HOME >> BIOLOGY >> NEWS
MITs smart surface switches properties reversibly

anger, Lahann and Tran, other authors of the Science paper are former undergraduate Hiroki Kaido and former postdoctoral associate Insung S. Choi (both in chemical engineering); Samir Mitragotri and Jagannathan Sundaram of the University of California at Santa Barbara (Mitragotri is a former chemical engineering Ph.D. and postdoctoral associate); and Saskia Hoffer and Gabor A. Somorjai of the University of California at Berkeley.

MOLECULAR FOREST
The new switchable surface essentially consists of a forest of molecules only a billionth of a meter tall, engineered to stand at a precise distance from each other. In this particular case, the team makes the top of each molecule negatively charged and hydrophilic (water-loving), and the trunk positively charged and hydrophobic (water-repelling).

When a positive electrical potential is applied, the induced attractive force causes the top to bend down. The resulting loop that is now exposed is hydrophobic. Reverse the electrical potential and the molecules will straighten to their full height, the hydrophilic tops once more attracting water. Look at your hand, Langer explained. Imagine that your fingertips have property A and your knuckles have property B. Weve created a reversible way to move those fingers up and down, exposing either the fingertips or the knuckles with their different properties.

ADDING HATS
One important challenge for the team was finding a way to create a molecular forest, or self-assembled monolayer (SAM), with enough space between molecules to allow each to bend down. Conventional SAMs are characterized by very dense assemblies of molecules so tightly packed together that they have no room to move.

The MIT engineers solved the problem by adding bulky hats to each molecule during the assembly of the SAM, creating the equivalent of a field of molecular mushrooms. By then removing the hats, we ended up with a low-density monola
'"/>

Contact: Elizabeth Thomson
thomson@mit.edu
617-258-5402
Massachusetts Institute of Technology
16-Jan-2003


Page: 1 2 3

Related biology news :

1. Study of flu patients reveals virus outsmarting key drug
2. Muscles are smarter than you think
3. Purdue scientists finding ways to outsmart crop-damaging bugs
4. With natures help, a better vision system for smart weapons
5. UCSD researchers fabricate tiny smart dust particles
6. Scientists at the Scripps Research Institute design gene-tipped tumor regressor smartbombs
7. Researchers developing technology to outsmart metastasized cancers
8. How did we get so smart? Study sheds light on evolution of the brain
9. Pharmaceutical smart bomb targets cancer cells
10. Female birds choose best singers to have smarter offspring
11. Prosthetic limb to be controlled by microchip: Agreement signed to create smart leg

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: MITs smart surface switches properties reversibly

(Date:12/17/2014)... N.C. , Dec. 16, 2014 Valencell, ... licensed its PerformTek biometric technology to industry leaders such ... highly accurate, clinically validated, biometric wearable products. These products ... 6-9 in Las Vegas . ... technology is accurate, flexible and robust – with the ...
(Date:12/17/2014)... Dec. 16, 2014  Automation is fundamentally transforming ... evident than at international borders. Over the past ... have allowed veteran travelers to self process through ... (APC) Kiosks at an increasing number of airports, ... According to Maxine Most , ...
(Date:12/11/2014)... 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition ... Region 2015-2019"  report to their offering. ... is advances in technology. With continuous advances in ... to the latest standard that meets the needs ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
(Date:12/22/2014)... 22, 2014 GenomeDx Biosciences today announced that ... Classifier, a genomic test for prostate cancer, was able ... managed by radical prostatectomy without adjuvant therapy. Although rapid ... uncommon, using tumor genomics to identify these men who ... an important advance. The study has been published ...
(Date:12/22/2014)... TENN (PRWEB) December 22, 2014 Fertility ... Donor Egg Bank USA , a network of ... country. Through this partnership, patients have fast access to ... in vitro fertilization, IVF . Fertility Associates of Memphis ... offer this fertility treatment option. , Dr. William ...
(Date:12/19/2014)... Ill. , Dec. 19, 2014 Naurex ... develop novel drugs for diseases of the central nervous ... president and chief executive officer, will present at the ... Riedel,s presentation will take place at 3:00 p.m. PST ... Francis in San Francisco, Calif. ...
(Date:12/19/2014)... 19, 2014 Research and Markets ... the "Technology Innovations in Smart Fabrics (Technical ... http://photos.prnewswire.com/prnh/20130307/600769 The ... offers a detailed assessment on technological advancements and ... 1. The Smart Fabrics market ...
Breaking Biology Technology:Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2Technology Innovations in Smart Fabrics (Technical Insights) 2
Cached News: