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Showing posts from October, 2023

Harnessing the Potential of Quantum Dots

Quantum dots are tiny semiconductor nanocrystals that exhibit unique optical and electronic properties due to quantum confinement effects. Since their discovery in the 1980s, research on quantum dots has expanded tremendously given their potential applications across diverse fields.  Quantum dots can be made from various semiconductor materials like cadmium selenide or indium arsenide. Their distinct feature is that the electrons within the quantum dots are restricted in their movement to a very tiny region of space, smaller than their electron wavelength. This confinement leads to quantized energy levels and gives quantum dots astonishing characteristics compared to bulk solids.  Varying the size of quantum dots during synthesis allows tuning of their light emission frequency and color. Smaller dots emit blue light while larger ones give off red light. Having such fine control over their fluorescence and ability to absorb light across a huge spectral range make quantum dots excellent

2023 Nobel Prize in Chemistry on quantum dots

  The 2023 Nobel Prize in Chemistry - Honoring the Quantum Dot Revolutionaries The Nobel Prize in Chemistry for 2023 has been awarded to three pioneers in the field of quantum dots - Moungi G. Bawendi, Louis E. Brus, and Alexei I. Ekimov. Their groundbreaking research discovered these fascinating nanoparticles and unlocked their potential applications across many fields. But what exactly are quantum dots and why is this Nobel Prize so well-deserved? Let's dive in! What are Quantum Dots? Quantum dots are incredibly tiny nanocrystals, typically made of semiconductor materials like cadmium selenide. Just a few thousand atoms in size, their special electronic properties arise from the effects of quantum physics at this nano-scale. When electrons in the quantum dot are energized, they jump to higher energy levels farther from the atom's nucleus before falling back down and releasing energy as light. The color of this emitted light depends on the size of the quantum dot - smaller dot

Functional Framework Materials

An developing category of porous crystalline compounds known as functional framework materials may find use in a variety of fields, including the storage and separation of gases, catalysis, and other processes. These materials have metal centers at their cores, which are then joined by organic linkers to form organized three-dimensional structures that have high surface areas and pore diameters that can be tuned. Researchers are able to develop framework materials with specialized capabilities by methodically choosing a variety of metal nodes and biological linkers. For instance, frameworks that have open metal sites or functional groups are able to adsorb certain gas molecules in a selective manner. The structure is extremely porous, which results in a vast surface area that is available for reactions and interactions.  A significant amount of study is being put into the synthesis of innovative frameworks and the investigation of the distinctive aspects of these frameworks. These very