Controlling the assembly and spin transport of tetrathiafulvalene carboxylate coated iron oxide nanoparticles

被引：4
|
作者：
Lv, Zhong-Peng [1 ]
Wang, Tao [1 ]
Ge, Jing-Yuan [1 ]
Luan, Zhong-Zhi [2 ]
Wu, Di [2 ]
Zuo, Jing-Lin [1 ]
Sun, Shouheng [3 ]
机构：
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Brown Univ, Dept Chem, Providence, RI 02912 USA
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2017年 / 5卷 / 29期
基金：
中国国家自然科学基金;
关键词：
ENHANCED MAGNETORESISTANCE; NANOCRYSTALLINE MAGNETITE; MAGNETOTRANSPORT; AGGREGATION; FABRICATION; CONDUCTION; COMPLEXES; LIGANDS; FILMS; ACID;
D O I：
10.1039/c7tc01021d
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a solution phase based assembly method to tune the transport mechanism and magnetoresistance (MR) of Fe3O4 nanoparticles (NPs). The NP topological arrangement is altered by the NP coating of tetrathiafulvalene carboxylic acid (TTFCOOH) or its dicarboxylic analogue (TTF(COOH)(2)). Consequently, the transport mechanism of the assembly switches from tunneling to Mott hopping. The MR ratios of the Fe3O4 NP assemblies can be further tuned by the polarity of the solvent used in the ligand exchange process. The TTF(COO)(2)-coated Fe3O4 NP assembly has a 5% room temperature MR ratio, which is the highest value among all TTF-COO-Fe3O4 NP assemblies reported so far.
引用
收藏
页码：7200 / 7206
页数：7
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