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Nanoscale self-assembly and water retention properties of silk fibroin-riboflavin hydrogel.
J Chem Phys
January 2025
Department of Systems and Computational Biology, School of Life Sciences, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad 500046, Telangana, India.
Silk-fibroin hydrogels have gained considerable attention in recent years for their versatile biomedical applications. The physical properties of a complex hydrogel, comprising silk fibroin and riboflavin, surpass those of the silk fibroin-hydrogel without additives. This study investigates silk fibroin-riboflavin (silk-RIB) hydrogel at the atomistic level to uncover molecular structures and chemical characteristics specific to silk fibroin and riboflavin molecules in an aqueous medium.
View Article and Find Full Text PDFA-site composition tuning in methylammonium-based metal halide perovskite colloidal nanocrystals.
Nanoscale
January 2025
Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad, 500007, India.
Utilizing the soft-lattice nature of metal halide perovskites, we employ post-synthetic cross-ion exchange to synthesize a series of narrow band-gap colloidal nanocrystals of methylammonium-based lead iodide solid solutions of composition FAMAPbI, as well as those of triple-cation composition CsFAMAPbI (TCPbI). The ability to finely tune the compositions not only helps in tailoring the optical properties in the near-infrared region, but also improves the stability of these colloidal nanocrystals towards moisture, which has been demonstrated as compared to their bulk counterparts. The thermal stability of these solid solutions is also comparable to that of the bulk, as evidenced by thermogravimetric studies.
View Article and Find Full Text PDFPoly(-Phenylene Benzobisoxazole) Nanofiber: A Promising Nanoscale Building Block Toward Extremely Harsh Conditions.
ACS Nano
January 2025
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, P. R. China.
Since the invention and commercialization of poly(-phenylene benzobisoxazole) (PBO) fibers, numerous breakthroughs in applications have been realized both in the military and aerospace industries, attributed to its superb properties. Particularly, PBO nanofibers (PNFs) not only retain the high performance of PBO fiber but also exhibit impressive nanofeatures and desirable processability, which have been extensively applied in extreme scenarios. However, no review has yet comprehensively summarized the preparation, applications, and prospective challenges of PNFs to the best of our knowledge.
View Article and Find Full Text PDFCrystallization control of Cu(I)-halide thermal evaporation for improving resistive switching memory performance.
Nanoscale
January 2025
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
CsCuI is considered a promising material for lead-free resistive switching (RS) memory devices due to its low operating voltage, high on/off ratio, and excellent thermal and environmental stability. However, conventional lead-free halide-based RS memory devices typically require solvent-based thin-film formation processes that involve toxic organic and acidic solvents, and the effects of process conditions on device performance are often not fully understood. This study investigates the effect of crystallinity on CsCuI-based RS memory devices fabricated thermal evaporation.
View Article and Find Full Text PDFDesigning highly tunable nanostructured peptide hydrogels using differential thermal histories to achieve variable cellular responses.
Nanoscale
January 2025
Institute of Nano Science and Technology, Mohali, Sector-81, Knowledge City, Sahibzada Ajit Singh Nagar, Punjab 140306, India.
In this study, we demonstrate a unique and promising approach to access peptide-based diverse nanostructures in a single gelator regime that is capable of exhibiting different surface topographies and variable physical properties, which, in turn, can effectively mimic the extracellular matrix (ECM) and regulate variable cellular responses. These diverse nanostructures represent different energy states in the free energy landscape, which have been created through different self-assembling pathways by providing variable energy inputs by simply altering the gelation induction temperature from 40 °C to 90 °C. The highly entangled network structure with long fibers was created by higher energy inputs, , inducing the gelation at a higher temperature in the 70-90 °C range, whereas the less entangled nanoscale network with short fibers was obtained at a lower gelation induction temperature of 40-60 °C.
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