Navigation Links
New technique controls dimensions of gold nanorods while manufacturing on a large scale

North Carolina State University researchers have a developed a technique for efficiently producing nanoscale gold rods in large quantities while simultaneously controlling the dimensions of the nanorods and their optical properties. The optical properties of gold nanorods make them desirable for use in biomedical applications ranging from imaging technologies to cancer treatment.

"This technique should facilitate the economical manufacture of large volumes of gold nanorods," says Dr. Joseph Tracy, an associate professor of materials science and engineering at NC State and senior author of a paper on the work. "And that should be good news for both the science community and the biomedical research and development community."

The NC State team started with an existing technique, in which gold nanorods are formed by mixing two chemical solutions together. However, that technique only converts 30 percent of the gold into nanorods the rest remains dissolved in solution.

To convert the remaining 70 percent of the gold into nanorods, the researchers added a continuous stream of ascorbic acid (better known as vitamin C) to the solution, while constantly stirring the mixture. The ascorbic acid essentially pulls the gold out of the solution and deposits it on the existing nanorods.

But the researchers also found that the slower they added the ascorbic acid, the stubbier the nanorods became. This is important because the optical properties of gold nanorods depend on their "aspect ratio" their relative height and width. For example, long, thin gold nanorods absorb light at wavelengths greater than 800 nanometers (in the near infrared spectrum), while shorter, wider gold nanorods absorb light at wavelengths below 700 nanometers (red or dark red).

"The ability to fine-tune these optical properties will likely be useful for the development of new biomedical applications," Tracy says.


Contact: Matt Shipman
North Carolina State University

Page: 1

Related biology news :

1. New synthetic biology technique boosts microbial production of diesel fuel
2. New genetic bar code technique establishes ability to derive DNA information from RNA
3. Early detection techniques offer hope for improved outcomes in lung cancer patients
4. Scientists develop new technique that could improve heart attack prediction
5. New rearing system may aid sterile insect technique against mosquitoes
6. Its a trap! New laboratory technique captures microRNA targets
7. New screening technique yields elusive compounds to block immune-regulating enzyme
8. New stem cell technique promises abundance of key heart cells
9. Evaluation of microscopy techniques may help scientists to better understand ancient plants
10. New technique allows simulation of noncrystalline materials
11. Transgenic technique to eliminate a specific neural circuit of the brain in primates
Post Your Comments:
Related Image:
New technique controls dimensions of gold nanorods while manufacturing on a large scale
(Date:5/16/2016)...   EyeLock LLC , a market leader of ... an IoT Center of Excellence in Austin, ... of embedded iris biometric applications. EyeLock,s iris ... security with unmatched biometric accuracy, making it the most ... EyeLock,s platform uses video technology to deliver a fast ...
(Date:4/28/2016)... and BANGALORE, India , April ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... today announced a global partnership that will provide ... to use mobile banking and payment services.      ... a key innovation area for financial services, but it also ...
(Date:4/19/2016)... , UAE, April 20, 2016 ... be implemented as a compact web-based "all-in-one" system solution ... the biometric fingerprint reader or the door interface with ... of modern access control systems. The minimal dimensions of ... ID readers into the building installations offer considerable freedom ...
Breaking Biology News(10 mins):
(Date:6/27/2016)...   Ginkgo Bioworks , a leading organism ... today awarded as one of the World Economic ... most innovative companies. Ginkgo Bioworks is engineering biology ... world in the nutrition, health and consumer goods ... customers including Fortune 500 companies to design microbes ...
(Date:6/24/2016)... DIEGO , June 24, 2016 ... more sensitively detects cancers susceptible to PARP inhibitors ... circulating tumor cells (CTCs). The new test has ... HRD-targeted therapeutics in multiple cancer types. ... targeting DNA damage response pathways, including PARP, ATM, ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle Marche in ... peritoneal or pleural mesothelioma. Their findings are the subject of a new article on ... biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma patients that ...
(Date:6/23/2016)... ... June 23, 2016 , ... UAS LifeSciences, one of ... their brand, UP4™ Probiotics, into Target stores nationwide. The company, which has been ... Target to its list of well-respected retailers. This list includes such fine stores ...
Breaking Biology Technology: