Connect with us

Material Science

Harnessing the Potential of Open Data in Materials Science


In association with The NOMAD Laboratory, Mendeley and the Materials Project.

Harnessing the Potential of Open Data in Materials Science

For more information about these programmes please visit:

https://nomad-coe.eu/
https://materialsproject.org/
https://www.mendeley.com/ 

Register for this webinar by logging in or signing up below.

Browse our previous webinars, all free and on demand, here.

Openly available materials science data has the potential to revolutionize the discovery and development of new materials. In addition, open data fosters collaboration, reduces redundancy and improves reproducibility, making the most of available resources and boosting researcher output. Join Kristin Persson and Luca Ghiringhelli to discover the hows and whys of sharing materials science research data, and find out how to derive the most value from these data through the application of enhanced modelling and big data analytics software.

  • Learn the potential benefits of sharing data in materials science
  • Learn how to use tools to detect unseen patterns or structures in data and predict materials properties
  • Understand how large publicly funded initiatives are democratizing data in materials science and how you can use them

To read the detailed abstracts, please click here.

Speakers:

Dr Anita de Waard, Vice President, Research Data Collaborations, Elsevier.

Professor Kristin Persson, Associate Professor, UC Berkeley / Faculty Staff Lawrence Berkeley National Laboratory, USA.

Dr Luca Ghiringhelli, Group Leader, Fritz Haber Institute of the Max Planck Society, Berlin, Germany.

Joe d'Angelo, (Moderator), Materials Science Publisher, Elsevier.

 

For more information about these programmes please visit:

https://nomad-coe.eu/
https://materialsproject.org/
https://www.mendeley.com/

When you register for this webinar your registration details will be passed to the sponsor who will provide you with information relevant to this topic.

Republished by Plato

Published

on


In association with The NOMAD Laboratory, Mendeley and the Materials Project.

Harnessing the Potential of Open Data in Materials Science

For more information about these programmes please visit:

https://nomad-coe.eu/
https://materialsproject.org/
https://www.mendeley.com/ 

Register for this webinar by logging in or signing up below.

Browse our previous webinars, all free and on demand, here.

Openly available materials science data has the potential to revolutionize the discovery and development of new materials. In addition, open data fosters collaboration, reduces redundancy and improves reproducibility, making the most of available resources and boosting researcher output. Join Kristin Persson and Luca Ghiringhelli to discover the hows and whys of sharing materials science research data, and find out how to derive the most value from these data through the application of enhanced modelling and big data analytics software.

  • Learn the potential benefits of sharing data in materials science
  • Learn how to use tools to detect unseen patterns or structures in data and predict materials properties
  • Understand how large publicly funded initiatives are democratizing data in materials science and how you can use them

To read the detailed abstracts, please click here.

Speakers:

Dr Anita de Waard, Vice President, Research Data Collaborations, Elsevier.

Professor Kristin Persson, Associate Professor, UC Berkeley / Faculty Staff Lawrence Berkeley National Laboratory, USA.

Dr Luca Ghiringhelli, Group Leader, Fritz Haber Institute of the Max Planck Society, Berlin, Germany.

Joe d’Angelo, (Moderator), Materials Science Publisher, Elsevier.

For more information about these programmes please visit:

https://nomad-coe.eu/
https://materialsproject.org/
https://www.mendeley.com/

When you register for this webinar your registration details will be passed to the sponsor who will provide you with information relevant to this topic.

Source: https://www.materialstoday.com/computation-theory/webinars/harnessing-potential-open-data-materials-science/

Material Science

Weak force has strong impact on metal nanosheets


A transmission electron microscope image by Rice University scientists shows a silver nanosheet deformed by a particle, which forms flower-shaped stress contours in the nanosheet that indicate a bump. Image: The Jones Lab/Rice University.
A transmission electron microscope image by Rice University scientists shows a silver nanosheet deformed by a particle, which forms flower-shaped stress contours in the nanosheet that indicate a bump. Image: The Jones Lab/Rice University.

New research has revealed that the hills are alive with the force of van der Walls. Researchers at Rice University have found that nature's ubiquitous 'weak' force is sufficient to indent rigid nanosheets, extending their potential for use in nanoscale optics or catalytic systems.

Changing the shape of nanoscale particles changes their electromagnetic properties, said Matt Jones, an assistant professor of chemistry and an assistant professor of materials science and nanoengineering at Rice University. That makes the phenomenon worth further study.

"People care about particle shape, because the shape changes its optical properties," Jones said. "This is a totally novel way of changing the shape of a particle." He and his colleagues report their work in a paper in Nano Letters.

Van der Waals is a weak force that allows neutral molecules to attract one another through randomly fluctuating dipoles, or separated opposite charges, depending on distance. Though small, its effects can be seen in the macro world, like when geckos walk up walls.

"Van der Waals forces are everywhere and, essentially, at the nanoscale everything is sticky," Jones said. "When you put a large, flat particle on a large, flat surface, there's a lot of contact, and it's enough to permanently deform a particle that's really thin and flexible."

In the new study, the Rice team decided to see if this force could be used to manipulate 8nm-thick sheets of ductile silver. After a mathematical model suggested it was possible, the researchers placed 15nm-wide iron oxide nanospheres on a surface and then sprinkled prism-shaped nanosheets over them.

Without applying any other force, they saw through a transmission electron microscope that the nanosheets acquired permanent bumps where none existed before, right on top of the spheres. As measured, the distortions were about 10 times larger than the width of the spheres.

These hills weren't very high, but simulations confirmed that van der Waals attraction between the sheet and the substrate surrounding the spheres was sufficient to influence the plasticity of the silver sheet's crystalline atomic lattice. The researchers also showed that the same effect would occur in silicon dioxide and cadmium selenide nanosheets, and perhaps other compounds.

"We were trying to make really thin, large silver nanoplates and when we started taking images, we saw these strange, six-fold strain patterns, like flowers," said Jones, who earned a multiyear Packard Fellowship in 2018 to develop advanced microscopy techniques.

"It didn't make any sense, but we eventually figured out that it was a little ball of gunk that the plate was draped over, creating the strain," he said. "We didn't think anyone had investigated that, so we decided to have a look.

"What it comes down to is that when you make a particle really thin, it becomes really flexible, even if it's a rigid metal."

In further experiments, the researchers discovered that the nanospheres could be used to control the shape of the deformation, ranging from single ridges when two spheres are close together to saddle shapes or isolated bumps when the spheres are farther apart. They determined that sheets less than about 10nm thick and with aspect ratios of about 100 are most amenable to deformation.

In the paper, the researchers noted their technique creates "a new class of curvilinear structures based on substrate topography" that "would be difficult to generate lithographically". That opens up new possibilities for electromagnetic devices that are especially relevant to nanophotonic research. Straining the silver lattice could also turn the inert metal into a possible catalyst, by creating defects where chemical reactions can happen.

"This gets exciting because now most people make these kinds of metamaterials through lithography," Jones said. "That's a really powerful tool, but once you've used that to pattern your metal, you can never change it.

"Now we have the option, perhaps someday, to build a material that has one set of properties and then change it by deforming it. Because the forces required to do so are so small, we hope to find a way to toggle between the two."

This story is adapted from material from Rice University, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. Link to original source.

Republished by Plato

Published

on


A transmission electron microscope image by Rice University scientists shows a silver nanosheet deformed by a particle, which forms flower-shaped stress contours in the nanosheet that indicate a bump. Image: The Jones Lab/Rice University.
A transmission electron microscope image by Rice University scientists shows a silver nanosheet deformed by a particle, which forms flower-shaped stress contours in the nanosheet that indicate a bump. Image: The Jones Lab/Rice University.

New research has revealed that the hills are alive with the force of van der Walls. Researchers at Rice University have found that nature’s ubiquitous ‘weak’ force is sufficient to indent rigid nanosheets, extending their potential for use in nanoscale optics or catalytic systems.

