Citation: Yidan Chen, Luyang Liu, Jichun Li, Yu Deng, Hongxiu Yu, Kaiping Yuan, Yuanyuan Zhang, Yu Wang, Yonghui Deng. Flexible gas sensors based on in situ fabricated hierarchically porous SnO₂/PEDOT:PSS sensing layer[J]. Chinese Chemical Letters, ;2026, 37(4): 111654. doi: 10.1016/j.cclet.2025.111654 shu

Flexible gas sensors based on in situ fabricated hierarchically porous SnO₂/PEDOT:PSS sensing layer

Yidan Chen ^a ,
Luyang Liu ^a ,
Jichun Li ^a ,
Yu Deng ^a ,
Hongxiu Yu ^{a, *,} ,
Kaiping Yuan ^{b, *,} ,
Yuanyuan Zhang ^c ,
Yu Wang ^{c, *,} ,
Yonghui Deng ^{a, *,}

a.
Department of Chemistry, Shanghai Stomatological Hospital & School of Stomatology, State Key Laboratory of Coatings for Advanced Equipment, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
b.
Frontier Institute of Chip and System, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, China
c.
Department of Cardiology, Shidong Hospital, Shanghai 200438, China

hongxiuyu@fudan.edu.cn

kpyuan@fudan.edu.cn

wangyushidonghos@163.com

yhdeng@fudan.edu.cn

Received Date: 3 June 2025
Revised Date: 17 July 2025
Accepted Date: 30 July 2025
Available Online: 30 July 2025

Figures(6)

Flexible gas sensors show promise in wearable health monitoring and toxic gas detection due to mechanical flexibility and system integration, but they still face challenges such as slow response/recovery dynamics and poor stability. Here, a novel aqueous ink consisting of n-type mesoporous tin oxide (mSnO₂) colloids and p-type poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (abbreviated as PEDOT:PSS) was designed and deposited on oxygen plasma treated polyimine (PI) substrate with pre-printed electrodes and heater via automatic dispension printing followed with a subsequent freeze-drying treatment, resuling in hierarchically porous sensing layer with mesopore channels and macroporous framework on the flexible PI substrate. The resultant SnO₂/PEDOT:PSS sensor showed excellent sensing performance (6%-30.5%) toward low-concentration ammonia (1–100 ppm), rapid response/recovery speed (61 s/25 s) and superior mechanical stability. Furthermore, the sensor was integrated into a Bluetooth-enabled smart bracelet, achieving real-time monitoring of environmetal ammonia concentration and showcasing its potential for wearable electronics in dectecting volatile harmful gases.
- Porous materials,
- Organic-inorganic nanocomposites,
- Flexible gas sensor,
- PEDOT:PSS,
- Tin oxides,
- Ammonia sensor
1. [1]
  C. Oh, H.J. Lee, Nat. Electron. 7 (2024) 1070–1071. doi: 10.1038/s41928-024-01326-6
2. [2]
  P.G. Steeneken, E. Kaiser, G.J. Verbiest, et al., Nat. Rev. Method. Prim. 3 (2023) 60. doi: 10.1038/s43586-023-00250-x
3. [3]
  K. Mahato, T. Saha, S. Ding, et al., Nat. Electron. 7 (2024) 735–750. doi: 10.1038/s41928-024-01247-4
4. [4]
  R.A. Potyrailo, Chem. Rev. 116 (2016) 11877–11923. doi: 10.1021/acs.chemrev.6b00187
5. [5]
  Y. Lu, H. Zhang, Y. Zhao, et al., Adv. Mater. 36 (2024) 2310613. doi: 10.1002/adma.202310613
6. [6]
  I. Cho, K. Lee, Y.C. Sim, et al., Light Sci. Appl. 12 (2023) 95. doi: 10.1038/s41377-023-01120-7
7. [7]
  J. Xu, X. Fan, K. Xu, et al., Nano-Micro Lett. 17 (2025) 115. doi: 10.1007/s40820-024-01645-5
8. [8]
  Y.M. Jo, Y.K. Jo, J.H. Lee, et al., Adv. Mater. 35 (2023) 2206842. doi: 10.1002/adma.202206842
9. [9]
  H.J. Han, S.H. Cho, S. Han, et al., Adv. Mater. 33 (2021) 2170350. doi: 10.1002/adma.202170350
10. [10]
  J. Ma, Y. Li, J. Li, et al., Adv. Funct. Mater. 32 (2022) 2107439. doi: 10.1002/adfm.202107439
11. [11]
  B. Feng, Z. Wang, Y. Feng, et al., ACS Nano 18 (2024) 22888–22900. doi: 10.1021/acsnano.4c03566
12. [12]
  S. Park, M. Kim, Y. Lim, et al., Adv. Mater. 36 (2024) 2313731. doi: 10.1002/adma.202313731
13. [13]
  Z. Wu, H. Wang, Q. Ding, et al., Adv. Funct. Mater. 33 (2023) 2300046. doi: 10.1002/adfm.202300046
14. [14]
  Y. Men, Z. Qin, Z. Yang, et al., Adv. Funct. Mater. 34 (2024) 2316633. doi: 10.1002/adfm.202316633
15. [15]
  Y. Zhou, Y. Zhang, Y. Zhou, et al., Nano Energy 117 (2023) 108881. doi: 10.1016/j.nanoen.2023.108881
16. [16]
  S. Kim, J. Han, J.M. Choi, et al., Adv. Mater. 36 (2024) 2313830. doi: 10.1002/adma.202313830
17. [17]
  J. Lee, J.H. Chun, Y. Kim, et al., ACS Nano 19 (2025) 5515–5525. doi: 10.1021/acsnano.4c14179
18. [18]
  L.X. Ou, M.Y. Liu, L.Y. Zhu, et al., Nano-Micro Lett. 14 (2022) 206. doi: 10.1007/s40820-022-00956-9
19. [19]
  W. Xing, J. Wang, Q. Qian, et al., ACS Appl. Mater. Interfaces 15 (2023) 57717–57725.
20. [20]
  D. Ludescher, P. Ruchka, L. Siegle, et al., Adv. Opt. Mater. 13 (2025) 2403271. doi: 10.1002/adom.202403271
21. [21]
  X. Liu, W. Zheng, R. Kumar, et al., Coord. Chem. Rev. 462 (2022) 214517. doi: 10.1016/j.ccr.2022.214517
22. [22]
  C. Zhu, X. Dong, C. Guo, et al., J. Mater. Chem. A 10 (2022) 12150–12156. doi: 10.1039/d2ta01825j
23. [23]
  S.Mohseni Taromsari, M. Salari, H.H. Shi, et al., Adv. Mater. 37 (2025) 2406349. doi: 10.1002/adma.202406349
24. [24]
  S.H. Lee, J. Han, O.S. Jeon, et al., Compos. Pt. B. 275 (2024) 111305. doi: 10.1016/j.compositesb.2024.111305
25. [25]
  D. Lv, W. Chen, W. Shen, et al., Sensor Actuat. B: Chem. 298 (2019) 126890. doi: 10.1016/j.snb.2019.126890
26. [26]
  L. Jin, K. Yang, L. Chen, et al., Anal. Chem. 95 (2023) 8859–8868. doi: 10.1021/acs.analchem.3c00365
27. [27]
