Monitoring Surface Thermal Transitions of ABA Triblock Copolymers with Crystalline Segments Using Phase Contrast Tapping Mode Atomic Force Microscopy

Langmuir ◽  
2005 ◽  
Vol 21 (4) ◽  
pp. 1143-1148 ◽  
Author(s):  
Wei Wu ◽  
Krzysztof Matyjaszewski ◽  
Tomasz Kowalewski
Keyword(s):  
Atomic Force Microscopy ◽  
Phase Contrast ◽  
Triblock Copolymers ◽  
Thermal Transitions ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mode Atomic Force Microscopy

scholarly journals Deconvolution of dissipative pathways for the interpretation of tapping-mode atomic force microscopy from phase-contrast

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Arindam Phani ◽  
Ho Sang Jung ◽  
Seonghwan Kim
Keyword(s):  
Atomic Force Microscopy ◽  
Phase Contrast ◽  
Soft Tissues ◽  
Loss Mechanism ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Single Cancer ◽  
Nanoscale Features ◽  
Mode Atomic Force Microscopy

AbstractPhase-contrast in tapping-mode atomic force microscopy (TM-AFM) results from dynamic tip-surface interaction losses which allow soft and hard nanoscale features to be distinguished. So far, phase-contrast in TM-AFM has been interpreted using homogeneous Boltzmann-like loss distributions that ignore fluctuations. Here, we revisit the origin of phase-contrast in TM-AFM by considering the role of fluctuation-driven transitions and heterogeneous loss. At ultra-light tapping amplitudes <3 nm, a unique amplitude dependent two-stage distribution response is revealed, alluding to metastable viscous relaxations that originate from tapping-induced surface perturbations. The elastic and viscous coefficients are also quantitatively estimated from the resulting strain rate at the fixed tapping frequency. The transitional heterogeneous losses emerge as the dominant loss mechanism outweighing homogeneous losses at smaller amplitudes for a soft-material. Analogous fluctuation mediated phase-contrast is also apparent in contact resonance enhanced AFM-IR (infrared), showing promise in decoupling competing thermal loss mechanisms via radiative and non-radiative pathways. Understanding the loss pathways can provide insights on the bio-physical origins of heterogeneities in soft-bio-matter e.g., single cancer cell, tumors, and soft-tissues.

Phase contrast and attraction–repulsion transition in tapping mode atomic force microscopy

2002 ◽  
Vol 519 (1-2) ◽  
pp. L593-L598 ◽  
Author(s):  
X Chen ◽  
C.J Roberts ◽  
J Zhang ◽  
M.C Davies ◽  
S.J.B Tendler
Keyword(s):  
Atomic Force Microscopy ◽  
Phase Contrast ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mode Atomic Force Microscopy

Tapping Mode Atomic Force Microscopy Studies of the Photoreduction of Ag+on Individual Submicrometer TiO2Particles

Langmuir ◽  
1999 ◽  
Vol 15 (25) ◽  
pp. 8569-8573 ◽  
Author(s):  
William E. Farneth ◽  
R. Scott McLean ◽  
John D. Bolt ◽  
Eleni Dokou ◽  
Mark A. Barteau
Keyword(s):  
Atomic Force Microscopy ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mode Atomic Force Microscopy

TAPPING MODE ATOMIC FORCE MICROSCOPY OF HYALURONAN AND HYLAN A

Hyaluronan ◽  
2002 ◽  
pp. 109-116 ◽  
Author(s):  
Mary K. Cowman ◽  
Min Li ◽  
Ansil Dyal ◽  
Sonoko Kanai
Keyword(s):  
Atomic Force Microscopy ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Mode Atomic Force Microscopy
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