NEC announced the successful development of artificial DNA aptamers (*1) that bind to the novel coronavirus (SARS-CoV-2). This breakthrough stems from the NEC Group’s efforts to promote spatial monitoring business using aptamers, including the development of new biosensing systems, such as measuring equipment that can monitor spaces where various viruses, including SARS-CoV-2 and influenza viruses, are present.
NEC uses NANOSENSORS™ Membrane Surface Stress Sensors (MSS) in the development of a measuring device that enables spatial monitoring of SARS-CoV-2.
In the article “Temperature effects on the nano-friction across exposed atomic step edges” Wen Wang, Ashu Wang and Lingyan Zeng describe how they used friction force microscopy ( FFM ) under ultrahigh vacuum ( UHV) conditions to study the temperature dependence of nanoscale friction between a silicon AFM tip ( NANOSENSORS™ PointProbe® Plus PPP-LFMR AFM probe for lateral/friction force microscopy ) and a freshly cleaved HOPG surface with exposed single- and double-layer step edges.*
They present experimental measurements as well as theoretical calculations of the temperature effects on atomic friction across HOPG surface step edges.*
Among other things the authors found that the resistive force for the double-layer step edge was twice as large as that of the single-step edge, and simultaneously, the assistive force that resulted from the horizontal component of the total force acting on the AFM tip seemed to be less influenced by the height of the step edges.*
Their experimental results also showed that temperature had very little effect on the friction coefficients at the step edges, which is inconsistent with the thermal activated friction where friction should decrease with temperature.*
Based on the theoretical studies, this observation can be explained by a process where the temperature effect is very small compared with the edge Schwoebel–Ehrlich barrier.*
The authors hope that their findings will contribute to understanding the temperature effects on macroscopic friction having a lot of step edges at the interface.*
*Wen Wang, Ashu Wang and Lingyan Zeng Temperature effects on the nano-friction across exposed atomic step edges AIP Advances 10, 085322 (2020) DOI: https://doi.org/10.1063/5.0019196
Open Access The article “Temperature effects on the nano-friction across exposed atomic step edges” by Wen Wang, Ashu Wang and Lingyan Zeng is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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The NANOSENSORS™ Membrane-type Surface-stress Sensor – MSS is a non-packaged MEMS sensor, a silicon membrane platform supported with four beams on which piezoresistors are embedded. It is mainly dedicated to R&D in the areas of olfactory sensing and electronic noses but some types can also be used for static/pulsed-field torque magnetometry and force sensing.
The MSS offered by NANOSENSORS via the Special Developments List are raw sensor platforms intended to provide researchers with a platform for their research so that they don’t have to start their setup from scratch. The MSS sensors will still need to be coated with detection layers developed and applied by the individual researchers in order to become functional sensors.
There are currently two major applications for this type of sensor:
the MSS has a great potential as a core component for electronic (artificial) nose systems / olfactory sensing systems utilized in e.g. food, environment, safety and security and medical ( e.g. human breath analysis ) fields. NANOSENSORS offers two types of MSS sensors for this application.: SD-MSS-1K2G and SD-MSS-1K2GP. The recently introduced SD-MSS-1K2GP can also be employed for “liquid” or “wet” applications thereby extending the potential use of MSS sensors to R&D in the sensing of taste, detections of chemical reactions in solutions, etc.
the MSS can also be used for assessment of various materials like organic conductors, magnetic and superconductor materials in torque magnetometry. NANOSENSORS currently offers three MSS sensors which can be used for this type of application: SD-MSS-1KTM, SD-MSS-1KPMAl and SD-MSS-1KPMAu.
On these pages you will not only get more information on which types of MSS Sensors are currently available but you will also find further information on the NANOSENSORS™ MSS 8 Channel Readout Module ( MSS-8RM ). The MSS-8RM is a basic electronic module to operate and to readout NANOSENSORS™ MSS that can be integrated in the researchers own set-up.