Close Menu
  • News
  • Medical
  • Technology
  • Nanomaterials
  • Research
  • Blog
    • Nasiol.com
  • Contact
    • Tech7685@gmail.com
What's Hot

Microbubble dynamics in boiling water enable precision fluid manipulation

May 9, 2025

Unique molecule may lead to smaller, more efficient computers

May 9, 2025

Depositing quantum dots on corrugated chips improves photodetector capabilities

May 8, 2025
Facebook X (Twitter) Instagram
Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily
  • News
  • Medical
  • Technology
  • Nanomaterials
  • Research
  • Blog
    • Nasiol.com
  • Contact
    • Tech7685@gmail.com
Facebook X (Twitter) Instagram
Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily Nanotech – Nanomaterials | Medical | Research | News Stories Updated Daily
Home»News»Researchers achieve >99% photoluminescence quantum yield in metal nanoclusters
News

Researchers achieve >99% photoluminescence quantum yield in metal nanoclusters

March 25, 2024No Comments2 Mins Read
Facebook Twitter Pinterest Telegram LinkedIn Tumblr WhatsApp Email
Researchers achieve >99% photoluminescence quantum yield in metal nanoclusters
Share
Facebook Twitter LinkedIn Pinterest Telegram Email
Molecular structures of Au22 and Au16Cu6 and structure anatomy of Au16Cu6. Credit: Prof. Zhou’s team

A research team has achieved near-unity room-temperature photoluminescence quantum yield (PLQY) (>99%) in the near-infrared (NIR) emission of metal nanoclusters in solution. Their work is published in Science.

Gold nanoclusters (Au NCs) as NIR-emissive materials hold potential in biomedical applications. However, the PLQY of Au NCs in the NIR region is typically low, often less than 10%. To address this problem, researchers synthesized Au22(tBuPhC≡C)18(Au22) and its copper-doped counterpart, Au16Cu6(tBuPhC≡C)18 (Au16Cu6), to study their photophysical properties.

Single-crystal X-ray diffraction analysis revealed that Au22 and Au16Cu6 share similar structures. Au22 showed an emission peak at 690 nm and Au16Cu6 at 720 nm. The absolute PLQY of Au22 and Au16Cu6 in air were 9% and 95%, respectively.

In the deaerated solution, the PLQY of Au16Cu6 reached 100%, measured by both absolute and relative methods. Time-correlated single-photon counting measured the photoluminescence lifetimes of Au22 and Au16Cu6 to be 485 ns and 1.64 μs, respectively.

Further investigation of NCs’ excited-state dynamics through transient-absorption spectroscopy revealed that both NCs’ luminescent states originated from the triplet state (T1), with distinct dynamic processes observed in femtosecond transient-absorption spectroscopy. Under 380 nm excitation, Au22 showed a slow rise of 148 ps, while Au16Cu6 showed a rapid relaxation of 0.5 ps.

Triplet sensitization experiments confirmed that these processes are attributed to ultrafast intersystem crossing (ISC) from singlet state (S1) to T1. Due to copper doping, Au16Cu6 has a smaller ∆Est, significantly accelerating its ISC rate. As a result, Au16Cu6 ultimately showcases PLQY close to 100%.

See also  New blood test evaluates nanomedicines for safer, personalized cancer treatment

The approach to achieve near-unity PLQY could enable the development of highly emissive metal cluster materials. Specifically, this work demonstrates that near-unity PLQY can be attained with an alloy of gold-copper nanoclusters even in solution at room temperature, which will enable applications ranging from biological imaging to luminescent devices.

The research team included Prof. Zhou Meng’s group from the University of Science and Technology of China of the Chinese Academy of Sciences (CAS), collaborating with Prof. Wang Quanming’s team from Tsinghua University.

Provided by
University of Science and Technology of China


Source link

achieve metal nanoclusters photoluminescence quantum Researchers yield
Share. Facebook Twitter Pinterest LinkedIn Tumblr Email

Related Posts

Microbubble dynamics in boiling water enable precision fluid manipulation

May 9, 2025

Unique molecule may lead to smaller, more efficient computers

May 9, 2025

Depositing quantum dots on corrugated chips improves photodetector capabilities

May 8, 2025

Ultrasonic nanocrystal surface modification restores stainless steel’s corrosion resistance

May 7, 2025

Structure dictates effectiveness and safety in nanomedicine, driving therapeutic innovation, say scientists

May 7, 2025

How Can Nanomaterials Be Programmed for Different Applications?

May 6, 2025

Comments are closed.

Top Articles
News

Scientists merge two ‘impossible’ materials into new artificial structure

Medical

Griffith University researchers develop new method to control virus assembly

News

Researchers develop a roadmap for the development of information technology based on 2D materials

Editors Picks

Microbubble dynamics in boiling water enable precision fluid manipulation

May 9, 2025

Unique molecule may lead to smaller, more efficient computers

May 9, 2025

Depositing quantum dots on corrugated chips improves photodetector capabilities

May 8, 2025

Ultrasonic nanocrystal surface modification restores stainless steel’s corrosion resistance

May 7, 2025
About Us
About Us

Your go-to source for the latest nanotechnology breakthroughs. Explore innovations, applications, and implications shaping the future at the molecular level. Stay informed, embrace the nano-revolution.

We're accepting new partnerships right now.

Facebook X (Twitter) Instagram Pinterest
Our Picks

Researchers develop cutting-edge smart bandages for improved wound healing

June 18, 2024

“Laboratory testicles” could solve male infertility mysteries

February 21, 2024

Siloxane-enhanced nanoparticles unlock precise organ targeting for mRNA therapy

October 10, 2024

Subscribe to Updates

Get the latest creative Nano Tech news from Elnano.com

© 2025 Elnano.com - All rights reserved.
  • Contact
  • Privacy Policy
  • Terms & Conditions

Type above and press Enter to search. Press Esc to cancel.

Cleantalk Pixel