Self-assembled thin films of Fe                         3                         O                         4                         -Ag composite nanoparticles for spintronic applications

Chengpeng Jiang; Chi Wah Leung; Philip W.T. Pong

doi:10.1016/j.apsusc.2017.05.116

Self-assembled thin films of Fe ₃ O ₄ -Ag composite nanoparticles for spintronic applications

Chengpeng Jiang, Chi Wah Leung, Philip W.T. Pong

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Controlled self-assembly of multi-component magnetic nanoparticles could lead to nanomaterial-based magnetic devices with novel structures and intriguing properties. Herein, self-assembled thin films of Fe ₃ O ₄ -Ag composite nanoparticles (CNPs) with hetero-dimeric shapes were fabricated using interfacial assembly method. The CNP-assembled thin films were further transferred to patterned silicon substrates followed by vacuum annealing, producing CNP-based magnetoresistive (MR) devices. Due to the presence of intra-particle interfaces and inter-particle barriers, an enhanced MR ratio and a non-linear current-voltage relation were observed in the device. The results of this work can potentially pave the way to the future exploration and development of spintronic devices built from composite nanomaterials.

Original language	English (US)
Pages (from-to)	692-696
Number of pages	5
Journal	Applied Surface Science
Volume	419
DOIs	https://doi.org/10.1016/j.apsusc.2017.05.116
State	Published - Oct 15 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

Keywords

Interfacial assembly
Magnetic nanoparticle
Magnetoresistance
Material interface
Nanoparticle thin film
Spintronics

Access to Document

10.1016/j.apsusc.2017.05.116

Cite this

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title = " Self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles for spintronic applications ",

abstract = " Controlled self-assembly of multi-component magnetic nanoparticles could lead to nanomaterial-based magnetic devices with novel structures and intriguing properties. Herein, self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles (CNPs) with hetero-dimeric shapes were fabricated using interfacial assembly method. The CNP-assembled thin films were further transferred to patterned silicon substrates followed by vacuum annealing, producing CNP-based magnetoresistive (MR) devices. Due to the presence of intra-particle interfaces and inter-particle barriers, an enhanced MR ratio and a non-linear current-voltage relation were observed in the device. The results of this work can potentially pave the way to the future exploration and development of spintronic devices built from composite nanomaterials.",

keywords = "Interfacial assembly, Magnetic nanoparticle, Magnetoresistance, Material interface, Nanoparticle thin film, Spintronics",

author = "Chengpeng Jiang and Leung, {Chi Wah} and Pong, {Philip W.T.}",

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year = "2017",

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doi = "10.1016/j.apsusc.2017.05.116",

language = "English (US)",

volume = "419",

pages = "692--696",

journal = "Applied Surface Science",

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Self-assembled thin films of Fe ₃ O ₄ -Ag composite nanoparticles for spintronic applications . / Jiang, Chengpeng; Leung, Chi Wah; Pong, Philip W.T.
In: Applied Surface Science, Vol. 419, 15.10.2017, p. 692-696.

Research output: Contribution to journal › Article › peer-review

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T1 - Self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles for spintronic applications

AU - Jiang, Chengpeng

AU - Leung, Chi Wah

AU - Pong, Philip W.T.

PY - 2017/10/15

Y1 - 2017/10/15

N2 - Controlled self-assembly of multi-component magnetic nanoparticles could lead to nanomaterial-based magnetic devices with novel structures and intriguing properties. Herein, self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles (CNPs) with hetero-dimeric shapes were fabricated using interfacial assembly method. The CNP-assembled thin films were further transferred to patterned silicon substrates followed by vacuum annealing, producing CNP-based magnetoresistive (MR) devices. Due to the presence of intra-particle interfaces and inter-particle barriers, an enhanced MR ratio and a non-linear current-voltage relation were observed in the device. The results of this work can potentially pave the way to the future exploration and development of spintronic devices built from composite nanomaterials.

AB - Controlled self-assembly of multi-component magnetic nanoparticles could lead to nanomaterial-based magnetic devices with novel structures and intriguing properties. Herein, self-assembled thin films of Fe 3 O 4 -Ag composite nanoparticles (CNPs) with hetero-dimeric shapes were fabricated using interfacial assembly method. The CNP-assembled thin films were further transferred to patterned silicon substrates followed by vacuum annealing, producing CNP-based magnetoresistive (MR) devices. Due to the presence of intra-particle interfaces and inter-particle barriers, an enhanced MR ratio and a non-linear current-voltage relation were observed in the device. The results of this work can potentially pave the way to the future exploration and development of spintronic devices built from composite nanomaterials.

KW - Interfacial assembly

KW - Magnetic nanoparticle

KW - Magnetoresistance

KW - Material interface

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