Semiconductor Nanocrystals: Structure, Properties, and Band Gap Engineering
2009/10/14 by Andrew M. Smith, Shuming Nie · 30 citations
Materials Science · Engineering · #Quantum Dots Synthesis And Properties #Chalcogenide Semiconductor Thin Films #Nanowire Synthesis and Applications
paper · doi:10.1021/ar9001069
Abstract
Semiconductor nanocrystals are tiny light-emitting particles on the nanometer scale. Researchers have studied these particles intensely and have developed them for broad applications in solar energy conversion, optoelectronic devices, molecular and cellular imaging, and ultrasensitive detection. A major feature of semiconductor nanocrystals is the quantum confinement effect, which leads to spatial enclosure of the electronic charge carriers within the nanocrystal. Because of this effect, researchers can use the size and shape of these "artificial atoms" to widely and precisely tune the energy of discrete electronic energy states and optical transitions. As a result, researchers can tune the light emission from these particles throughout the ultraviolet, visible, near-infrared, and mid-infrared spectral ranges. These particles also span the transition between small molecules and bulk crystals, instilling novel optical properties such as carrier multiplication, single-particle blinking, and spectral diffusion. In addition, semiconductor nanocrystals provide a versatile building block for developing complex nanostructures such as superlattices and multimodal agents for molecular imaging and targeted therapy. In this Account, we discuss recent advances in the understanding of the atomic structure and optical properties of semiconductor nanocrystals. We also discuss new strategies for band gap and electronic wave function engineering to control the location of charge carriers. New methodologies such as alloying, doping, strain-tuning, and band-edge warping will likely play key roles in the further development of these particles for optoelectronic and biomedical applications.
Cited by
- Nanocrystal Heterostructures Based on Halide Perovskites and Metal Sulfides
- Quantum Dots with Phenylboronic Acid Tags for Specific Labeling of Sialic Acids on Living Cells
- Adsorption properties of HCN, NO, and NH 3 on transition metal-doped AA-stacked bilayer graphene: first principle study
- Nanocrystals Heterostructures based on Halide Perovskites and Metal Sulfides
- Explainable ensemble learning to predict anisotropic nanomaterial band gap using atomic-scale structural descriptors
- Inorganic nanoparticle-based contrast agents for molecular imaging. [europepmc]
- Cancer nanotheranostics: improving imaging and therapy by targeted delivery across biological barriers. [europepmc]
- The big picture on nanomedicine: the state of investigational and approved nanomedicine products. [europepmc]
- Semiconductor quantum dots for bioimaging and biodiagnostic applications. [europepmc]
- Nanoparticles for Improving Cancer Diagnosis. [europepmc]
- Implantable nanosensors: toward continuous physiologic monitoring. [europepmc]
- Förster Resonance Energy Transfer between Quantum Dot Donors and Quantum Dot Acceptors. [europepmc]
- Construction of RNA-Quantum Dot Chimera for Nanoscale Resistive Biomemory Application. [europepmc]
- Brightness-equalized quantum dots. [europepmc]
- Positron emission tomography and nanotechnology: A dynamic duo for cancer theranostics. [europepmc]
- Quantum Dot Surface Engineering: Toward Inert Fluorophores with Compact Size and Bright, Stable Emission. [europepmc]
- Understanding Mechanism of Photocatalytic Microbial Decontamination of Environmental Wastewater. [europepmc]
- Nanopharmaceuticals and nanomedicines currently on the market: challenges and opportunities. [europepmc]
- Inorganic Complexes and Metal-Based Nanomaterials for Infectious Disease Diagnostics. [europepmc]
- Nanotechnology for Neuroscience: Promising Approaches for Diagnostics, Therapeutics and Brain Activity Mapping. [europepmc]
- Virus-Sized Gold Nanorods: Plasmonic Particles for Biology. [europepmc]
- Recent Progress in the Photocatalytic Reduction of Carbon Dioxide. [europepmc]
- A Supported Bismuth Halide Perovskite Photocatalyst for Selective Aliphatic and Aromatic C-H Bond Activation. [europepmc]
- Large lattice distortions and size-dependent bandgap modulation in epitaxial halide perovskite nanowires. [europepmc]
- Heterogeneous photocatalysis in flow chemical reactors. [europepmc]
- Control over Structure and Properties in Nanocrystal Aerogels at the Nano-, Micro-, and Macroscale. [europepmc]
- Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations. [europepmc]
- Quantum Dots for Cancer-Related miRNA Monitoring. [europepmc]
- Heterophase Polymorph of TiO 2 (Anatase, Rutile, Brookite, TiO 2 (B)) for Efficient Photocatalyst: Fabrication and Activity. [europepmc]
- Charge Transfer from Quantum-Confined 0D, 1D, and 2D Nanocrystals. [europepmc]
Related