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US trio wins Nobel Prize 2023 in Chemistry

04:29 PM | 4 Oct, 2023
US trio wins Nobel Prize 2023 in Chemistry
Source: A screengrab from Twitter video

OSLO – The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Chemistry 2023 to three US scientists “for the discovery and synthesis of quantum dots”.

Moungi G. Bawendi, who is associated with Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, Louis E. Brus from Columbia University, New York, NY, USA and Alexei I. Ekimov from Nanocrystals Technology Inc., New York, NY, USA, have been awarded with the prestigious award. 

The Nobel Prize in Chemistry 2023 rewards the discovery and development of quantum dots, nanoparticles so tiny that their size determines their properties. These smallest components of nanotechnology now spread their light from televisions and LED lamps, and can also guide surgeons when they remove tumour tissue, among many other things.

The Nobel Laureates in Chemistry 2023 have succeeded in producing particles so small that their properties are determined by quantum phenomena. The particles, which are called quantum dots, are now of great importance in nanotechnology.

“Quantum dots have many fascinating and unusual properties. Importantly, they have different colours depending on their size,” says Johan Åqvist, Chair of the Nobel Committee for Chemistry.

Physicists had long known that in theory size-dependent quantum effects could arise in nanoparticles, but at that time it was almost impossible to sculpt in nanodimensions. Therefore, few people believed that this knowledge would be put to practical use.

However, in the early 1980s, Alexei Ekimov succeeded in creating size-dependent quantum effects in coloured glass. The colour came from nanoparticles of copper chloride and Ekimov demonstrated that the particle size affected the colour of the glass via quantum effects.

A few years later, Louis Brus was the first scientist in the world to prove size-dependent quantum effects in particles floating freely in a fluid.

In 1993, Moungi Bawendi revolutionised the chemical production of quantum dots, resulting in almost perfect particles. This high quality was necessary for them to be utilised in applications.

Quantum dots now illuminate computer monitors and television screens based on QLED technology. They also add nuance to the light of some LED lamps, and biochemists and doctors use them to map biological tissue.

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Rupee exchange rate to US Dollar, Euro, Pound, Dirham, and Riyal - 25 Feb 2024 forex rates

Pakistani rupee remains stable against US dollar in the open market on February 25, 2024 (Sunday).

US Dollar rate in Pakistan

In the open market, the US dollar was being quoted at 279.5 for buying and 282.55 for selling.

Euro currently stands at 302 for buying and 305 for selling while British Pound rate stands at 352.5 for buying, and 356 for selling.

UAE Dirham AED hovers at 76.1 whereas the Saudi Riyal saw slight increase, with new rates at 74.35.

Today’s currency exchange rates in Pakistan - 25 Feb 2024

Source: Forex Association of Pakistan. (last update 09:00 AM)
Currency Symbol Buying Selling
US Dollar USD 279.5 282.55
Euro EUR 302 305
UK Pound Sterling GBP 352.5 356
U.A.E Dirham AED 76.1 76.8
Saudi Riyal SAR 74.35 75.1
Australian Dollar AUD 181 183
Bahrain Dinar BHD 743.88 751.88
Canadian Dollar CAD 207 209
China Yuan CNY 38.89 39.29
Danish Krone DKK 40.38 40.78
Hong Kong Dollar HKD 35.76 36.11
Indian Rupee INR 3.37 3.48
Japanese Yen JPY 2.10 2.18
Kuwaiti Dinar KWD 908.79 917.79
Malaysian Ringgit MYR 58.6 59.2
New Zealand Dollar NZD 171.68 173.68
Norwegians Krone NOK 26.43 26.73
Omani Riyal OMR 726.53 734.53
Qatari Riyal QAR 76.76 77.46
Singapore Dollar SGD 207 209
Swedish Korona SEK 26.53 26.83
Swiss Franc CHF 317.87 320.37
Thai Bhat THB 7.79 7.94

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