Navigation Links
UCLA researchers now 1 step closer to controlled engineering of nanocatalysts
Date:4/20/2011

Currently, some 20 percent of the world's industrial production is based on catalysts molecules that can quicken the pace of chemical reactions by factors of billions. Oil, pharmaceuticals, plastics and countless other products are made by catalysts.

Many are hoping to make current catalysts more efficient, resulting in less energy consumption and less pollution. Highly active and selective nanocatalysts, for example, can be used effectively in efforts to break down pollution, create hydrogen fuel cells, store hydrogen and synthesize fine chemicals. The challenge to date has been developing a method for producing nanocatalysts in a controlled, predictable way.

In a move in this direction, Yu Huang, an assistant professor of materials science and engineering at the UCLA Henry Samueli School of Engineering and Applied Science, and her research team have proposed and demonstrated a new approach to producing nanocrystals with predictable shapes by utilizing surfactants, biomolecules that can bind selectively to certain facets of the crystals' exposed surfaces.

Their new study can be found online in the journal Nature Chemistry.

At the nanoscale, the physical and chemical properties of materials depend on the materials' size and shape. The ultimate goal has been to rationally engineer materials to achieve programmable structures and predictable properties, thereby producing the desired functions. Yet shaped nanocrystals are still generally synthesized by trial-and-error, using non-specific molecules as surfactants a result of the inability to find appropriate molecules to control crystal formation.

Huang's team's innovative new work could change that, potentially leading to the ability to rationally produce nanocatalysts with desired shapes and, hence, catalytic properties.

"In our study, we were able to identify specific biomolecules peptide sequences, in our case which can recognize a desired crystal surface and produce nanocrystals exposed with a particular surface to control the shape," said Chin-Yi Chiu, a UCLA Engineering graduate student and lead author of the study.

"Facet-specific biomolecules can be used to direct the growth of nanocrystals, and most importantly, now we can do it in a predictable fashion," said Huang, senior author of the study. "This is still a first step, but we have overcome the challenges by finding the most specific and selective peptide sequences through a rational selection process."

Huang's team accomplished this by using a phage library that generated a pool of peptide sequences. The team was then able to identify the selectivity of peptide sequences on different crystal surfaces. The next step, the researchers say, is to figure out what exactly is happening on the interface and to be able to describe the characterizations of the interface.

"We don't know the molecular details yet that's like the holy grail of molecular biomimetics," Huang said. "Take the catalyst, for example. If we can predict the synthesized catalyst for just one surface, it could have much more improved activity and selectivity. We are still in the initial phase of what we really want to do, which is to see whether or not we can eventually program the synthesis of material structures."

"It's always been a personal interest to learn from the natural evolutionary selection process and apply it to research," Chiu said. "It is especially satisfying to be able to engineer a rational selection process for nanoscale materials to create nanocrystals with desired shapes."


'/>"/>

Contact: Wileen Wong Kromhout
wwkromhout@support.ucla.edu
310-206-0540
University of California - Los Angeles
Source:Eurekalert

Related biology technology :

1. Understanding the science of solar-based energy: more researchers are better than one
2. Researchers decode viral process that prepares cells for HIV infection
3. Dartmouth researchers advance cellulosic ethanol production
4. Researchers develop new model for cystic fibrosis
5. Use it or lose it? Researchers investigate the dispensability of our DNA
6. Sigma-Aldrich and the University of Illinois Offer New Boronic Acid Surrogates to Researchers Worldwide Through Licensing Agreement
7. Researchers write protein nanoarrays using a fountain pen and electric fields
8. Researchers show how to stamp nanodevices with rubber molds
9. The Lancets New Online Medical Journal Helps Clinicians and Medical Researchers Find Practice-Changing Evidence Quickly and Easily
10. Ultrafast lasers give CU-Boulder researchers a snapshot of electrons in action
11. VAP(R) Cholesterol Test Helps Researchers Identify Treatment Effects of Combination Therapy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network for ... Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is to ... are designed, built and brought to market. , The Design Lab is Supplyframe’s ...
(Date:6/23/2016)... Durham, NC (PRWEB) , ... June 23, 2016 , ... ... Odense University Hospital in Denmark detail how a patient who developed lymphedema after being ... (fat) tissue. The results could change the paradigm for dealing with this debilitating, frequent ...
(Date:6/23/2016)... 2016  Blueprint Bio, a company dedicated to identifying, ... community, has closed its Series A funding round, according ... "We have received a commitment from Forentis Fund ... to meet our current goals," stated Matthew Nunez ... to complete validation on the current projects in our ...
(Date:6/23/2016)... , June 23, 2016 On Wednesday, ... at 4,833.32, down 0.22%; the Dow Jones Industrial Average edged ... closed at 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on ... ), Nektar Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals ... (NASDAQ: BIND ). Learn more about these stocks ...
Breaking Biology Technology:
(Date:6/16/2016)... 2016 The global ... reach USD 1.83 billion by 2024, according to ... Technological proliferation and increasing demand in commercial buildings, ... drive the market growth.      (Logo: ... development of advanced multimodal techniques for biometric authentication ...
(Date:6/9/2016)... , June 9, 2016 ... deploy Teleste,s video security solution to ensure the safety of ... during the major tournament Teleste, an ... systems and services, announced today that its video security solution ... to back up public safety across the country. The ...
(Date:6/2/2016)... June 2, 2016 The Department of ... awarded the 44 million US Dollar project, for the ... Plates including Personalization, Enrolment, and IT Infrastructure , ... the production and implementation of Identity Management Solutions. Numerous renowned ... Decatur was selected for the most ...
Breaking Biology News(10 mins):