层状二硫化钛纳米片的合成及光热效应

Controllable synthesis and photothermal effect of two-dimensional layered titanium disulfide nanosheets

近年来,具有层状结构的二维材料由于其独特的物理、化学性质而受到广泛的关注.采用高温溶液法获得了厚度可控的层状二硫化钛纳米片.所获得的二硫化钛纳米片在厚度方向只有几个原子层厚度,是一种超薄的二维层状纳米结构.和常规具有光热效应对的银纳米颗粒相比较,二维层状二硫化钛纳米片显示出更加优异的光热性能.研究结果显示浓度为500μg/mL的TiS 2纳米片水溶液在波长为808 nm、激光功率密度为1 W/cm 2的红外激光照射下温度可升高至54.41℃,并且光热稳定性良好.通过理论计算,得到其光热转换效率为42.14%.研究表明二维层状二硫化钛纳米片是一种非常好的光热材料,对于光热治疗的应用方面具有潜在的价值.

In recent years,two-dimensional layered materials have attracted extensive attention due to their unique physical and chemical properties.In this paper,a solution method is utilized to obtain ultra-thin two-dimensional layered titanium disulfide nanosheets(NSs)with controlled thickness.The obtained titanium disulfide NSs show a few atomic layers in the thickness.Moreover,the TiS 2 NSs exhibit excellent photothermal performance compared to conventional photothermal silver nanoparticles.Our results show that the temperature of the TiS 2 NSs aqueous solution(500μg/mL)can be increased to 54.41℃under the irradiation of infrared 808 nm laser with a power density of 1 W/cm 2,and its photothermal stability is excellent.Through theoretical calculation,the photothermal conversion efficiency is 42.14%.This study shows that two-dimensional layered TiS 2 NSs is a promise photothermal material,which has potential application value for the treatment of cancer.