Nano-motors of micron-meter size, made of platinum and gold, propel themselves against a flow (big arrows on channel walls) that contains hydrogen peroxide. Random thermal jiggling from the fluid molecules disturbs the motors motion, but the long-gold motors (pullers) still maintains a relatively straight trajectory because its steeper tilt helps it align more easily against the flow and hence move upstream. Credit: Dr. Yan-Peng Liu
Going upstream, and against a current, involves a front-first downward tilt and then moving along a surface, shows new research by a team of scientists, which created nano-motors to uncover this effective means of locomotion under such conditions. Its findings and the creation of these tiny motors offer new insights into the nature of movement in fluids and have implications for engineering.
These nano-motors not only helped us better understand the nature of moving against flows at the tiny scales we cant easily see, but also could be the first step in developing smart material and robotic systems in the microscopic world, says Jun Zhang, a professor of physics and mathematics at New York University and a co-author of the paper, which was published on October 25, 2019, in the journal Physical Review Letters.
While this effect of movement has long been known, our work offers a comprehensive explanation for it, which enhances our understanding of this widespread dynamic, adds co-author Michael Shelley, a professor at NYUs Courant Institute of Mathematical Sciences.
The researchers, who also included Quentin Brosseau, a postdoctoral fellow at NYUs Courant Institute and the papers first author, focused on a previously discovered phenomenon, rheotaxismovement involving a change of direction to head upstream or into a current.
However, detailed explanations for rheotaxis had been lacking. To fully understand this process, the scientists created nano-motors composed of two metalsplatinum and gold (Pt/Au). Shelley, Zhang, also a professor at NYU Shanghai, and their colleagues had previously created a more basic version of these nano-motors, which are less than the width of a human hair.
Fabricated in the Molecular Design Institute in NYUs Department of Chemistry, the motors described in the Physical Review Letters paper were more advanced; the researchers varied the proportions of these metals in order to vary their movementin some models, the composition was evenly split while others had a 3:1 gold-to-platinum ratio or a 3:1 platinum-to-gold make-up.
Fueled chemically by a hydrogen peroxide dilution when placed in water, the nano-motors could swimwith the platinum end always serving as the head. However, these motors had different tilts, which differed depending on their make-up. Those composed primarily of gold were labeled pullers while those largely made up of platinum were called pushers. The pullers tended to move with their tails up (a pronounced tilt) while the pushers remained relatively flat.
This difference was significant when it came to moving against currents.
When the tilt is large (pullers), the tail is more exposed to an oncoming flow, which catches the tail and turns the motor aroundsimilar to the way wind turns a weather vane. Consequently, the motors front faces the flow, after which the motor continues forward, now moving against the current. By contrast, if the motor is not tilted (pushers), a current cannot catch its tail and spin it around to move against this flowand, as a result, it is unlikely to respond to an oncoming flow.
This synthetic system mimics natural micro-organisms, such as E. coli in flow, and offers a means for predicting their pathways through the human body, observes Brosseau. It is key to understand contamination processes and engineer smart material for targeted drug delivery.
Reference: Relating Rheotaxis and Hydrodynamic Actuation using Asymmetric Gold-Platinum Phoretic Rods by Quentin Brosseau, Florencio Balboa Usabiaga, Enkeleida Lushi, Yang Wu, Leif Ristroph, Jun Zhang, Michael Ward and Michael J. Shelley, 25 October 2019, Physical Review Letters.DOI: 10.1103/PhysRevLett.123.178004
The papers other authors included Michael Ward, a professor in NYUs Department of Chemistry, Florencio Balboa Usabiaga of the Flatiron Institute, Enkeleida Lushi of the New Jersey Institute of Technology, Yang Wu, a doctoral candidate in NYUs Department of Chemistry, and Leif Ristroph, an associate professor at NYUs Courant Institute.
This work was supported by the MRSEC Program of the National Science Foundation (DMR-1420073) and also by additional NSF grants (DMS-1463962 and DMS-1620331).
