Palladium nanoparticle enhanced giant photoresponse at LaAlO 3/SrTiO3 two-dimensional electron gas heterostructures

Ngai Yui Chan; Meng Zhao; Ning Wang; Kit Au; Juan Wang; Lai Wa Helen Chan; Jiyan Dai

doi:10.1021/nn4029184

Palladium nanoparticle enhanced giant photoresponse at LaAlO ₃/SrTiO₃ two-dimensional electron gas heterostructures

Ngai Yui Chan, Meng Zhao, Ning Wang, Kit Au, Juan Wang, Lai Wa Helen Chan, Jiyan Dai

Research output: Journal article publication › Journal article › Academic research › peer-review

56 Citations (Scopus)

Abstract

With LaAlO3 surface modification by Pd nanoparticles, LaAlO 3/SrTiO3 (LAO/STO) interfacial two-dimensional electron gas presents a giant optical switching effect with a photoconductivity on/off ratio as high as 750% under UV light irradiation. Pd nanoparticles with a size around 2 nm are deposited on top of the LAO surface, and the LAO/STO interface exhibits a giant response to UV light with a wavelength shorter than 400 nm. This giant optical switching behavior has been explained by the Pd nanoparticle's catalytic effect and surface/interface charge coupling.

Original language	English
Pages (from-to)	8673-8679
Number of pages	7
Journal	ACS Nano
Volume	7
Issue number	10
DOIs	https://doi.org/10.1021/nn4029184
Publication status	Published - 22 Oct 2013

Keywords

interface
LaAlO /SrTiO 3 3
photoresponse
two-dimensional electron gas

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

More information

10.1021/nn4029184

Cite this

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title = "Palladium nanoparticle enhanced giant photoresponse at LaAlO 3/SrTiO3 two-dimensional electron gas heterostructures",

abstract = "With LaAlO3 surface modification by Pd nanoparticles, LaAlO 3/SrTiO3 (LAO/STO) interfacial two-dimensional electron gas presents a giant optical switching effect with a photoconductivity on/off ratio as high as 750% under UV light irradiation. Pd nanoparticles with a size around 2 nm are deposited on top of the LAO surface, and the LAO/STO interface exhibits a giant response to UV light with a wavelength shorter than 400 nm. This giant optical switching behavior has been explained by the Pd nanoparticle's catalytic effect and surface/interface charge coupling.",

keywords = "interface, LaAlO /SrTiO 3 3, photoresponse, two-dimensional electron gas",

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year = "2013",

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T1 - Palladium nanoparticle enhanced giant photoresponse at LaAlO 3/SrTiO3 two-dimensional electron gas heterostructures

AU - Chan, Ngai Yui

AU - Zhao, Meng

AU - Wang, Ning

AU - Au, Kit

AU - Wang, Juan

AU - Chan, Lai Wa Helen

AU - Dai, Jiyan

PY - 2013/10/22

Y1 - 2013/10/22

N2 - With LaAlO3 surface modification by Pd nanoparticles, LaAlO 3/SrTiO3 (LAO/STO) interfacial two-dimensional electron gas presents a giant optical switching effect with a photoconductivity on/off ratio as high as 750% under UV light irradiation. Pd nanoparticles with a size around 2 nm are deposited on top of the LAO surface, and the LAO/STO interface exhibits a giant response to UV light with a wavelength shorter than 400 nm. This giant optical switching behavior has been explained by the Pd nanoparticle's catalytic effect and surface/interface charge coupling.

AB - With LaAlO3 surface modification by Pd nanoparticles, LaAlO 3/SrTiO3 (LAO/STO) interfacial two-dimensional electron gas presents a giant optical switching effect with a photoconductivity on/off ratio as high as 750% under UV light irradiation. Pd nanoparticles with a size around 2 nm are deposited on top of the LAO surface, and the LAO/STO interface exhibits a giant response to UV light with a wavelength shorter than 400 nm. This giant optical switching behavior has been explained by the Pd nanoparticle's catalytic effect and surface/interface charge coupling.

KW - interface

KW - LaAlO /SrTiO 3 3

KW - photoresponse

KW - two-dimensional electron gas

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U2 - 10.1021/nn4029184

DO - 10.1021/nn4029184

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JO - ACS Nano

JF - ACS Nano

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