  X. Tian, S. Wang, B. Yao, et al., J. Hazard. Mater. 465 (2024) 133195. doi: 10.1016/j.jhazmat.2023.133195
28. [28]
  Y. Lin, L. Huang, L. Chen, et al., Sensor Actuat. B: Chem. 216 (2015) 176–183. doi: 10.1504/IJSURFSE.2015.068242
29. [29]
  E. Zampetti, S. Pantalei, A. Muzyczuk, et al., Sensor Actuat. B: Chem. 176 (2013) 390–398. doi: 10.1016/j.snb.2012.10.005
30. [30]
  Y. Li, Y. Zhang, Y. Zhou, et al., ACS Sens. 8 (2023) 4132–4142. doi: 10.1021/acssensors.3c01326
31. [31]
  T.Ramos Canabarra Dos Santos, M. De Jesus Bassi, M. Muller De França, et al., ACS Appl. Mater. Interfaces 17 (2025) 13065–13073. doi: 10.1021/acsami.4c03131
32. [32]
  O. Ogbeide, G. Bae, W. Yu, et al., Adv. Funct. Mater. 32 (2022) 2113348. doi: 10.1002/adfm.202113348
33. [33]
  J. Shin, K. Kim, I.S. Min, et al., Adv. Funct. Mater. 35 (2025) 2419110. doi: 10.1002/adfm.202419110
34. [34]
  P. Manjula, R. Boppella, S.V. Manorama, ACS Appl. Mater. Interfaces 4 (2012) 6252–6260. doi: 10.1021/am301840s
35. [35]
  L.V. Kayser, D.J. Lipomi, Adv. Mater. 31 (2019) 1806133. doi: 10.1002/adma.201806133
36. [36]
  H. Zhu, Q. Li, C. Yang, et al., J. Am. Chem. Soc. 140 (2018) 7403–7406. doi: 10.1021/jacs.8b03232
37. [37]
  D. Ni, Y. Chen, H. Song, et al., J. Mater. Chem. A 7 (2019) 1323–1333. doi: 10.1039/c8ta08814d
38. [38]
  X. Fu, J.B. Pedersen, Y. Zhou, et al., Science 379 (2023) 707–712. doi: 10.1126/science.adf4403
39. [39]
  S. Li, Y. Zhou, K. Li, et al., Joule 6 (2022) 2083–2101. doi: 10.1016/j.joule.2022.07.009
40. [40]
  J. Li, L. He, X. Liu, et al., Angew. Chem. Int. Ed. 58 (2019) 1759–1763. doi: 10.1002/anie.201813464
41. [41]
  H. Chen, Y. Chen, H. Zhang, et al., Adv. Funct. Mater. 28 (2018) 1801035. doi: 10.1002/adfm.201801035
42. [42]
  P. Gong, S. Yuan, Z. Yu, et al., J. Am. Chem. Soc 146 (2024) 4036–4044. doi: 10.1021/jacs.3c12135
43. [43]
  G. Song, D. Jiang, J. Wu, et al., Chem. Eng. J. 440 (2022) 135979. doi: 10.1016/j.cej.2022.135979
44. [44]
  D.H. Kim, J.H. Cha, J.Y. Lim, et al., ACS Nano 14 (2020) 16907–16918. doi: 10.1021/acsnano.0c05916
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2. [2]
  Kezhen Qi , Lan Ding , Pitcheri Rosaiah , Zhipeng Yu , Sofia Tikhanova , Vadim Popkov , Ahmed Ismail , Hui Dou , Derong Luo , Feng Liu , Yixue Xu , Shun-Qi Xu , Chunyang Dong , Ramin Hassandoost , Alireza Khataee , Ruiyang Zhang , Ying Zhou , Zijun Huang , Yongming Luo , Dedong He , Yunyun Ma , Zhuo Xing , Claudio Imparato , Aurelio Bifulco . 2030 roadmap on porous materials for energy and environmental applications. Chinese Chemical Letters, 2026, 37(3): 112181-. doi: 10.1016/j.cclet.2025.112181
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4. [4]
  Yuchen Zhang , Lifeng Ding , Zhenghe Xie , Xin Zhang , Xiaofeng Sui , Jian-Rong Li . Porous sorbents for direct capture of carbon dioxide from ambient air. Chinese Chemical Letters, 2025, 36(3): 109676-. doi: 10.1016/j.cclet.2024.109676
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  Xiangshuai Li , Jian Zhao , Li Luo , Zhuohao Jiao , Ying Shi , Shengli Hou , Bin Zhao . Visual and portable detection of metronidazole realized by metal-organic framework flexible sensor and smartphone scanning. Chinese Chemical Letters, 2024, 35(10): 109407-. doi: 10.1016/j.cclet.2023.109407
6. [6]
  Binhan Zhao , Zheng Li , Lan Zheng , Zhichao Ye , Yuyang Yuan , Shanshan Zhang , Bo Liang , Tianyu Li . Recent progress in the biomedical application of PEDOT:PSS hydrogels. Chinese Chemical Letters, 2024, 35(10): 109810-. doi: 10.1016/j.cclet.2024.109810
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  Zhe Ji , Guangxu Lan , Jiangnan Li , Sihai Yang . A New Protocol to Construct Molecular Materials: A Brief Introduction on the 2025 Nobel Prize in Chemistry. University Chemistry, 2025, 40(12): 70-77. doi: 10.12461/PKU.DXHX202511097
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Flexible gas sensors based on in situ fabricated hierarchically porous SnO2/PEDOT:PSS sensing layer

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通讯作者: 陈斌, bchen63@163.com

Flexible gas sensors based on in situ fabricated hierarchically porous SnO₂/PEDOT:PSS sensing layer