Navigation Links
'Watermark ink' device identifies unknown liquids instantly
Date:8/3/2011

Cambridge, Mass. - August 3, 2011 - Materials scientists and applied physicists collaborating at Harvard's School of Engineering and Applied Sciences (SEAS) have invented a new device that can instantly identify an unknown liquid.

The device, which fits in the palm of a hand and requires no power source, exploits the chemical and optical properties of precisely nanostructured materials to distinguish liquids by their surface tension.

The finding, published in the Journal of the American Chemical Society (JACS), offers a cheap, fast, and portable way to perform quality control tests anddiagnose liquid contaminants in the field.

"Digital encryption and sensors have become extremely sophisticated these days, but this is a tool that will work anywhere, without extra equipment, and with a verywide range of potential applications," says co-principal investigator Marko Lončar, Associate Professor of Electrical Engineering at SEAS.

Akin to the litmus paper used in chemistry labs around the world to detect the pH of a liquid, the new device changes color when it encounters a liquid with a particular surface tension. A single chip can react differently to a wide range of substances; it is also sensitive enough to distinguish between two very closely related liquids.

A hidden message can actually be "written" on a chip, revealing itself only when exposed to exactly the right substance. Dipped in another substance, the chip can display a different message altogether (see video).

"This highly selective wetting would be very difficult to achieve on a two-dimensional surface," explains lead author Ian B. Burgess, a doctoral candidate in Lončar's lab and in the Aizenberg Biomineralization and Biomimetics Lab. "The optical and fluidic properties we exploit here are unique to the 3D nanostructure of the material."

The "Watermark Ink," or "W-Ink," concept relies on a precisely fabricated material called an i
'/>"/>

Contact: Caroline Perry
cperry@seas.harvard.edu
617-496-1351
Harvard University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mobile Devices Pose New Security Risks for Patients; Five Experts Share Insights on mHealth
2. Soft memory device opens door to new biocompatible electronics
3. Health-care practitioners stories can aid medical device designers
4. UBC researchers invent new drug delivery device to treat diabetes-related vision loss
5. Student team invents device to cut dialysis risk
6. Stretching old material yields new results for energy- and environment-related devices
7. Device could improve harvest of stem cells from umbilical cord blood
8. U.S. Biomedical Leaders Present a New National Device Innovation Strategy Based on "Value-driven Engineering"
9. Single GFP-expressing cell is basis of living laser device
10. Stamping out low cost nanodevices
11. Noninvasive wireless near-infrared device provides reliable diagnosis of bladder dysfunction
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/3/2014)... Ariz. , Dec. 2, 2014 As ... hand readers, Inception Technologies is pleased to announce the ... easier for customers to collect the workforce data that ... problems that have been left by existing readers. Many ... user interface, connectivity and modern technology. Older models force ...
(Date:11/21/2014)... Calif. , Nov. 20, 2014 Strict ... driver efficiency are piloting the North American and European ... of accidents growing, gesture recognition systems that are intuitive ... a mark in the industry. New ... Automotive Gesture Recognition Market in Europe ...
(Date:11/18/2014)... Nov. 18, 2014  The Secure Identity & ... today jointly announce the formation of The Airport ... its Identity and Biometric Entry and Exit ... received official support from BORDERPOL, the international non-profit ... and provide expertise regarding border security, traveler and ...
Breaking Biology News(10 mins):Inception Technologies to Release New Biometric Reader 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3
... Southwestern Medical Center have found an enzyme vital for controlling ... process when it works right, but malignant in a variety ... examining tissue from cancer patients to try to determine how ... “We think this gene will really be a hot spot ...
... to find alternative fuel sources are lighting a fire under ... , Texas Senate Bill 20, signed this week by Gov. ... biomass can be used. The new law requires more renewable ... years. , Combining consumer energy needs and agriculture industry trends ...
... by biologists at the University of California, Berkeley, has found ... reaction that leads to the increased expression of a marker ... to be published July 3 in an advanced online issue ... the natural killer (NK) cells - which are able to ...
Cached Biology News:UT Southwestern researchers discover master switch in cell death 2Researchers find ways to turn manure into power 2Researchers find ways to turn manure into power 3New study finds how cells with damaged DNA alert the immune system 2New study finds how cells with damaged DNA alert the immune system 3
(Date:12/24/2014)... Dec. 23, 2014 China Biologic Products, ... a leading fully integrated plasma-based biopharmaceutical company in ... its majority-owned subsidiary, Shandong Taibang Biological Products Co. ... from the China Food and Drug Administration (the ... As previously disclosed in the Company,s public filings, ...
(Date:12/24/2014)... NEW YORK , Dec. 23, 2014 /PRNewswire/ ... study of mazindol in children with attention deficit/hyperactivity disorder ... December 2014 . The paper, titled ... attention deficit/hyperactivity disorder" ( Konofal et al, ... eCollection 2014 ) shows that mazindol might be ...
(Date:12/22/2014)... SAN DIEGO , Dec. 22, 2014 ... that the Decipher Prostate Cancer Classifier, a genomic test ... disease in node-negative, high-risk men managed by radical prostatectomy ... with radical prostatectomy is relatively uncommon, using tumor genomics ... form of metastatic disease is an important advance. The ...
(Date:12/19/2014)... (PRWEB) December 19, 2014 Bioject ... developer and manufacturer of needle-free injection technology, today ... with Immunomic Therapeutics, Inc. (“ITI”) for ITI to ... with its LAMP™ vaccine platform. , In ... exclusive Worldwide license to the Biojector®-2000 that triggers ...
Breaking Biology Technology:China Biologic Receives GMP Certification for New Coagulation Factor Facility 2China Biologic Receives GMP Certification for New Coagulation Factor Facility 3Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3Study 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 3Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 3
... of 2008 R&D 100 Awards Now Online, ROCKAWAY, ... for the 8th Annual Innovator of the Year and ... who exemplify the,ideals of R&D in academia, industry, and ... online with ten finalists,-- five scientists and five innovators ...
... SHP, NASDAQ: SHPGY), the global specialty biopharmaceutical company,announces that ... on September 24, 2008, the Company has changed its ... plc,s ticker symbols on the London Stock Exchange and ... and American Depositary,Shares will remain unchanged., Notes to ...
... that Dr. Francis Stoessel, a leading Process Safety Consultant ... Keynote Speaker in the Process Safety and Thermal Hazard ... ... Columbia, MD (PRWEB) October 1, 2008 -- ...
Cached Biology Technology:2008 R&D Innovator of the Year & Scientist of the Year Finalists Announced 2
... GeneBLAzer cell-based assays utilize the ... of the negatively charged fluorescent beta-lactamase ... esters readily enter the cell, where ... converts them into their negatively charged ...
Many mammalian cell types and experimental situations create challenges for standard transfection experiments. The ViraPower Lentiviral Expression System overcomes these challenges with efficient vir...
... the membrane-permeant ester forms (CCF2-AM and ... beta-lactamase substrates, CCF2 and CCF4. These ... where cleavage by endogeneous cytoplasmic esterases ... charged forms, thereby trapping them in ...
Src cDNA Expression Kit (wild type)...
Biology Products: