Optical Fiber Sensor with Dynamically Responsive Cladding for Real-Time Breath Pattern Monitoring Rapid and real-time monitoring of humidity changes is critical, as they impact human health, material storage, and stability, industrial fabrication, microbial transmission, and agriculture. In recent...

We demonstrate rapid and real-time monitoring of breath humidity and pattern using a low-cost, robust, and non-invasive technology, which opens new opportunities for long-term respiratory health monitoring and next-generation healthcare devices. @acs.org pubs.acs.org/doi/10.1021/...

Biopolymer Optical Fibers for High-Sensitivity Quantitative Humidity Monitoring Because of their tunable refractive index and surface functionalities, biopolymers have emerged as excellent candidates for the fabrication of sustainable optical fibers. To date, the focus has been on identifying suitable biopolymers for optical fiber fabrication and their associated waveguiding properties. Despite a few studies showing their potential for short-distance applications and humidity sensing, the quantitative sensing of environmental parameters using biopolymer optical fibers has not been reported. Herein, for the first time, we report the quantitative determination of relative humidity (RH) across the visible and near-infrared region of the electromagnetic spectra using fully biopolymer optical fibers. Specifically, we demonstrate that methylcellulose and methylcellulose-alginate composite optical fibers exhibit sensitivity of up to 0.33 dB/%RH. Notably, the sensitivity of our fibers is equal to or greater than most of the optical sensors reported in recent literature and exceeds the reported values for capacitance-based humidity sensors. The sensitivity, response time, and dynamic range can be readily tuned by changing the fiber composition and coagulation methods, with ethanol coagulated composite fibers displaying a 6-fold increase in sensitivity compared to ionically coagulated composite fibers. Our results suggest that the humidity sensing properties of fiber sensors are insensitive to temperature changes. Dynamic Vapor Sorption analysis reveals that the fiber composition regulates the sorption–desorption kinetics, thereby affecting the humidity sensing behavior. The fully biopolymer optical fibers open a new avenue for sustainable sensors that enable the quantitative sensing of environmental parameters for condition monitoring applications.

We present the first demonstration of quantitative sensing using fully bio-based optical fibers with sensitivity surpassing conventional capacitance sensors. @acs.org technologies.https://pubs.acs.org/doi/10.1021/acsami.5c10056

In our recent Perspective article @daltontrans.rsc.org @rsc.org we explore innovative approaches for fabricating precision 2D materials across length scales. The cover art depicts the 2D flexible membranes fabricated at the air-water interface. pubs.rsc.org/en/content/a...

Dalton Transactions outside front cover for vol 54, issue 31.

Dalton Transactions outside back cover for vol 54, issue 31.

Issue 31 is now online and ready to read👀

pubs.rsc.org/en/journals/...

Dalton Transactions outside front cover for vol 54, issue 31.

🔓On this week's front cover is #OpenAccess Perspective by Venishaa Sethumadhavan & Nonappa discussing fabrication approaches for self-assembled gold and silver nanocluster-based films, 2D nanosheets, colloidal crystals and macroscopic membranes👀

pubs.rsc.org/en/content/a...

📍Tampere University 🧪

Hello BlueSky community 👋 You can now find us
@daltontrans.rsc.org

Join the Dalton Transactions conversation for high quality, original research in inorganic and organometallic chemistry #ChemSky

Atomically precise noble metal nanoclusters for engineering self-assembled two-dimensional materials Two-dimensional nanomaterials derived from noble metals exhibit unique optoelectronic properties with potential applications in advanced nanodevices, catalysis, imaging, biomedicine, and sensing. Over...

We present self-assembly principles, applications, and challenges in nanocluster-based two-dimensional materials. #2Dmaterials #nanoparticles #nanoscience pubs.rsc.org/en/content/a... @rsc.org

Brilliant demonstration of atomically precise nanocluster-based light emitting diodes (LED) fabrication without any additional host materials. Congratulations to Shibu and team @wiley.com advanced.onlinelibrary.wiley.com/doi/full/10....

Happy New Year 2025 YouTube video by Prof. Nonappa

From winter wonderland: Wishing everyone a very happy and successful new year 2025🎉🎉🎉

youtu.be/F8BNQrawWaA?...