@article {50050,
	title = {Polysulfone-based polymer carbon dot membrane for optical dissolved oxygen sensing application},
	journal = {Chemistry-An Asian Journal},
	volume = {21},
	year = {2026},
	month = {MAR},
	pages = {e70685},
	type = {Article},
	abstract = {<p>
	The precise monitoring of dissolved oxygen (DO) is essential across industrial, environmental, and biomedical applications. However, the state-of-the-art DO sensing methods often suffer from inherent limitations, which hinder their effectiveness for real-time and long-term DO monitoring. Optical DO sensing, despite its advantages, utilizes expensive metal complexes and is prone to photobleaching and slow response time. Here, we introduce a novel polymer carbon dot (PCD) as a promising candidate for lifetime-based optical DO sensing. The PCD is a metal-free, nontoxic, fluorescent, long decay-lifetime material that is synthesized through hydrothermal method. Our fluorescent PCD exhibits high emission quantum yield (24.32\%), long decay-lifetime (10.43 \&amp; micro;s), and a linear response to DO concentrations ranging from 0.7 to 12.7 mg/L, with a Stern-Volmer constant of 0.1115. Further, to obtain better oxygen diffusion, high porosity, optical transparency, and high flexibility, PCD was embedded into a polysulfone matrix (PSF_PCD). The PSF_PCD membrane shows better results for the decay lifetime (9.4 \&amp; micro;s), surface energy (40.26 mN/m), and average pore diameter of 5 nm. Hence, the obtained results demonstrate the applicability of the PCD in optical DO sensors for real-time and long-term monitoring of DO levels.</p>
},
	keywords = {decay lifetime, dissolved oxygen, Hydrothermal method, polymer carbon dots, polysulfone-based membrane},
	issn = {1861-4728},
	doi = {10.1002/asia.70685},
	author = {Kadam, Rutuja and Hattale, Gangadhar and Virole, Vishal and Pal, Sanjivani and Abraham, Athira and Paul, Aditya and Kumar, Ajay and Shevate, Rahul and Banpurkar, Arun and Kanawade, Rajesh and Saha, Avishek}
}
