Luminescent, water-soluble silicon quantum dots via micro-plasma surface treatment

Jeslin J. Wu; Vighneswara Siva Santosh Kumar Kondeti; Peter J. Bruggeman; Uwe R. Kortshagen

doi:10.1088/0022-3727/49/8/08LT02

Luminescent, water-soluble silicon quantum dots via micro-plasma surface treatment

Jeslin J. Wu, Vighneswara Siva Santosh Kumar Kondeti, Peter J. Bruggeman, Uwe R. Kortshagen

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

14 Scopus citations

Abstract

Silicon quantum dots (SiQDs), with their broad absorption, narrow and size-tunable emission, and potential biocompatibility are highly attractive materials in biological imaging applications. The inherent hydrophobicity and instability of hydrogen-terminated SiQDs are obstacles to their widespread implementation. In this work, we successfully produced highly luminescent, hydrophilic SiQDs with long-term stability in water using non-thermal plasma techniques. Hydrogen-terminated SiQDs were produced in a low-pressure plasma and subsequently treated in water using an atmospheric-pressure plasma jet for surface modification. Preliminary assessments of the chemical mechanism(s) involved in the creation of water-soluble SiQDs were performed using Fenton's reaction and various plasma chemistries, suggesting both OH and O species play a key role in the oxidation of the SiQDs.

Original language	English (US)
Article number	08LT02
Journal	Journal of Physics D: Applied Physics
Volume	49
Issue number	8
DOIs	https://doi.org/10.1088/0022-3727/49/8/08LT02
State	Published - Jan 27 2016

Bibliographical note

Funding Information:
Nanocrystal synthesis and material characterization were supported by the National Science Foundation, MRSEC Program under grant DMR-1420013, and micro-plasma treatment was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences, Department of Energy Plasma Science Center Program under award number DE-SC0001939. Parts of this work were carried out in the College of Science and Engineering Characterization Facility, University of Minnesota, which receives partial support from NSF through the NNIN program.

Publisher Copyright:
© 2016 IOP Publishing Ltd.

Keywords

luminescence
micro-plasma
silicon quantum dots
water soluble

How much support was provided by MRSEC?

Partial

Reporting period for MRSEC

Period 3

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10.1088/0022-3727/49/8/08LT02

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Full text

Cite this

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title = "Luminescent, water-soluble silicon quantum dots via micro-plasma surface treatment",

abstract = "Silicon quantum dots (SiQDs), with their broad absorption, narrow and size-tunable emission, and potential biocompatibility are highly attractive materials in biological imaging applications. The inherent hydrophobicity and instability of hydrogen-terminated SiQDs are obstacles to their widespread implementation. In this work, we successfully produced highly luminescent, hydrophilic SiQDs with long-term stability in water using non-thermal plasma techniques. Hydrogen-terminated SiQDs were produced in a low-pressure plasma and subsequently treated in water using an atmospheric-pressure plasma jet for surface modification. Preliminary assessments of the chemical mechanism(s) involved in the creation of water-soluble SiQDs were performed using Fenton's reaction and various plasma chemistries, suggesting both OH and O species play a key role in the oxidation of the SiQDs.",

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author = "Wu, {Jeslin J.} and {Siva Santosh Kumar Kondeti}, Vighneswara and Bruggeman, {Peter J.} and Kortshagen, {Uwe R.}",

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N2 - Silicon quantum dots (SiQDs), with their broad absorption, narrow and size-tunable emission, and potential biocompatibility are highly attractive materials in biological imaging applications. The inherent hydrophobicity and instability of hydrogen-terminated SiQDs are obstacles to their widespread implementation. In this work, we successfully produced highly luminescent, hydrophilic SiQDs with long-term stability in water using non-thermal plasma techniques. Hydrogen-terminated SiQDs were produced in a low-pressure plasma and subsequently treated in water using an atmospheric-pressure plasma jet for surface modification. Preliminary assessments of the chemical mechanism(s) involved in the creation of water-soluble SiQDs were performed using Fenton's reaction and various plasma chemistries, suggesting both OH and O species play a key role in the oxidation of the SiQDs.

AB - Silicon quantum dots (SiQDs), with their broad absorption, narrow and size-tunable emission, and potential biocompatibility are highly attractive materials in biological imaging applications. The inherent hydrophobicity and instability of hydrogen-terminated SiQDs are obstacles to their widespread implementation. In this work, we successfully produced highly luminescent, hydrophilic SiQDs with long-term stability in water using non-thermal plasma techniques. Hydrogen-terminated SiQDs were produced in a low-pressure plasma and subsequently treated in water using an atmospheric-pressure plasma jet for surface modification. Preliminary assessments of the chemical mechanism(s) involved in the creation of water-soluble SiQDs were performed using Fenton's reaction and various plasma chemistries, suggesting both OH and O species play a key role in the oxidation of the SiQDs.

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Luminescent, water-soluble silicon quantum dots via micro-plasma surface treatment

Abstract

Bibliographical note

Keywords

How much support was provided by MRSEC?

Reporting period for MRSEC

Access

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MRSEC IRG-2: Sustainable Nanocrystal Materials

University of Minnesota MRSEC (DMR-1420013)

Cite this

Luminescent, water-soluble silicon quantum dots via micro-plasma surface treatment

Abstract

Bibliographical note

Keywords

How much support was provided by MRSEC?

Reporting period for MRSEC

Access

OpenUrl availability

Other files and links

Fingerprint

Projects

MRSEC IRG-2: Sustainable Nanocrystal Materials

University of Minnesota MRSEC (DMR-1420013)

Cite this