See more here:
- Elon Musk's million-mile battery: What it really means - Los Angeles Times - September 23rd, 2020
- Politecnico di Milano: Project for innovation in Nanotechnology is the winner of ERC Starting grant - Science Business - September 23rd, 2020
- Fruit flies' protective corneal coatings reproduced | Research - Chemistry World - September 23rd, 2020
- Dr. Joseph Kaplun, Seasoned Technology Leader to Become Nano Dimension's CTO-Materials and VP of R&D and Product Development - StreetInsider.com - September 23rd, 2020
- Toy Insider unveils its Hot 20 List of the year's most wished-for toys - FOX43.com - September 23rd, 2020
- Thin and ultra-fast photodetector sees the full spectrum - Science Codex - September 23rd, 2020
- DiOX carbon free DWR and anti-viral treatments launch in Turkey - Innovation in Textiles - September 23rd, 2020
- New Thin and Ultra-Fast Photodetector can See the Full Spectrum of Light - AZoOptics.com - September 23rd, 2020
- Politecnico di Milano: Project for innovation in Nanotechnology is the winner of ERC Starting grant - Science Business - September 18th, 2020
- French Exotrail signs two contracts with ESA and stays on track for its electric propulsion mission - SpaceWatch.Global - September 18th, 2020
- Kanazawa University research: Potential drug treatment for particular type of lung-cancer - PRNewswire - September 18th, 2020
- DiOX carbon free DWR and anti-viral treatments launch in Turkey - Innovation in Textiles - September 18th, 2020
- Could Tattoo Ink Be Used to Detect Cancer? - Smithsonian Magazine - September 18th, 2020
- Simulation Software Market Key Drivers, Business Insights, Trends And Forecast 2026 Altair Engineering, Inc., Bentley Systems, Ansys, Inc, Ptc - The... - September 18th, 2020
- Faculty and Staff Achievements Summer 2020 - CSUN Today - September 18th, 2020
- Diomics Announces Agreement With Department of Defense to Accelerate Development and Testing of Diocheck SARS-CoV-2 Immune Response Indicator Patch -... - September 18th, 2020
- Ashok Leyland, Hindustan Zinc team up with IIT-M to develop Zinc air battery - BusinessLine - September 18th, 2020
- The next generation of American nuclear - Power Technology - September 18th, 2020
- Cloth masks are effective at reducing virus transmission because it spreads in respiratory droplets, which are larger than smoke particles and the... - September 18th, 2020
- Build your own robots with this kit on sale for $50.15 - Mashable - September 6th, 2020
- Phase engineering and the final frontier! - Advanced Science News - September 6th, 2020
- The Role of Electron Microscopy in Battery Research - AZoM - September 6th, 2020
- Copper-coated face masks could help slow transmission of COVID-19: U of T researchers - News@UofT - September 6th, 2020
- Impact Of Covid-19 on Graphene Market 2020 Industry Challenges, Business Overview and Forecast Research Study 2026 - Owned - September 6th, 2020
- Nano Gas Sensors Market 2020 Growth Opportunities and Revenue Statistics to 2025 By Top Players | Raytheon Company, Ball Aerospace and Technologies,... - September 4th, 2020
- Surgical Instruments Tracking Systems Market Predicted to Accelerate the Growth by 2018-2028 - Scientect - September 4th, 2020
- Food dyes, tattoo ink can be used to detect cancer: Study - BusinessLine - September 4th, 2020
- 3D Printed Implants Market: Growing Biomedical Applications of 3D Technology is Expected to Boost the Market - BioSpace - September 4th, 2020
- MIT partners with national labs on two new National Quantum Information Science Research Centers - MIT News - September 2nd, 2020
- A new platform for controlled delivery of key nanoscale drugs and more - MIT News - September 2nd, 2020
- Flexible Micro LEDs May Reshape Wearable Technology - Manufacturing Business Technology - September 2nd, 2020
- Carleton Faculty Receive CFI Funding to Support Research Benefiting All Canadians - Carleton Newsroom - September 2nd, 2020
- Nanotextiles Market Estimated size be driven size Innovation and Industrialization COVID-19 2024 - Chelanpress - August 10th, 2020
- Lecturer/Senior Lecturer in Internet of Things job with CRANFIELD UNIVERSITY | 218434 - Times Higher Education (THE) - August 8th, 2020
- The End of an Era as Tata Motors Prepare To Sell Their Passenger Car Business - Moneylife - August 8th, 2020
- OPINION: Carbon tax and its impact on India - ETEnergyworld.com - August 8th, 2020
- UNB professor working on a mask that would kill the coronavirus - CBC.ca - August 7th, 2020
- From birds to burrs, here are four examples of biomimicry at work - create digital - August 7th, 2020
- Lindsay McCormick of Bite Toothpaste Bits Named in Fast Company's Annual List of the Most Creative People in Business - PR Web - August 7th, 2020
- 3D mapping reveals how wounds begin to heal - Futurity: Research News - August 7th, 2020
- Production linked incentive scheme to be expanded to AC, furniture, leather sectors as MEIS wound up - Moneylife - August 6th, 2020
- The UK's Huawei ban risks crippling its ambitions in technology and science - Business Insider - August 5th, 2020
- Stocks in the news: YES Bank, DMart, Infosys, BHEL, Tata Motors and Apollo Hospitals - Economic Times - August 4th, 2020
- Global Nanosensors Market Huge Growth CAGR of 90.1% by 2026 | With Top Players- Linear Technologies, NXP Semiconductor, InvenSense, Knowles, Analog... - August 3rd, 2020
- Shaft Measuring Machine Market Business Overview, Revenue, Price and Gross Margin, Product Specifications, Forecast 2025 - Owned - August 3rd, 2020
- Virtual field trips, digital labs and global colleagues: U of T students to explore the world this fall - News@UofT - August 2nd, 2020
- Not all face masks are created equal 7 things to consider to protect yourself - CNA - August 2nd, 2020
- Interview and photos: Renowned inventor and artist Tom Shannon's first Oklahoma exhibit is on view at Science Museum Oklahoma - Oklahoman.com - August 2nd, 2020
- LaunchDarkly Hosting Trajectory Conference as a Live Streaming Interactive Event - PR Web - August 2nd, 2020
- Nano Satellites Market Size, Share, Application Analysis, Regional Outlook, Growth Trends, Key Players, Competitive Strategies and Forecasts to 2026 -... - July 31st, 2020
- Kanazawa University research: Diverse amyloid structures and dynamics revealed by high-speed atomic force microscopy - PRNewswire - July 31st, 2020
- Researchers Uncover How Cells Interact With Supporting Proteins To Heal Wounds - Technology Networks - July 30th, 2020
- Catheters Market Size Estimation, COVID-19 Impact, Emerging Trends, Key Players, Share Value and Global Industry Insights By 2023 - Reported Times - July 30th, 2020
- Nano will be my ultimate professional fulfilment: IFFCO MD - Indian Cooperative - July 29th, 2020
- NeoPhotonics and Inphi Complete the First Successful Interoperability Demonstration of 400ZR Over 120km - Business Wire - July 29th, 2020
- The Tech Analyst Who Screamed Buy TSM at $50! - Yahoo Finance - July 28th, 2020
- Brand Datsun and the road ahead in India - BusinessLine - July 26th, 2020
- This is the Tata Aria, a Two-Door Convertible Concept from 2000 - Car Blog India - July 26th, 2020
- New Nano Drug Candidate Kills Aggressive Breast Cancer Cells - University of Arkansas Newswire - July 25th, 2020
- Research Associate - SecuReFET: Secure Circuits through inherent Reconfigurable FET job with TECHNISCHE UNIVERSITAT DRESDEN (TU DRESDEN) | 214467 -... - July 25th, 2020
- Mark McDaniel reappointed to NASA Human Exploration and Operations Advisory Committee - alreporter.com - July 24th, 2020
- Aerostructure Equipment Industry Tremendous Growth and Shares 2019 to 2027, Noted Fact.MR - The Cloud Tribune - July 23rd, 2020
- Nano Gas Sensor Market which company is the market leader and how much its sales in 2020 and what it's expected sales for the next 5 years | Raytheon... - July 23rd, 2020
- How Do CNTFETs Work, and Why Are They So Promising? - ENGINEERING.com - July 23rd, 2020
- Plasma Enhanced CVD Equipment Market Overview, Growth Opportunities, Industry Analysis, Size, Strategies and Forecast to 2026 | Applied Materials, ASM... - July 23rd, 2020
- Outlook on the Electrical Discharge Machines Global Market to 2027 - Featuring AAEDM, AccuteX Technologies & Beaumont Machine Among Others -... - July 22nd, 2020
- What is Nanoengineering? (with pictures) - July 21st, 2020
- B.S. NanoEngineering | NanoEngineering - July 21st, 2020
- What does a nanotechnology engineer do? CareerExplorer - July 21st, 2020
- USABC awards $2.4M contract to WPI for development of low-cost/fast-charge batteries for EV applications - Green Car Congress - July 21st, 2020
- 3D Printing Healthcare Market to Record a Robust Growth Rate for the COVID-19 Period - Cole of Duty - July 21st, 2020
- Lasers and sticky tape triple lithium metal battery life - Futurity: Research News - July 21st, 2020
- Tiny particles, big solutions - The Hindu - July 20th, 2020
- MRSEC wins major new grant from the National Science Foundation - Brandeis University - July 20th, 2020
- The best and worst choices for a cloth face mask - Times Union - July 20th, 2020
- Synthetic Biology Market (2019-2025) with COVID-19 After Effects Analysis by Emerging Trends, Industry Demand, Growth, Key Players - Jewish Life News - July 20th, 2020
- Research Assistant or Research Fellow in Electromagnetic Actuation job with CRANFIELD UNIVERSITY | 213886 - Times Higher Education (THE) - July 20th, 2020
- Targeting brain metastases with ultrasmall theranostic nanoparticles, a first-in-human trial from an MRI perspective - Science Advances - July 20th, 2020
- Lawrence Livermore National Laboratory and Tyvak Nano-Satellite Systems Announce Agreement to Develop Innovative Telescopes for Nanosatellites -... - July 19th, 2020
- Viewed through revamped slide, cancer cells show their hidden side : The Asahi Shimbun - Asahi Shimbun - July 19th, 2020