外文题目: Covalent Modification of MoS2 with Poly(N-vinylcarbazole) for Solid-State Broadband Optical Limiters
作者: Cheng, Hongxia; Dong, Ningning; Bai, Ting; Song, Yi; Wang, Jun; Qin, Yuanhao; Zhang, Bin; Chen, Yu
刊名: Chem.-Eur. J.
年: 2016 卷: 22 期: 13 页： 4500--4507
英文关键词:
molybdenum; nanostructures; nonlinear optics; polymers; sulfur
METAL DICHALCOGENIDE NANOSHEETS; FRAGMENTATION CHAIN TRANSFER; LIMITING PROPERTIES; RADICAL POLYMERIZATION; SATURABLE ABSORPTION; EXFOLIATED MOS2; PHOTOLUMINESCENCE; SEMICONDUCTORS; NANOCOMPOSITES; ABSORBER
英文摘要:
New soluble MoS2 nanosheets covalently functionalized with poly(N-vinylcarbazole) (MoS2-PVK) were in situ synthesized for the first time. In contrast to MoS2 and MoS2/PVK blends, both the solution of MoS2-PVK in DMF and MoS2-PVK/poly(methyl methacrylate) (PMMA) film show superior nonlinear optical and optical limiting responses. The MoS2-PVK/PMMA film shows the largest nonlinear coefficients ((eff)) of about 917cmGW(-1) at =532nm (cf. 100.69cmGW(-1) for MoS2/PMMA and 125.12cmGW(-1) for MoS2/PVK/PMMA) and about 461cmGW(-1) at =1064nm (cf. -48.92cmGW(-1) for MoS2/PMMA and 147.56cmGW(-1) for MoS2/PVK/PMMA). A larger optical limiting effect, with thresholds of about 0.3GWcm(-2) at =532nm and about 0.5GWcm(-2) at =1064nm, was also achieved from the MoS2-PVK/PMMA film. These values are among the highest reported for MoS2-based nonlinear optical materials. These results show that covalent functionalization of MoS2 with polymers is an effective way to improve nonlinear optical responses for efficient optical limiting devices.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1002/chem.201505017


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