Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Tiny octopods catalyze bright ideas: Rice-led study shows plasmonic sensors and catalysts need not be mutually exclusive

A scanning electron transmission microscope image shows an octopod, left, created at Rice University that has both plasmonic and catalytic abilities. At right is an illustration of the octopod, which has a gold core and a gold-palladium alloy surface. The scale bar is 50 nanometers.
CREDIT: Ringe Group/Rice University
A scanning electron transmission microscope image shows an octopod, left, created at Rice University that has both plasmonic and catalytic abilities. At right is an illustration of the octopod, which has a gold core and a gold-palladium alloy surface. The scale bar is 50 nanometers.

CREDIT: Ringe Group/Rice University

Abstract:
Nanoscale octopods that do double duty as catalysts and plasmonic sensors are lighting a path toward more efficient industrial processes, according to a Rice University scientist.


BR>Three-dimensional images of an octopod nanoparticle of gold and palladium were captured at Rice University's electron microscopy center and animated. The research proved that plasmonic nanoparticles can support catalysts without losing their beneficial optical properties. Such alloys could make industrial processes more efficient or enable sun-driven chemical reactions.
BR>Credit: Ringe Group/Rice University

Tiny octopods catalyze bright ideas: Rice-led study shows plasmonic sensors and catalysts need not be mutually exclusive

Houston, TX | Posted on November 30th, 2015

Catalysts are substances that speed up chemical reactions and are essential to many industries, including petroleum, food processing and pharmaceuticals. Common catalysts include palladium and platinum, both found in cars' catalytic converters. Plasmons are waves of electrons that oscillate in particles, usually metallic, when excited by light. Plasmonic metals like gold and silver can be used as sensors in biological applications and for chemical detection, among others.

Plasmonic materials are not the best catalysts, and catalysts are typically very poor for plasmonics. But combining them in the right way shows promise for industrial and scientific applications, said Emilie Ringe, a Rice assistant professor of materials science and nanoengineering and of chemistry who led the study that appears in Scientific Reports.

"Plasmonic particles are magnets for light," said Ringe, who worked on the project with colleagues in the U.S., the United Kingdom and Germany. "They couple with light and create big electric fields that can drive chemical processes. By combining these electric fields with a catalytic surface, we could further push chemical reactions. That's why we're studying how palladium and gold can be incorporated together."

The researchers created eight-armed specks of gold and coated them with a gold-palladium alloy. The octopods proved to be efficient catalysts and sensors.

"If you simply mix gold and palladium, you may end up with a bad plasmonic material and a pretty bad catalyst, because palladium does not attract light like gold does," Ringe said. "But our particles have gold cores with palladium at the tips, so they retain their plasmonic properties and the surfaces are catalytic."

Just as important, Ringe said, the team established characterization techniques that will allow scientists to tune application-specific alloys that report on their catalytic activity in real time.

The researchers analyzed octopods with a variety of instruments, including Rice's new Titan Themis microscope, one of the most powerful electron microscopes in the nation. "We confirmed that even though we put palladium on a particle, it's still capable of doing everything that a similar gold shape would do. That's really a big deal," she said.

"If you shine a light on these nanoparticles, it creates strong electric fields. Those fields enhance the catalysis, but they also report on the catalysis and the molecules present at the surface of the particles," Ringe said.

The researchers used electron energy loss spectroscopy, cathodoluminescence and energy dispersive X-ray spectroscopy to make 3-D maps of the electric fields produced by exciting the plasmons. They found that strong fields were produced at the palladium-rich tips, where plasmons were the least likely to be excited.

Ringe expects further research will produce multifunctional nanoparticles in a variety of shapes that can be greatly refined for applications. Her own Rice lab is working on a metal catalyst to turn inert petroleum derivatives into backbone molecules for novel drugs.

###

Co-authors of the paper are Christopher DeSantis and Sara Skrabalak of Indiana University; Sean Collins and Paul Midgley of the University of Cambridge, United Kingdom; and Martial Duchamp and Rafal Dunin-Borkowski of the Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and the Peter Grünberg Institute, Jülich, Germany.

The research was supported by the European Union under the Seventh Framework Program, the European Research Council, the Royal Society, Trinity Hall Cambridge, a University of Cambridge Gates Fellowship and the National Science Foundation.

####

About Rice University
Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation's top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,910 undergraduates and 2,809 graduate students, Rice's undergraduate student-to-faculty ratio is 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice is ranked No. 1 for best quality of life and for lots of race/class interaction by the Princeton Review. Rice is also rated as a best value among private universities by Kiplinger's Personal Finance.

Follow Rice News and Media Relations via Twitter @RiceUNews

For more information, please click here

Contacts:
David Ruth

713-348-6327

Mike Williams
713-348-6728

Copyright © Rice University

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

Read the paper at:

Emilie Ringe Group:

Rice Department of Material Science and NanoEngineering:

Related News Press

News and information

Arrowhead Pharmaceuticals Hosts R&D Day on Emerging Pipeline of RNAi Therapeutics October 18th, 2019

How perovskite in solar cells recrystallizes and why modified carbon nanotubes can help overcome the reproducibility problem by making use of this October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Highest-throughput 3D printer is future of manufacturing: Rapid manufacturing on-demand could put warehouses, molds into the past October 17th, 2019

Nanoparticles may have bigger impact on the environment than previously thought: Non-antibacterial nanoparticles can cause resistance in bacteria October 17th, 2019

Imaging

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Physics: DNA-PAINT super-resolution microscopy at speed: Optimized DNA sequences allow for 10-times faster image acquisition in DNA-PAINT October 11th, 2019

Tiny, biocompatible laser could function inside living tissues: Nanolaser has potential to treat neurological disorders or sense disease biomarkers September 23rd, 2019

SMART announces a revolutionary tech to study cell nanomechanics: New research discovery enables scientists to study membrane mechanics of cell's nucleus, revolutionising the understanding of metastatic cancers as well as opening the doors for identification of stem cells for the September 20th, 2019

Chemistry

Do you Kyoto? World-leading companies share their approaches to environmentally friendly business at NAUM’19 October 14th, 2019

Physics: An ultrafast glimpse of the photochemistry of the atmosphere October 11th, 2019

Water + air + electricity = hydrogen peroxide: Rice University breakthrough produces valuable chemical on demand at point of use October 10th, 2019

The future of materials with graphene nanotubes starts in Japan September 19th, 2019

Videos/Movies

Water + air + electricity = hydrogen peroxide: Rice University breakthrough produces valuable chemical on demand at point of use October 10th, 2019

Govt.-Legislation/Regulation/Funding/Policy

Matching Investment Program (MIP) Leverages $140K Empire State Development/NYSTAR Funding to SUNY Poly’s CATN2 to Enable $1.5M in Matching Commitments from Industry Partners: Investment Funds Faculty Research Related to Advanced Materials, Genomics, and Semiconductor Reliability October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Highest-throughput 3D printer is future of manufacturing: Rapid manufacturing on-demand could put warehouses, molds into the past October 17th, 2019

Nanoparticles may have bigger impact on the environment than previously thought: Non-antibacterial nanoparticles can cause resistance in bacteria October 17th, 2019

Nanomedicine

Matching Investment Program (MIP) Leverages $140K Empire State Development/NYSTAR Funding to SUNY Poly’s CATN2 to Enable $1.5M in Matching Commitments from Industry Partners: Investment Funds Faculty Research Related to Advanced Materials, Genomics, and Semiconductor Reliability October 18th, 2019

Arrowhead Pharmaceuticals Hosts R&D Day on Emerging Pipeline of RNAi Therapeutics October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

SUNY Poly Receives $75,000 National Science Foundation Award for Development of Bioengineered and Improved Blood Thinner: Grant is Part of Collaboration with TEGA Therapeutics, Inc. Supporting Research Leading to Engineered Cells and Production of a Scalable Heparin Product October 8th, 2019

Sensors

Nanoscale manipulation of light leads to exciting new advancement: UNM researchers find decreasing the density of nanoparticles in ordered arrays produces exceptional field enhancements October 11th, 2019

Product authentication at your fingertips: UC Riverside-led research brings rapid and reversible switching of plasmonic color to solids October 4th, 2019

Researchers repurpose failed cancer drug into printable semiconductor October 3rd, 2019

MEMS & Sensors Executive Congress Technology Showcase Finalists Highlight Innovations in Automotive, Biomedical and Consumer Electronics: MSIG MEMS & Sensors Executive Congress – October 22-24, 2019, Coronado, Calif. October 1st, 2019

Discoveries

How perovskite in solar cells recrystallizes and why modified carbon nanotubes can help overcome the reproducibility problem by making use of this October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Highest-throughput 3D printer is future of manufacturing: Rapid manufacturing on-demand could put warehouses, molds into the past October 17th, 2019

Nanoparticles may have bigger impact on the environment than previously thought: Non-antibacterial nanoparticles can cause resistance in bacteria October 17th, 2019

Materials/Metamaterials

Physicists found weak spots in ceramic/graphene composites: Physicists found out the structures in nanomaterials made of ceramic and graphene plates, in which cracks appear most frequently September 27th, 2019

Turning heat into electricity: A new thermoelectric material developed at FEFU: Young scientists from FEFU manufactured new thermoelectric material based on strontium titanate and titanium oxide September 27th, 2019

The future of materials with graphene nanotubes starts in Japan September 19th, 2019

A Quantum Leap: $25M grant makes UC Santa Barbara home to the nation’s first NSF-funded Quantum Foundry, a center for development of materials for quantum information-based technologies September 16th, 2019

Announcements

Matching Investment Program (MIP) Leverages $140K Empire State Development/NYSTAR Funding to SUNY Poly’s CATN2 to Enable $1.5M in Matching Commitments from Industry Partners: Investment Funds Faculty Research Related to Advanced Materials, Genomics, and Semiconductor Reliability October 18th, 2019

Arrowhead Pharmaceuticals Hosts R&D Day on Emerging Pipeline of RNAi Therapeutics October 18th, 2019

How perovskite in solar cells recrystallizes and why modified carbon nanotubes can help overcome the reproducibility problem by making use of this October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

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

How perovskite in solar cells recrystallizes and why modified carbon nanotubes can help overcome the reproducibility problem by making use of this October 18th, 2019

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Nanoparticles may have bigger impact on the environment than previously thought: Non-antibacterial nanoparticles can cause resistance in bacteria October 17th, 2019

Physics: DNA-PAINT super-resolution microscopy at speed: Optimized DNA sequences allow for 10-times faster image acquisition in DNA-PAINT October 11th, 2019

Tools

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

Combination of Nanometrics and Rudolph Technologies to Create Onto Innovation October 16th, 2019

Physics: DNA-PAINT super-resolution microscopy at speed: Optimized DNA sequences allow for 10-times faster image acquisition in DNA-PAINT October 11th, 2019

Oxford Instruments Supplies HLJ Technology Co. Ltd., with Plasma Etch and Deposition Solutions for the fabrication of VCSELS on 6 inch wafers October 3rd, 2019

Grants/Sponsored Research/Awards/Scholarships/Gifts/Contests/Honors/Records

Matching Investment Program (MIP) Leverages $140K Empire State Development/NYSTAR Funding to SUNY Poly’s CATN2 to Enable $1.5M in Matching Commitments from Industry Partners: Investment Funds Faculty Research Related to Advanced Materials, Genomics, and Semiconductor Reliability October 18th, 2019

Highest-throughput 3D printer is future of manufacturing: Rapid manufacturing on-demand could put warehouses, molds into the past October 17th, 2019

Water + air + electricity = hydrogen peroxide: Rice University breakthrough produces valuable chemical on demand at point of use October 10th, 2019

Novel nanogels hold promise for improved drug delivery to cancer patients: 'Precision Medicine' approach underpins UT Austin engineers' development of multifunctional nanogel September 27th, 2019

Research partnerships

Novel nanoprobes show promise for optical monitoring of neural activity: New approach for studying neural circuits offers advantages over both microelectrodes and fluorescence-based optical techniques that require genetic modifications October 18th, 2019

PROPHESEE Joins IRT Nanoelec 3D Integration Program Will Work with CEA-Leti, STMicroelectronics, Mentor, EVG, and SET to Develop New 3D Event-Based Vision System October 14th, 2019

Borophene on silver grows freely into an atomic ‘skin’: Rice scientists lead effort to improve manufacture of valuable 2D material October 1st, 2019

Machine learning at the quantum lab September 27th, 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