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ADVANCED MATERIALS · 2013 ·Vol. 25 ·期 32 ·4397-4402 · IF 14.829

Broadband Optical Non-linearity Induced by Charge-Transfer Excitons in Type-II CdSe/ZnTe Nanocrystals

Yunlong Liu,Chunfeng Zhang,Huichao Zhang,Rui Wang,Zheng Hua,Xiaoyong Wang,Jiayu Zhang,Min Xiao

Graphical Benefiting from excitonic charge-transfer states, an efficient non-linear optical response is observed in type-II nanocrystals by four-wave mixing when the incident photon energy lies below the bandgaps of constituent semiconductors. The non-linear optical properties in nanocrystals can be manipulated by the band alignment of the core–shell components, which serves as a promising platform to design broadband non-linear optical devices.

研究领域: 纳米光子学 · 材料科学 · 凝聚态物理 · 光学工程 · 半导体物理学

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JOURNAL OF MATERIALS CHEMISTRY · 2012 ·Vol. 22 ·期 48 ·25019-25026 · IF 5.968

Microwave-assisted crystallization inclusion of spiropyran molecules in indium trimesate films with antidromic reversible photochromism

Feng Zhang,Xiaoqin Zou,Wei Feng,Xiaojun Zhao,Xiaofei Jing,Fuxing Sun,Hao Ren,Guangshan Zhu

An indium trimesate metal–organic framework (JUC-120) which possesses a cubic zeolitic MTN topology, as a new analogue to MIL-100(Al, Fe or Cr) compounds, has been successfully synthesized. Its structure exhibits a mesoporous cage (26 Å) and high thermal stability. The assembly of nitrobenzospiropyran derivatives (BSP) into JUC-120 nanocrystals (BSP/JUC-120) is achieved by a microwave-assisted crystallization inclusion approach. The BSP/JUC-120 films have been prepared on quartz wafers by a spin-coating method. The successful encapsulation of BSP molecules into the mesopores of the JUC-120 structure has been verified by N2 adsorption and TGA measurements. The photochromic properties of BSP/JUC-120 films are studied by the UV-Vis and fluorescence spectroscopies. More interestingly, metastable open merocyanine (OMC) species are directly generated from the closed spiropyran form (CSP) without photoirradiation and stabilized for a long period in the BSP/JUC-120 film. The open merocyanine isomer bleaches to the closed spiropyran form by ultraviolet or visible light, and the coloration is regained upon standing in the dark, exhibiting antidromic photochromism. Moreover, the BSP/JUC-120 film shows high reversibility and thermal stability of photochromism. This highly efficient MOF film is expected to be promising in the applications of optical devices.

研究领域: 材料科学 · 光化学 · 纳米技术 · 金属有机框架（MOFs） · 光学器件

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Journal of Nanomaterials · 2017 ·Vol. 2017 ·期 1 ·4301768 · IF 1.871

Influence of Heat Treatment on the Morphologies of Copper Nanoparticles Based Films by a Spin Coating Method

Wei Liu,Jiayu Guo,Zhonghua Fan,Xiaorong Wang,Dingkun Yu,Rong Chen,Shisheng Huang,Peng He

We have investigated the influence of heat treatment on the morphologies of copper nanoparticles based films on glass slides by a spin coating method. The experiments show that heat treatment can modify the sizes and morphologies of copper nanoparticles based films on glass slides. We suggest that through changing the parameters of heat treatment process may be helpful to vary the scattering and absorbing intensity of copper nanoparticles when used in energy harvesting/conversion and optical devices.

研究领域: 纳米材料 · 材料科学 · 光学器件 · 能量收集

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Broadband Optical Non-linearity Induced by Charge-Transfer Excitons in Type-II CdSe/ZnTe Nanocrystals

Microwave-assisted crystallization inclusion of spiropyran molecules in indium trimesate films with antidromic reversible photochromism

Influence of Heat Treatment on the Morphologies of Copper Nanoparticles Based Films by a Spin Coating Method