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Volume 19
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Correction to Materials 2019, 12(15), 2491.
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Correction

Correction: Ma et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491

by
Chunyang Ma
1,2,3,†,
Le Jiang
2,3,†,
Yingjin Wang
2,3,
Fangli Gang
2,3,
Nan Xu
2,3,
Ting Li
2,3,
Zhongqun Liu
2,3,
Yongjie Chi
2,3,
Xiumei Wang
2,3,
Lingyun Zhao
2,3,
Qingling Feng
2,3 and
Xiaodan Sun
2,3,*
1
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China
2
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
3
Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2026, 19(14), 3062; https://doi.org/10.3390/ma19143062
Submission received: 18 June 2026 / Accepted: 22 June 2026 / Published: 16 July 2026
Browse Figure
Versions Notes

Figure Legend

In the original publication [1], there was a mistake in the legends for Figures 1 and 6. The correct legends appear below:
  • Figure 1. SEM images (a) and TEM images (b) of tubular PPy nanoparticles (T-PPy), SEM images (c) and TEM images (d) of spherical PPy nanoparticles (S-PPy). Scale bar is 200 nm.
  • Figure 6. SEM images of pure poly-l-lactide (PLLA) film and films containing 10 wt% T-PPy and S-PPy, (a–c) physical images of three films, scale bar is 1 cm (pure, T-PPy, and S-PPy, in turn)), (d–f) SEM images of three films at 104 magnification, scale bar is 200 μm (10 wt% PPy, T-PPy, and S-PPy, in turn), (g–i) SEM images of three films at 10,000 magnification, and scale bar is 1 μm (10 wt% PPy, T-PPy, and S-PPy, in turn).

Error in Figure

In the original publication [1], there was a mistake in Figure 3. The corrected Figure 3 is shown below:
Correspondingly, the citation of Figure 3 in Section 3.3 paragraph 1 has been corrected. The sentence “and scaffold containg S-PPy appeared to be more porous” should be deleted.
The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.

Reference

  1. Ma, C.; Jiang, L.; Wang, Y.; Gang, F.; Xu, N.; Li, T.; Liu, Z.; Chi, Y.; Wang, X.; Zhao, L.; et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491. [Google Scholar] [CrossRef] [PubMed]
Materials 19 03062 g003
Figure 3. Optical and SEM images of 3D conductive scaffolds containing 10 wt% T-PPy or S-PPy prepared by combining 3D printing and freeze-drying. (a–c) Optical images of 3D conductive scaffolds (pure, tubular, and spherical in turn), (d–f) SEM images of the scaffolds at the magnification of 26, scale bar is 200 μm, (pure, tubular, and spherical in turn), (g–i) SEM images of the scaffolds at the magnification of 1000, scale bar is 10 μm, (j–l) SEM images of the scaffolds at the magnification of 10,000, scale bar is 1 μm.
Figure 3. Optical and SEM images of 3D conductive scaffolds containing 10 wt% T-PPy or S-PPy prepared by combining 3D printing and freeze-drying. (a–c) Optical images of 3D conductive scaffolds (pure, tubular, and spherical in turn), (d–f) SEM images of the scaffolds at the magnification of 26, scale bar is 200 μm, (pure, tubular, and spherical in turn), (g–i) SEM images of the scaffolds at the magnification of 1000, scale bar is 10 μm, (j–l) SEM images of the scaffolds at the magnification of 10,000, scale bar is 1 μm.
Materials 19 03062 g003
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Share and Cite

MDPI and ACS Style

Ma, C.; Jiang, L.; Wang, Y.; Gang, F.; Xu, N.; Li, T.; Liu, Z.; Chi, Y.; Wang, X.; Zhao, L.; et al. Correction: Ma et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491. Materials 2026, 19, 3062. https://doi.org/10.3390/ma19143062

AMA Style

Ma C, Jiang L, Wang Y, Gang F, Xu N, Li T, Liu Z, Chi Y, Wang X, Zhao L, et al. Correction: Ma et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491. Materials. 2026; 19(14):3062. https://doi.org/10.3390/ma19143062

Chicago/Turabian Style

Ma, Chunyang, Le Jiang, Yingjin Wang, Fangli Gang, Nan Xu, Ting Li, Zhongqun Liu, Yongjie Chi, Xiumei Wang, Lingyun Zhao, and et al. 2026. "Correction: Ma et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491" Materials 19, no. 14: 3062. https://doi.org/10.3390/ma19143062

APA Style

Ma, C., Jiang, L., Wang, Y., Gang, F., Xu, N., Li, T., Liu, Z., Chi, Y., Wang, X., Zhao, L., Feng, Q., & Sun, X. (2026). Correction: Ma et al. 3D Printing of Conductive Tissue Engineering Scaffolds Containing Polypyrrole Nanoparticles with Different Morphologies and Concentrations. Materials 2019, 12, 2491. Materials, 19(14), 3062. https://doi.org/10.3390/ma19143062

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