Home > Press > VCU researchers develop new method for synthesis of nanomaterials
Researchers share findings at American Chemical Society National Meeting
VCU researchers develop new method for synthesis of nanomaterials
Richmond, VA | Posted on March 30, 2006
Virginia Commonwealth University chemists, using a simple, commercial microwave oven, have developed a new method for the synthesis of nanomaterials that can control the dimensions and properties of rods and wires that are just one billionth of a meter in size.
The method, known as microwave irradiation, or MWI, is considered a fast and easy way to create highly versatile, tailored nanorods and nanowires to be used in medical applications, drug delivery, sensors, communications and optical devices because microwave heating can provide significant enhancement in reaction rates.
M. Samy El-Shall, Ph.D., professor of chemistry and affiliate professor of chemical engineering at VCU, is discussing his ongoing work of the design, synthesis and characterization of nanoparticles at the American Chemical Society National Meeting & Exposition in Atlanta, March 26-30. In addition, his colleague, Asit Baran Panda, a post-doctoral fellow in the VCU Department of Chemistry, will present this study.
“The synthesis of new materials made of particles, rods and wires with dimensions in the nanometer scale is among the most active areas of research in science due to the unique properties of these materials compared to conventional materials made from micron sized particles,” said El-Shall, who is lead author of the study.
“MWI is unique in providing scaled-up processes thus leading to a potentially important industrial advancement in the large-scale synthesis of nanomaterials,” said El-Shall.
Most methods currently used to synthesize nanomaterials are complicated, require specific equipment and produce small amounts of nanomaterials,” he said.
Although MWI process involves the use of a conventional microwave, it requires a defined recipe of chemicals and solvents to create the nanomaterials in the laboratory setting.
The advantage of using a microwave is that the energy goes directly through molecules compared to thermal heat which just applies heat to everything. In addition, El-Shall said that the nanorods and nanowires made by this method self-assemble into uniform aligned arrays of rods with well-controlled spacing between the rods. This is critical to be able to measure their individual conductivity and fluorescence, he said.
“The key issue here is the control of the size, shape and lateral dimensions of nanostructures because these nanoparticles in the form of rods, wires, belts, cubes, etc., are the building blocks used in devices and processes such as light-emitting diodes, solar cells, single electron transistors, lasers and biological labels,” he said.
Furthermore, El-Shall and his research team found that nanorods that are 1nm wide and 5-6nm long could be synthesized in just 30-60 seconds; while longer nanowires, 1.5nm wide and 350nm long, could be synthesized in two minutes. Traditional methods take many more hours to synthesize such materials.
El-Shall and his team are currently examining how to apply this basic principal to a broader scale to synthesize nanowires with multiple functions such as fluorescence, conductivity and magnetism.
These findings were reported in the March issue of the Journal of the American Chemical Society.
This work was supported by a grant from the National Science Foundation.
El-Shall collaborated with Asit Baran Panda and Garry Glaspell, both post-doctoral fellows in El-Shall’s group in the VCU Department of Chemistry.
About VCU and the VCU Medical Center:
Located on two downtown campuses in Richmond, Va., Virginia Commonwealth University is ranked nationally by the Carnegie Foundation as a top research institution and enrolls more than 29,000 students in more than 181 certificate, undergraduate, graduate, professional and doctoral programs in the arts, sciences and humanities in 15 schools and one college. Forty of the university’s programs are unique in Virginia, and 20 graduate and professional programs have been ranked by U.S. News & World Report as among the best of their kind. MCV Hospitals, clinics and the health sciences schools of Virginia Commonwealth University compose the VCU Medical Center, one of the leading academic medical centers in the country.
For more information, please click here.
University News Services
Copyright © Virginia Commonwealth University
If you have a comment, please Contact
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Beautiful "flowers" self-assemble in a beaker: Elaborate nanostructures blossom from a chemical reaction perfected at Harvard May 17th, 2013
DNA-Guided Assembly Yields Novel Ribbon-Like Nanostructures: Approach could be useful in fabricating new kinds of materials with engineered properties May 16th, 2013
Production of Sensitive Hydrogen Peroxide Biosensor Using Silver Nanoparticles April 26th, 2013
Scientists see nanoparticles form larger structures in real time April 22nd, 2013
Advancements and developments of solid-state nanopores sensors May 16th, 2013
Physicists discover a new kind of friction: Friction in the nano-world May 16th, 2013
Squishy hydrogels may be the ticket for studying biological effects of nanoparticles May 15th, 2013
Pitt Chemists Demonstrate Nanoscale Alloys So Bright They Could Have Potential Medical Applications: “Think about a particle that will not only help researchers detect cancer sooner but be used to treat the tumor, too.” May 15th, 2013
Artificial Forest for Solar Water-Splitting: Berkeley Lab Researchers Report First Fully Integrated Artificial Photosynthesis Nanosystem May 17th, 2013
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013
NIA Public Briefing: Nanotechnology and the Council of Europe May 17th, 2013
Scientists capture first direct proof of Hofstadter butterfly effect May 17th, 2013
Imec and Renesas collaborate on ultra-low power short range radios: Collaboration will develop robust wireless solutions for future electronics May 16th, 2013
HELIOS Program Develops Complete Supply Chain for Integrating Photonics with CMOS Circuit via IC Fabrication Processes May 14th, 2013
Peratech designs the QTC Ultra Sensor - an ultra-sensitive touch sensor for domestic, commercial and industrial use: Pressure sensor so sensitive that it can be operated through glass or steel sheet May 13th, 2013
Industrial Nanotech Announces 3300 Gallon Nansulate(R) Crystal Order - First of Five Orders Expected to Total Over 15,000 Gallons May 13th, 2013