Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University

Xiao Cheng Zeng, chemistry professor at the University of Nebraska-Lincoln, is shown with a model of a gold nano-cluster.
CREDIT: Craig Chandler/University Communications/University of Nebraska-Lincoln
Xiao Cheng Zeng, chemistry professor at the University of Nebraska-Lincoln, is shown with a model of a gold nano-cluster.

CREDIT: Craig Chandler/University Communications/University of Nebraska-Lincoln

Abstract:
Arranging gold, atomic staples and electron volts, chemists have drafted new nanoscale blueprints for low-energy structure capable of housing pharmaceuticals and oxygen atoms.

Chemists strike nano-gold: 4 new atomic structures for gold nanoparticle clusters: Research builds upon work by Nobel Prize-winning team from Stanford University

Lincoln, NE | Posted on April 28th, 2015

Led by University of Nebraska-Lincoln chemistry professor Xiao Cheng Zeng, and former UNL visiting professor Yi Gao, new research has revealed four atomic arrangements of a gold nanoparticle cluster. The arrangements exhibit much lower potential energy and greater stability than a standard-setting configuration reported last year by a Nobel Prize-winning team from Stanford University.

The modeling of these arrangements could inform the cluster's use as a transporter of pharmaceutical drugs and as a catalyst for removing pollutants from vehicular emissions or other industrial byproducts, Zeng said.

Zeng and his colleagues unveiled the arrangements for a molecule featuring 68 gold atoms and 32 pairs of bonded sulfur-hydrogen atoms. Sixteen of the gold atoms form the molecule's core; the remainder bond with the sulfur and hydrogen to form a protective coating that stems from the core.

Differences in atomic arrangements can alter molecular energy and stability, with less potential energy making for a more stable molecule. The team calculates that one of the arrangements may represent the most stable possible structure in a molecule with its composition.

"Our group has helped lead the front on nano-gold research over the past 10 years," said Zeng, an Ameritas University Professor of chemistry. "We've now found new coating structures of much lower energy, meaning they are closer to the reality than (previous) analyses. So the deciphering of this coating structure is major progress."

The researchers reported their findings in the April 24 edition of Science Advances, an online journal from the American Association for the Advancement of Science.

The structure of the molecule's gold core was previously detailed by the Stanford team. Building on this, Zeng and his colleagues used a computational framework dubbed "divide-and-protect" to configure potential arrangements of the remaining gold atoms and sulfur-hydrogen pairs surrounding the core.

The researchers already knew that the atomic coating features staple-shaped linkages of various lengths. They also knew the potential atomic composition of each short, medium and long staple -- such as the fact that a short staple consists of two sulfur atoms bonded with one gold.

By combining this information with their knowledge of how many atoms reside outside the core, the team reduced the number of potential arrangements from millions to mere hundreds.

"We divided 32 into the short, middle and long (permutations)," said Zeng, who helped develop the divide-and-protect approach in 2008. "We lined up all those possible arrangements, and then we computed their energies to find the most stable ones.

"Without those rules, it's like finding a needle in the Platte River. With them, it's like finding a needle in the fountain outside the Nebraska Union. It's still hard, but it's much more manageable. You have a much narrower range."

The researchers resorted to the computational approach because of the difficulty of capturing the structure via X-ray crystallography or single-particle transmission electron microscopy, two of the most common imaging methods at the atomic scale.

Knowing the nanoparticle's most stable configurations, Zeng said, could allow biomedical engineers to identify appropriate binding sites for drugs used to treat cancer and other diseases. The findings could also optimize the use of gold nanoparticles in catalyzing the oxidation process that transforms dangerous carbon monoxide emissions into the less noxious carbon dioxide, he said.

###

Zeng and Gao co-authored the study with Wen Wu Xu, who works with Gao at the Shanghai Institute of Applied Physics. The team, which received support from the U.S. Army Research Laboratory and UNL's Nebraska Center for Energy Sciences Research, performed most of its computational analyses through the Holland Computing Center.

