Navigation Links
With a jolt, 'nanonails' go from repellant to wettable

MADISON -- Sculpting a surface composed of tightly packed nanostructures that resemble tiny nails, University of Wisconsin-Madison engineers and their colleagues from Bell Laboratories have created a material that can repel almost any liquid.

Add a jolt of electricity, and the liquid on the surface slips past the heads of the nanonails and spreads out between their shanks, wetting the surface completely.

The new material, which was reported this month in Langmuir, a journal of the American Chemical Society, could find use in biomedical applications such as "lab-on-a- chip" technology, the manufacture of self-cleaning surfaces, and could help extend the working life of batteries as a way to turn them off when not in use.

UW-Madison mechanical engineers Tom Krupenkin and J. Ashley Taylor and their team etched a silicon wafer to create a forest of conductive silicon shanks and non-conducting silicon oxide heads. Intriguingly, the ability of the surface of the structure to repel water, oil, and solvents rests on the nanonail geometry.

"It turns out that what's important is not the chemistry of the surface, but the topography of the surface," Krupenkin explains, noting that the overhang of the nail head is what gives his novel surface its dual personality.

A surface of posts, he notes, creates a platform so rough at the nanoscale that "liquid only touches the surface at the extreme ends of the posts. It's almost like sitting on a layer of air."


Contact: Tom Krupenkin
University of Wisconsin-Madison

Page: 1

Post Your Comments:
(Date:12/1/2015)... 2015 ) ... U.K. Virology and Bacteriology Testing Market: Sales ... Supplier Shares by Test, Innovative Technologies, Competitive ... --> ) has announced ... and Bacteriology Testing Market: Sales and Volume ...
(Date:11/30/2015)... ... November 30, 2015 , ... Global Stem Cells ... stages of a new closed system for isolating adipose-derived stem cells. The announcement starts ... (SVF) of adipose tissue. SVF is a component of the lipoaspirate obtained from liposuction ...
(Date:11/30/2015)... ... 2015 , ... Global Stem Cells Group announced the opening of a new core ... and Iquique in northern Chile. The facilities are part of GSCG’s expansion efforts in Latin ... techniques in stem cell medicine to patients from around the world. , The clinics will ...
(Date:11/30/2015)... (NYSE: BIOA ), a leader in renewable materials, today ... Climate Pledge, alongside more than 140 companies from across the ... demonstrate an ongoing commitment to climate action and to voice ... Paris climate negotiations. Sarnia, Canada ... --> BioAmber uses biotechnology to convert renewable sugars ...
Breaking Biology Technology:
(Date:10/29/2015)... Oct. 29, 2015  Connected health pioneer, Joseph ... explosion of technology-enabled health and wellness, and the business ... The Internet of Healthy Things . ... smartphones even existed, Dr. Kvedar, vice president, Connected Health, ... care delivery, moving care from the hospital or doctor,s ...
(Date:10/27/2015)... , Oct. 27, 2015 In the ... issues of concern for various industry verticals such as ... due to the growing demand for secure & simplified ... various ,sectors, such as hacking of bank accounts, misuse ... electronic equipment such as PC,s, laptops, and smartphones are ...
(Date:10/26/2015)... , October 26, 2015 /PRNewswire/ ... --> adds Biometrics ... to 2021 as well as Emerging ... research reports to its collection of ... . --> ...
Breaking Biology News(10 mins):