Cryo-assisted exfoliation of atomically thin 2D Sb₂Se₃ nanosheets for photo-induced theranostics

Abstract

A cryo-assisted liquid exfoliation approach was developed to prepare atomically thin Sb2Se3 colloidal nanosheets for simultaneous photoacoustic imaging and photothermal therapy.

Tiny 2D silicon quantum sheets: a brain photonic nanoagent for orthotopic glioma theranostics

“…The obtained Si particles are composed of spontaneously stacked silicon sheets due to the delithiation-induced mismatch stress during the chemical delithiation process [32]. Then, layered Si particles were immersed into liquid nitrogen to regulate their mechanical properties at an extremely low temperature, aiming to improve the exfoliation efficiency during the following sonication [34,35].…”

2D Materials Based on Main Group Element Compounds: Phases, Synthesis, Characterization, and Applications

“…Orthorhombic Sb 2 Se 3 nanosheets were grown by liquid-phase exfoliation with the help of freezing. [282][283][284] There are two strategies for the freezing process: slow freezing with gentle sonication and fast freezing with vigorous sonication. In the slow freezing process, water is first pumped into interribbon voids with the help of shearing stress.…”

“…The subsequent sonication can effectively exfoliate the layer structures. [284] Surface modification of PVP enables the development of Sb 2 Se 3 nanosheets with high biocompatibility and therapeutic biosafety for in vitro and in vivo applications such as photothermal therapy, antibacterial infections, and photoacoustic imaging. [283][284][285] A 2D amorphous Sb 2 Se 3 /C composite was prepared using a simple ball-milling process.…”

“…[284] Surface modification of PVP enables the development of Sb 2 Se 3 nanosheets with high biocompatibility and therapeutic biosafety for in vitro and in vivo applications such as photothermal therapy, antibacterial infections, and photoacoustic imaging. [283][284][285] A 2D amorphous Sb 2 Se 3 /C composite was prepared using a simple ball-milling process. [286] As an anode for Li-and Na-ion batteries, this material exhibited remarkable electrochemical capabilities such as high reversible capacities, long cycle life, and high rate capabilities.…”

“…[ 309 ] At the early stage of its predicted 2D form, the hexagonal phase is stable with a honeycomb structure. [ 284 ] A theoretical study showed that a few‐layer h‐GaN became unstable and spontaneously reconstructed into a 3D structure with hexagonal in‐plane albeit covalent interlayer bonds that form alternating octagonal and square rings. [ 310 ] An indirect‐to‐direct transformation was observed during the reconstruction.…”