HOME >> BIOLOGY >> NEWS
Tiny paddle oscillator senses the mass of a virus

ITHACA, N.Y. -- By using a device only six-millionths of a meter long, researchers at Cornell University have been able to detect the presence of as few as a half-dozen viruses -- and they believe the device is sensitive enough to notice just one.

The research could lead to simple detectors capable of differentiating between a wide variety of pathogens,i ncluding viruses, bacteria and toxic organic chemicals.

The experiment, an extension of earlier work in which similar devices were used to detect the mass of a single bacterium, is reported in a paper, "Virus detection using nanoelectromechanical devices," in the September 27, 2004, issue ofApplied Physics Letters by Cornell research associate Rob Ilic of the Cornell NanoScale Facility (CNF), Yanou Yang, a Cornell graduate student in biomedical engineering, and Harold Craighead, Cornell professor of applied and engineering physics. The work was done with the assistance of Michael Shuler, Cornell professor of chemical and biological engineering, and microbiologist Gary Blissard of the Boyce Thompson Institute for Plant Research on the Cornell campus.

At CNF, the researchers created arrays of tiny silicon paddles from 6 to 10 micrometers (millionths of a meter) long, half a micrometer wide, and about 150 nanometers (billionths of a meter) thick, with a one-micrometer square pad at the end. Think of a tiny fly-swatter mounted by its handle like a diving board. A large array of paddles were mounted on a piezoelectric crystal that can be made to vibrate at frequencies on the order of 5 to 10 megaHertz (mHz). The experimenters then varied the frequency of vibration of the crystal. When it matched the paddles' resonant frequency, the paddles began to vibrate, as measured by focusing a laser on the paddles and noting the change in reflected light, a process called optical interferometry.

The natural resonant frequency at which something vibrates depends on, among other things, its mass. A
'"/>

Contact: Bill Steele
ws21@cornell.edu
607-255-7164
Cornell University News Service
4-Nov-2004


Page: 1 2 3

Related biology news :

1. Monkeys understand numbers across senses
2. Features of replication suggest viruses have common themes, vulnerabilities
3. Marijuana component opens the door for virus that causes Kaposis sarcoma
4. Discovery in plant virus may help prevent HIV and similar viruses
5. Detecting transmissibility of avian influenza virus in human households
6. CTRC enrolls first patients in novel phase II study for sarcoma -- living virus destroys cancer cell
7. Expert to provide update after worst tomato virus hits California
8. University of Colorado licenses two influenza virus detection discoveries to Quidel Corp.
9. Modified herpes virus keeps arteries free-flowing following procedures
10. MIT, BU team builds viruses to combat harmful biofilms
11. First all-African produced genetically engineered maize is resistant to maize streak virus

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/16/2016)... NEW YORK , May 16, 2016   ... authentication solutions, today announced the opening of an IoT ... to strengthen and expand the development of embedded ... provides an unprecedented level of convenience and security with ... to authenticate one,s identity aside from DNA. EyeLock,s platform ...
(Date:5/9/2016)... 2016 Elevay is currently known ... freedom for high net worth professionals seeking travel for ... connected world, there is still no substitute for a ... sealing your deal with a firm handshake. This is ... advantage of citizenship via investment programs like those offered ...
(Date:4/28/2016)... FRANCISCO and BANGALORE, India , ... of EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... provider, today announced a global partnership that will ... way to use mobile banking and payment services. ... is a key innovation area for financial services, but it ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... ... innovative medical technologies, services and solutions to the healthcare market. The company's primary ... various distribution, manufacturing, sales and marketing strategies that are necessary to help companies ...
(Date:6/24/2016)... 2016 Epic Sciences unveiled a liquid ... to PARP inhibitors by targeting homologous recombination deficiency ... new test has already been incorporated into numerous ... types. Over 230 clinical trials are ... including PARP, ATM, ATR, DNA-PK and WEE-1. Drugs ...
(Date:6/23/2016)...   Boston Biomedical , an industry leader ... target cancer stemness pathways, announced that its lead ... Designation from the U.S. Food and Drug Administration ... gastroesophageal junction (GEJ) cancer. Napabucasin is an orally ... stemness pathways by targeting STAT3, and is currently ...
(Date:6/23/2016)... SANTA MONICA, Calif. , June 23, 2016  The Prostate Cancer ... to pioneer increasingly precise treatments and faster cures for prostate cancer. Members of ... 77 institutions across 15 countries. Read More About the ... ... ...
Breaking Biology Technology:
Cached News: