Quantum dots

Prof. Moungi Bawendi, Prof. Louis Brus of Columbia University and Alexei Ekimov of Nanocrystals Technology Inc., have been awarded the 2023 Nobel Prize in Chemistry for their work in the development of quantum dots, which are “now used to create color in flat screens, light emitting diode (LED) lamps and devices that help surgeons see blood vessels in tumors,” reports Niklas Pollard and Ludwig Burger for Reuters. “In 1993, Bawendi revolutionized the production of quantum dots, made up of clusters ranging from a few hundred to a few thousand atoms,” writes Pollard and Burger.

Optics & Photonics News reporter Patricia Daukantas spotlights how a team of researchers from the Singapore-MIT Alliance for Research and Technology (SMART) has uncovered a way to generate long wavelength light using intrinsic defects in semi-conducting materials. “The new method raises the possibility of future CMOS-compatible LEDs that give off the full spectrum of visible light, writes Daukantas, “without the need for phosphors that generate excess heat and shorten the diodes’ lifespan.”

Boston Globe reporter Martin Finucane writes that MIT researchers have developed a new way to fabricate tiny objects. “The researchers are currently able to create objects that are around 1 cubic millimeter, with features as small as 50 nanometers,” Finucane explains. “The tiny structures could be useful in fields from optics to medicine to robotics.”

MIT researchers have developed a new technique that can shrink objects to the nanoscale using a laser, reports Lauren Kent for CNN. Kent explains that the technology “could be applied to anything from developing smaller microscope and cell phone lenses to creating tiny robots that improve everyday life.”

Popular Mechanics reporter David Grossman writes about a new fabrication technique developed by MIT researchers that allows for regular-sized objects to be shrunk down to the nanoscale. Grossman explains that the new method, “takes a technique currently used to make images of brain tissue larger and reverses it.”

Inside Science reporter Yuen Yiu writes that MIT researchers have developed a new technique for producing nanoscale structures using a 3-D printing method that shrinks objects. Yiu explains that the new technique operates by “first creating a bigger structure inside of a gel, then shrinking the gel, which brings the structure down to one-thousandth the volume of the original.”

MIT researchers have developed a new method to shrink 3-D printed objects, reports Douglas Heaven for New Scientist. The technique can be used to create a wide variety of shapes using different materials. “In the 1970s hobbyists built their own computers at home,” explains Prof. Edward Boyden. “Maybe people can now make their own chips.”

Wired reporter James Temperton writes that MIT researchers have created a portable spectrometer that is small enough to fit inside a smartphone. The spectrometer could be used to diagnose diseases, “analyse urine samples, check pulse and oxygen levels and measure environmental pollutants,” Temperton explains. 

MIT researchers have developed a quantum-dot spectrometer that is small enough to fit into a smartphone, reports Alexandra Ossola for Popular Science. “Having all that computational power in the palms of their hands could help scientists diagnose of diseases (especially skin conditions), test urine samples, or identify food contaminants,” Ossola writes.