Herein, lipid-coated polyaniline (LiPAni) nanoparticles were fabricated to monitor the redox state of cancer cells. To confirm the characteristics of LiPAni, we firstly analyzed the size and chemical structures of the LiPAni nanoparticles. The absorbance properties of the LiPAni nanoparticles were observed to vary with the pH conditions. Furthermore, cell viability tests conducted with breast cancer cell lines showed that the cell viability of the cells with LiPAni nanoparticles was dramatically increased compared to those with the Tween80-coated polyaniline nanoparticles (TPAni) as a control. Subsequently, the colors of the LiPAni nanoparticles were observed and analyzed using spectroscopic methods. Finally, in order to investigate the more accurate sensing of the redox state using the color changes of the LiPAni nanoparticles with cancer cell lines, dark field microscopic images and scattering spectra were recorded at the single nanoparticle scale. For the TPAni nanoparticles, there was only a change in brightness and no change in color, but for the LiPAni nanoparticles, there was a change of color from yellow to pink in the dark field images.
Bibliographical noteFunding Information:
This work was supported by the projects of Korea Institute of Machinery and Materials (KIMM) (NK232D), the National Research Foundation of Korea grant funded by the Korean government (NRF-2019R1I1A1A01057005, NRF-2021R1C1C1012822, NRF-2020R1I1A1A01060851, NRF-2017M3A9G5083322), and Development of Measurement Standards and Technology for Biomaterials and Medical Convergence funded by Korea Research Institute of Standards and Science (KRISS – 2020 – GP2020-0004).
© The Royal Society of Chemistry 2021.
All Science Journal Classification (ASJC) codes
- Biomedical Engineering
- Materials Science(all)