MSS Forum is launched to promote establishment of a de facto standard for olfactory IoT sensing systems.


What is MSS

mss=Membrane-type Surface stress Sensor

Standard measure for scent and odor.MSS is a versatile, ultra-compact/sensitive sensor element capable of measuring diverse molecules including various odorous gas molecules.
[MSS chip]Sensitive,Compact,Versatile Working principle of the MSS

MSS is a new type of nanomechanical sensors jointly developed in 2011 by Genki Yoshikawa of National Institute for Materials Science (NIMS), the late Dr. Heinrich Rohrer, and Swiss Federal Institute of Technology in Lausanne (EPFL).

Unlike conventional cantilever-type sensors with optical read-out, MSS utilizes electric read-out based on piezoresistors, which enable drastic miniaturization. Owing to its unique structure, the sensitivity of MSS reaches approximately 100 times greater than that of the conventional piezoresistive nanomechanical sensors.

A compact sensor capable of detecting various substances in the atmosphere has long been demanded. Such artificial olfaction and its effective social implementation still remain unclear although there are many publications and publicities in this field recently.

As a key component of artificial olfaction, the MSS is expected to largely contribute to enhance people’s lives and medical care, bridging cyber and physical spaces by converting gaseous substances into multi-dimensional information.

The MSS has proved to be capable of measuring/analyzing scents and odors quantitatively in addition to qualitative assessments. For examples, alcohol contents of liquors and ripening stages of European pears can be quantitatively predicted through their odors; even though such odors are composed of highly complicated mixture of gas molecules.

Example:Successful Prediction of Alcohol Contents through Smells of Liquors

Characteristics of MSS

  • 【High sensitivity】Capable to measure gas molecules (≧ppm) & biomolecules (≧nM), depending on receptor materials
  • 【Ultra compact】A channel is under 1 sq. mm in size, i.e. 100 channels loadable in 1 sq. cm
  • 【Versatile】Various organic & inorganic materials usable as receptor layer materials
  • 【Temperature】Usable in both high and low temperatures depending on receptor materials
  • 【Low cost】Mass producible as is made of silicon
  • 【Low energy consumption】Each channel under 1 mW
  • 【Quick response】Response under 1 second is possible depending on gas flow rate
  • 【Stability】Stable thermally, electrically and mechanically
  • 【Coatings on both sides】Dip coating possible

MSS introductory video

Coming soon.