Slip Length Measurement of Water Flow on Graphite Surface Using Atomic Force Microscope

2014 ◽  
Vol 941-944 ◽  
pp. 1581-1584 ◽  
Author(s):  
Da Yong Li ◽  
Da Lei Jing ◽  
Yun Lu Pan ◽  
Khurshid Ahmad ◽  
Xue Zeng Zhao

In this paper, we present experimental measurements of slip length of deionized (DI) water flow on a silicon surface and a graphite surface by using atomic force microscope. The results show that the measured hydrodynamic drag force is higher on silicon surface than that on graphite surface, and a measured slip length about 10 nm is obtained on the later surface.

2008 ◽  
Vol 8 (9) ◽  
pp. 4757-4760 ◽  
Author(s):  
Yong-il Kim ◽  
Hyunsook Kim ◽  
Haiwon Lee

AMF anodization lithography was performed on organic thin films with conducting polymers which is poly(3,4-ethylenedioxythiophene). The conductivity of PEDOT thin films was changed by different dopants and organic solvents. Two different dopants are poly(4-styrenesulfonate) and di(2-ethylhexyl)-sulfosuccinate. Also, DMF and IPA were used to prepare the PEDOT thin films doped with PSS and DEHS on silicon surface. The conductivities of these PEDOT variants were compared by obtaining their I–V curves between tip and thin films using AFM. Silicon oxide nanopatterns with higher aspect ratios can be obtained from the films with higher conductivity.


2019 ◽  
Author(s):  
◽  
Anna Elizabeth Pittman

In my projects, I used the Atomic Force Microscope (AFM) to image the effects of pore-forming peptides and I used the Focused Ion Beam (FIB) to modify AFM cantilevers to increase the precision of force spectroscopy measurements. ... Another way to investigate peptide-lipid interactions is to perform force spectroscopy experiments using the AFM. In order to lower drift and increase force precision, I used a FIB to modify commercially available AFM cantilevers. By reducing the cross sectional area of the cantilever, the hydrodynamic drag was reduced, thus increasing the force precision. Removing most of the gold coating on the cantilever increased the temporal stability. These modified cantilevers have already been put to use in the lab to measure peptide-lipid interactions.


Micron ◽  
2014 ◽  
Vol 66 ◽  
pp. 37-46 ◽  
Author(s):  
J.V. Méndez-Méndez ◽  
M.T. Alonso-Rasgado ◽  
E. Correia Faria ◽  
E.A. Flores-Johnson ◽  
R.D. Snook

1992 ◽  
Vol 60 (19) ◽  
pp. 2356-2358 ◽  
Author(s):  
S. J. O’Shea ◽  
M. E. Welland ◽  
T. Rayment

2007 ◽  
Vol 353-358 ◽  
pp. 742-745
Author(s):  
Fei Wang ◽  
Xue Zeng Zhao

The cantilevers of atomic force microscope (AFM) are mounted under a certain tilt angle, which is commonly assumed to have negligible effect on friction measurements in AFM. We present a theoretical study of the effect of the tilt angle on AFM based friction measurements. A method for correcting the friction coefficient between sample surfaces and AFM tips is also presented to minimize the effects of the tilt. The frictional forces between a silicon tip and a silicon surface at tilt angles ranging from 5 degrees to 25 degrees were measured. The results show that the measured friction coefficient increases with the tilt angle effectively, whereas the variation range of the corrected friction coefficient is within 10%.


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