####

For more information, please click here

Contacts:
Xiao Cheng Zeng

402-472-9894

Copyright © University of Nebraska-Lincoln

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 Links

Download article:

Related News Press

Laboratories

Research Reveals Exotic Quantum States in Double-Layer Graphene: Findings shed new light on the nature of electron interactions in quantum systems and establish a potential new platform for future quantum computers June 26th, 2019

News and information

Research Reveals Exotic Quantum States in Double-Layer Graphene: Findings shed new light on the nature of electron interactions in quantum systems and establish a potential new platform for future quantum computers June 26th, 2019

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Nanometrics and Rudolph Announce Merger Agreement to Create a Premier Semiconductor Process Control Company June 24th, 2019

Arrowhead Pharmaceuticals Reports Inducement Grants under NASDAQ Marketplace Rule 5635(c)(4) June 22nd, 2019

Chemistry

Neutrons unlock the secrets of limoncello May 21st, 2019

Army discovery opens path to safer batteries May 10th, 2019

Coal could yield treatment for traumatic injuries: Rice, Texas A&M, UTHealth scientists discover coal-derived ‘dots’ are effective antioxidant April 25th, 2019

Multistep self-assembly opens door to new reconfigurable materials April 19th, 2019

Govt.-Legislation/Regulation/Funding/Policy

Research Reveals Exotic Quantum States in Double-Layer Graphene: Findings shed new light on the nature of electron interactions in quantum systems and establish a potential new platform for future quantum computers June 26th, 2019

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Next-gen solar cells spin in new direction: Phosphorene shows efficiency promise June 21st, 2019

Ice lithography: opportunities and challenges in 3D nanofabrication June 21st, 2019

Nanomedicine

Nanometrics and Rudolph Announce Merger Agreement to Create a Premier Semiconductor Process Control Company June 24th, 2019

Arrowhead Pharmaceuticals Reports Inducement Grants under NASDAQ Marketplace Rule 5635(c)(4) June 22nd, 2019

'Nanoemulsion' gels offer new way to deliver drugs through the skin: Novel materials made with FDA-approved components could deliver large payloads of active ingredients June 21st, 2019

Millions with neurological diseases could find new option in implantable neurostimulation devices June 21st, 2019

Discoveries

Research Reveals Exotic Quantum States in Double-Layer Graphene: Findings shed new light on the nature of electron interactions in quantum systems and establish a potential new platform for future quantum computers June 26th, 2019

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Ice lithography: opportunities and challenges in 3D nanofabrication June 21st, 2019

Researchers report new understanding of thermoelectric materials: Discovery leads to promising new materials for converting waste heat to power June 21st, 2019

Announcements

Research Reveals Exotic Quantum States in Double-Layer Graphene: Findings shed new light on the nature of electron interactions in quantum systems and establish a potential new platform for future quantum computers June 26th, 2019

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Nanometrics and Rudolph Announce Merger Agreement to Create a Premier Semiconductor Process Control Company June 24th, 2019

Arrowhead Pharmaceuticals Reports Inducement Grants under NASDAQ Marketplace Rule 5635(c)(4) June 22nd, 2019

Military

'Hot spots' increase efficiency of solar desalination: Rice University engineers boost output of solar desalination system by 50% June 19th, 2019

Mysterious Majorana quasiparticle is now closer to being controlled for quantum computing: Princeton researchers detect a robust Majorana quasiparticle and show how it can be turned on and off June 14th, 2019

Dashing the dream of ideal 'invisibility' cloaks for stress waves June 7th, 2019

Flexible generators turn movement into energy: Rice University's laser-induced graphene nanogenerators could power future wearables June 2nd, 2019

Environment

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Better microring sensors for optical applications May 10th, 2019

Transforming waste heat into clean energy: Researchers use supercomputers to explore new materials for thermoelectric generation May 2nd, 2019

Automotive/Transportation

Good vibrations: Using piezoelectricity to ensure hydrogen sensor sensitivity May 24th, 2019

New Argonne coating could have big implications for lithium batteries May 14th, 2019

Transforming waste heat into clean energy: Researchers use supercomputers to explore new materials for thermoelectric generation May 2nd, 2019

Magnetoresistive sensors for near future innovative development March 22nd, 2019

Industrial

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Building next gen smart materials with the power of sound May 28th, 2019

New surface treatment could improve refrigeration efficiency: A slippery surface for liquids with very low surface tension promotes droplet formation, facilitating heat transfer May 17th, 2019

Better microring sensors for optical applications May 10th, 2019

Research partnerships

Researchers unveil how soft materials react to deformation at molecular level June 24th, 2019

Researchers report new understanding of thermoelectric materials: Discovery leads to promising new materials for converting waste heat to power June 21st, 2019

2D crystals conforming to 3D curves create strain for engineering quantum devices June 7th, 2019

Shaking hands with human or robot? Nanotubes make them alike as never before June 6th, 2019

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project