In situ fabrication of porous polymer films embedded with perovskite nanocrystals for flexible superhydrophobic piezoresistive sensors
Abstract
The application of pressure sensors based on perovskite in high-humidity environments is limited by the effect of water on their stability. Endowing sensors with superhydrophobicity is an effective strategy to overcome the issue. In this work, MAPbBr 3/Polyvinylidene Fluoride-TFSI composite was prepared by a one-step in-situ strategy to form a flexible superhydrophobic pressure sensor, which exhibited a contact angle of 150.25°. The obtained sensor exhibited a sensitivity of 0.916 in 1 kPa, a detection limit of 0.2 Pa, a precision of 0.1 Pa, and a response/recovery of ∼100 ms, along with good thermal stability. Through density functional theory calculations, it is revealed that the formation of the porosity is attributed to the interaction between the polymer and EMIM TFSI, which further leads to superhydrophobicity. And, the perovskite structure is easy to change under pressure, affecting the carrier transport and electrical signals output, which explains the sensing mechanism. In addition, the sensor performed well in monitoring facial expression, pulse, respiration, finger bending, and wind speed ranging from 1 m/s to 6 m/s. With both the Linear Regression and the Random Forest algorithm, the sensor can monitor the wind speed with an R 2 greater than 0.977 in 60 tests.
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A superhydrophobic flexible pressure sensor fabricated using a MAPbBr3/PVDF-TFSI film combined with an EPDM coating demonstrated high sensitivity, a low detection limit, and rapid response, with thermal stability ideal for wearable systems and wind speed monitoring.
“Furthermore, a superhydrophobic flexible pressure sensor was fabricated using a MAPbBr₃/PVDF-TFSI film combined with an EPDM coating, demonstrating high sensitivity, a low detection limit, and rapid response [59].Its thermal stability made it ideal for wearable systems and wind speed monitoring.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [59]
These features made the sensor well-suited for wearable applications, including pulse monitoring and acoustic detection.
“These features made it well-suited for wearable applications, including pulse monitoring and acoustic detection (Figure 14) [55,59,63,[212][213][214][215].”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [59]
The sensor features fast response/recovery (~100 ms) and good thermal stability, which effectively monitored facial expressions, pulse, respiration, finger bending, and wind speeds.
“The sensor also features fast response/ recovery (~100 ms) and good thermal stability, which effectively monitored facial expressions, pulse, respiration, finger bending, and wind speeds.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [59]
A MAPbBr3/Polyvinylidene Fluoride-TFSI composite sensor demonstrates superhydrophobicity (contact angle of 150.25°), high sensitivity (0.916 at 1 kPa), and a low detection limit (0.2 Pa).
“a MAPbBr₃/Polyvinylidene Fluoride-TFSI composite sensor, as illustrated in Figure 14B, demonstrates superhydrophobicity (contact angle of 150.25°), high sensitivity (0.916 at 1 kPa), and a low detection limit (0.2 Pa) [59].”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [59]
The MAPbBr3/polyvinylidene fluoride-TFSI composite sensor effectively monitored facial expressions, pulse, respiration, and finger bending.
“The MAPbBr 3 /polyvinylidene fluoride-TFSI composite sensor effectively monitored facial expressions, pulse, respiration, and finger bending.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [59]
Cites
Material approaches to stretchable strain sensors
Park, J., You, I., Shin, S., & Jeong, U. (2015) · ChemPhysChem · doi:10.1002/cphc.201402810 · Cited by 216 · see citing works
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Design Strategies and Emerging Applications of Perovskite-Based Sensors
Li, Y., Ding, Y., Sun, J., Tan, S., Li, Y., Wang, X., Cai, J., Bai, J., Lv, X., Guo, W., et al. (2025) · SmartMat · doi:10.1002/smm2.70022 · Cited by 41 · see citing works
Cutting-Edge Perovskite-Based Flexible Pressure Sensors Made Possible by Piezoelectric Innovation
Naz, A., Meng, Y., Luo, J., Khan, I. A., Abbas, R., Yu, S., & Wei, J. (2024) · Materials · doi:10.3390/ma17174196 · Cited by 14 · see citing works
- Authors
- Xuan, W., Fang, Y., Teng, S., Huang, S., Zou, L., Gao, S., Cheng, Y., & Zheng, L.
- Affiliations
- China University of Mining and Technology (CN)
- Corresponding author
- Zheng, Lina
- Venue
- Journal of Colloid and Interface Science
- Publisher
- Elsevier BV
- Published
- 2024-09
- Volume
- 669
- Pages
- 358-365
- ISSN
- 0021-9797 (ISSN-L)
- OpenAlex
- W4396608449
- Cited by
- 19
- References
- 1
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 8
- FWCI
- 2.09
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of Colloid and Interface Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Perovskite Materials and Applications
- Physical Sciences › Materials Science › Surfaces, Coatings and Films › Surface Modification and Superhydrophobicity
- Keywords
- piezoresistive pressure sensor, perovskite nanocrystals, MAPbBr3, polyvinylidene fluoride, [EMIM][TFSI], porous polymer films, in situ fabrication, flexible electronics, humidity stability, wind speed sensing, sensing mechanism
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