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Temperature-Induced Interfacial Change in Au@SiO2 Core-Shell Nanoparticles Detected by Extended X-ray Absorption Fine Structure
Zhang KH(张坤浩); Wang W(王维); Cheng WD(程伟东); Xing XQ(邢雪青); Mo G(默广); Cai Q(蔡泉); Chen ZJ(陈中军); Wu ZH(吴忠华); Zhang, KH; Wang, W; Cheng, WD; Xing, XQ; Mo, G; Cai, Q; Chen, ZJ; Wu, ZH
2010
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
Volume114Issue:1Pages:#REF!
Corresponding AuthorWu, ZH (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
SubtypeArticle
AbstractCore-shell nanoparticles were widely studied because of their potential application. However, there are few reports about the interfacial structure and its stability. In this paper, Au@SiO2 nanoparticles have been synthesized by using the traditional sol-gel method. In situ extended X-ray absorption fine structure technique was used to characterize the structural change with temperature. It is found that the interfacial bonding between the Au core and the silica shell has changed from a Au-N bond to a Au-Si bond when the temperature is above 600 degrees C. The Au-silica interface with Au-Si bonds between the Au core and silica shell can be stably existed in the temperature range of 600 to 1000 degrees C. The mechanism of bond change is described. The thermal expansion coefficient of Au nanoparticles in the Au@SiO2 core-shell system is obtained to be 1.4 x 10(-5) K-1, which is almost the same with Au bulk. The details of the structural changes and thermal expansion behavior are discussed in this paper.
Subject AreaChemistry; Science & Technology - Other Topics; Materials Science
DOI10.1021/jp907815b
Indexed BySCI
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000273268600007
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/225692
Collection多学科研究中心
Recommended Citation
GB/T 7714
Zhang KH,Wang W,Cheng WD,et al. Temperature-Induced Interfacial Change in Au@SiO2 Core-Shell Nanoparticles Detected by Extended X-ray Absorption Fine Structure[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(1):#REF!.
APA 张坤浩.,王维.,程伟东.,邢雪青.,默广.,...&Wu, ZH.(2010).Temperature-Induced Interfacial Change in Au@SiO2 Core-Shell Nanoparticles Detected by Extended X-ray Absorption Fine Structure.JOURNAL OF PHYSICAL CHEMISTRY C,114(1),#REF!.
MLA 张坤浩,et al."Temperature-Induced Interfacial Change in Au@SiO2 Core-Shell Nanoparticles Detected by Extended X-ray Absorption Fine Structure".JOURNAL OF PHYSICAL CHEMISTRY C 114.1(2010):#REF!.
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