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Quantum Dots

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Europe launches replication drive to test carbon quantum dot biosensors
science8 days ago

Europe launches replication drive to test carbon quantum dot biosensors

A Europe-backed NanoBubbles project is funding nanoscientists to replicate a 2012 study that carbon quantum dots can sense copper ions inside living cells, the first large-scale replication effort in the physical sciences aimed at the reproducibility crisis; initial attempts failed to reproduce the reported fluorescence change, illustrating how small impurities, incomplete protocols, and cross-lab variation can affect results, as the ERC-backed effort seeks self-correction in science.

via Nature|
#biosensors#nanoscience#quantum-dots
Louis Brus, Quantum Dot Pioneer and Nobel Laureate, Dies at 82
science1 month ago

Louis Brus, Quantum Dot Pioneer and Nobel Laureate, Dies at 82

Louis E. Brus, a Bell Labs chemist who discovered quantum dots—nanocrystals whose color depends on size—died at 82 from myelodysplastic syndrome. His 1983 discovery revealed size-tunable optical properties, helping ignite nanoscience and earning him the 2023 Nobel Prize in Chemistry with Moungi Bawendi and Aleksey Yekimov. Quantum dots now enhance displays and medical imaging and may power future solar cells and encryption; Brus later taught at Columbia after leaving Bell Labs in 1996 and continued research on carbon nanotubes and graphene.

via The New York Times|
#bell-labs#louis-brus#nanoscience
Physicists Harness 13,000 Nuclear Spins to Unlock 'Dark State' Power
science8 months ago

Physicists Harness 13,000 Nuclear Spins to Unlock 'Dark State' Power

Physicists have entangled 13,000 nuclear spins in gallium arsenide quantum dots to create a stable 'dark state' for quantum information storage, advancing quantum network nodes and communication technology. This collective entanglement improves data retention and resistance to noise, paving the way for scalable quantum devices and long-distance quantum communication. The research highlights the potential of many-body physics in developing reliable quantum systems.

via Earth.com|
#dark-state#nuclear-spins#quantum-communication
"MIT Researchers Uncover Neutrons Binding to Quantum Dots in Groundbreaking Discovery"
science1 year ago

"MIT Researchers Uncover Neutrons Binding to Quantum Dots in Groundbreaking Discovery"

MIT researchers have discovered that neutrons can be made to cling to quantum dots, forming artificial "neutronic molecules" held together by the strong force, which may lead to new tools for probing material properties at the quantum level and exploring quantum information processing devices. This unexpected finding could have applications in controlling individual neutrons for triggering reactions and developing quantum information systems, as well as in neutron imaging for materials analysis. The research was reported in the journal ACS Nano and was supported by the U.S. Office of Naval Research.

via MIT News|
#mit#neutrons#quantum-dots
"Non-Toxic Quantum Dots Enable Advanced Shortwave Infrared Image Sensors"
science-and-technology2 years ago

"Non-Toxic Quantum Dots Enable Advanced Shortwave Infrared Image Sensors"

Scientists have developed non-toxic quantum dots for shortwave infrared (SWIR) image sensors, making them ideal for use in service robotics, automotive, and consumer electronics. These quantum dots, made from non-toxic materials, were successfully integrated into a lab-scale photodetector and used to construct a proof-of-concept SWIR image sensor. The sensors can capture images under adverse weather conditions, enable passive night vision, and peer inside opaque objects under SWIR light, with potential applications in machine vision, bioimaging, and environmental sensing.

via Ars Technica|
#consumer-electronics#image-sensors#non-toxic-materials
"Sharp Unveils Secret QDEL TV at CES"
technology2 years ago

"Sharp Unveils Secret QDEL TV at CES"

At CES 2024, Sharp Display Technology Corporation quietly revealed the first working prototypes of a QDEL TV, which uses Quantum Dot Electroluminescent technology to potentially offer the benefits of OLED TVs without their weaknesses. The prototypes, a 12-inch display and a 30-inch model, demonstrate that QDEL technology can scale up to larger sizes. Sharp claims that the manufacturing process for QDEL TVs is similar to LED TVs, hinting at potential cost advantages. While mass manufacturing timelines remain undisclosed, the development of QDEL TVs for household use is now underway, with potential applications in smartphones, smartwatches, and computer monitors.

