Experimental amplitude and frequency control of a self-excited microcantilever by linear and nonlinear feedback

2021 ◽  
Author(s):  
Eisuke Higuchi ◽  
Hiroshi Yabuno ◽  
Yasuyuki Yamamoto ◽  
Sohei Matsumoto
Keyword(s):  
Steady State ◽  
Frequency Control ◽  
High Sensitivity ◽  
High Viscosity ◽  
Measurement Methods ◽  
Nonlinear Feedback ◽  
Force Microscopy ◽  
Atomic Force ◽  
Excited Oscillation ◽  
Experimental Approaches

Abstract In recent years, measurement methods that use resonators as microcantilevers have attracted attention because of their high sensitivity, high accuracy, and rapid response time. They have been widely utilized in mass sensing, stiffness sensing, and atomic force microscopy (AFM), among other applications. In all these methods, it is essential to accurately detect shifts in the natural frequency of the resonator caused by an external force from a measured object or sample. Experimental approaches based on self-excited oscillation enable the detection of these shifts even when the resonator is immersed in a high-viscosity environment. In the present study, we experimentally and theoretically investigate the nonlinear characteristics of a microcantilever resonator and their control by nonlinear feedback. We show that the steady-state response amplitude and the corresponding response frequency can be controlled by cubic nonlinear velocity feedback and cubic nonlinear displacement feedback, respectively. Furthermore, the amplitude and frequency of the steady-state self-excited oscillation can be controlled separately. These results will expand application of measurement methods that use self-excited resonators.

scholarly journals High viscosity environments: an unexpected route to obtain true atomic resolution with atomic force microscopy

2014 ◽  
Vol 25 (17) ◽  
pp. 175701 ◽  
Author(s):  
Stefan A L Weber ◽  
Jason I Kilpatrick ◽  
Timothy M Brosnan ◽  
Suzanne P Jarvis ◽  
Brian J Rodriguez
Keyword(s):  
Atomic Force Microscopy ◽  
High Viscosity ◽  
Atomic Resolution ◽  
Force Microscopy ◽  
Atomic Force

Steady-State Crystal Nucleation Rate of Polyamide 66 by Combining Atomic Force Microscopy and Fast-Scanning Chip Calorimetry

2020 ◽  
Vol 53 (13) ◽  
pp. 5560-5571 ◽  
Author(s):  
Rui Zhang ◽  
Evgeny Zhuravlev ◽  
Jürn W. P. Schmelzer ◽  
René Androsch ◽  
Christoph Schick
Keyword(s):  
Atomic Force Microscopy ◽  
Steady State ◽  
Nucleation Rate ◽  
Crystal Nucleation ◽  
Polyamide 66 ◽  
Force Microscopy ◽  
Atomic Force ◽  
Chip Calorimetry ◽  
Fast Scanning Chip Calorimetry

Measurement of Interactions between Abrasive Silica Particles and Copper, Titanium, Tungsten and Tantalum

2007 ◽  
Vol 991 ◽  
Author(s):  
Ruslan Burtovyy ◽  
Alex Tregub ◽  
Mansour Moinpour ◽  
Mark Buehler ◽  
Igor Luzinov
Keyword(s):  
Ph Value ◽  
High Sensitivity ◽  
Model Systems ◽  
Thin Polymer Film ◽  
Colloidal Probe ◽  
Force Microscopy ◽  
Atomic Force ◽  
Afm Cantilever ◽  
The Moment ◽  
Silica Slurry

ABSTRACTColloidal probe technique has been widely employed to measure the adhesion between micro- and nanosize objects using atomic force microscopy (AFM). However, majority of studies concerns model systems, which do not incorporate real abrasive particles. The approach applied allows measuring adhesion between real CMP nanoparticles and different surfaces. Thin polymer film with high affinity to the particles was used to anchor the particles to a surface. Hollow glass bead (20-30 μm) representing flat surface was attached to soft AFM cantilever. Application of large hollow bead and the cantilever with small spring constant allows measuring the interactions with high sensitivity. Titanium, tungsten and tantalum metals were sputtered on the bead surface. The effect of different factors such as pH value, concentration and type of a surfactant on adhesion between surfaces of metals and silica slurry has been studied. Character and intensity of interactions at the moment of contact have been evaluated from experimental force-distance curves.

