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Preparation of Ultrathin Two‐Dimensional Ti x Ta 1− x S y O z Nanosheets as Highly Efficient Photothermal Agents
Author(s) -
Tan Chaoliang,
Zhao Lingzhi,
Yu Peng,
Huang Ying,
Chen Bo,
Lai Zhuangchai,
Qi Xiaoying,
Goh Min Hao,
Zhang Xiao,
Han Shikui,
Wu XueJun,
Liu Zheng,
Zhao Yanli,
Zhang Hua
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201703597
Subject(s) - nanosheet , materials science , oxide , sulfide , graphene , metal , yield (engineering) , absorbance , hybrid material , quantum yield , nanomaterials , chemical engineering , nuclear chemistry , inorganic chemistry , nanotechnology , chemistry , metallurgy , chromatography , engineering , physics , quantum mechanics , fluorescence
Although two‐dimensional (2D) metal oxide/sulfide hybrid nanostructures have been synthesized, the facile preparation of ultrathin 2D nanosheets in high yield still remains a challenge. Herein, we report the first high‐yield preparation of solution‐processed ultrathin 2D metal oxide/sulfide hybrid nanosheets, that is, Ti x Ta 1− x S y O z ( x =0.71, 0.49, and 0.30), from Ti x Ta 1− x S 2 precursors. The nanosheet exhibits strong absorbance in the near‐infrared region, giving a large extinction coefficient of 54.1 L g −1 cm −1 at 808 nm, and a high photothermal conversion efficiency of 39.2 %. After modification with lipoic acid‐conjugated polyethylene glycol, the nanosheet is a suitable photothermal agent for treatment of cancer cells under 808 nm laser irradiation. This work provides a facile and general method for the preparation of 2D metal oxide/sulfide hybrid nanosheets.