Wide Bandgap Shell
Wide Bandgap Shell - Related Videos
10:35
Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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2014
Disordered structures offer new mechanisms for forming photonic bandgaps and unprecedented freedom in functional-defect designs. To circumvent the computational challenges of disordered systems, we construct modular macroscopic samples of the new class of PBG materials and use microwaves to characterize their scale-invariant photonic properties, in an easy and inexpensive manner.
10:23
Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq
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Cited by 15 •
2015
The question of how chromatin regulators and chromatin states affect the genome in vivo is key to our understanding of how early cell fate decisions are made in the developing embryo. ChIP-Seq—the most popular approach to investigate chromatin features at a global level—is outlined here for Xenopus embryos.
08:40
Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
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Cited by 1 •
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The Target ID Library is a plasmid-based, genome-wide collection of cloned cDNA used to identify miRNA targets. Here we demonstrate its use and application.
01:11
Genome-wide Association Studies-GWAS
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2023
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease. GWAS does not require the identification of the target gene involved in...
FAQs
The larger bandgap establishes energetic offsets at the core-shell interface, favoring confinement of charge carriers within the core. This spatial control can limit carrier access to surface regions where defects promote nonradiative recombination, meaning recombination that does not produce light. The result is improved emission efficiency while preserving the core’s role in determining key electronic and optical behavior.
Shell passivation reduces the influence of surface defects, which can otherwise provide pathways for nonradiative recombination. By chemically and electronically protecting the core surface, the shell helps more excitation energy contribute to photoluminescence rather than being lost. This protection also improves chemical stability, making the nanocrystal more suitable for applications requiring consistent optical performance.
Shell composition and thickness modify the interface surrounding the core, so they can change carrier confinement and the resulting electronic and optical response. These variables influence properties such as absorption, photoluminescence, and charge transfer. Consequently, shell design must be matched to the intended function rather than treated as a fixed coating across all core-shell nanocrystal systems.
Because the shell changes the energetic environment around the core, it can influence how charges are confined and how charge transfer occurs within the nanocrystal structure. The same interface that supports confinement can therefore be used to tune electronic behavior. This makes shell selection important when a material must balance strong emission with controlled charge-transfer characteristics.
Design begins by selecting a shell composition and thickness that produce the desired balance of carrier confinement, surface passivation, optical response, and chemical stability. Researchers can then relate those choices to target properties such as absorption, photoluminescence, or charge transfer. This property-guided approach supports optimization for different devices and experiments without assuming that one shell design fits every use.
These structures support applications that depend on controlled nanoscale optical or electronic behavior. The source identifies lighting, imaging, sensing, and photovoltaic technologies as important examples. In each case, shell design can contribute through improved emission efficiency, enhanced chemical stability, or tailored absorption and charge-transfer properties, allowing the nanocrystal system to be adapted to the performance needs of the application.
They provide a way to engineer nanocrystal properties through composition and interface design rather than relying only on the core material. Chemists and materials researchers can use this control to connect nanoscale structure with measurable absorption, photoluminescence, charge transfer, and stability. The approach is therefore relevant to developing semiconductor materials whose behavior is deliberately tuned for research and technological applications.