FORCE-DETECTED SCANNED PROBE MAGNETIC RESONANCE MICROSCOPY

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3378-3378
Author(s):  
P. C. HAMMEL
Keyword(s):  
Magnetic Resonance ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Atomic Scale ◽  
Magnetic Resonance Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Unique Method ◽  
Magnetic Resonance Imaging Mri ◽  
Non Destructive

Magnetic Resonance Force Microscopy (MRFM) is a novel scanned probe technique that combines the three-dimensional imaging capabilities of magnetic resonance imaging (MRI) with the high sensitivity and resolution of atomic force microscopy (AFM). This emerging technology holds clear potential for resolution at the atomic scale. When fully realized, MRFM will provide a unique method for non-destructive, chemically specifc, subsurface imaging with applicability to a wide variety of materials. I will review results to date spanning applications of MRFM to nuclear spin, electron spin, and ferromagnetic resonance. I will outline the MRFM technique, discuss its present status and indicate future directions of our effort.

scholarly journals Nanoscale Wetting of Single Viruses

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5184
Author(s):  
Annalisa Calò ◽  
Aitziber Eleta-Lopez ◽  
Thierry Ondarçuhu ◽  
Albert Verdaguer ◽  
Alexander M. Bittner
Keyword(s):  
Relative Humidity ◽  
Viral Infections ◽  
High Sensitivity ◽  
Water Layer ◽  
Dynamic Force ◽  
Force Microscopy ◽  
Virus Particles ◽  
Ambient Relative Humidity ◽  
Atomic Force ◽  
Condensed Water

The epidemic spread of many viral infections is mediated by the environmental conditions and influenced by the ambient humidity. Single virus particles have been mainly visualized by atomic force microscopy (AFM) in liquid conditions, where the effect of the relative humidity on virus topography and surface cannot be systematically assessed. In this work, we employed multi-frequency AFM, simultaneously with standard topography imaging, to study the nanoscale wetting of individual Tobacco Mosaic virions (TMV) from ambient relative humidity to water condensation (RH > 100%). We recorded amplitude and phase vs. distance curves (APD curves) on top of single virions at various RH and converted them into force vs. distance curves. The high sensitivity of multifrequency AFM to visualize condensed water and sub-micrometer droplets, filling gaps between individual TMV particles at RH > 100%, is demonstrated. Dynamic force spectroscopy allows detecting a thin water layer of thickness ⁓1 nm, adsorbed on the outer surface of single TMV particles at RH < 60%.

scholarly journals High-sensitivity Detection of Proteins using Gel Electrophoresis and Atomic Force Microscopy

Hyomen Kagaku ◽  
2009 ◽  
Vol 30 (6) ◽  
pp. 351-356
Author(s):  
Hiroshi SEKIGUCHI ◽  
Atsushi HIDAKA ◽  
Yoshihito SHIGA ◽  
Atsushi IKAI ◽  
Toshiya OSADA
Keyword(s):  
Atomic Force Microscopy ◽  
Gel Electrophoresis ◽  
High Sensitivity ◽  
Force Microscopy ◽  
Atomic Force ◽  
High Sensitivity Detection ◽  
Sensitivity Detection

Developing an electrochemical immunosensor for early diagnosis of hepatocellular carcinoma

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abdulrahman Al-Shami ◽  
Rami Joseph Oweis ◽  
Mohamed Ghazi Al-Fandi
Keyword(s):  
Hepatocellular Carcinoma ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Electrochemical Immunosensor ◽  
Content Type ◽  
Force Microscopy ◽  
Promising Tool ◽  
Atomic Force ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Purpose This paper aims to report on the development of a novel electrochemical amperometric immunosensor to diagnose early hepatocellular carcinoma (HCC) by detecting the Midkine (MDK) biomarker. Design/methodology/approach Anti-Midkine antibodies were immobilized covalently through carbodiimides chemistry on carbon screen-printed electrodes modified with carboxylated multi-walled carbon nanotubes. The development process was characterized using cyclic voltammetry, electrochemical impedimetric spectroscopy, Fourier transform infrared spectroscopy and atomic force microscopy. Differential pulse voltammetry was used to investigate the immunosensor performance in detecting MDK antigen within the concentration range of 1 pg/ml to 100 ng/ml. Findings MDK immunosensor exhibited high sensitivity and linearity with a detection limit of 0.8 pg/ml and a correlation coefficient of 0.99. The biosensor also demonstrated high selectivity, stability and reproducibility. Originality/value The developed MDK immunosensor could be a promising tool to diagnose HCC and reduce the number of related deaths.

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