Interlayer Incorporation of A-Elements into MXenes Via Selective Etching of A' from MA'A″C MAX Phases.

MXenes are a large family of two-dimensional materials with a general formula MXT, where M is a transition metal, X = C and/or N, and T represents surface functional groups. MXenes are synthesized by etching A-elements from layered MAX phases with a composition of MAX. As over 20 different chemical elements were shown to form A-layers in various MAX phases, we propose that they can provide an abundant source of very diverse MXene-based materials.

Laser Thermo-Photobiomodulation of Bone Marrow Mesenchymal Stem Cells.

We studied the effect of laser radiation of moderate intensity with a wavelength of 970 nm on the efficiency of colony formation of rat bone marrow mesenchymal stem cells (MSC) in vitro. In this case, photobimodulation and thermal heating of MSC occur simultaneously. This combined laser treatment allows increasing the number of colonies by 6 times in comparison with the control and by more than 3 times in comparison with thermal heating alone.

High-yield fabrication of electromechanical devices based on suspended TiCT MXene monolayers.

MXenes, two-dimensional transition metal carbides, nitrides, and carbonitrides, are known for their exceptional electronic and mechanical properties. Yet, the experimental efforts toward the realization of MXene-based nanoelectromechanical systems (NEMS) combining electrical and mechanical functionalities of MXenes at the nanoscale remain very limited. Here, we demonstrate a high-yield fabrication of the electromechanical devices based on individual suspended monolayer MXene flakes.

Negative photoresponse in TiCT MXene monolayers.

Two-dimensional transition metal carbides, nitrides, and carbonitrides, collectively known as MXenes, are finding numerous applications in many different areas, including optoelectronics and photonics, but there is limited information about their intrinsic photoresponse. In this study, we investigated the visible and near-infrared range photoresponse of TiCT , the most popular MXene material to date. The electrical measurements were performed on devices based on individual monolayer TiCT MXene flakes, which were characterized by a variety of microscopic and spectroscopic methods.

Comparative Morphological Study of the Formation of Reparative Regenerate during Skin Wound Healing in Rats under the Effect of Drugs and Bone Marrow.

We studied the formation of the reparative regenerate of the skin wound in rats under the effect of drug products based on keratan and secretome of bone marrow mesenchymal stem cells (MSC), as well as bone marrow cells (native and exposed to laser radiation with a wavelength of 1.56 μm). Due to the biological affinity for the dermal tissue, keratan preparations being applied to the skin stimulate regeneration of the wound defect.