Direct Design of Closed-loop Demodulators for Amplitude Modulation Atomic Force Microscopy

2018 ◽  
Author(s):  
Michael G. Ruppert ◽  
David M. Harcombe ◽  
Steven I. Moore ◽  
Andrew J. Fleming
Keyword(s):  
Atomic Force Microscopy ◽  
Amplitude Modulation ◽  
Closed Loop ◽  
Force Microscopy ◽  
Atomic Force ◽  
Direct Design

Visualization of molecular binding sites at the nanoscale in the lift-up mode by amplitude-modulation atomic force microscopy

Nanoscale ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 4213-4220
Author(s):  
Tatsuhiro Maekawa ◽  
Takashi Nyu ◽  
Evan Angelo Quimada Mondarte ◽  
Hiroyuki Tahara ◽  
Kasinan Suthiwanich ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Molecular Recognition ◽  
Amplitude Modulation ◽  
Binding Sites ◽  
Local Distribution ◽  
New Approach ◽  
Molecular Binding ◽  
Force Microscopy ◽  
Atomic Force ◽  
Recognition Sites

We report a new approach to visualize the local distribution of molecular recognition sites with nanoscale resolution by amplitude-modulation atomic force microscopy.

Topographical changes in high-protein milk powders as a function of moisture sorption using amplitude-modulation atomic force microscopy.

2022 ◽  
pp. 107504
Author(s):  
Vinay S.N. Mishra ◽  
Tomasz J. Ochalski ◽  
Noel McCarthy ◽  
André Brodkorb ◽  
Brian J. Rodriguez ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Amplitude Modulation ◽  
Moisture Sorption ◽  
High Protein ◽  
Force Microscopy ◽  
Atomic Force ◽  
Protein Milk

Probing the Adsorption of Weak Acids on Graphite Using Amplitude Modulation–Frequency Modulation Atomic Force Microscopy

Langmuir ◽  
2015 ◽  
Vol 31 (10) ◽  
pp. 3069-3075 ◽  
Author(s):  
Ahmed M. A. Moustafa ◽  
Jun Huang ◽  
Kerry N. McPhedran ◽  
Hongbo Zeng ◽  
Mohamed Gamal El-Din
Keyword(s):  
Atomic Force Microscopy ◽  
Amplitude Modulation ◽  
Frequency Modulation ◽  
Modulation Frequency ◽  
Weak Acids ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals A review of demodulation techniques for multifrequency atomic force microscopy

2020 ◽  
Vol 11 ◽  
pp. 76-91 ◽  
Author(s):  
David M Harcombe ◽  
Michael G Ruppert ◽  
Andrew J Fleming
Keyword(s):  
Atomic Force Microscopy ◽  
Sampling Rate ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
Direct Design ◽  
Field Programmable ◽  
Frequency Components ◽  
Atomic Force Microscopy Imaging ◽  
Lock In

This article compares the performance of traditional and recently proposed demodulators for multifrequency atomic force microscopy. The compared methods include the lock-in amplifier, coherent demodulator, Kalman filter, Lyapunov filter, and direct-design demodulator. Each method is implemented on a field-programmable gate array (FPGA) with a sampling rate of 1.5 MHz. The metrics for comparison include the sensitivity to other frequency components and the magnitude of demodulation artifacts for a range of demodulator bandwidths. Performance differences are demonstrated through higher harmonic atomic force microscopy imaging.

scholarly journals Three-dimensional hydration layer mapping on the (10.4) surface of calcite using amplitude modulation atomic force microscopy

2014 ◽  
Vol 25 (33) ◽  
pp. 335703 ◽  
Author(s):  
Christoph Marutschke ◽  
Deron Walters ◽  
Jason Cleveland ◽  
Ilka Hermes ◽  
Ralf Bechstein ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Amplitude Modulation ◽  
Three Dimensional ◽  
Hydration Layer ◽  
Force Microscopy ◽  
Atomic Force
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