NDLI: Ag decorated topological surface state protected hierarchical Bi<sub>2</sub>Se<sub>3</sub> nanoflakes for enhanced field emission properties

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Inside back cover

Back cover

Journal of Materials Chemistry C Vol - 3 Issue - 7

Journal of Materials Chemistry C Vol - 3 Issue - 6

Journal of Materials Chemistry C Vol - 3 Issue - 5

Journal of Materials Chemistry C Vol -2

Journal of Materials Chemistry C Vol -1

Ag decorated topological surface state protected hierarchical Bi₂Se₃ nanoflakes for enhanced field emission properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Maity, Supratim Das, Biswajit Chattopadhyay, Kalyan Kumar Sarkar, Debabrata
Copyright Year	2015
Abstract	In this paper, we report an economical and low temperature synthesis route of Ag nanoparticle decorated hierarchical Bi2Se3 nanoflakes (NFs) over a large surface area of Si substrate in an open atmosphere. Detailed analysis of the field emission (FE) properties indicate that the hierarchical Bi2Se3 NFs shows reasonable FE properties due to their high aspect ratio and well-aligned uniform distribution. For improving the FE properties of as-synthesized Bi2Se3 NFs, silver (Ag) nanoparticles (NPs) have been attached to its surfaces. Ag NP attached Bi2Se3 NFs exhibit superior FE properties compared with pure Bi2Se3 NFs. The turn-on field is found to be reduced from 3.83 V μm−1 to 2.03 V μm−1 after attachment of the Ag NPs. Finite element analysis with ANSYS Maxwell simulation software also confirms that Ag decorated Bi2Se3 NFs are better field emitters than Bi2Se3 NFs. The enhanced FE properties of the Ag attached Bi2Se3 heterostructure is attributed to the electron injection from Ag nanoparticles to Bi2Se3 and also to the formation of extra emitting sites at the edge of the NFs. Finally, X-ray photo emission spectroscopy (XPS) confirms that unlike most of the previous reports, surface states are appreciably stable and strongly protected from any surface reactivity and oxidation, even if subjected to adverse atmosphere or high magnitude electric fields.
Starting Page	1766
Ending Page	1775
Page Count	10
File Format	HTM / HTML PDF
ISSN	20507526
Volume Number	3
Issue Number	8
Journal	Journal of Materials Chemistry C
DOI	10.1039/c4tc02035a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	ANSYS Maxwell Ag Nanoparticle Bismuth selenide Photolithography Discrete uniform distribution Micrometre Finite element method Ansys James Clerk Maxwell Heterojunction Spectroscopy
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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