纳米片
纳米花
二硫化钼
材料科学
钼
拉曼光谱
X射线光电子能谱
形态学(生物学)
傅里叶变换红外光谱
光热治疗
化学工程
水热合成
纳米结构
纳米技术
核化学
热液循环
物理
光学
工程类
冶金
生物
遗传学
作者
Marzieh Salimi,Mohammad Ali Shokrgozar,Delavari H Hamid,Manouchehr Vossoughi
标识
DOI:10.1016/j.materresbull.2022.111837
摘要
PEGylated MoS2 nanoflower (MoS2-NF) and nanosheet (MoS2-NS) are synthesized through a one-pot hydrothermal method as photo absorbing agent (PAA). It is found that employing different thiol precursors result in distinct morphologies. The products are structurally, chemically, and morphologically characterized. Electron microscopy demonstrates the formation of sheet and flower morphologies of MoS2. Fourier transform infrared (FTIR) and thermal gravimetric (TGA) analysis confirm the PEGylation of MoS2 nanostructures. Raman and X-ray photoelectron spectroscopy (XPS) confirm the formation of 1T/2H structure of both samples. MoS2-NS demonstrates higher NIR absorption than MoS2-NF with a mass extinction coefficient of 19.06 and 5.09 L/g.cm, respectively. The photothermal conversion efficiency (η) of MoS2-NF and MoS2-NS is 13.77% and 25.68%, respectively which can be due to the higher 1T to 2H ratio of MoS2-NS. Finally, MoS2-NS has significantly higher photo-to-heat conversion ability in comparison with MoS2-NF which makes it more suitable as PAA for photothermal therapy of tumors.
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