单晶介孔PbTiO3纳米线制备及电输运特性研究

单晶介孔PbTiO₃纳米线制备及电输运特性研究

翟阿敏，曹  广，皇甫磊磊，王江伟，田  鹤^*，张  泽

（浙江大学电子显微镜中心，硅材料国家重点实验室，材料科学与工程学院，浙江 杭州310027）

摘  要  通过水热法制备了单晶介孔钛酸铅（PbTiO₃）纳米线，利用原位透射电子显微技术对其进行了电输运性能研究。结果表明，单根介孔PbTiO₃纳米线表现出非线性、不对称的I/V特性；小偏压下表现为欧姆特性，I-V数据满足线性关系；在较高偏压下表现为肖特基发射，且ln(J)-E^1/2数据满足较好线性规律；在更高偏压下，由于铁电疲劳和热发射现象增强，表现为混合发射；PbTiO₃纳米线整体表现出良好的铁电性能，对铁电纳米器件电学性能的调控和优化有一定的参考意义。

关键词  PbTiO₃纳米线；原位透射电镜；肖特基；电输运特性

中图分类号  TM221；O738；TB383；TG115.21⁺5.3 

文献标识码：A   doi:10.3969/j.issn.1000-6281.2020.01.002

Preparation and electrical transport characteristics of single crystal mesoporous PbTiO₃ nanowires

ZHAI A-min, CAO Guang, HUANGFU Lei-lei, WANG Jiang-wei, TIAN He^* , ZHANG Ze

( Center of Electron Microscopy，State Key Laboratory of Silicon Materials，and Department of Materials Science and Engineering，Hangzhou Zhejiang 310027，China)

Abstract Single crystal mesoporous PbTiO₃ nanowires were prepared by hydrothermal method, and their electrical transport properties were investigated by in-situ transmission electron microscope. The results show that the single mesoporous PbTiO₃ nanowire exhibits nonlinear and asymmetricI/V characteristics. Under small bias voltage, it shows ohmic characteristic, and I-V data satisfies linear relation. Under higher bias voltage, it shows Schottky emission, and ln(J)-E^1/2 data meet a good linear rule. At higher bias voltage, it shows mixed emission due to the enhancement of ferroelectric fatigue and thermal emission phenomena ,. PbTiO₃ nanowires have good ferroelectric properties, which has certain reference significance for the regulation and optimization of the electrical properties of ferroelectric nano devices.

Keywords  PbTiO₃ nanowires; In-situ transmission electron microscope; Schottky; electrical transport characteristics

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[1]温建强，章力旺.压电材料的研究新进展[J]. 应用声学，2013，32(5)：413-418.

[2]YANG P D, YAN R X, FARDY M. Semiconductor nanowire: what’s next?[J]. Nano Lett，2010，10（5）：1529-1536.

[3]赵鹏辉，曹凡，贾双凤，等. MoO₃纳米带在外场作用下的相变[J]. 电子显微学报, 2017,36(5):429-435.

[4]BAI X D, GAO P X, WANG Z L，et al. Dual-mode mechanical resonance of individual ZnO nanobelts[J]. Appl Phys Lett，2003, 82（26）：4806-4808.

[5]ARNOLD M S, AVOURIS P, Pan Z W, et al. Field-effect transistors based on single semiconducting oxide nanobelts[J]. Phys Chem B，2003, 107（3）：659-663.

[6]COMINI E, FAGLIA G, SBERVEGLIERI G, et al. Stable and highly sensitive gas sensorsbased on semiconducting oxide nanobelts[J]. Appl Phys Lett，2002, 81（10）:1869-1871.

[7]MIYAUCHI M. Thin films of single-crystalline SrTiO₃ nanorod arrays and their surface wettability conversion[J]. J Phys Chem C，2007, 111（33）：12440-12445.

[8]REN Z，XU G，LIU Y，et al. PbTiO₃ nanofibers with edge-shared TiO₆ octahedra[J]. J Am Chem Soc，2010, 132（16）: 5572–5573.

[9]REN Z H, ZHAO R Y, CHEN X, et al. Mesopores induced zero thermal expansion in single-crystal ferroelectrics[J]. Nature Communications，2018，9（1）：1638.

[10]WATANABE Y. Electrical transport through Pb(Zr，Ti)O₃ p-n and p-p heterostructures modulated by bound charges at a ferroelectric surface: ferroelectric p-n diode[J].  Phys Rev B，1999, 59(17):11257-11266.

[11]BAI X D, GOLBERG D, BANDO Y. Deformation-driven electrical transport of individual boron nitride nanotubes[J]. Nano Lett，2007，7(3)：632-637.

[12]闻心怡. 铁电存储器关键工艺与器件建模研究[D]. 武汉：华中科技大学，2011.

[13]沈效农, 王弘. 铁电薄膜导电过程与机理[J]. 功能材料, 1996, 27( 4):295-301.

[14]徐静，何波. La掺杂 Ba_{0. 67} Sr_{0. 33} TiO₃陶瓷高介电常数机制探讨[J]. 电子显微学报, 2019, 38(1):27-33.

[15]黄昆原著, 韩汝琦改编. 固体物理学[M]. 北京：高等教育出版社, 1988:253.

[16]JONSCHERA K, CAREEMM A. Non-linearity of dielectric behaviour as evidence of space charge[J]. Physics Letters A，1975,55(4): 257-259.

[17]LI P, LU T M. Conduction mechanisms in BaTiO₃ thin films[J]. Phys Rev B Condens Matter，1991，43(17):14261-14264.