Featured Research

from universities, journals, and other organizations

Hope For Nano-Scale Delivery Of Medicine Using A Light Beam To Move Liquid Through Tiny Tubes

Date:
September 2, 2002
Source:
Arizona State University
Summary:
Medical researchers would like to use nano-scale tubes to push very tiny amounts of drugs dissolved in water to exactly where they are needed in the human body.

Medical researchers would like to use nano-scale tubes to push very tiny amounts of drugs dissolved in water to exactly where they are needed in the human body. The roadblock to putting this theory into practical use has been the challenge of building pumps small enough to do the job. In addition to the engineering challenge of building a nano-scale pump, there is the added complication of clogging by any biological molecule that can occur in valves small enough to fit a channel the size of bacteria.

Related Articles


The solution – discovered by researchers at Arizona State University – is to create a system that does not rely on mechanical parts.

The ASU team of scientists and engineers reports in the American Chemical Society journal Langmuir (Thursday, August 29, 2002) on a technique they developed to pull water up a tube tinier than a straw by shining a beam of light on the surface of the tube. This technological advance, referred to as photocapillarity, may one day find a use in nanotechnology applications, such as the targeted distribution of medicine in the body.

"As the size of capillaries or channels in devices shrinks, it becomes very difficult to control the movement of "liquid," says Dr. Antonio Garcia, Arizona State University Bioengineering professor. "The everyday use of mechanical valves and pumps becomes difficult in nanotechnology because making them tinier is a manufacturing challenge. Also, any real-life application would be prone to operational problems, such as clogging of the pump or valve by tiny molecules."

Garcia, and colleagues Devens Gust and Mark Hayes, professors in the ASU Department of Chemistry & Biochemistry, have combined their bioengineering and chemistry skills to build upon the research on light responsive molecules.

With proceeds from a National Science Foundation grant, the researchers found a way of attaching the molecules to the surface and structuring the surrounding surface to control the spread of water.

"When we shine light just beyond the visible range, the light responsive molecules attract water and trigger the advancement of water through the channel," says Garcia.

An added benefit to the research is the development of a science lab demonstration. By the end of the year, students and teachers can order inexpensive glass tubes prepared by the ASU researchers and a laboratory guide to exploring the phenomena.

"Our hope is that by making this lab kit available it will stimulate the creativity of the next generation of scientists and engineers who will routinely design new products using nanotechnology," Garcia says.


Story Source:

The above story is based on materials provided by Arizona State University. Note: Materials may be edited for content and length.


Cite This Page:

Arizona State University. "Hope For Nano-Scale Delivery Of Medicine Using A Light Beam To Move Liquid Through Tiny Tubes." ScienceDaily. ScienceDaily, 2 September 2002. <www.sciencedaily.com/releases/2002/08/020830071907.htm>.
Arizona State University. (2002, September 2). Hope For Nano-Scale Delivery Of Medicine Using A Light Beam To Move Liquid Through Tiny Tubes. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2002/08/020830071907.htm
Arizona State University. "Hope For Nano-Scale Delivery Of Medicine Using A Light Beam To Move Liquid Through Tiny Tubes." ScienceDaily. www.sciencedaily.com/releases/2002/08/020830071907.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Winter Can Cause Depression — Here's How To Combat It

Winter Can Cause Depression — Here's How To Combat It

Newsy (Nov. 23, 2014) Millions of American suffer from seasonal depression every year. It can lead to adverse health effects, but there are ways to ease symptoms. Video provided by Newsy
Powered by NewsLook.com
Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
Don't Fall For Flu Shot Myths

Don't Fall For Flu Shot Myths

Newsy (Nov. 23, 2014) Misconceptions abound when it comes to your annual flu shot. Medical experts say most people older than 6 months should get the shot. Video provided by Newsy
Powered by NewsLook.com
WFP: Ebola Risks Heightened Among Women Throughout Africa

WFP: Ebola Risks Heightened Among Women Throughout Africa

AFP (Nov. 21, 2014) Having children has always been a frightening prospect in Sierra Leone, the world's most dangerous place to give birth, but Ebola has presented an alarming new threat for expectant mothers. Duration: 00:37 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins