• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • CONTACT US
Monday, January 30, 2023
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • CONTACT US
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • CONTACT US
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

Nanoantennas directing a bright future

Bioengineer by Bioengineer
December 21, 2022
in Chemistry
Reading Time: 3 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

Kyoto, Japan — White LEDs may soon be dethroned as the world’s go-to light source by an alternative with a much better sense of direction. 

Brighter future with nanoantenna phosphor

Credit: KyotoU/Shunsuke Murai

Kyoto, Japan — White LEDs may soon be dethroned as the world’s go-to light source by an alternative with a much better sense of direction. 

As a next-generation optical control technology, a photonic crystal or nanoantenna is a two-dimensional structure in which nano-sized particles are arranged periodically on a substrate. Upon irradiation, the combination of a nanoantennawith a phosphor plate achieves an ideal mix of blue and yellow light.

White LEDs have already been improved upon in the form of white laser diodes, or LDs, which consist of yellow phosphors and blue LDs. While the blue LDs are highly directional, the yellow phosphors radiate in all directions, resulting in an undesired mixing of colors. 

To address this issue, researchers have developed phosphor plates combined with nanoantennas using metallic aluminum, enabling increased photoluminescence. Aluminum nanoparticles effectively scatter light and improve light intensity and directionality; however, aluminum also absorbs light, reducing the output. This is a major bottleneck, especially in high-intensity lighting applications.

Now, a team of researchers at Kyoto University has achieved a ten-fold enhancement of forward-directed photoluminescence by replacing aluminum with a better material.

“It turns out that titanium dioxide is a better choice for its high refractive index and low-light absorption,” says lead author Shunsuke Murai. 

Although the light-scattering intensity of titanium oxide initially appeared inferior to metallic aluminum, the team used computer simulations to devise the optimal nanoantenna design. 

“The new nanoantenna phosphors are advantageous for intensely bright yet energy-saving solid-state lighting because they can suppress temperature rise when irradiated,” explains Murai.

“During the process of finding the optimal dimensions, we were surprised to discover that the thinnest phosphors gave the brightest photoluminescence, demonstrating how to increase the forward radiation intensity and overall performance.”

###

The paper “Photoluminescence Engineering with nanoantenna phosphors” appeared on 21 December 2022 in Journal of Materials Chemistry C, with doi: 10.1039/d2tc03076d

About Kyoto University

Kyoto University is one of Japan and Asia’s premier research institutions, founded in 1897 and responsible for producing numerous Nobel laureates and winners of other prestigious international prizes. A broad curriculum across the arts and sciences at both undergraduate and graduate levels is complemented by numerous research centers, facilities, and offices around Japan and the world. For more information, please see: http://www.kyoto-u.ac.jp/en



Journal

Journal of Materials Chemistry C

DOI

10.1039/d2tc03076d

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Photoluminescence Engineering with nanoantenna phosphors

Article Publication Date

21-Dec-2022

COI Statement

The authors declare no conflict of interest.

Share12Tweet8Share2ShareShareShare2

Related Posts

Katerina Mastovska

Dr. Katerina Mastovska named AOAC INTERNATIONAL Deputy Executive Director and Chief Science Officer

January 27, 2023
magnetar eruption

Volcano-like rupture could have caused magnetar slowdown

January 27, 2023

Stability of perovskite solar cells reaches next milestone

January 27, 2023

From AI software to surgical robots

January 27, 2023

POPULAR NEWS

  • Jean du Terrail, Senior Machine Learning Scientist at Owkin

    Nature Medicine publishes breakthrough Owkin research on the first ever use of federated learning to train deep learning models on multiple hospitals’ histopathology data

    64 shares
    Share 26 Tweet 16
  • First made-in-Singapore antibody-drug conjugate (ADC) approved to enter clinical trials

    58 shares
    Share 23 Tweet 15
  • Metal-free batteries raise hope for more sustainable and economical grids

    41 shares
    Share 16 Tweet 10
  • One-pot reaction creates versatile building block for bioactive molecules

    37 shares
    Share 15 Tweet 9

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

A fairy-like robot flies by the power of wind and light

UK’s Overseas Territories at ongoing risk from wide range of invasive species

World-first guidelines created to help prevent heart complications in children during cancer treatment

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 43 other subscribers
  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In