Hydrophilic bismuth sulfur nanoflower superstructures with an improved photothermal efficiency for ablation of cancer cells

摘要: Nanomaterials with intense near-infrared (NIR) absorption exhibit effective photon-to-thermal energy transfer capabilities and can generate heat to ablate cancer cells, thus playing a pivotal role in photothermal therapeutics. Herein, hydrophilic flower-like bismuth sulfur (Bi2S3) superstructures uniform size improved NIR were controllably synthesized via facile solvothermal procedure assisted by polyvinylpyrrolidone (PVP), which could adjust the product morphology. Induced an 808-nm laser, as-prepared Bi2S3 nanoflowers exhibited much higher conversion efficiency (64.3%) than that of nanobelts (36.5%) prepared absence PVP. This be attributed not only nanoflower assembled 3-dimensional crumpled-paper-like nanosheets serving as many laser-cavity mirrors reflectivity light but also amorphous structures lower band gap. Thus, achieve same temperature increase, concentration or laser power density greatly reduced when using compared nanobelts, makes them more favorable for use therapy due decreased toxicity. Furthermore, these effectively achieved ablation cells vitro vivo. These results supported promising agent paved approach exploit new agents efficiency.