Super small nanoelectrodes can probe microscale environments

CHAMPAIGN, Ill. -- Investigating the composition and behavior of microscale environments, including those within living cells, could become easier and more precise with nanoelectrodes being developed at the University of Illinois.

"The individual nanotube-based probes can be used for electrochemical and biochemical sensing," said Min-Feng Yu, a U. of I. professor of mechanical science and engineering, and a researcher at the universitys Beckman Institute. "The position of the nanoelectrodes can be controlled very accurately."

To fabricate the nanoelectrodes, Yu and graduate students Kyungsuk Yum, Jie Hu and Han Na Cho begin by attaching a strong, rigid, boron-nitride nanotube to a much larger, conductive probe. The nanotube will form the insulating core of the nanoelectrode.

The researchers then coat the nanotube with a thin film of gold about 10-50 nanometers thick (a nanometer is 1 billionth of a meter.) The gold layer is then coated with an insulating polymer coating about 10 nanometers thick. Lastly, the researchers use a focused ion beam to slice off the end of the nanotube, exposing a conducting ring of gold sandwiched between an insulating core and an insulating outer ring.

The process yields nanoelectrodes with a diameter of 100 nanometers, and a length of up to 30 microns.

Because the nanotube is attached to a much larger probe, the researchers can manipulate the nanotube like a needle. They can control precisely where the nanotube penetrates a cell, for example, and even pinpoint smaller cell structures, such as the nucleus or mitochondrion.

"Nanoelectrodes offer new opportunities for electrochemical sensing in intracellular environments," said Yu, who will describe the fabrication process and demonstrate the feasibility of nanoelectrodes at the March meeting of the American Physical Society, to be held in Denver, March 5-9. "By functionalizing the active area of the nanoelectrode with an appropriate chemical, we can target

Contact: James E. Kloeppel
University of Illinois at Urbana-Champaign

Page: 1 2

Related biology news :

1. Super fruit fly may lead to healthier humans
2. Nitrate in Lake Superior: On the rise
3. Supermap of avian flu yields new info on source/spread
4. Super-fermenting fungus genome sequenced
5. Super-thin membrane, 50 atoms thick, sorts individual molecules
6. Microsurgery and Super Glue show how antennae aid moth navigation
7. Supercomputing equipment to advance the frontiers of computational biology
8. Super chow, laced with semi-synthetic vitamin E derivative, inhibited spread of cancer in mice
9. Super blackcurrants with boosted vitamin C
10. Supercomputers to transform science
11. Super-sized cassava plants may help fight hunger in Africa

Post Your Comments:

(Date:5/16/2016)...   EyeLock LLC , a market leader of ... an IoT Center of Excellence in Austin, ... of embedded iris biometric applications. EyeLock,s iris ... security with unmatched biometric accuracy, making it the most ... EyeLock,s platform uses video technology to deliver a fast ...
(Date:4/28/2016)... 28, 2016 First quarter 2016:   ... compared with the first quarter of 2015 The gross ... M (loss: 18.8) and the operating margin was 40% (-13) ... Cash flow from operations was SEK 249.9 M (21.2) , ... is unchanged, SEK 7,000-8,500 M. The operating margin for ...
(Date:4/15/2016)... , April 15, 2016 ... "Global Gait Biometrics Market 2016-2020,"  report to their ... ) , ,The global gait biometrics market ... 13.98% during the period 2016-2020. Gait ... which can be used to compute factors that ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , ... June 23, 2016 , ... ... pleased to announce the launch of their brand, UP4™ Probiotics, into Target stores ... 35 years, is proud to add Target to its list of well-respected retailers. ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... ... Plate® YM (Yeast and Mold) microbial test has received AOAC Research Institute approval ... of microbial tests introduced last year,” stated Bob Salter, Vice President of Regulatory ...
(Date:6/23/2016)... OTTAWA, ON (PRWEB) , ... June 23, 2016 , ... ... former DNA Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA ... joining the STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. ...
(Date:6/23/2016)... June 23, 2016 On Wednesday, June ... 4,833.32, down 0.22%; the Dow Jones Industrial Average edged 0.27% ... at 2,085.45, down 0.17%. Stock-Callers.com has initiated coverage on the ... Nektar Therapeutics (NASDAQ: NKTR ), Aralez Pharmaceuticals Inc. ... BIND ). Learn more about these stocks by ...
Breaking Biology Technology:
Cached News: