Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > UH researchers find definitive evidence of how zeolites grow: A breakthrough technique allowed them to track crystal growth in real time

This is a photograph of the high temperature liquid cell attached to the atomic force microscope (MFP-3D-SA, Asylum Research, Santa Barbara, CA). The cell is equipped with inlet/outlet ports for liquid injection and a heating element that regulates temperatures as high as 300 C.

Credit: University of Houston
This is a photograph of the high temperature liquid cell attached to the atomic force microscope (MFP-3D-SA, Asylum Research, Santa Barbara, CA). The cell is equipped with inlet/outlet ports for liquid injection and a heating element that regulates temperatures as high as 300 C.

Credit: University of Houston

Abstract:
Researchers have found the first definitive evidence of how silicalite-1 (MFI type) zeolites grow, showing that growth is a concerted process involving both the attachment of nanoparticles and the addition of molecules.

UH researchers find definitive evidence of how zeolites grow: A breakthrough technique allowed them to track crystal growth in real time

Houston, TX | Posted on May 15th, 2014

Both processes appear to happen simultaneously, said Jeffrey Rimer, an engineering professor at the University of Houston and lead author of a paper published Thursday in the journal Science.

He said a second component to the research could have even more lasting impact. He and researcher Alexandra I. Lupulescu used a new technique allowing them to view zeolite surface growth in real time, a breakthrough Rimer said can be applied to other types of materials, as well.

Typically, researchers examine zeolite growth by removing crystals from the natural synthesis environment and analyzing changes in their physical properties, said Rimer, Ernest J. and Barbara M. Henley Assistant Professor of Chemical and Biomolecular Engineering at UH. That has made understanding the fundamental mechanism of zeolite growth more challenging.

Zeolites occur naturally but can also be manufactured. This research involved silicalite-1, a synthetic, aluminum-free zeolite that has served as a prototype in literature for studying zeolite growth.

For more than two decades, researchers have theorized that nanoparticles, which are known to be present in zeolite growth solutions, played a role in the growth, but there was no direct evidence. And while most crystals grow through classical means - the addition of atoms or molecules to the crystal - the presence and gradual consumption of nanoparticles suggested a nonclassical pathway for zeolite crystallization.

Rimer and Lupulescu found that both classical and nonclassical growth models were at work.

"We have shown that a complex set of dynamics takes place," Rimer said. "In doing so, we have revealed that there are multiple pathways in the growth mechanism, which solves a problem that has been debated for nearly 25 years."

It solves a mystery in the world of crystal engineering, but how they did it may have a more lasting impact. Rimer and Lupulescu, who did the project as part of her dissertation, earning her Ph.D. in chemical engineering from UH's Cullen College of Engineering in December, worked with California-based Asylum Research. They used time-resolved Atomic Force Microscopy (AFM) to record topographical images of silicalite-1 surfaces as they grew.

AFM provides near molecular-resolution 3-D images of the crystal surface. Rimer said the technology, along with software developed by Asylum Research and his lab, made it possible to study the growth in situ, or in place. While his lab works at temperatures up to 100 degrees Celsius, the instrumentation can handle temperatures as high as 300 C, making it possible to use it for a number of materials that grow in solvothermal conditions, he said.

####

For more information, please click here

Contacts:
Jeannie Kever

713-743-0778

Copyright © University of Houston

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

New drug-delivery approach holds potential for treating obesity May 2nd, 2016

Spintronics for future information technologies: Spin currents in topological insulators controlled May 2nd, 2016

Imaging

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

The Translational Research Center at the University Hospital of Erlangen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles such as exosomes April 28th, 2016

Discoveries

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Non-animal approach to predict impact of nanomaterials on human lung published Archives of Toxicology publishes workshop recommendations May 2nd, 2016

Materials/Metamaterials

Clay nanotube-biopolymer composite scaffolds for tissue engineering May 1st, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Hybrid nanoantennas -- next-generation platform for ultradense data recording April 28th, 2016

Atomic magnets using hydrogen and graphene April 27th, 2016

Announcements

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

New drug-delivery approach holds potential for treating obesity May 2nd, 2016

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

New drug-delivery approach holds potential for treating obesity May 2nd, 2016

Tools

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Exploring phosphorene, a promising new material April 29th, 2016

JPK reports on the use of a NanoWizard AFM system at the University of Kaiserslautern to study the interaction of bacteria with microstructured surfaces April 28th, 2016

Chemists use DNA to build the world's tiniest thermometer April 27th, 2016

Research partnerships

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Cooling graphene-based film close to pilot-scale production April 30th, 2016

Personal cooling units on the horizon April 29th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic