Nanotechnology Spotlight – Latest Articles

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Type II 'giant' quantum dots have record breaking lifetimes

quantum-dotsResearchers achieved a milestone in the synthesis of multifunctional photonic nanomaterials. They reported the synthesis of semiconductor 'giant' core-shell CdZnSe/CdS quantum dots with record breaking emissive lifetimes. Furthermore, the lifetimes can be tuned by making a simple alteration to the material's internal structure. These new particles have great efficacy for fundamental biological discovery as they emit at red wavelengths, which minimizes scattering, while the long lifetimes allow for biological imaging to be performed with less background noise.

Dec 2nd, 2022

MXene quantum dots as promising material for immunoengineering

mxene-quantum-dotsResearchers have have reported the synthesis process and biomedical applications of a novel nanomaterial for in vivo treatment of vasculopathy - a general term used to describe any disease affecting blood vessels. Through their innovative approach using rational design and synthesis strategies, the researchers developed intrinsically immunomodulatory and anti-inflammatory tantalum carbide MXene quantum dots. The team is confident that this new nanomaterial could reduce or even avoid the need for anti-rejection drugs for heart transplant patients.

May 9th, 2022

Intracellular activation of RNA interference upon DNA-driven organization of quantum dot assemblies

quantum-dot-assembliesIn addition to the plethora of functions such as storage of genetic information and regulation of its expression, DNA and RNA are also highly programmable biomaterials. DNA can be utilized to design short complementary sequences to be used as the linkers which bring together and organize other biological and inorganic materials. Quantum dots are one such inorganic candidate. Researchers now utilized DNA for the precise assembly of QDs into larger three-dimensional scaffolds.

Aug 18th, 2021

Delivering semiconductor quantum dots into live cells

quantum-dotsResearchers achieved a milestone in exploring biology using nanotechnology utilizing single-particle tracking to investigate the interaction between human T cells and individual fluorescent nanoparticles of semiconductor quantum dots (QDs). The researchers were able to deliver QDs into the cytosol of live T cells by decorating the nanoparticles with a unique cell-penetrating peptide. The study paves the way for improving drug delivery and immunotherapy using novel nanocarriers.

Mar 12th, 2021

Core/shell nanoparticles as efficient reducing agents

quantum-dot-modelGenerally it is believed that core quantum dots (QDs) are good reducing agents and are used for that purpose in solar hydrogen generation and various organic transformations. However, core QDs are very unstable. Core/shell dots are more robust, but the shell minimizes redox activity. Researchers now demonstrate that this isn't perfectly true. In fact, they found that certain core/shell materials are a better reducing agent than the core alone. Most importantly, core/shell QDs are substantially more robust than the core alone.

Nov 13th, 2020

Bilateral interface engineering for efficient and stable perovskite QLEDs

QLEDPerovskite QLEDs possess the features of wide gamut and real color expression; that's why they have been considered as very promising candidates for next-generation high-quality lighting and displays. However, device efficiency and stability of perovskite QLEDs has always been a major challenge. Researchers now report a new passivation technique that greatly enhances device performance and stability compared to single interface processing.

Aug 10th, 2020

3D-printed nanoscale color pixels improve brightness control

display-pixelsResearchers have fabricated nanoscale color pixels that utilize three-dimensional space to improve and control the brightness of individual pixels with nanoscale lateral dimensions. Specifically, this novel method utilizes 3D printing of vertically freestanding nanostructures containing red, green, or blue light-emitting quantum dots embedded in polymer nanowires. The emission brightness of the pixels linearly increases with the height of the pixels due to the increase in the number of quantum dots due to the increased volume. The 3D geometry enables a 2-fold increase in brightness without causing significant changes in the lateral dimensions of the pixel.

Aug 5th, 2020

Beta-lead oxide quantum dots

2D-materialIn recent years, black-phosphorus-analogue (BPA) two-dimensional materials have been demonstrated to exhibit promising optoelectronic performances and distinguished ambient stabilities, holding great promise in practical applications. In new work, researchers demonstrated that ultra-small 2D beta-lead oxide quantum dots showed fast carrier dynamics and significantly high photocurrent density and excellent ambient stability. These findings hold great potential for high-performance BPA-based optoelectronic devices.

Nov 6th, 2018