via Digital Trends|
#ces-2024#oled#qdel-tv
Astronaut Displays Nobel Prize in Space, Discusses Quantum Dots Experiment
space2 years ago

Astronaut Displays Nobel Prize in Space, Discusses Quantum Dots Experiment

Nobel laureate Moungi Bawendi, known for his work with quantum dots, spoke to the International Space Station (ISS) about his research and the ongoing quantum experiment being conducted on the ISS. The experiment, called MISSE-18-NASA, aims to test the stability of quantum dots in space. Bawendi discussed the unpredictable nature of scientific experiments and the adventure of discovery. Astronaut Andreas Mogensen also showcased the Nobel Prize medal of Danish physicist Niels Bohr, which is currently on the ISS. The medal was loaned from the Museum of National History in Denmark and is a symbol of humankind's curiosity and passion for exploration.

via Space.com|
#chemistry#experiment#international-space-station
ISS Astronaut Engages in Conversation with Nobel Prize Winners
space2 years ago

ISS Astronaut Engages in Conversation with Nobel Prize Winners

Nobel Prize winners Ferenc Krausz and Moungi Bawendi will have a conversation with astronauts Andreas Mogensen and Marcus Wandt, one of whom is aboard the International Space Station (ISS), in an event organized by the Nobel Prize Museum. The conversation will focus on the importance of basic science, expanding knowledge about the universe, and the challenges of conducting experiments in space. Krausz won the Nobel Prize in Physics for his work on attosecond-scale pulses of light, while Bawendi won the Nobel Prize in Chemistry for his applications of quantum dots. The event will be livestreamed from the Nobel Prize Museum in Stockholm.

via Space.com|
#attosecond-scale-pulses#european-space-agency#international-space-station
Unveiling the Potential of Quantum Noise for Data Extraction and Prediction
science-and-technology2 years ago

Unveiling the Potential of Quantum Noise for Data Extraction and Prediction

Researchers at the University of Duisburg-Essen have developed a method for extracting data from noisy signals, which could have implications for quantum computers. By analyzing the noise generated by a quantum dot sample exposed to an exciting laser, the researchers were able to determine the lifetime of spin states. This technique allows for the re-evaluation of older data and the discovery of previously hidden signals.

via Phys.org|
#data-extraction#noise#quantum-computers
From Lab to Market: The Journey of Quantum Dots, as Told by a Nobel Laureate
science-and-technology2 years ago

From Lab to Market: The Journey of Quantum Dots, as Told by a Nobel Laureate

Physical chemist Louis Brus, one of the Nobel laureates for the discovery and synthesis of quantum dots, discusses the accidental discovery of these nanoparticles and their unique properties. Quantum dots are tiny particles that emit light at different wavelengths depending on their size. Brus explains the challenges in observing quantum dots and the importance of collaboration with fellow laureates Alexei Ekimov and Moungi Bawendi. He highlights the applications of quantum dots in biological imaging and display technology, and emphasizes the significance of basic research in solving mysteries and driving technological advancements. Brus also shares his thoughts on winning the Nobel Prize and the advice he received from past laureates.

via The Conversation|
#basic-research#industry-application#nanoparticles
Unsung Scientists Behind Nobel-Winning Quantum Dots: Their Remarkable Journey
science-and-technology2 years ago

Unsung Scientists Behind Nobel-Winning Quantum Dots: Their Remarkable Journey

The unsung scientists behind the Nobel Prize in Chemistry for quantum dots, Moungi Bawendi, Louis Brus, and Alexei Ekimov, share their experiences and contributions to the groundbreaking research. Collaborators, postdoctoral fellows, and graduate students played a crucial role in realizing the vision of the Nobel laureates. The researchers developed a strategy to synthesize quantum dots in a controlled manner, leading to the understanding of their behavior and applications. Quantum dots have since found commercial use in various fields, including television displays, lighting, and medical diagnostics. Many of the scientists involved have gone on to connect their expertise with industry applications, while others continue to explore the quantum nature of optical excitations for potential advancements in quantum computing, sensing, and communication.

via Nature.com|
#applications#chemistry#collaborative-research