@article{https://doi.org/10.1002/adma.202409248,

title = {Long-Range Proton Channels Constructed via Hierarchical Peptide Self-Assembly},

author = {Semion Censor and Jorge Vega Martin and Ohad Silberbush and Samala Murali Mohan Reddy and Ran Zalk and Lonia Friedlander and Daniel G. Trabada and Jesús Mendieta and Guillaume Le Saux and Jesús Ignacio Mendieta Moreno and Linda Angela Zotti and José Ortega Mateo and Nurit Ashkenasy},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202409248},

doi = {https://doi.org/10.1002/adma.202409248},

year  = {2024},

date = {2024-11-12},

journal = {Advanced Materials},

volume = {n/a},

number = {n/a},

pages = {2409248},

abstract = {Abstract The quest to understand and mimic proton translocation mechanisms in natural channels has driven the development of peptide-based artificial channels facilitating efficient proton transport across nanometric membranes. It is demonstrated here that hierarchical peptide self-assembly can form micrometers-long proton nanochannels. The fourfold symmetrical peptide design leverages intermolecular aromatic interactions to align self-assembled cyclic peptide nanotubes, creating hydrophilic nanochannels between them. Titratable amino acid sidechains are positioned adjacent to each other within the channels, enabling the formation of hydrogen-bonded chains upon hydration, and facilitating efficient proton transport. Moreover, these chains are enriched with protons and water molecules by interacting with immobile counter ions introduced into the channels, increasing proton flow density and rate. This system maintains proton transfer rates closely resembling those in natural protein channels over micrometer distances. The functional behavior of these inherently recyclable and biocompatible systems opens the door for their exploitation in diverse applications in energy storage and conversion, biomedicine, and bioelectronics.},

keywords = {Dissipation, molecular dynamic simulations, openQCM Q-1, peptides, proton channels, proton transport, QCM-D, Quartz Crystal Microbalance, self-assembly},

pubstate = {published},

tppubtype = {article}

}

@article{malhotra2023room,

title = {Room-temperature monitoring of CH4 and CO2 using a metal-organic framework-based QCM sensor showing inherent analyte discrimination},

author = {Jaskaran Singh Malhotra and Mariusz Kubus and Kasper Steen Pedersen and Simon Ivar Andersen and Jonas Sundberg},

url = {https://chemrxiv.org/engage/chemrxiv/article-details/646b938eccabde9f6e2fd280},

doi = {https://doi.org/10.26434/chemrxiv-2023-djhp2},

year  = {2023},

date = {2023-05-24},

urldate = {2023-05-24},

abstract = {The detection of methane and carbon dioxide is of growing importance due to their negative impact on global warming. This is true both for environmental monitoring, as well as leak detection in industrial processes. Although solid-state sensors are technologically mature, they have limitations that prohibit their use in certain situations, e.g., explosive atmospheres. Thus, there is a need to develop new types of sensor materials. Herein, we demonstrate a simple, low-cost metal-organic framework-based gas leak detection sensor. The system is based on gravimetric sensing using a quartz crystal microbalance. The quartz crystal is functionalized by layer-by-layer growth of a thin metal-organic framework film. This film shows selective uptake of methane or carbon dioxide under atmospheric conditions. The hardware has low cost, simple operation, and theoretically high sensitivity. Overall, the sensor is characterized by simplicity and high robustness. Furthermore, by exploiting the different adsorption kinetics as measured by multiple harmonics analyses, it is possible to discriminate whether the response is due to methane or carbon dioxide. In summary, we demonstrate data relevant towards new applications of metal-organic frameworks and microporous hybrid materials in sensing applications.},

keywords = {carbon dioxide, CH4, CO2, Dissipation, metal-organic frameworks, methane, openQCM NEXT, QCM, QCM-D, Quartz Crystal Microbalance, sensors},

pubstate = {published},

tppubtype = {article}

}