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»Nanomaterials»Nanoparticles enhance locusts’ sense of smell
Nanomaterials

Nanoparticles enhance locusts’ sense of smell

February 21, 2024No Comments4 Mins Read
Facebook Twitter Pinterest Telegram LinkedIn Tumblr WhatsApp Email
Nanoparticles enhance locusts’ sense of smell
Share
Facebook Twitter LinkedIn Pinterest Telegram Email

Illustration showing nanoparticles in a locust
Hot spots: this photo composition has a locust (centre) showing the location of the nanoparticles (left), which are illuminated by near-infrared light (illustrated in red). (Courtesy: Singamaneni Lab/Washington University)

Using specially engineered nanoparticles, a team of US researchers has artificially enhanced the sense of smell in locusts. Led by Srikanth Singamaneni and Barani Raman at Washington University in St Louis, the researchers’ approach could lead to a new type of biological chemical sensors.

Many different animals have evolved a sense of smell that vastly outperforms our own. Even today, the latest designs of chemical sensor have yet to catch up with the sensitivity of biological olfactory systems, as well as their ability to distinguish between subtly different substances.

Recently, researchers have attempted to harness these abilities in biological chemical sensors. Initially, Singamaneni’s team planned to do this with locusts, which carry their olfactory apparatus in their antennae.

Biology does the hard work

“We let the biology do the harder job of converting information about vaporous chemicals into an electrical neural signal,” explains Raman. “These signals are detected in the insect antennae and are transmitted to the brain. We can place electrodes in the brain, measure the locusts’ neural response to odours, and use them as fingerprints to distinguish between chemicals.”

This approach quickly ran into difficulties, however. Without harming the insects, Singamaneni’s team found they were strictly limited both in the number of electrodes they could use, and in the regions where they could be placed. Ultimately, this meant that the neural signals they detected were far too weak for the system to act as a reliable chemical sensor.

To overcome this challenge, the researchers have explored how the locusts’ neural signals could be enhanced with the help of photothermal nanoparticles, which are extremely efficient at converting light into heat. “Heat affects diffusion – imagine adding cold milk to hot coffee,” Raman says. “The idea is to use the heat generated by nanostructures to locally heat and enhance neural activity.”

See also  'Plug and play' nanoparticles could make it easier to tackle various biological targets

In this case, the team examined how locally applied heat could be used to control the release of neurotransmitters. These are the molecules responsible for conveying electrical signals between neurons in the brain.

Melting wax

To achieve this, they started by encasing photothermal polydopamine nanoparticles in a porous silica coating. They then mixed the structure with a dye containing 1-tetradecanol. The latter is a waxy solid at room temperature, but melts at just 38 °C. Finally, they loaded the nanostructures with a neurotransmitter “cargo” and injected them into locust brains.

To test their approach, the team placed random arrays of electrodes on the locusts’ heads, and monitored their neural signals when they exposed them to different odours. When they detected neural signals, the team then fired a near-infrared laser in the place where the signals appeared.

The photothermal nanoparticles absorbed the near-infrared light and this heated the surrounding 1-tetradecanol above its melting point – releasing the structure’s neurotransmitter cargo into its immediate surroundings.

Enhanced sense of smell

With the temporary abundance of neurotransmitters, the locusts’ neural signals were temporarily amplified by a factor of 10. This improved the insects’ sense of smell and also boosted the locusts’ neural activity to levels that could be measured far more accurately by the team’s electrode arrays. This was the case even when they nanoparticles were not placed in optimal positions.

“Our study presents a generic strategy to reversibly enhance neural signals at the brain site where we place the electrodes,” Raman explains. When signal amplification was no longer required, the excess neurotransmitter molecules were simply broken down by natural enzymes. In the long term, the nanostructures will biodegrade, leaving the locusts unharmed.

See also  Blocking electromagnetic interference opens channels for optical communications

The researchers are confident that their approach could be a promising step towards a new generation of biological chemical sensors.

“It would change an existing passive approach – where information is simply read – into an active one, where the capabilities of neural circuits as a basis for information processing are fully used,” Raman explains. If achieved, this would both boost the sensitivity of chemical sensors, and improve their ability to differentiate between different chemicals.

The research is described in Nature Nanotechnology.

Source link

Enhance Locusts nanoparticles sense smell
Share. Facebook Twitter Pinterest LinkedIn Tumblr Email

Related Posts

Ultrasound-activated nanoparticles wipe out biofilm infections in lab tests

May 1, 2025

How gold nanoparticles may one day help to restore people’s vision

April 26, 2025

Engineers develop a way to mass manufacture nanoparticles that deliver cancer drugs directly to tumors

April 15, 2025

Bacteria-enhanced graphene oxide nanoparticles provide triple-action tumor eradication

April 14, 2025

Chemical oscillations in palladium nanoparticles could pave way for recycling precious metal catalysts

April 1, 2025

DNA-loaded lipid nanoparticles are poised to bring gene therapy to common chronic diseases

April 1, 2025

Comments are closed.

Top Articles
News

Researchers dynamically tune friction in graphene

Research

Merging Nature and Technology through 3D-Printed Cilia Sensors

News

Atomic pair catalyst converts methane to acetic acid with high efficiency

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

New method captures the stochastic dynamics in coherent X-ray imaging at the nanoscale

September 14, 2024

UCLA Study Challenges Long-Held Beliefs in Bioengineering and Stem Cell Dynamics

December 27, 2023

Spraying rice with sunscreen particles during heatwaves boosts growth

November 6, 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