nanomaterials for bioprobe applications. Dalton Transactions 568:7–5697
21. Smigelskas AD, Kirkendall EO (1947) Zinc Diffusion in Alpha-Brass. Transactions of the American Institute of Mining and Metallurgical Engineers 171:130–142
22. Sun YG, Xia YN (2002) Shape-controlled synthesis of gold and silver nanoparticles. Science 298:2176–217910.1126/science.1077229 ↗
23. Sun YG, Mayers BT, Xia YN (2002) Template-engaged replacement reaction: A one-step approach to the large-scale synthesis of metal nanostructures with hollow interiors. Nano Letters 2:481–48510.1021/nl025531v ↗
24. Sun CJ, Xu ZH, Hu B, Yi GS, Chow GM, Shen J (2007a) Application of NaYF4 : Yb, Er upconversion fluorescence nanocrystals for solution-processed near infrared photodetectors. Appl Phys Lett 91:19111310.1063/1.2807841 ↗
25. Sun X, Zhang YW, Du YP, Yan ZG, Si R, You LP, Yan CH (2007b) From trifluoroacetate complex precursors to monodisperse rare-earth fluoride and oxyfluoride nanocrystals with diverse shapes through controlled fluorination in solution phase. Chemistry-a European Journal 13:2320–233210.1002/chem.200601072 ↗
26. Wang LY, Li YD (2007) Controlled synthesis and luminescence of lanthanide doped NaYF4 nanocrystals. Chem Mater 19:727–73410.1021/cm061887m ↗
27. Wang CM, Baer DR, Thomas LE, Amonette JE, Antony J, Qiang Y, Duscher G (2005a) Void formation during early stages of passivation: Initial oxidation of iron nanoparticles at room temperature. J Appl Phys 98:09430810.1063/1.2130890 ↗
28. Wang YL, Cai L, Xia YN (2005b) Monodisperse spherical colloids of Pb and their use as chemical templates to produce hollow particles. Adv Mater (Weinheim, Fed Repub Ger) 17:473–47810.1002/adma.200401416 ↗
29. Yi GS, Chow GM (2006) Synthesis of hexagonal-phase NaYF4 : Yb, Er and NaYF4 : Yb, Tm nanocrystals with efficient up-conversion fluorescence. Adv Func Mater 16:2324–232910.1002/adfm.200600053 ↗
30. Yin YD, Rioux RM, Erdonmez CK, Hughes S, Somorjai GA, Alivisatos AP (2004) Formation of hollow nanocrystals through the nanoscale Kirkendall Effect. Science 304:711–71410.1126/science.1096566 ↗
31. Yin YD, Erdonmez CK, Cabot A, Hughes S, Alivisatos AP (2006) Colloidal synthesis of hollow cobalt sulfide nanocrystals. Adv Func Mater 16:1389–139910.1002/adfm.200600256 ↗