Changing the shape of nanoscale particles changes their electromagnetic properties, said Matt Jones, an assistant professor of chemistry and an assistant professor of materials science and nanoengineering at Rice University. That makes the phenomenon worth further study.

“People care about particle shape, because the shape changes its optical properties,” Jones said. “This is a totally novel way of changing the shape of a particle.” He and his colleagues report their work in a paper in Nano Letters.

Van der Waals is a weak force that allows neutral molecules to attract one another through randomly fluctuating dipoles, or separated opposite charges, depending on distance. Though small, its effects can be seen in the macro world, like when geckos walk up walls.

“Van der Waals forces are everywhere and, essentially, at the nanoscale everything is sticky,” Jones said. “When you put a large, flat particle on a large, flat surface, there’s a lot of contact, and it’s enough to permanently deform a particle that’s really thin and flexible.”

In the new study, the Rice team decided to see if this force could be used to manipulate 8nm-thick sheets of ductile silver. After a mathematical model suggested it was possible, the researchers placed 15nm-wide iron oxide nanospheres on a surface and then sprinkled prism-shaped nanosheets over them.

Without applying any other force, they saw through a transmission electron microscope that the nanosheets acquired permanent bumps where none existed before, right on top of the spheres. As measured, the distortions were about 10 times larger than the width of the spheres.

These hills weren’t very high, but simulations confirmed that van der Waals attraction between the sheet and the substrate surrounding the spheres was sufficient to influence the plasticity of the silver sheet’s crystalline atomic lattice. The researchers also showed that the same effect would occur in silicon dioxide and cadmium selenide nanosheets, and perhaps other compounds.

“We were trying to make really thin, large silver nanoplates and when we started taking images, we saw these strange, six-fold strain patterns, like flowers,” said Jones, who earned a multiyear Packard Fellowship in 2018 to develop advanced microscopy techniques.

“It didn’t make any sense, but we eventually figured out that it was a little ball of gunk that the plate was draped over, creating the strain,” he said. “We didn’t think anyone had investigated that, so we decided to have a look.

“What it comes down to is that when you make a particle really thin, it becomes really flexible, even if it’s a rigid metal.”

In further experiments, the researchers discovered that the nanospheres could be used to control the shape of the deformation, ranging from single ridges when two spheres are close together to saddle shapes or isolated bumps when the spheres are farther apart. They determined that sheets less than about 10nm thick and with aspect ratios of about 100 are most amenable to deformation.

In the paper, the researchers noted their technique creates “a new class of curvilinear structures based on substrate topography” that “would be difficult to generate lithographically”. That opens up new possibilities for electromagnetic devices that are especially relevant to nanophotonic research. Straining the silver lattice could also turn the inert metal into a possible catalyst, by creating defects where chemical reactions can happen.

“This gets exciting because now most people make these kinds of metamaterials through lithography,” Jones said. “That’s a really powerful tool, but once you’ve used that to pattern your metal, you can never change it.

“Now we have the option, perhaps someday, to build a material that has one set of properties and then change it by deforming it. Because the forces required to do so are so small, we hope to find a way to toggle between the two.”

This story is adapted from material from Rice University, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. Link to original source.

Source: https://www.materialstoday.com/nanomaterials/news/weak-force-impact-metal-nanosheets/

Continue Reading

Material Science

Glass forming by metallic mixtures becomes clearer


Researchers at the University of Tokyo used computer simulations to model the effects of elemental composition on the glass-forming ability of metallic mixtures. Image: Institute of Industrial Science, the University of Tokyo.
Researchers at the University of Tokyo used computer simulations to model the effects of elemental composition on the glass-forming ability of metallic mixtures. Image: Institute of Industrial Science, the University of Tokyo.

Researchers from the Institute of Industrial Science at the University of Tokyo in Japan have used molecular dynamics calculations to simulate the glass-forming ability of metallic mixtures. They show that even small changes in composition can strongly influence the likelihood that a material will assume a crystalline versus a glassy state upon cooling. This work, reported in a paper in Science Advances, may lead to a universal theory of glass formation and cheaper, more resilient, electroconductive glasses.

Although a table might be set with expensive 'crystal' glasses, crystal and glass are actually two very different states that liquids, including liquid metals, can assume as they cool. A crystal has a defined three-dimensional lattice structure that repeats indefinitely, while glass is an amorphous solid that lacks long-range ordering.

Current theories of glass formation cannot accurately predict which metallic mixtures will 'vitrify' to form a glass and which will crystallize. A better, more comprehensive understanding of glass formation would be a great help when designing new recipes for mechanically tough, electrically conductive materials.

Now, researchers at the University of Tokyo have used computer simulations of three prototypical metallic systems to study the process of glass formation. "We found that the ability for a multi-component system to form a crystal, as opposed to a glass, can be disrupted by slight modifications to the composition," says first author Yuan-Chao Hu.

Stated simply, glass formation is the consequence of a material avoiding crystallization as it cools. This locks the atoms into a 'frozen' state before they can organize themselves into their energy-minimizing pattern. The researchers' simulations showed that a critical factor determining the rate of crystallization was the liquid-crystal interface energy.

The researchers also found that changes in elemental composition can lead to local atomic orderings that frustrate the process of crystallization, because these orderings are incompatible with the crystal's usual form. Specifically, these structures can prevent tiny crystals from acting as 'seeds' that nucleate the growth of ordered regions in the sample. In contrast with previous explanations, the scientists determined that the chemical potential difference between the liquid and crystal phases has only a small effect on glass formation.

"This work represents a significant advancement in our understanding of the fundamental physical mechanism of vitrification," says senior author Hajime Tanaka. "The results of this project may also help glass manufacturers design new multi-component systems that have certain desired properties, such as resilience, toughness and electroconductivity."

This story is adapted from material from the University of Tokyo, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. Link to original source.

Republished by Plato

Published

on


Researchers at the University of Tokyo used computer simulations to model the effects of elemental composition on the glass-forming ability of metallic mixtures. Image: Institute of Industrial Science, the University of Tokyo.
Researchers at the University of Tokyo used computer simulations to model the effects of elemental composition on the glass-forming ability of metallic mixtures. Image: Institute of Industrial Science, the University of Tokyo.

Researchers from the Institute of Industrial Science at the University of Tokyo in Japan have used molecular dynamics calculations to simulate the glass-forming ability of metallic mixtures. They show that even small changes in composition can strongly influence the likelihood that a material will assume a crystalline versus a glassy state upon cooling. This work, reported in a paper in Science Advances, may lead to a universal theory of glass formation and cheaper, more resilient, electroconductive glasses.

Although a table might be set with expensive ‘crystal’ glasses, crystal and glass are actually two very different states that liquids, including liquid metals, can assume as they cool. A crystal has a defined three-dimensional lattice structure that repeats indefinitely, while glass is an amorphous solid that lacks long-range ordering.

Current theories of glass formation cannot accurately predict which metallic mixtures will ‘vitrify’ to form a glass and which will crystallize. A better, more comprehensive understanding of glass formation would be a great help when designing new recipes for mechanically tough, electrically conductive materials.

Now, researchers at the University of Tokyo have used computer simulations of three prototypical metallic systems to study the process of glass formation. “We found that the ability for a multi-component system to form a crystal, as opposed to a glass, can be disrupted by slight modifications to the composition,” says first author Yuan-Chao Hu.

Stated simply, glass formation is the consequence of a material avoiding crystallization as it cools. This locks the atoms into a ‘frozen’ state before they can organize themselves into their energy-minimizing pattern. The researchers’ simulations showed that a critical factor determining the rate of crystallization was the liquid-crystal interface energy.

The researchers also found that changes in elemental composition can lead to local atomic orderings that frustrate the process of crystallization, because these orderings are incompatible with the crystal’s usual form. Specifically, these structures can prevent tiny crystals from acting as ‘seeds’ that nucleate the growth of ordered regions in the sample. In contrast with previous explanations, the scientists determined that the chemical potential difference between the liquid and crystal phases has only a small effect on glass formation.

“This work represents a significant advancement in our understanding of the fundamental physical mechanism of vitrification,” says senior author Hajime Tanaka. “The results of this project may also help glass manufacturers design new multi-component systems that have certain desired properties, such as resilience, toughness and electroconductivity.”

This story is adapted from material from the University of Tokyo, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier. Link to original source.

Source: https://www.materialstoday.com/amorphous/news/glass-forming-by-metallic-mixtures-becomes-clearer/

Continue Reading

Material Science

Material Science News | Materials Research

Scintacor: An Overview of Its Products and Capabilities

In this interview, AZoM talks to Ed Bullard and Martin Lewis, CEO and Principal Engineer at Scintacor respectively, about Scintacor, the companies products, capabilities, and vision for the future.

Republished by Plato

Published

on

Scintacor: An Overview of Its Products and Capabilities

In this interview, AZoM talks to Ed Bullard and Martin Lewis, CEO and Principal Engineer at Scintacor respectively, about Scintacor, the companies products, capabilities, and vision for the future.

Source: https://www.azom.com/materials-news-index.aspx

Continue Reading
Heartland1 day ago

CBD Vape Oil Market 2021: Global Trends, Business Overview, Challenges, Opportunities …

Heartland4 days ago

Uncategorized5 days ago

What CBD Oil is Right For Me?

Heartland4 days ago

Heartland3 days ago

Heartland4 days ago

Registration opens for consumable hemp manufacturers and retailers

Heartland4 days ago

CBD Oil for Beginners

Heartland4 days ago

CBP Can't Block Parts Imports, Hemp Machinery Co. Says

Heartland3 days ago

8 of the best cannabis gummies to try right now

Heartland2 days ago

National Hemp Association Awards First Recipients of Social Equity Conscious Business (SECB …

Heartland2 days ago

Industrial Hemp in Automotive Market Estimated Forecast Analysis 2021-2030

Heartland5 days ago

Interactions between CBD and hormonal contraception

Metal5 days ago

Pakistani CRC and HDG producers raise prices on higher input costs

Heartland4 days ago

CBD Skincare Products Are Popping Up Everywhere — But Do They Actually Work?

Heartland4 days ago

Sunnyvale Labs CBD Gummies — Instant Pain Relief Hemp Gummies!

Heartland4 days ago

Heartland3 days ago

Heartland4 days ago

Material4 days ago

IMC microstructure modification and mechanical reinforcement of Sn–Ag–Cu/Cu microelectronic joints through an advanced surface finish technique

Heartland4 days ago

Hemp Is Creating an EcoRevolution

Heartland4 days ago

CBD to combat physcoactive properties in THC

Heartland5 days ago

12 Ways CBD products can Improve your Health and Wellbeing – 2021 Review

Heartland5 days ago

Former Eaze CEO Pleads Guilty In Bank Fraud Case

Material4 days ago

A new approach of predicting dynamic recrystallization using directly a flow stress model and its application to medium Mn steel

Heartland4 days ago

Acreage Holdings to Sell Florida Cannabis Operations to Red White & Bloom for $60 Million

Heartland4 days ago

Uncategorized3 days ago

The Daily Hit: The February 25th, 2021

Material2 days ago

Microstructure, characterization of interfacial phases and mechanical properties of high Nb–TiAl/Al2O3 joints brazed by novel Nb particle-reinforced Ag–Cu filler alloy

Heartland2 days ago

Drew Carey CBD – How Does It Work For Body Pain

Heartland5 days ago

Growing Popularity of Cannabidiol Cbd Market Share by Top Manufacturers ENDOCA, CBD

Trending

A Cloud Nine Capital Entity Copyright © 2020 – All Rights Reserved Proudly Made in America