The WS2quantum dot: Preparation, characterization and its optical limiting effect in polymethylmethacrylate

Hui Long; Lili Tao; Chun Pang Chiu; Chun Yin Tang; Kin Hung Fung; Yang Chai; Yuen Hong Tsang

doi:10.1088/0957-4484/27/41/414005

The WS₂quantum dot: Preparation, characterization and its optical limiting effect in polymethylmethacrylate

Hui Long, Lili Tao, Chun Pang Chiu, Chun Yin Tang, Kin Hung Fung, Yang Chai, Yuen Hong Tsang

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

43 Citations (Scopus)

Abstract

ï¿½ 2016 IOP Publishing Ltd. Due to the matching surface energy, WS2quantum dots (QDs) can be obtained through direct liquid exfoliation in N-methyl-2-pyrrolidone rather than an ethanol and water mixture. Ultra-small WS2QDs with a diameter of 2.4 nm are fabricated by an ultrasound method followed by high speed centrifugation up to 10 000 rpm. An excellent nonlinear optical (NLO) property of the WS2QD/ polymethylmethacrylate (PMMA) composite for the nanosecond pulsed laser at both 532 and 1064 nm has been measured. Results illustrate the lower onset thresholds (FON), lower optical limiting thresholds (FOL), and higher two-photon absorption coefficient (β) with respect to a higher concentration of embedded WS2QDs into the PMMA solid state matrix for both 532 and 1064 nm.

Original language	English
Article number	414005
Journal	Nanotechnology
Volume	27
Issue number	41
DOIs	https://doi.org/10.1088/0957-4484/27/41/414005
Publication status	Published - 8 Sept 2016

Keywords

concentration
optical limiting
PMMA matrix
ultra small
WS quantum dots 2

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

More information

10.1088/0957-4484/27/41/414005

Cite this

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title = "The WS2quantum dot: Preparation, characterization and its optical limiting effect in polymethylmethacrylate",

abstract = "{\"i}¿½ 2016 IOP Publishing Ltd. Due to the matching surface energy, WS2quantum dots (QDs) can be obtained through direct liquid exfoliation in N-methyl-2-pyrrolidone rather than an ethanol and water mixture. Ultra-small WS2QDs with a diameter of 2.4 nm are fabricated by an ultrasound method followed by high speed centrifugation up to 10 000 rpm. An excellent nonlinear optical (NLO) property of the WS2QD/ polymethylmethacrylate (PMMA) composite for the nanosecond pulsed laser at both 532 and 1064 nm has been measured. Results illustrate the lower onset thresholds (FON), lower optical limiting thresholds (FOL), and higher two-photon absorption coefficient (β) with respect to a higher concentration of embedded WS2QDs into the PMMA solid state matrix for both 532 and 1064 nm.",

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AU - Long, Hui

AU - Tao, Lili

AU - Chiu, Chun Pang

AU - Tang, Chun Yin

AU - Fung, Kin Hung

AU - Chai, Yang

AU - Tsang, Yuen Hong

PY - 2016/9/8

Y1 - 2016/9/8

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AB - ï¿½ 2016 IOP Publishing Ltd. Due to the matching surface energy, WS2quantum dots (QDs) can be obtained through direct liquid exfoliation in N-methyl-2-pyrrolidone rather than an ethanol and water mixture. Ultra-small WS2QDs with a diameter of 2.4 nm are fabricated by an ultrasound method followed by high speed centrifugation up to 10 000 rpm. An excellent nonlinear optical (NLO) property of the WS2QD/ polymethylmethacrylate (PMMA) composite for the nanosecond pulsed laser at both 532 and 1064 nm has been measured. Results illustrate the lower onset thresholds (FON), lower optical limiting thresholds (FOL), and higher two-photon absorption coefficient (β) with respect to a higher concentration of embedded WS2QDs into the PMMA solid state matrix for both 532 and 1064 nm.

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