Abstract
Alloyed semiconductor quantum dots (cadmium selenium telluride) with both homogeneous and gradient internal structures have been prepared to achieve continuous tuning of the optical properties without changing the particle size. Our results demonstrate that composition and internal structure are two important parameters that can be used to tune the optical and electronic properties of multicomponent, alloyed quantum dots. A surprising finding is a nonlinear relationship between the composition and the absorption/emission energies, leading to new properties not obtainable from the parent binary systems. With red-shifted light emission up to 850 nm and quantum yields up to 60%, this new class of alloyed quantum dots opens new possibilities in band gap engineering and in developing near-infrared fluorescent probes for in vivo molecular imaging and biomarker detection.
Keywords
Quantum dotChemistrySemiconductorBand gapParticle sizeParticle (ecology)OptoelectronicsAbsorption (acoustics)Quenching (fluorescence)FluorescenceNanotechnologyOpticsPhysical chemistryMaterials sciencePhysics
MeSH Terms
AlloysCadmium CompoundsKineticsMicroscopyElectronOptics and PhotonicsParticle SizeQuantum TheorySelenium CompoundsTelluriumX-Ray Diffraction
Affiliated Institutions
Related Publications
Semiconductor Clusters, Nanocrystals, and Quantum Dots
Current research into semiconductor clusters is focused on the properties of quantum dots—fragments of semiconductor consisting of hundreds to many thousands of atoms—with the b...
Growth of Uniformly Aligned ZnO Nanowire Heterojunction Arrays on GaN, AlN, and Al<sub>0.5</sub>Ga<sub>0.5</sub>N Substrates
Vertically aligned single-crystal ZnO nanorods have been successfully fabricated on semiconducting GaN, Al0.5Ga0.5N, and AlN substrates through a vapor-liquid-solid process. Nea...
Facile Synthesis of ZnS−CuInS<sub>2</sub>-Alloyed Nanocrystals for a Color-Tunable Fluorchrome and Photocatalyst
High-quality ZnS-CuInS(2) (ZCIS) alloy nanocrystals have been synthesized via reaction between the acetate salts of the corresponding metals and elemental sulfur in the presence...
Synthesis and Properties of Biocompatible Water-Soluble Silica-Coated CdSe/ZnS Semiconductor Quantum Dots
We describe the synthesis of water-soluble semiconductor nanoparticles and discuss and characterize their properties. Hydrophobic CdSe/ZnS core/shell nanocrystals with a core si...
Excited-state quenching of a highly luminescent conjugated polymer
The optical properties of a luminescent polymer, poly[1,4-phenylene-1,2-di(phenoxyphenyl) vinylene], have been investigated. Its photoluminescence yield increases unusually in t...
Publication Info
- Year
- 2003
- Type
- article
- Volume
- 125
- Issue
- 23
- Pages
- 7100-7106
- Citations
- 921
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
921
OpenAlex
13
Influential
859
CrossRef
Cite This
Robert E. Bailey,
Shuming Nie
(2003).
Alloyed Semiconductor Quantum Dots: Tuning the Optical Properties without Changing the Particle Size.
Journal of the American Chemical Society
, 125
(23)
, 7100-7106.
https://doi.org/10.1021/ja035000o
Identifiers
- DOI
- 10.1021/ja035000o
- PMID
- 12783563