Nav: Home

New type of curved acoustic beams to provide manipulations with nanoparticles

January 27, 2020

Previously, scientists knew only one type of curved optical rays - Airy beams and their derivatives. They were obtained back in 2007. Due to their physical properties, the beams can be used for manipulating the small particles, which can be applied in microfluidics and cell biology. Obtaining such beams requires advanced equipment. Therefore, researchers from all around the world are looking for new types of curved beams that could be obtained much easier.

"Principles of obtaining new curved beams is an interesting and promising research field for both fundamental and applied areas. In 2018, our team theoretically predicted the existence of a new type of curved hook-like self-accelerating light beam. We named it a photonic hook, which is a curved electromagnetic wave. After that, we wondered if such curved beams could be obtained from an acoustic wave? Our new study positively responded to this challenge. We can obtain this beam incomparably easier than Airy beams," Igor Minin, the head of the project and professor of the TPU Division for Electronic Engineering, says.

To generate an acoustical hook, the researchers used a microparticle made of Rexolite dielectric material with an asymmetric shape. This particle was placed in water during experiments and irradiated with ultrasound. Passing through a particle of this shape, a sound wave was curved in the shape of a hook at the exit from the particle. The experiments were carried out at the Polytechnic University of Valencia (Spain).

"Today, the main application of acoustical hooks is biomedicine, synthesis of new materials, manipulation of nanoparticles using ultrasound with high sub-wave accuracy.

They can be used where other types of curved acoustic beams such as Airy cannot. In the future, we plan to carry out experiments and try to use acoustic hooks directly for particle manipulations, " Igor Minin says.
-end-
The research was partially supported by the Russian Foundation for Basic Research and by Tomsk Polytechnic University Competitiveness Enhancement Program.

Tomsk Polytechnic University

Related Ultrasound Articles:

PLUS takes 3D ultrasound images of solids
A two-in-one technology provides 3D images of structural defects, such as those that can develop in aircraft and power plants.
Scientists develop noninvasive ultrasound neuromodulation technique
Researchers from the Shenzhen Institutes of Advanced Technology (SIAT) of the Chinese Academy of Sciences developed a noninvasive ultrasound neuromodulation technique, which could potentially modulate neuronal excitability without any harm in the brain.
World's first ultrasound biosensor created in Australia
Most implantable monitors for drug levels and biomarkers invented so far rely on high tech and expensive detectors such as CT scans or MRI.
Ultrasound can make stronger 3D-printed alloys
A study just published in Nature Communications shows high frequency sound waves can have a significant impact on the inner micro-structure of 3D printed alloys, making them more consistent and stronger than those printed conventionally.
Full noncontact laser ultrasound: First human data
Conventional ultrasonography requires contact with the patient's skin with the ultrasound probe for imaging, which causes image variability due to inconsistent probe contact pressure and orientation.
Ultrasound aligns living cells in bioprinted tissues
Researchers have developed a technique to improve the characteristics of engineered tissues by using ultrasound to align living cells during the biofabrication process.
Ultrasound for thrombosis prevention
Researchers established real-time ultrasonic monitoring of the blood's aggregate state using the in vitro blood flow model.
Ultra ultrasound to transform new tech
A new, more sensitive method to measure ultrasound may revolutionize everything from medical devices to unmanned vehicles.
Shoulder 'brightness' on ultrasound may be a sign of diabetes
A shoulder muscle that appears unusually bright on ultrasound may be a warning sign of diabetes, according to a new study.
Ultrasound-firewall for mobile phones
Mobile phones and tablets through so-called audio tracking, can be used by means of ultrasound to unnoticeably track the behaviour of their users: for example, viewing certain videos or staying in specific rooms and places.
More Ultrasound News and Ultrasound Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: The Power Of Spaces
How do spaces shape the human experience? In what ways do our rooms, homes, and buildings give us meaning and purpose? This hour, TED speakers explore the power of the spaces we make and inhabit. Guests include architect Michael Murphy, musician David Byrne, artist Es Devlin, and architect Siamak Hariri.
Now Playing: Science for the People

#576 Science Communication in Creative Places
When you think of science communication, you might think of TED talks or museum talks or video talks, or... people giving lectures. It's a lot of people talking. But there's more to sci comm than that. This week host Bethany Brookshire talks to three people who have looked at science communication in places you might not expect it. We'll speak with Mauna Dasari, a graduate student at Notre Dame, about making mammals into a March Madness match. We'll talk with Sarah Garner, director of the Pathologists Assistant Program at Tulane University School of Medicine, who takes pathology instruction out of...
Now Playing: Radiolab

What If?
There's plenty of speculation about what Donald Trump might do in the wake of the election. Would he dispute the results if he loses? Would he simply refuse to leave office, or even try to use the military to maintain control? Last summer, Rosa Brooks got together a team of experts and political operatives from both sides of the aisle to ask a slightly different question. Rather than arguing about whether he'd do those things, they dug into what exactly would happen if he did. Part war game part choose your own adventure, Rosa's Transition Integrity Project doesn't give us any predictions, and it isn't a referendum on Trump. Instead, it's a deeply illuminating stress test on our laws, our institutions, and on the commitment to democracy written into the constitution. This episode was reported by Bethel Habte, with help from Tracie Hunte, and produced by Bethel Habte. Jeremy Bloom provided original music. Support Radiolab by becoming a member today at Radiolab.org/donate.     You can read The Transition Integrity Project's report here.