Navigation Links
Electronic nose out in front
Date:5/3/2012

Chemical sensors are exceedingly good at detecting a single substance or a class of chemicals, even at highly rarified concentrations. Biological noses, however, are vastly more versatile and capable of discriminating subtle cues that would confound their engineered counterparts. Unfortunately, even highly trained noses do leave a certain ambiguity when relaying a signal and are not particularly suited for work in specialized situations like operating rooms. A new DNA-based chemical sensor appears to be both extremely sensitive and discerning, making it an important stride on the path to an all-electronic nose.

A team of researchers report in a paper published in the American Institute of Physics' journal AIP Advances that specially tailored strands of DNA attached to carbon nanotubes can tell the difference between very similar molecules, even those that have an identical chemical makeup. "We're trying to develop this into an electronic nose system," says A.T. Charlie Johnson, a physicist at the University of Pennsylvania and study co-author. "We used this system to distinguish between optical isomers, molecules that are nearly identical except that one is structurally reversed a mirror image."

The system works by affixing DNA strands to carbon nanotubes, which are excellent electrical conductors. The DNA strands have been fine-tuned to respond to particular chemicals, so when strands come in contact with a target chemical even at very low concentrations it produces a measurable electrical signal along the nanotube. The sensors were able to check for molecules that differ by as little as one carbon atom. Though the researchers are not the first to observe this effect, they have achieved an unprecedented level of differentiation for an all-electronic chemical detector. "What I'm focusing on is the size of the difference in the signal," says Johnson.

The researchers are next interested in creating something akin to an actua
'/>"/>

Contact: Charles Blue
cblue@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Bottoms up: Better organic semiconductors for printable electronics
2. Free White Paper Now Available: How to get the most from your visit to electronica 2008 in Munich
3. BioElectronics Corp Aggressively Expands Sales into Middle East
4. BioElectronics Corp. Announces $400,000 in New Orders From the Middle East
5. Akaza Research Releases New Version of OpenClinica Electronic Data Capture (EDC) Software; Targets Industry Clinical Trials
6. SAFC Hitech(TM) Expands Electronic Materials Portfolio With the Introduction of Scintillation Crystal Growth Halides
7. BioElectronics Announces Significant Progress in Canadian and International Distribution
8. OmniComm Systems, Inc. Is Fueled by Another Strong Quarter Delivering Electronic Data Capture (EDC) Solutions & Services
9. MicroDose and Nexus6 Announce Collaboration to Evaluate Application of Remote Patient Compliance Monitoring Technology with MicroDoses Electronic Dry Powder Inhaler
10. Tully-Wihr Company Selects Web-Based Allscripts Electronic Health Record for 100 Northern California Physicians
11. Eurotech Catalyst Module Awarded to Allen Organ Company From Arrow Electronics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... DES MOINES, Iowa (PRWEB) July 23, 2014 ... will join the business as vice president of Agricultural ... from Mendel Biotechnology where he served most recently as ... brings extensive biotechnology and business leadership in the seed ... DuPont Pioneer,” said Paul E. Schickler , president ...
(Date:7/23/2014)... , July 23, 2014  Sofinnova Ventures, a ... today announced the closing of Sofinnova Venture Partners IX, ... in excess of the initial fund target of $425 ... build successful biotechnology companies. Consistent with recent funds, SVP ... later stage clinical programs, along with select investments in ...
(Date:7/23/2014)... (PRWEB) July 23, 2014 Adult ... transplant therapies are biological, but not magical. ... seem to treat them as if they were ... as unsanctioned studies that constitute “stem cell tourism,” ... an approach to developing new regenerative medicine therapies. ...
(Date:7/22/2014)... from the National Institute of Standards and Technology ... demonstrated a new design for an atomic clock ... or a microcomb. , The microcomb clock, featured ... the new journal Optica ,* is the ... and its accurate conversion of optical frequencies to ...
Breaking Biology Technology:DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 2DuPont Pioneer Names Neal Gutterson to Lead Agricultural Biotechnology 3Sofinnova Raises $500 Million Biotech Venture Fund 2The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 2The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 3The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 4The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 5'Comb on a chip' powers new NIST/Caltech atomic clock design 2
... Blood America, Inc. (OTC Bulletin Board: CBAI), the umbilical ... focused on bringing the life saving potential of stem ... announce that between January 1, 2009, and today, it ... million.The Company previously said in press releases and CEO ...
... Technologies, Inc. (NYSE Alternext US: PTN) will announce its ... February 17, 2009 before the open of the U.S. ... live audio webcast hosted by its executive management team ... the results of operations in greater detail and an ...
... Nektar Therapeutics,(Nasdaq: NKTR ) will announce its ... 31, 2008 on Wednesday, February 25, 2009, after the ... chief executive,officer, will host a conference call to review ... Pacific Time (PT). , The ...
Cached Biology Technology:Cord Blood Announces $1 Million Reduction in Long Term Debt 2Palatin Technologies to Report Fiscal Year 2009 Second Quarter Results; Conference Call and Webcast on February 17, 2009 2Nektar to Announce Year-End 2008 Financial Results on Wednesday, February 25, 2009 After Close of U.S.-Based Financial Markets 2
(Date:7/22/2014)... A new study that examined the survival rates ... bycatch in commercial longline fishing operations found large ... bigeye thresher, dusky, and scalloped hammerhead being the ... University of Miami (UM) Rosenstiel School of,Marine and ... Science and Policy, provides,new information to consider for ...
(Date:7/22/2014)... collaboration known as the ,1000 Bull Genomes Project, aims ... dairy cattle while also improving animal health and welfare. ... sequencing the whole genomes of 234 individual bulls whose ... are reported in the journal Nature Genetics . ... this information to reduce or eliminate hereditary diseases and ...
(Date:7/22/2014)... from the National Institute of Standards and Technology ... a dramatically improved technique for analyzing biological cells ... The new NIST technique is an advanced form ... one that delivers signals that are 10,000 times ... 100 times stronger than obtained from comparable "coherent ...
Breaking Biology News(10 mins):New study reveals vulnerability of sharks as collateral damage in commercial fishing 2Whole-genome sequencing of bulls in key beef and dairy breeds 2Enhanced NIST instrument enables high-speed chemical imaging of tissues 2Enhanced NIST instrument enables high-speed chemical imaging of tissues 3
... 2014 FASEB Science Research Conference focuses on recent ... (cobalamin), methionine and sulfur amino acid metabolism as ... health and policy, genetics, basic biology and clinical ... held every two years since 1986, attracts a ...
... This 2014 FASEB Science Research Conference will ... underlying the structure and function of membranes and ... the 2014 meeting include interfacially active peptides, membrane ... membrane protein structure, function and folding. ...
... Research Conference focuses on recent advances in understanding the ... The retina is fundamentally important for vision, and its ... and cellular mechanisms of a sensory circuit in the ... stimulus. As a result, retinal neurobiology continues ...
Cached Biology News:
RECK (F-20)...
The improved design and new mechanical solutions of Finnpipette Focus Multichannel Plus improves accuracy and precision.In these low volume multichannel pipettes, the super blow-out function ensures ...
NAK/TBK1 (CT) Affinity Purified Polyclonal Antibody...
... White lyophilized solid. PROTECT FROM LIGHT. PACKAGED ... of γ-secretase. Equipotently inhibits the release of ... 2.6 μM) and Aβ x-42 (ED ... cells stably transfected with the Amyloid Precursor ...
Biology Products: