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One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications

Journal Article


Abstract


  • Water-soluble CdTe/CdS quantum dots (QDs) with tuneable emissions were prepared in aqueous solution at pH = 6-7 via refluxing and hydrothermal treatment. The resultant CdTe/CdS QDs are stabilized with mercaptosuccinic acid (MSA) and show high fluorescence quantum yields (maximum QY is 84%). Characterization with UV-Vis, PL, XPS, XRD and TEM demonstrates a core (CdTe)-shell (CdS) structure, which leads to high fluorescence quantum yields. The effective protection from CdS shell and MSA enables CdTe QDs to be chemically stable in a pH range of 6-9 and less toxic. These merits make our CdTe/CdS QDs very promising for bio-imaging applications, as exemplified by labelling HEK 293 cells.

UOW Authors


  •   Xu, Zhi Ping (external author)
  •   Lu, Gao Qing (Max) (external author)
  •   Zhu, Yian (external author)
  •   Cooper, Helen M. (external author)
  •   Chen, Min (external author)
  •   Li, Zhen

Publication Date


  • 2013

Citation


  • Zhu, Y., Li, Z., Chen, M., Cooper, H. M., Lu, G. & Xu, Z. (2013). One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications. Journal of Colloid and Interface Science, 390 (1), 3-10.

Scopus Eid


  • 2-s2.0-84868473958

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/322

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 3

End Page


  • 10

Volume


  • 390

Issue


  • 1

Abstract


  • Water-soluble CdTe/CdS quantum dots (QDs) with tuneable emissions were prepared in aqueous solution at pH = 6-7 via refluxing and hydrothermal treatment. The resultant CdTe/CdS QDs are stabilized with mercaptosuccinic acid (MSA) and show high fluorescence quantum yields (maximum QY is 84%). Characterization with UV-Vis, PL, XPS, XRD and TEM demonstrates a core (CdTe)-shell (CdS) structure, which leads to high fluorescence quantum yields. The effective protection from CdS shell and MSA enables CdTe QDs to be chemically stable in a pH range of 6-9 and less toxic. These merits make our CdTe/CdS QDs very promising for bio-imaging applications, as exemplified by labelling HEK 293 cells.

UOW Authors


  •   Xu, Zhi Ping (external author)
  •   Lu, Gao Qing (Max) (external author)
  •   Zhu, Yian (external author)
  •   Cooper, Helen M. (external author)
  •   Chen, Min (external author)
  •   Li, Zhen

Publication Date


  • 2013

Citation


  • Zhu, Y., Li, Z., Chen, M., Cooper, H. M., Lu, G. & Xu, Z. (2013). One-pot preparation of highly fluorescent cadmium telluride/cadmium sulfide quantum dots under neutral-pH condition for biological applications. Journal of Colloid and Interface Science, 390 (1), 3-10.

Scopus Eid


  • 2-s2.0-84868473958

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/322

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 3

End Page


  • 10

Volume


  • 390

Issue


  • 1