Observation of Rotated-Oriented Attachment during the Growth of Ag2S Nanorods under Mediation of Protein

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• 作者：Lin Yang ; Huayan Yang ; Zongxian Yang ; Yanxia Cao ; Xiaoming Ma ; Zhansheng Lu ; Zhi Zheng
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：August 14, 2008
• 年：2008
• 卷：112
• 期：32
• 页码：9795-9801
• 全文大小：552K
• 年卷期：v.112,no.32(August 14, 2008)
• ISSN：1520-5207

文摘

In this study, protein-conjugated Ag₂S nanorods were prepared in aqueous solution, and high-resolution transmission electron microscopy (HRTEM) was used to track the whole process of the nanorod growth. Our results shew that the final products were formed via two-step oriented attachment, that is, particle−particle and rod−rod oriented. More interestingly, before oriented attachment, the nanoparticles or nanorods attached without sharing the same lattice plane; they could then rotate to a perfect array and fuse together by eliminating the two high energy surfaces. On the basis of the calculation of surface energy, two-step attachments and rotations were brought forward, and the role of protein in the forming process of nanorods was discussed.