Continuous preparation of hollow polymeric nanocapsules using self-assembly and a photo-crosslinking process of an amphiphilic block copolymer

Xuan Don Nguyen, Hyeong Jin Jeon Nguyen, Van Tien Nguyen Nguyen, Dong Hyeok Park Nguyen, Tae Heon Lee, Hyun Jong Paik, June Huh, Jeung Sang Go

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents a fabrication method of hollow polymeric nanocapsules (HPNCs). The HPNCs were examined to reduce light trapping in an organic light emitting diodes (OLED) device by increasing the refractive index contrast. They were continuously fabricated by the sequential process of self-assembly and photo-crosslinking of an amphiphilic block copolymer of SBR-b-PEGMA, poly(styrene-r-butadiene)-b-poly(poly(ethylene glycol) methyl ether methacrylate) in a flow-focusing microfluidic device. After the photo-crosslinking process, the produced HPNCs have a higher resistance to water and organic solvents, which is applicable to the fabrication process of optical devices. The morphology and hollow structure of the produced nanocapsules were determined by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Also, their size control was examined by varying the ratio of inlet flow rates and the morphological difference was studied by changing the polymer concentration. The size was measured by dynamic light scattering (DLS). The refractive index of the layer with and without the HPNCs was measured, and a lower refractive index was obtained in the HPNCs-dispersed layer. In future work, the light extraction efficiency of the HPNCs-dispersed OLED will be examined.

Original languageEnglish
Article number1892
Issue number11
Publication statusPublished - 2017 Nov

Bibliographical note

Funding Information:
funded by the Korea Government (MSIP) (No. 2017R1A2B2006264). This work was also supported by the Financial Supporting Project of Long-Term Overseas Dispatch of PNU's Tenure-Track Faculty, 2015.

Funding Information:
Acknowledgments: This work was supported by the National Research Foundation of Korea (NRF) grant funded


  • Block copolymer
  • Hollow nanocapsules
  • Light trapping
  • OLED

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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