Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Yingying Cai
  • Wentao Peng
  • Qingyuan Song
  • Denis Pluta
  • Christoph Peppersack
  • Sandra Breitung-Faes
  • Arno Kwade
  • Nadja C. Bigall
  • Philipp Vana

External Research Organisations

  • University of Göttingen
  • Technische Universität Braunschweig
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Details

Original languageEnglish
Pages (from-to)465–472
Number of pages8
JournalACS Applied Optical Materials
Volume1
Issue number1
Early online date16 Nov 2022
Publication statusPublished - 27 Jan 2023

Abstract

The ancient inorganic pigment Egyptian Blue is a fluorophore with outstanding near-infrared (NIR) performance and is thus considered as an emerging optical material that meets the current demand for cheap, efficient, and nontoxic NIR nanofluorophores. Herein, we present a protocol for the quick mass production of Egyptian Blue (CaCuSi4O10) nanosheets (EBNSs) with lateral size down to ~100 nm by applying state-ofthe-art ball-milling techniques. A systematic decay of the NIR photoluminescence behavior with decreasing size of the EBNSs was found, which challenges the desired application of EBNSs as bioimaging markers and other nanoapplications. To pave the way to surface modifications of EBNSs, we deposited a thin layer of silica on the surface of the EBNSs. Taking advantage of this modification, we subsequently performed surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization in order to grow both hydrophilic and hydrophobic polymer brushes from EBNSs, which enhanced dispersibility of the nanosheets and even delivered function. By matching the refractive index of the EBNS with its polymer shell, the quality of the NIR photoluminescence of the EBNS could significantly be improved, since disturbing light scattering at the interface could effectively be suppressed. Our results provide a clear picture of the advantages and limitations of EBNSs as optical nanomaterials for NIR fluorescence applications.

Keywords

    cuprorivaite, layered silicate, nanocomposite, NIR fluorophore, NIR photoluminescence, silica coating, surface modification, surface-initiated polymerization

ASJC Scopus subject areas

Cite this

Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications. / Cai, Yingying; Peng, Wentao; Song, Qingyuan et al.
In: ACS Applied Optical Materials, Vol. 1, No. 1, 27.01.2023, p. 465–472.

Research output: Contribution to journalArticleResearchpeer review

Cai, Y, Peng, W, Song, Q, Pluta, D, Peppersack, C, Breitung-Faes, S, Kwade, A, Bigall, NC & Vana, P 2023, 'Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications', ACS Applied Optical Materials, vol. 1, no. 1, pp. 465–472. https://doi.org/10.1021/acsaom.2c00114
Cai, Y., Peng, W., Song, Q., Pluta, D., Peppersack, C., Breitung-Faes, S., Kwade, A., Bigall, N. C., & Vana, P. (2023). Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications. ACS Applied Optical Materials, 1(1), 465–472. https://doi.org/10.1021/acsaom.2c00114
Cai Y, Peng W, Song Q, Pluta D, Peppersack C, Breitung-Faes S et al. Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications. ACS Applied Optical Materials. 2023 Jan 27;1(1):465–472. Epub 2022 Nov 16. doi: 10.1021/acsaom.2c00114
Cai, Yingying ; Peng, Wentao ; Song, Qingyuan et al. / Nanoengineering of Egyptian Blue Nanosheets: Advantages and Limitations for Near-Infrared Photoluminescence Applications. In: ACS Applied Optical Materials. 2023 ; Vol. 1, No. 1. pp. 465–472.
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