Theoretical study on the optimal thermal excitation of bimaterial cantilevers

Pham, Vinh N. T.; Hoang, Chu Manh; Huy, Ho Thanh; Dat, Le Tri; Vy, Nguyen Duy; Iida, Takuya; Payam, Amir Farokh

doi:10.35848/1882-0786/ab8e0a

Cited by 6 publications

(1 citation statement)

References 29 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detection using high-harmonic frequencies Atomic force microscope (AFM) with the microcantilever as central nowadays is becoming a conventional device in the detection of micro to nano-objects that helps to reveal the physical and chemical properties in nanoscale. [1][2][3][4][5] Several studies have been adopted to enhance the functionality of the cantilever via changing its cross-section materials [6][7][8][9][10] and dimensions [11][12][13][14][15] and revealed that the sensitivity of the cantilever sensor could be enhanced if higher modes of oscillation are used [16][17][18][19] and the quality factor could be increased, especially when functioned in liquids. 20,21) This is explained by the fact that the surface-to-bulk ratio is lower at higher-order modes, which leads to lower air/fluid damping.…”

mentioning

confidence: 99%

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

Dat,

Cuong Nguyen,

Duy Vy

et al. 2023

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

High-harmonic (HH) frequencies in microcantilever impose several applications in precision detection thanks to the higher sensitivity of the higher modes in comparison to the fundamental modes. In this study, we showed that by tuning the cantilever length via changing the clamped position, the dimensional ratio of the overhang to the main cantilever part is altered and the HHs could be effectively obtained. Multiple HH frequencies have been achieved, from 4th to 8th order of the second- and from 11th to 26th order of the third-mechanical mode versus the first mode, and these orders are much higher if higher modes are used. The analytical calculation is in agreement with available results of other groups. HH behavior when the cantilever is interaction with sample is also examined and is strongly depending on the overhang parameters. These results could guide the experimentalist in the tuning and controlling of the HHs in detecting objects.

show abstract

mentioning

confidence: 99%

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

Dat,

Cuong Nguyen,

Duy Vy

et al. 2023

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Effect of bimaterial microcantilever physical dimensions on photothermal sensing characteristics

Ramaiah

Prabakar

2021

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Low frequency photothermal excitation of AFM microcantilevers

Deolia

Raman

Wagner

2023

Journal of Applied Physics

View full text Add to dashboard Cite

Photothermal excitation at frequencies below the mechanical resonance of the atomic force microscopy (AFM) microcantilever can be utilized in force modulation microscopy, fast force displacement curve acquisition, and tip-based mass spectroscopy. To understand the microcantilever bending response in these modes, accurate models of the thermoelastic response of the AFM microcantilever are needed. We study the sub-resonance photothermal vibrational response of coated and uncoated AFM microcantilevers as a function of laser modulation frequency and spot location. The sub-resonance microcantilever response shows distinct thermoelastic regimes. Below the microcantilever's thermal roll-off frequency, the vibration amplitude is mostly constant. Past this frequency, the vibration amplitude decreases with increasing frequency. At modulation frequencies below the thermal roll-off frequency, the most efficient photothermal laser spot to excite harmonic motion is near the free end of both coated and uncoated microcantilevers. For the tested coated microcantilevers, the most efficient photothermal laser location migrates from near the free end of the microcantilever to near the fixed end as modulation frequency increases. For the tested uncoated microcantilever, the most efficient photothermal laser location remains unchanged at the tested frequencies. To predict the bending response of the coated microcantilever, a bilayer bending model is implemented. At low frequencies, this model underpredicts the bending response compared to experiments by up to 90%. This may be due to neglecting microcantilever bending contributed by a through-thickness temperature gradient. Our results illustrate different aspects of the frequency-dependent photothermal laser spot optimization that can guide users to maximizing microcantilever response to a given input power.

show abstract

Theoretical study on the optimal thermal excitation of bimaterial cantilevers

Cited by 6 publications

References 29 publications

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

Tuning the flexural frequency of overhang-/T-shaped microcantilevers for high harmonics

Effect of bimaterial microcantilever physical dimensions on photothermal sensing characteristics

Low frequency photothermal excitation of AFM microcantilevers

Contact Info

Product

Resources

About