Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Versatile High-Sensitivity Surface Stress Membrane Sensor

29.03.2011
An international team of researchers have developed a versatile and high-sensitivity sensor for detecting analytes ranging from gaseous to biological molecules.

National Institute for Materials Science (NIMS) announced on February 8, 2011 that Researcher Genki Yoshikawa of NIMS International Center for Materials Nanoarchitechtonics (MANA), Swiss Federal Institute of Technology, Lausanne and Nobel Laureate Dr. Heinrich Rohrer jointly developed a versatile high-sensitivity surface stress membrane sensor. Details were presented in NANO Letters of American Chemical Society*.

The nanomechanical cantilever sensor is a promising device for real-time and label-free detection of various analytes ranging from gaseous to biological molecules. The major sensing principle is based on the analyte-induced surface stress, which makes a cantilever bend. Bending is detected by a reflected laser beam. However, this method is not applicable to an opaque analyte such as blood. Piezoresistive cantilevers applicable to opaque analytes have the problem of lower sensitivity.

In this work, an "adsorbate membrane" is suspended by four piezoresistive "sensing beams", which constitute a full Wheatstone bridge. Stress unbalance induced by the adsorbed analyte is efficiently detected by the bridge. Evaluation of this membrane-type surface stress sensor demonstrates a high sensitivity comparable to optical methods and a factor of more than 20 higher than that obtained with a standard piezoresistive cantilever. The finite element analyses indicate that the sensitivity will be improved by changing dimensions of the membrane and beams.

Researchers suggest that this platform is expected to open a new era of surface stress-based sensing because of the various conveniences and advantages of the integrated piezoresistive read-out.

Journal information

*Genki Yoshikawa, Terunobu Akiyama, Sebastian Gautsch, Peter Vettiger, and Heinrich Rohrer, "Nanomechanical Membrane-type Surface Stress Sensor", Nano Letters, Article ASAP, DOI: 10.1021/nl103901a, Publication Date (Web): February 11, 2011.

Mikiko Tanifuji | Research asia research news
Further information:
http://nanonet.nims.go.jp/english/modules/news/article.php?a_id=741
http://www.researchsea.com

Further reports about: High-Sensitivity Materials Science Membrane Sensor Versatile

More articles from Materials Sciences:

nachricht Novel sensors could enable smarter textiles
17.08.2018 | University of Delaware

nachricht Quantum material is promising 'ion conductor' for research, new technologies
17.08.2018 | Purdue University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>