Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 14
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Kim, Su Yeon Jeong, Jong Seok Mkhoyan, K. Andre and Jang, Ho Seong 2016. Direct observation of the core/double-shell architecture of intense dual-mode luminescent tetragonal bipyramidal nanophosphors. Nanoscale, Vol. 8, Issue. 19, p. 10049.


    Sheng, Yang Liao, Lun-De Bandla, Aishwarya Liu, Yu-Hang Thakor, Nitish and Tan, Mei Chee 2016. Size and Shell Effects on the Photoacoustic and Luminescence Properties of Dual Modal Rare-Earth-Doped Nanoparticles for Infrared Photoacoustic Imaging. ACS Biomaterials Science & Engineering, Vol. 2, Issue. 5, p. 809.


    Zhou, Jing Liu, Qian Feng, Wei Sun, Yun and Li, Fuyou 2015. Upconversion Luminescent Materials: Advances and Applications. Chemical Reviews, Vol. 115, Issue. 1, p. 395.


    Wang, Jiasheng Shah, Zameer Hussain Zhang, Shufen and Lu, Rongwen 2014. Silica-based nanocomposites via reverse microemulsions: classifications, preparations, and applications. Nanoscale, Vol. 6, Issue. 9, p. 4418.


    Yıldırım, Cansu and Birer, Özgür 2014. Ultraviolet upconversion spectra of sonochemically synthesized doped NaYF4 crystals. Chemical Physics, Vol. 445, p. 46.


    Zhang, Yan Wei, Wei Das, Gautom Kumar and Yang Tan, Timothy Thatt 2014. Engineering lanthanide-based materials for nanomedicine. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, Vol. 20, p. 71.


    Zhang, Jiayin Qin, Feng Zhao, Hua Yang, Xin Zhang, Xitian Wang, Xuanzhang Gao, Hong Zhang, Zhiguo and Cao, Wenwu 2014. Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers. CrystEngComm, Vol. 16, Issue. 43, p. 9974.


    Fan, Yao-yao Hu, Zong-chao Yang, Jian Zhang, Chao and Zhu, Ling 2013. Ultrasonic-assisted synthesis of core–shell structure CePO4:Tb/GdPO4 and GdPO4/CePO4:Tb nanophosphors and their photoluminescence properties. Applied Surface Science, Vol. 266, p. 22.


    Tian, Qing Sun, Kang and Tao, Ke 2013. β-NaYF4:Yb, Er at β-NaYF4 core/shell nanocrystals with significantly enhanced upconversion fluorescence by a successive two-step hot-injection approach. Micro & Nano Letters, Vol. 8, Issue. 10, p. 731.


    Xie, Dini Peng, Hongshang Huang, Shihua and You, Fangtian 2013. Core-Shell Structure in Doped Inorganic Nanoparticles: Approaches for Optimizing Luminescence Properties. Journal of Nanomaterials, Vol. 2013, p. 1.


    Su, Qianqian Han, Sanyang Xie, Xiaoji Zhu, Haomiao Chen, Hongyu Chen, Chih-Kai Liu, Ru-Shi Chen, Xueyuan Wang, Feng and Liu, Xiaogang 2012. The Effect of Surface Coating on Energy Migration-Mediated Upconversion. Journal of the American Chemical Society, Vol. 134, Issue. 51, p. 20849.


    Tao, Qingling Li, Zhengquan Zeng, Yubin and Zhang, Yong 2012. Facile preparation of hydrophilic sodium yttrium fluoride nanorods using hydrophobic nanospheres as precursor. Journal of Materials Research, Vol. 27, Issue. 16, p. 2101.


    Nagarajan, Sounderya and Zhang, Yong 2011. Upconversion fluorescent nanoparticles as a potential tool for in-depth imaging. Nanotechnology, Vol. 22, Issue. 39, p. 395101.


    Qian, Li Peng Zhou, Li Han Too, Heng-Phon and Chow, Gan-Moog 2011. Gold decorated NaYF4:Yb,Er/NaYF4/silica (core/shell/shell) upconversion nanoparticles for photothermal destruction of BE(2)-C neuroblastoma cells. Journal of Nanoparticle Research, Vol. 13, Issue. 2, p. 499.


    ×

Critical shell thickness and emission enhancement of NaYF4:Yb,Er/NaYF4/silica core/shell/shell nanoparticles

  • Li Peng Qian, Du Yuan, Guang Shun Yi (a1) and Gan Moog Chow (a1)
  • DOI: http://dx.doi.org/10.1557/jmr.2009.0432
  • Published online: 01 January 2011
Abstract

Amorphous silica shells, used for functionalization of inorganic nanoparticles in bioapplications, were coated on chemically synthesized NaYF4:Yb,Er upconversion fluorescent nanoparticles via a reverse microemulsion method by using dual surfactants of polyoxyethylene (5) nonylphenylether and 1-hexanol, and tetraethyl orthosilicate as precursor. NaYF4:Yb,Er nanoparticles were equiaxed with a particle size of 11.1 ± 1.3 nm. The thickness of silica shell was ∼8 nm. NaYF4:Yb,Er/silica core/shell nanoparticles were well dispersed in solvents such as ethanol and deionized water. The emission intensities of NaYF4:Yb,Er/silica core/shell nanoparticles remained the same as that of uncoated nanoparticles after surface functionalization with an amine group using (3-aminopropyl)-trimethoxysilan. Silica, although providing a good barrier to the nonradiative relaxation between the upconversion nanoparticles and the environments, did not enhance the emission intensity of upconversion nanoparticles. To increase the emission intensity of NaYF4:Yb,Er/silica core/shell nanoparticles, an undoped NaYF4 shell (∼3-nm thick) was deposited on the upconversion nanoparticles before the silica coating. The total emission intensity of NaYF4:Yb,Er/NaYF4/silica core/shell/shell nanoparticles increased by 15 times compared to that without the intermediate NaYF4 shell. The critical shell thickness of NaYF4 was ∼3 nm, beyond which no further emission intensity enhancement was observed.

Copyright
Corresponding author
b) Address all correspondence to this author. e-mail: msecgm@nus.edu.sg
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

1.M.X. Yu , F.Y. Li , Z.G. Chen , H. Hu , C. Zhan , H. Yang , and C.H. Huang : Laser scanning up-conversion luminescence microscopy for imaging cells labeled with rare-earth nanophosphors. Anal. Chem. 81, 930 (2009).

2.R. Kumar , M. Nyk , T.Y. Ohulchanskyy , C.A. Flask , and P.N. Prasad : Combined optical and MR bioimaging using rare earth ion doped NaYF4 nanocrystals. Adv. Fund. Mater. 19, 853 (2009).

3.S. Jiang , Y. Zhang , K.M. Lim , E.K.W. Sim , and L. Ye : NIR-to-visible upconversion nanoparticles for fluorescent labeling and targeted delivery of siRNA. Nanotechnology 20, 155101 (2009).

4.J.A. Feijo and N. Moreno : Imaging plant cells by two-photon excitation. Protoplasma 223, 1 (2004).

5.H. Zijlmans , J. Bonnet , J. Burton , K. Kardos , T. Vail , R.S. Niedbala , and H.J. Tanke : Detection of cell and tissue surface antigens using up-converting phosphors: A new reporter technology. Anal. Biochem. 267, 30 (1999).

6.S.R. Sershen , S.L. Westcott , N.J. Halas , and J.L. West : Temperaturesensitive polymer-nanoshell composites for photothermally modulated drug delivery. J. Biomed. Mater. Res. 51, 293 (2000).

7.W.C.W. Chan and S.M. Nie : Quantum dot bioconjugates for ultrasensitive nonisotopic detection. Science 281, 2016 (1998).

8.S. Kim and M.G. Bawendi : Oligomeric ligands for luminescent and stable nanocrystal quantum dots. J. Am. Chem. Soc. 125, 14652 (2003).

9.B. Dubertret , P. Skourides , D.J. Norris , V. Noireaux , A.H. Brivanlou , and A. Libchaber : In vivo imaging of quantum dots encapsulated in phospholipid micelles. Science 298, 1759 (2002).

10.D. Gerion , F. Pinaud , S.C. Williams , W.J. Parak , D. Zanchet , S. Weiss , and A.P. Alivisatos : Synthesis and properties of biocompatible water-soluble silica-coated CdSe/ZnS semiconductor quantum dots. J. Phys. Chem. B 105, 8861 (2001).

11.N. Menyuk , K. Dwight , and J.W. Pierce : NaYF4:Yb,Er—An efficient upconversion phosphor. Appl. Phys. Lett. 21, 159 (1972).

12.F. Wang and X. Liu : Recent advances in the chemistry of lanthanide-doped upconversion nanocrystals. Chem. Soc. Rev. 38, 976 (2009).

13.G.S. Yi and G.M. Chow : Synthesis of hexagonal-phase NaYF4: Yb,Er and NaYF4:Yb,Tm nanocrystals with efficient up-conversion fluorescence. Adv. Funct. Mater. 16, 2324 (2006).

14.J.N. Shan , J.B. Chen , J. Meng , J. Collins , W. Soboyejo , J.S. Friedberg , and Y.G. Ju : Biofunctionalization, cytotoxicity, and cell uptake of lanthanide doped hydrophobically ligated NaYF4 upconversion nanophosphors. J. Appl. Phys. 104, 094308 (2008).

15.Z.Q. Li , Y. Zhang , and S. Jiang : Multicolor core/shell-structured upconversion fluorescent nanoparticles. Adv. Mater. 20, 4765 (2008).

16.X. Peng , M.C. Schlamp , A.V. Kadavanich , and A.P. Alivisatos : Epitaxial growth of highly luminescent CdSe/CdS Core/shell nanocrystals with photostability and electronic accessibility. J. Am. Chem. Soc. 119, 7019 (1997).

17.L. Spanhel , M. Haase , H. Weller , and A. Henglein : Photochemistry of colloidal semiconductors. 20. Surface modification and stability of strong luminescing CdS particles. J. Am. Chem. Soc. 109, 5649 (1987).

18.M.A. Hines and P. Guyot-Sionnest : Synthesis and characterization of strongly luminescing ZnS-Capped CdSe nanocrystals. J. Phys. Chem. 100, 468 (1996).

19.Z.G. Chen , H.L. Chen , H. Hu , M.X. Yu , F.Y. Li , Q. Zhang , Z.G. Zhou , T. Yi , and C.H. Huang : Versatile synthesis strategy for carboxylic acid-functionalized upconverting nanophosphors as biological labels. J. Am. Chem. Soc. 130, 3023 (2008).

20.G.S. Yi and G.M. Chow : Water-soluble NaYF4:Yb,Er(Tm)/NaYF4/polymer core/shell/shell nanoparticles with significant enhancement of upconversion fluorescence. Chem. Mater. 19, 341 (2007).

21.N.O. Nunez , H. Miguez , M. Quintanilla , E. Cantelar , F. Cusso , and M. Ocana : Synthesis of spherical down- and up-conversion NaYF4-based nanophosphors with tunable size in ethylene glycol without surfactants or capping additives. Eur. J. Inorg. Chem. 4517 (2008).

24.C.H. Dong and F. van Veggel : Cation exchange in lanthanide fluoride nanoparticles. ACS Nano. 3, 123 (2009).

25.S.T. Selvan , T.T. Tan , and J.Y. Ying : Robust, non-cytotoxic, silica-coated CdSe quantum dots with efficient photoluminescence. Adv. Mater. 17, 1620 (2005).

26.M. Darbandi , R. Thomann , and T. Nann : Single quantum dots in silica spheres by microemulsion synthesis. Chem. Mater. 17, 5720 (2005).

27.T. Uchino , A. Aboshi , S. Kohara , Y. Ohishi , M. Sakashita , and K. Aoki : Microscopic structure of nanometer-sized silica particles. Phys. Rev. B 69, 155409 (2004).

29.W. Stöer , A. Fink , and E. Bohn : Controlled growth of monodisperse silica spheres in the micron size range. J. Colloid Interface Sci. 26, 62 (1968).

30.F.J. Arriagada and K. Osseoasare : Phase and dispersion stability effects in the synthesis of silica nanoparticles in a nonionic reverse microemulsion. Colloids Surf. 69, 105 (1992).

31.O. Ehlert , R. Thomann , M. Darbandi , and T. Nann : A four-color colloidal multiplexing nanoparticle system. ACS Nano. 2, 120 (2008).

32.H. Hu , L.Q. Xiong , J. Zhou , F.Y. Li , T.Y. Cao , and C.H. Huang : Multimodal-luminescence core-shell nanocomposites for targeted imaging of tumor cells. Chem. Eur. J. 15, 3577 (2009).

33.Q. Lu , F.Y. Guo , L. Sun , A.H. Li , and L.C. Zhao : Silica-/titaniacoated Y2O3:Tm3+,Yb3+ nanoparticles with improvement in upconversion luminescence induced by different thickness shells. J. Appl. Phys. 103, 123533 (2008).

34.Z.Y. Liu , G.S. Yi , H.T. Zhang , J. Ding , Y.W. Zhang , and J.M. Xue : Monodisperse silica nanoparticles encapsulating upconversion fluorescent and superparamagnetic nanocrystals. Chem. Commun. (Camb.). 694 (2008).

35.R. Koole , M.M. van Schooneveld , J. Hilhorst , C.D. Donega , D.C. ‘t. Hart , A. van Blaaderen , D. Vanmaekelbergh , and A. Meijerink : On the incorporation mechanism of hydrophobic quantum dots in silica spheres by a reverse microemulsion method. Chem. Mater. 20, 2503 (2008).

36.J.F. Suyver , J. Grimm , M.K. van Veen , D. Biner , K.W. Kramer , and H.U. Gudel : Upconversion spectroscopy and properties of NaYF4 doped with Er3+, Tm3+ and/or Yb3+. J. Lumin. 117, 1 (2006).

37.G.P. Dong , X.F. Liu , X.D. Xiao , B. Qian , J. Ruan , H.C. Yang , S. Ye , D.P. Chen , and J.R. Qiu : Upconversion luminescence of Er3+-Yb3+ codoped NaYF4-PVP electrospun nanofibers. IEEE Photonics Technol. Lett. 21, 57 (2009).

38.R.C. Powell : Physics of Solid-State Laser Materials (Springer, New York, 1998).

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: