Featured Research

from universities, journals, and other organizations

University At Buffalo Engineer Develops Novel Method For Assembly Of Nanoparticles; Process May Lead To Manufacture Of Nanoscale Devices

Date:
December 4, 2002
Source:
University At Buffalo
Summary:
A University at Buffalo engineer has developed a novel method for assembling nanoparticles into three-dimensional structures that one day may be used to produce new nanoscale tools and machines.

BUFFALO, N.Y. -- A University at Buffalo engineer has developed a novel method for assembling nanoparticles into three-dimensional structures that one day may be used to produce new nanoscale tools and machines.

Related Articles


The work could be an important step in fulfilling the immense potential of nanotechnology because it gives scientists and engineers improved control and flexibility in the creation of materials for the manufacture of many nanoscale devices, according to Paschalis Alexandridis, associate professor of chemical engineering in UB's School of Engineering and Applied Sciences.

Alexandridis and postdoctoral research associate Aristides Docoslis used non-uniform AC electric fields generated by microfabricated electrodes -- which create a motion known as dielectrophoresis -- to stack latex, silica or graphite microparticles into two- and three-dimensional structures of prescribed lengths and composition, held together by the electrical field.

The same process can be applied to nanoparticles, says Alexandridis, whose research is funded by a $100,000 Nanoscale Exploratory Research (NER) grant from the National Science Foundation, Division of Design, Manufacture and Industrial Innovation.

"This process enables you to guide particles to where you want them to go and then scale them up into ordered structures with desired electrical, optical or mechanical properties," explains Alexandridis. "You can use this process to create a well-defined object and assemble it on demand, which means these materials can actually be used to manufacture nanoscale tools or devices," he adds. "This may be particularly applicable for the manufacture of sensors and photonic devices."

Adaptability is an attractive feature of the process, Alexandridis says. The process can be used to direct and manipulate almost any particle, he explains, whether the particle has a net charge or not, or is suspended in an aqueous or non-aqueous medium. "Because of this flexibility, there's no limit to the applications of this process," Alexandridis says. "That's another advantage for the manufacturability of this method."

Focusing on the dielectrophoresis process, Alexandridis is developing models to predict how various particles, and combination of particles, will behave under the influence of different electrical fields, as a function of particle size and properties, electrode dimensions and pattern, and applied voltage and frequency. This information will help guide future nanomanufacturing applications, he says.

Alexandridis also is developing ways to glue particles together after the electrical field has assembled them. "The goal is to link the particles in a way that doesn't change the properties of the structure, but which makes the structure permanent and resilient," he says. "After you glue the particles together you can switch off the electrical field and have a free-standing, ordered structure."

"Or you can change the field frequency so that you can remove selectively the unglued particles," he adds. Results from Alexandridis' and Docoslis' research were published recently in Electrophoresis (2002, 23, 2174-2183).

Nanotechnology is a potentially revolutionary and lucrative scientific industry, with experts predicting manufacture and commercialization of microscopic products benefiting the fields of electronics, medicine, supercomputing, energy and environmental cleanup.


Story Source:

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


Cite This Page:

University At Buffalo. "University At Buffalo Engineer Develops Novel Method For Assembly Of Nanoparticles; Process May Lead To Manufacture Of Nanoscale Devices." ScienceDaily. ScienceDaily, 4 December 2002. <www.sciencedaily.com/releases/2002/12/021204081355.htm>.
University At Buffalo. (2002, December 4). University At Buffalo Engineer Develops Novel Method For Assembly Of Nanoparticles; Process May Lead To Manufacture Of Nanoscale Devices. ScienceDaily. Retrieved December 29, 2014 from www.sciencedaily.com/releases/2002/12/021204081355.htm
University At Buffalo. "University At Buffalo Engineer Develops Novel Method For Assembly Of Nanoparticles; Process May Lead To Manufacture Of Nanoscale Devices." ScienceDaily. www.sciencedaily.com/releases/2002/12/021204081355.htm (accessed December 29, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Monday, December 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drone Owners, Here's What To Know Before Taking Flight

Drone Owners, Here's What To Know Before Taking Flight

Newsy (Dec. 28, 2014) — As drones become more popular in the U.S. there's plenty of confusion about how they can be used without breaking the law. Video provided by Newsy
Powered by NewsLook.com
Christmas Gifted Drones Are Already Causing Problems

Christmas Gifted Drones Are Already Causing Problems

Newsy (Dec. 25, 2014) — Commercial drones were a popular gift this Christmas, but flying one is harder than it looks, and the results can range from comical to catastrophic. Video provided by Newsy
Powered by NewsLook.com
NASA Cameras Capture Solar Flare

NASA Cameras Capture Solar Flare

Reuters - US Online Video (Dec. 25, 2014) — NASA cameras capture images of intense solar flare on the sun. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Ukrainian Coal Miners Work to Stave Off Electricity Shortage

Ukrainian Coal Miners Work to Stave Off Electricity Shortage

AFP (Dec. 24, 2014) — Coal miners in the separatist east of Ukraine work to ensure there won't be electricity shortages during the coldest months of winter, but the country has declared a state of emergency in its electricity market. Duration: 00:59 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

 

Space & Time

Matter & Energy

Computers & Math

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