CHEMISTRY OF MATERIALS
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2018
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IF 9.89
Xin Ye,Yang Liu,Quanxiang Han,Chao Ge,Shuangyue Cui,Leilei Zhang,Xiaoxin Zheng,Guangfeng Liu,Jie Liu,Duo Liu,Xutang Tao
Organic single crystals manifest the intrinsic physical properties of materials. However, traditional growth of organic single crystals is limited by low solubility from solutions or complexity from physical vapor deposition. Here we report a new method to grow organic single crystals by microspacing in-air sublimation, which avoids costly vacuum system and time-consuming procedures and is practical for a wide range of organic crystals. In situ crystal growth observation revealed an unprecedented vapor-to-melt-to-crystal mechanism, resulting from the micrometer scale spacing distance between the source and the growth position. FET devices based on the rubrene crystals directly grown on Si/SiO2 substrate exhibited higher mobility than the best record using SiO2 as the gate dielectric. This effective organic crystal growth technique can be affordable and handled for almost every lab, which may be beneficial for future research and application of organic crystals.
研究领域:
材料科学
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有机电子学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2020
·Vol. 32
·期 32
·2003146
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IF 27.398
Xin Feng,Zongdong Sun,Ke Pei,Wei Han,Fakun Wang,Peng Luo,Jianwei Su,Nian Zuo,Guiheng Liu,Huiqiao Li,Tianyou Zhai
2D inorganic bimolecular crystals, consisting of two different inorganic molecules, are expected to possess novel physical and chemical properties due to the synergistic effect of the individual components. However, 2D inorganic bimolecular crystals remain unexploited because of the difficulties in preparation arising from non-typical layered structures and intricate intermolecular interactions. Here, the synthesis of 2D inorganic bimolecular crystal SbI 3 ·3S 8 nanobelts via a facile vertical microspacing sublimation strategy is reported. The as-synthesized SbI 3 ·3S 8 nanobelts exhibit strong in-plane anisotropy of phonon vibrations and intramolecular vibrations as well as show anisotropic light absorption with a high dichroism ratio of 3.9. Furthermore, it is revealed that the second harmonic generation intensity of SbI 3 ·3S 8 nanobelts is highly dependent on the excitation wavelength and crystallographic orientation. This work can inspire the growth of more 2D inorganic bimolecular crystals and excite potential applications for bimolecular optoelectronic devices.
研究领域:
材料科学
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凝聚态物理
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纳米光学
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非线性光学
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晶体工程
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
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2022
·
IF 6.959
Qing Guo,Xin Ye,Leilei Zhang,Qinglian Lin,Cuicui Li,Quanxiang Han,Xiaoxin Zheng,Jinke Jiang,Huamiao Zhang,Yang Liu,Xutang Tao
The formation process of hybrid perovskites affects the morphology, performance, and stability of the materials to a large extent. This work takes the preparation of a prototypical perovskite, methylammonium lead iodide (MAPbI3) from vapor conversion to illustrate the effect of reaction conditions. First, we applied our recently invented microspacing in-air sublimation (MAS) to grow PbI2 crystals with thicknesses ranging from several to hundreds of nanometers. The PbI2 single crystals were employed to investigate the conversion to MAPbI3. This proved that vapor conversion is indeed a single-crystalline-to-polycrystalline process, following a deconstruction–reconstruction mechanism. Both the crystal thickness and activation temperature greatly affect the revolution, while the morphology of the formed perovskite is dictated by the thickness of the precursor crystal. Clarification of the intrinsic and exerted factors on the conversion process is conducive to a deep understanding of the perovskite formation process.
研究领域:
材料科学
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化学
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纳米技术
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太阳能
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2022
·
IF 3.898
Yiqing Chen,Xin Huang,Suping Ding,Yaoguang Feng,Na Wang,Hongxun Hao
The precise control of active pharmaceutical ingredient (API) crystal nucleation and polymorphism is a key consideration in pharmaceutical manufacturing. In this study, tunable nanoparticles were developed to regulate the nucleation process of coumarin . Magnetic silica nanoparticles with four different functional groups ( NH 2 , COOH, SH, NCO) were prepared and coated on the substrate for inducing the crystallization of coumarin. Confined melt crystallization and microspacing sublimation crystallization methods were used to investigate the regulation mechanism. The results indicated that three metastable forms of coumarin can be obtained as pure components based on the combined influence of crystallization methods and functionalized nanoparticles. Form II could be selectively obtained by microspacing sublimation crystallization on Fe 3 O 4 @SiO 2 SH substrates, and Form IV could be obtained by confined melt crystallization on Fe 3 O 4 @SiO 2 NCO substrates. Form III could be obtained by further heating Form IV crystals to 52 °C on Fe 3 O 4 @SiO 2 NCO substrates. Moreover, the polarized light microscopy results also indicated that the introduction of nanoparticles could also increase the stability of the metastable crystalline forms of coumarin. Finally, the diffusion and surface dynamics during nanoparticle induced crystallization were comparatively investigated and the corresponding polymorphic selectivity mechanism was proposed.
研究领域:
药学
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材料科学
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纳米技术
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）