Size control, shape evolution, and silica coating of near-infrared-emitting PbSe quantum dots

Timothy T. Tan; S. Tamil Selvan; Lan Zhao; Shujun Gao; Jackie Y. Ying

doi:10.1021/cm061974e

Size control, shape evolution, and silica coating of near-infrared-emitting PbSe quantum dots

Timothy T. Tan, S. Tamil Selvan^*, Lan Zhao, Shujun Gao, Jackie Y. Ying

^*Corresponding author for this work

Agency for Science, Technology and Research, Singapore

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

134 Citations (Scopus)

Abstract

The physical and optical properties of quantum dots (QDs) are governed by their particle size and shape. In this study, near-infrared-emitting PbSe QDs were synthesized with controlled size (between 7 and 12 nm) and shape (spheres, octahedrons/cubes), with tunable emission from 1200 to 1500 nm. The hydrophobic PbSe QDs were coated with a silica shell to render them water-soluble and non-cytotoxic. The cell viability of NIH-3T3 (mouse fibroblast cells) and HepG2 (human liver cancer cells) was retained at 80% even in the presence of a high QD loading of 100 μg/mL.

Original language	English
Pages (from-to)	3112-3117
Number of pages	6
Journal	Chemistry of Materials
Volume	19
Issue number	13
DOIs	https://doi.org/10.1021/cm061974e
Publication status	Published - Jun 26 2007
Externally published	Yes

ASJC Scopus Subject Areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/cm061974e

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abstract = "The physical and optical properties of quantum dots (QDs) are governed by their particle size and shape. In this study, near-infrared-emitting PbSe QDs were synthesized with controlled size (between 7 and 12 nm) and shape (spheres, octahedrons/cubes), with tunable emission from 1200 to 1500 nm. The hydrophobic PbSe QDs were coated with a silica shell to render them water-soluble and non-cytotoxic. The cell viability of NIH-3T3 (mouse fibroblast cells) and HepG2 (human liver cancer cells) was retained at 80% even in the presence of a high QD loading of 100 μg/mL.",

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AU - Tan, Timothy T.

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AU - Gao, Shujun

AU - Ying, Jackie Y.

PY - 2007/6/26

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AB - The physical and optical properties of quantum dots (QDs) are governed by their particle size and shape. In this study, near-infrared-emitting PbSe QDs were synthesized with controlled size (between 7 and 12 nm) and shape (spheres, octahedrons/cubes), with tunable emission from 1200 to 1500 nm. The hydrophobic PbSe QDs were coated with a silica shell to render them water-soluble and non-cytotoxic. The cell viability of NIH-3T3 (mouse fibroblast cells) and HepG2 (human liver cancer cells) was retained at 80% even in the presence of a high QD loading of 100 μg/mL.

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Size control, shape evolution, and silica coating of near-infrared-emitting PbSe quantum dots

Abstract

ASJC Scopus Subject Areas

UN SDGs

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