Engineers Use Gold Nanobeads to Remove Pollutants From Wastewater

Monday, August 27, 2018 - 15:33

Engineers at the University of California, Riverside, have altered a virus to arrange gold atoms into spheroids measuring a few nanometers in diameter. The finding could make production of some electronic components cheaper, easier, and faster, phys.org reports.

"Nature has been assembling complex, highly organized nanostructures for millennia with precision and specificity far superior to the most advanced technological approaches," said Elaine Haberer, a professor of electrical and computer engineering in UCR's Marlan and Rosemary Bourns College of Engineering and senior author of the paper describing the breakthrough. "By understanding and harnessing these capabilities, this extraordinary nanoscale precision can be used to tailor and build highly advanced materials with previously unattainable performance."

Viruses exist in a multitude of shapes and contain a wide range of receptors that bind to molecules. Genetically modifying the receptors to bind to ions of metals used in electronics causes these ions to "stick" to the virus, creating an object of the same size and shape. This procedure has been used to produce nanostructures used in battery electrodes, supercapacitors, sensors, biomedical tools, photocatalytic materials, and photovoltaics.

The M13 bacteriophage, however, is more flexible. Bacteriophages are a type of virus that infects bacteria, in this case, gram-negative bacteria, such as Escherichia coli, which is ubiquitous in the digestive tracts of humans and animals. M13 bacteriophages genetically modified to bind with gold are usually used to form long, golden nanowires.

Studies of the infection process of the M13 bacteriophage have shown the virus can be converted to a spheroid upon interaction with water and chloroform. Yet, until now, the M13 spheroid has been completely unexplored as a nanomaterial template.

"The novelty of our work lies in the optimization and demonstration of a viral template, which overcomes the geometric constraints associated with most other viruses," Haberer said. "We used a simple conversion process to make the M13 virus synthesize inorganic spherical nanoshells tens of nanometers in diameter, as well as nanowires nearly 1 micron in length."

The researchers are using the gold nanobeads to remove pollutants from wastewater through enhanced photocatalytic behavior.

The work enhances the utility of the M13 bacteriophage as a scaffold for nanomaterial synthesis. The researchers believe the M13 bacteriophage template transformation scheme described in the paper can be extended to related bacteriophages.

The paper, "M13 bacteriophage spheroids as scaffolds for directed synthesis of spiky gold nanostructures," was published in the July 21 issue of Nanoscale.

Related News

Kerman Researchers Produce “Nanocatalist” From Carthamus Tinctorius

1397/6/31 12:38

Aliabad-e Katul IAU Researchers Develop a New Method to Produce Silver Nanowires

1397/6/20 10:38

Researchers Develop a Component of Green Tea Delivering Drugs to Tumors

1397/5/30 09:21

Developing Knowledge-Based Companies Will Tackle Sanctions

1397/5/27 14:44

Nanoparticle Vaccine Could be Effective Against Influenza Virus, Study Shows

1397/5/13 11:17

Najafabad IAU Researchers Produce Nanocomposite to Eradicate Cancerous Bone Cells

1397/5/7 12:33

Iranian Researchers Increase Efficiency of Solar Absorption Systems Using Nanofluid

1397/5/3 13:12

Iranian Researchers Develop Novel Bio-Nano Emulsion Fuel Based on Biodegradable Nanoparticles to Reduce Exhaust Emissions

1397/4/30 14:20

CNBP Scientists Developed a New Targeted Treatment for Cancer

1397/4/26 12:50

Khomeyni Shahr IAU Researchers Produce 3D Printed Nanostructured Scaffolds

1397/4/19 11:38

S & R IAU Researcher Makes Nano Antibiotics Using Biological Combination of Active Cyanobacteria

1397/4/16 09:51

Iranian Researchers Produce Nanocapsules Containing Antioxidants From Common Kilka

1397/4/11 16:05

Iranian Researchers Make Paper From Soda Bagasse Pulp

1397/4/6 13:47

Researchers Make Smallest Nanoparticle Stabilized Nanoemulsions with New Technique

1397/4/4 16:19

Iranian Researchers Prevent Heavy Metals Release Into Groundwater Aquifer

1397/4/2 14:31

Researchers Camouflage a Cancer-Killing Drug Using Cells From the Tumor Itself

1397/3/30 13:39

Diamond May Responsible for a Mysterious Glow in the Milky Way

1397/3/23 09:11

Researchers Develop Cell-like Nanorobots Clear Bacteria and Toxins From Blood

1397/3/13 15:06

MIT Physicists Develop AI-based Method Could Speed Development of Specialized Nanoparticles

1397/3/12 13:49

Nano Match Plan to Support Iranian Nano Products

1397/3/6 13:22

Yazd IAU Holds 1st National Conference on Nanobiotechnology

1397/2/23 08:24

Ravansar IAU Faculty Creates Modified Bitumen Using Nano Graphene Oxide

1397/2/15 14:55

Opinions


Popular News

Latest News