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万兴元,王一雍,金辉,宁哲,邵品.聚乙烯吡咯烷酮对亚微米级铜晶体的形貌控制机制[J].稀有金属材料与工程(英文),2019,48(12):3969~3977.[Xingyuan Wan,Yiyong Wang,Hui Jin,Zhe Ning and Pin Shao.Morphology Control Mechanism of Polyvinylpyrrolidone on Submicron Copper Crystals[J].Rare Metal Materials and Engineering,2019,48(12):3969~3977.]
Morphology Control Mechanism of Polyvinylpyrrolidone on Submicron Copper Crystals
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Received:September 13, 2018  Revised:March 28, 2019
DOI:
Key words: PVP  Gibbs-Wulff
Foundation item:国家自然科学基金资助(项目号51674141)省教育厅项目资助(2016TSPY02)
Author NameAffiliation
Xingyuan Wan,Yiyong Wang,Hui Jin,Zhe Ning and Pin Shao  
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Abstract:
      The morphology of submicron copper crystals was controlled by polyvinylpyrrolidone (PVP). The microscopic properties of copper crystals were characterized by SEM, XRD and laser particle size analyzer. The Materials Studio was used to combine Gibbs-Wulff"s law (crystal growth balance theory). It is speculated that the adsorption behavior of PVP molecules on the crystal faces of Cu and the morphology of copper crystals show that the copper crystals are transformed from truncated octahedron to nearly spherical after PVP modification. PVP mainly undergoes chemisorption on the crystal faces of copper. The order of adsorption is: (111)>(200)>(220). The morphology control mechanism of PVP on submicron copper crystals is that PVP forms a covalently unstable coordinating chelate with Cu, inhibiting the growth of (111), (200) and (220) crystal planes, revealing more crystal planes result in the Cu crystals becoming closer to a sphere.