@article{maharani2026high,

title = {High-performance formic acid gas detection using a quartz crystal microbalance functionalized with Cdot-decorated polyvinyl acetate nanofibers},

author = {Chlara Naren Maharani and Henny Afiyanti and Firdausya Danuansa and Ihsan Nurijal and Roto Roto and Aditya Rianjanu and Kuwat Triyana and Witha Berlian Kesuma Putri and Rizky Aflaha},

url = {https://pubs.rsc.org/en/content/articlelanding/2026/an/d6an00209a/unauth#!divAbstract},

doi = {https://doi.org/10.1039/D6AN00209A},

year  = {2026},

date = {2026-05-13},

urldate = {2026-05-13},

journal = {Analyst},

publisher = {Royal Society of Chemistry},

abstract = {Formic acid is an organic compound that can be harmful and toxic to human health. Thus, accurate detection of its concentration in the air is crucial. Therefore, this study aims to develop a formic acid gas sensor based on a quartz crystal microbalance (QCM) with an active layer of polyvinyl acetate (PVAc) nanofibers and carbon dots (Cdots). Tests using the sensor show that the addition of Cdots significantly improves its performance. The sensitivity of the sensor with a PVAc nanofiber active layer was 0.126 Hz ppm−1, while after the addition of Cdots, the sensor's sensitivity could reach 2.552 Hz ppm−1, an increase of 20 times. The fabricated sensor also has high selectivity toward formic acid compared to other analytes. Additionally, the response and recovery times of the sensor were found to be 27 and 63 seconds, respectively. Also, the fabricated sensors show high stability under 29 days of testing. Therefore, the fabricated QCM-based sensor using Cdots as an active layer could be a promising candidate for the development of an effective and sensitive formic acid gas sensor.},

keywords = {Cdot-decorated polyvinyl acetate nanofibers, formic acid, gas sensor, Nanofibers, openQCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}

@article{KATRIANI2026109541,

title = {Rapid response and high-enhancement sensitivity formic acid gas sensor based on electrospun polyimide/polyvinylpyrrolidone composite nanofibers},

author = {Laila Katriani and Salsabila Mei Cahyani and Adha Nur Rahman Fauzi and Henny Afiyanti and Chlara Naren Maharani and Kuwat Triyana and Rizky Aflaha},

url = {https://www.sciencedirect.com/science/article/pii/S2468023026011259},

doi = {https://doi.org/10.1016/j.surfin.2026.109541},

issn = {2468-0230},

year  = {2026},

date = {2026-05-08},

urldate = {2026-01-01},

journal = {Surfaces and Interfaces},

pages = {109541},

abstract = {Formic acid gas is a volatile compound that is widely used in various industrial processes and has the potential to cause health and environmental impacts when exposed to concentrations of more than 30 ppm. Therefore, the development of gas sensors that are sensitive, selective, and capable of operating at room temperature is an important requirement. In this study, a formic acid gas sensor based on quartz crystal microbalance (QCM) with an active layer of polyimide/polyvinylpyrrolidone (PI/PVP) composite nanofibers was developed. PI/PVP nanofibers were synthesized using the electrospinning method. Test results show that the addition of PVP to the PI matrix improves the sensor's performance in detecting formic acid gas, with a sensitivity reaching 0.389 Hz·ppm-1. Remarkably, the fabricated sensor demonstrated enhanced linearity with an exceptional coefficient of correlation (R2 = 0.986) within a wide range of 10 – 300 ppm. Furthermore, the fabricated sensor exhibited a rapid response time of 7 s, showcasing its efficiency compared to conventional polymer-based sensors. The fabricated sensor also shows repeatability and reversibility that do not change significantly after three cycles, as well as stability for 2 weeks. The decrease in frequency due to the response to formic acid was dominated by hydrogen bonding interactions between the carbonyl groups in PVP and formic acid gas molecules. With its fairly good detection capability, this PI/PVP nanofiber-coated QCM sensor shows promising potential for real-time formic acid gas monitoring applications in industrial and laboratory environments.},

keywords = {formic acid, gas sensor, Nanofiber, openQCM, PI, PVP, QCM, Quartz Crystal Microbalance},

pubstate = {published},

tppubtype = {article}

}