Navigation Links
UCLA researchers' smartphone 'microscope' can detect a single virus, nanoparticles
Date:9/17/2013

Your smartphone now can see what the naked eye cannot: A single virus and bits of material less than one-thousandth of the width of a human hair.

Aydogan Ozcan, a professor of electrical engineering and bioengineering at the UCLA Henry Samueli School of Engineering and Applied Science, and his team have created a portable smartphone attachment that can be used to perform sophisticated field testing to detect viruses and bacteria without the need for bulky and expensive microscopes and lab equipment. The device weighs less than half a pound.

"This cellphone-based imaging platform could be used for specific and sensitive detection of sub-wavelength objects, including bacteria and viruses and therefore could enable the practice of nanotechnology and biomedical testing in field settings and even in remote and resource-limited environments," Ozcan said. "These results also constitute the first time that single nanoparticles and viruses have been detected using a cellphone-based, field-portable imaging system."

The new research, published on Sept. 9 in the American Chemical Society's journal ACS Nano, comes on the heels of Ozcan's other recent inventions, including a cellphone cameraenabled sensor for allergens in food products and a smart phone attachment that can conduct common kidney tests.

Capturing clear images of objects as tiny as a single virus or a nanoparticle is difficult because the optical signal strength and contrast are very low for objects that are smaller than the wavelength of light.

In the ACS Nano paper, Ozcan details a fluorescent microscope device fabricated by a 3-D printer that contains a color filter, an external lens and a laser diode. The diode illuminates fluid or solid samples at a steep angle of roughly 75 degrees. This oblique illumination avoids detection of scattered light that would otherwise interfere with the intended fluorescent image.

Using this device, which attaches directly to the camera module on a smartphone, Ozcan's team was able to detect single human cytomegalovirus (HCMV) particles. HCMV is a common virus that can cause birth defects such as deafness and brain damage and can hasten the death of adults who have received organ implants, who are infected with the HIV virus or whose immune systems otherwise have been weakened. A single HCMV particle measures about 150300 nanometers; a human hair is roughly 100,000 nanometers thick.

In a separate experiment, Ozcan's team also detected nanoparticles specially marked fluorescent beads made of polystyrene as small as 90-100 nanometers.

To verify these results, researchers in Ozcan's lab used other imaging devices, including a scanning electron microscope and a photon-counting confocal microscope. These experiments confirmed the findings made using the new cellphone-based imaging device.

Ozcan is the principal investigator on the research. The first author of ACS Nano the paper is Qingshan Wei, a postdoctoral researcher in Ozcan's lab and at UCLA's California NanoSystems Institute (CNSI), where Ozcan is associate director. Other co-authors include Hangfei Qi and Ting-Ting Wu of the UCLA Department of Molecular and Medical Pharmacology; Wei Luo, Derek Tseng, Zhe Wan and Zoltan Gorocs of the UCLA Electrical Engineering Department; So Jung Ki of the UCLA Department of Chemistry and Biochemistry; Laurent Bentolila of CNSI and the UCLA Department of Chemistry and Biochemistry; and Ren Sun of the UCLA Department of Molecular and Medical Pharmacology and CNSI.


'/>"/>

Contact: Bill Kisliuk
bkisliuk@support.ucla.edu
310-206-0540
University of California - Los Angeles
Source:Eurekalert

Related biology technology :

1. Researchers produce nanostructures with potential to advance energy devices
2. Researchers discover breakthrough technique that could make electronics smaller and better
3. GridGain Enables Portland State Univ. Researchers to Push Boundaries of Science
4. Reproducing natures chemistry: Researchers alter molecular properties in a new way
5. IntelLiDrives XYZ Robot Helps Researchers to Develop Weather-resistant Crops
6. Researchers figure out how to grow carbon nanotubes with specific atomic structures
7. Opertech Bio Researchers Develop Method For High-Throughput Taste Evaluation
8. Sarcoma Alliance Announces Tissue Bank to Help Researchers
9. BioInformatics LLC—New Report Finds High Degree of Satisfaction With Instrumentation Performance Among Researchers
10. York Nanocentre researchers image individual atoms in a living catalytic reaction
11. Medrio, a Leading EDC Provider for Clinical Research, Announces Its Latest Version, 8.1 with iPad Support, is Available Without Charge for Academic Researchers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/16/2017)... , ... January 16, 2017 , ... ... the prestigious Tibbetts Award from the U.S. Small Business Administration. The ... created a significant economic or social impact […] and are considered the best of ...
(Date:1/13/2017)... Jan 13, 2017 Research and Markets has announced ... their offering. ... biopolymers market to grow at a CAGR of 16.83% during the period ... growth prospects of the global biopolymers market for 2017-2021. To calculate the ... sales of biopolymer products. The report also includes a a discussion of ...
(Date:1/12/2017)... ... January 12, 2017 , ... Each year, Crain’s Detroit Business News ranks the ... evaluates the patent estate of a company, its impact and significance, and the likelihood ... the way in technologies that transform energy sources such as low dose X-ray and ...
(Date:1/12/2017)... 12, 2017   Protein Sciences Corporation , ... Flublok Influenza Vaccine ®, announced today that ... good safety results and induced strong neutralizing antibodies ... product is expected to advance into human clinical ... the Institute of Technology in Immunobiologicals of the ...
Breaking Biology Technology:
(Date:12/16/2016)... global wearable medical device market, in terms of value, is projected ... in 2016, at a CAGR of 18.0% during the forecast period. ... Growth in ... launch of a growing number of smartphone-based healthcare apps compatible with ... increasing focus on physical fitness. Furthermore, growing trend ...
(Date:12/15/2016)... ... Markets has announced the addition of the "Global Military Biometrics Market ... the global military biometrics market to grow at a CAGR of 7.5% ... based on an in-depth market analysis with inputs from industry experts. The ... years. The report also includes a discussion of the key vendors operating ...
(Date:12/15/2016)... "Increase in mobile transactions is driving the growth of ... expected to grow from USD 4.03 billion in 2015 ... of 29.3% between 2016 and 2022. The market is ... smart devices, government initiatives, and increasing penetration of e-commerce ... to grow at a high rate during the forecast ...
Breaking Biology News(10 mins):